Flights from St. Louis to Washington (STL to IAD)

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US$143

9:17am - 2:37pm
Sun Aug 31st 2025

4h 20m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sun Aug 31st 2025 United Airlines · UA 4597 Depart at 9:17am from St. Louis (STL) Fly for 1h 30m Arrive at 10:47am in Chicago (ORD)

Layover in Chicago for 0h 53m

Sun Aug 31st 2025 United Airlines · UA 1878 Depart at 11:40am from Chicago (ORD) Fly for 1h 57m Arrive at 2:37pm in Washington, D.C. (IAD)
US$143

8:10am - 1:49pm
Sun Aug 31st 2025

4h 39m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sun Aug 31st 2025 United Airlines · UA 4183 Depart at 8:10am from St. Louis (STL) Fly for 1h 30m Arrive at 9:40am in Chicago (ORD)

Layover in Chicago for 1h 3m

Sun Aug 31st 2025 United Airlines · UA 1030 Depart at 10:43am from Chicago (ORD) Fly for 2h 6m Arrive at 1:49pm in Washington, D.C. (IAD)
US$143

8:10am - 2:37pm
Sun Aug 31st 2025

5h 27m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sun Aug 31st 2025 United Airlines · UA 4183 Depart at 8:10am from St. Louis (STL) Fly for 1h 30m Arrive at 9:40am in Chicago (ORD)

Layover in Chicago for 2h 0m

Sun Aug 31st 2025 United Airlines · UA 1878 Depart at 11:40am from Chicago (ORD) Fly for 1h 57m Arrive at 2:37pm in Washington, D.C. (IAD)
US$144

5:30pm - 12:32am
Sat Aug 30th 2025

6h 2m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sat Aug 30th 2025 United Airlines · UA 1156 Depart at 5:30pm from St. Louis (STL) Fly for 1h 25m Arrive at 6:55pm in Chicago (ORD)

Layover in Chicago for 2h 36m

Sat Aug 30th 2025 United Airlines · UA 276 Depart at 9:31pm from Chicago (ORD) Fly for 2h 1m Arrive at 12:32am in Washington, D.C. (IAD)
US$187

6:35am - 2:37pm
Fri Aug 29th 2025

7h 2m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Fri Aug 29th 2025 United Airlines · UA 4423 Depart at 6:35am from St. Louis (STL) Fly for 1h 30m Arrive at 8:05am in Chicago (ORD)

Layover in Chicago for 3h 35m

Fri Aug 29th 2025 United Airlines · UA 1878 Depart at 11:40am from Chicago (ORD) Fly for 1h 57m Arrive at 2:37pm in Washington, D.C. (IAD)
US$194

5:30pm - 11:55am
Mon Sep 1st 2025

17h 25m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Mon Sep 1st 2025 United Airlines · UA 1156 Depart at 5:30pm from St. Louis (STL) Fly for 1h 25m Arrive at 6:55pm in Chicago (ORD)

Layover in Chicago for 13h 55m

Tue Sep 2nd 2025 United Airlines · UA 2029 Depart at 8:50am from Chicago (ORD) Fly for 2h 5m Arrive at 11:55am in Washington, D.C. (IAD)
US$194

5:30pm - 1:49pm
Mon Sep 1st 2025

19h 19m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Mon Sep 1st 2025 United Airlines · UA 1156 Depart at 5:30pm from St. Louis (STL) Fly for 1h 25m Arrive at 6:55pm in Chicago (ORD)

Layover in Chicago for 15h 48m

Tue Sep 2nd 2025 United Airlines · UA 1030 Depart at 10:43am from Chicago (ORD) Fly for 2h 6m Arrive at 1:49pm in Washington, D.C. (IAD)
US$194

5:30pm - 2:37pm
Mon Sep 1st 2025

20h 7m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Mon Sep 1st 2025 United Airlines · UA 1156 Depart at 5:30pm from St. Louis (STL) Fly for 1h 25m Arrive at 6:55pm in Chicago (ORD)

Layover in Chicago for 16h 45m

Tue Sep 2nd 2025 United Airlines · UA 1757 Depart at 11:40am from Chicago (ORD) Fly for 1h 57m Arrive at 2:37pm in Washington, D.C. (IAD)
US$207

8:15am - 11:25am
Sun Aug 31st 2025

2h 10m
St. Louis (STL) → Washington, D.C. (IAD)

Direct

Sun Aug 31st 2025 United Airlines · UA 4506 Depart at 8:15am from St. Louis (STL) Fly for 2h 10m Arrive at 11:25am in Washington, D.C. (IAD)
US$207

5:30pm - 11:55am
Sat Aug 30th 2025

17h 25m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sat Aug 30th 2025 United Airlines · UA 1156 Depart at 5:30pm from St. Louis (STL) Fly for 1h 25m Arrive at 6:55pm in Chicago (ORD)

Layover in Chicago for 13h 55m

Sun Aug 31st 2025 United Airlines · UA 2029 Depart at 8:50am from Chicago (ORD) Fly for 2h 5m Arrive at 11:55am in Washington, D.C. (IAD)
US$208

6:35am - 11:55am
Sat Aug 30th 2025

4h 20m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sat Aug 30th 2025 United Airlines · UA 4423 Depart at 6:35am from St. Louis (STL) Fly for 1h 30m Arrive at 8:05am in Chicago (ORD)

Layover in Chicago for 0h 45m

Sat Aug 30th 2025 United Airlines · UA 2029 Depart at 8:50am from Chicago (ORD) Fly for 2h 5m Arrive at 11:55am in Washington, D.C. (IAD)
US$208

9:17am - 2:37pm
Sat Aug 30th 2025

4h 20m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sat Aug 30th 2025 United Airlines · UA 4597 Depart at 9:17am from St. Louis (STL) Fly for 1h 30m Arrive at 10:47am in Chicago (ORD)

Layover in Chicago for 0h 53m

Sat Aug 30th 2025 United Airlines · UA 1878 Depart at 11:40am from Chicago (ORD) Fly for 1h 57m Arrive at 2:37pm in Washington, D.C. (IAD)
US$208

9:17am - 3:52pm
Sat Aug 30th 2025

5h 35m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sat Aug 30th 2025 United Airlines · UA 4597 Depart at 9:17am from St. Louis (STL) Fly for 1h 30m Arrive at 10:47am in Chicago (ORD)

Layover in Chicago for 2h 3m

Sat Aug 30th 2025 United Airlines · UA 1377 Depart at 12:50pm from Chicago (ORD) Fly for 2h 2m Arrive at 3:52pm in Washington, D.C. (IAD)
US$208

6:35am - 1:49pm
Sat Aug 30th 2025

6h 14m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sat Aug 30th 2025 United Airlines · UA 4423 Depart at 6:35am from St. Louis (STL) Fly for 1h 30m Arrive at 8:05am in Chicago (ORD)

Layover in Chicago for 2h 38m

Sat Aug 30th 2025 United Airlines · UA 1030 Depart at 10:43am from Chicago (ORD) Fly for 2h 6m Arrive at 1:49pm in Washington, D.C. (IAD)
US$208

6:35am - 2:37pm
Sat Aug 30th 2025

7h 2m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sat Aug 30th 2025 United Airlines · UA 4423 Depart at 6:35am from St. Louis (STL) Fly for 1h 30m Arrive at 8:05am in Chicago (ORD)

Layover in Chicago for 3h 35m

Sat Aug 30th 2025 United Airlines · UA 1878 Depart at 11:40am from Chicago (ORD) Fly for 1h 57m Arrive at 2:37pm in Washington, D.C. (IAD)
US$218

6:35am - 11:55am
Sun Aug 31st 2025

4h 20m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sun Aug 31st 2025 United Airlines · UA 4423 Depart at 6:35am from St. Louis (STL) Fly for 1h 30m Arrive at 8:05am in Chicago (ORD)

Layover in Chicago for 0h 45m

Sun Aug 31st 2025 United Airlines · UA 2029 Depart at 8:50am from Chicago (ORD) Fly for 2h 5m Arrive at 11:55am in Washington, D.C. (IAD)
US$218

5:30pm - 12:32am
Sun Aug 31st 2025

6h 2m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sun Aug 31st 2025 United Airlines · UA 1156 Depart at 5:30pm from St. Louis (STL) Fly for 1h 25m Arrive at 6:55pm in Chicago (ORD)

Layover in Chicago for 2h 36m

Sun Aug 31st 2025 United Airlines · UA 276 Depart at 9:31pm from Chicago (ORD) Fly for 2h 1m Arrive at 12:32am in Washington, D.C. (IAD)
US$218

6:35am - 1:49pm
Sun Aug 31st 2025

6h 14m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sun Aug 31st 2025 United Airlines · UA 4423 Depart at 6:35am from St. Louis (STL) Fly for 1h 30m Arrive at 8:05am in Chicago (ORD)

Layover in Chicago for 2h 38m

Sun Aug 31st 2025 United Airlines · UA 1030 Depart at 10:43am from Chicago (ORD) Fly for 2h 6m Arrive at 1:49pm in Washington, D.C. (IAD)
US$218

6:35am - 2:37pm
Sun Aug 31st 2025

7h 2m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sun Aug 31st 2025 United Airlines · UA 4423 Depart at 6:35am from St. Louis (STL) Fly for 1h 30m Arrive at 8:05am in Chicago (ORD)

Layover in Chicago for 3h 35m

Sun Aug 31st 2025 United Airlines · UA 1878 Depart at 11:40am from Chicago (ORD) Fly for 1h 57m Arrive at 2:37pm in Washington, D.C. (IAD)
US$235

9:17am - 5:30pm
Sat Aug 30th 2025

7h 13m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sat Aug 30th 2025 United Airlines · UA 4597 Depart at 9:17am from St. Louis (STL) Fly for 1h 30m Arrive at 10:47am in Chicago (ORD)

Layover in Chicago for 3h 45m

Sat Aug 30th 2025 United Airlines · UA 587 Depart at 2:32pm from Chicago (ORD) Fly for 1h 58m Arrive at 5:30pm in Washington, D.C. (IAD)
US$258

4:40pm - 5:22am
Sat Aug 30th 2025

11h 42m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sat Aug 30th 2025 United Airlines · UA 483 Depart at 4:40pm from St. Louis (STL) Fly for 2h 22m Arrive at 6:02pm in Denver (DEN)

Layover in Denver for 5h 57m

Sat Aug 30th 2025 United Airlines · UA 1924 Depart at 11:59pm from Denver (DEN) Fly for 3h 23m Arrive at 5:22am in Washington, D.C. (IAD)
US$266

8:15am - 11:25am
Mon Sep 1st 2025

2h 10m
St. Louis (STL) → Washington, D.C. (IAD)

Direct

Mon Sep 1st 2025 United Airlines · UA 4506 Depart at 8:15am from St. Louis (STL) Fly for 2h 10m Arrive at 11:25am in Washington, D.C. (IAD)
US$298

6:35am - 3:52pm
Sat Aug 30th 2025

8h 17m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sat Aug 30th 2025 United Airlines · UA 4423 Depart at 6:35am from St. Louis (STL) Fly for 1h 30m Arrive at 8:05am in Chicago (ORD)

Layover in Chicago for 4h 45m

Sat Aug 30th 2025 United Airlines · UA 1377 Depart at 12:50pm from Chicago (ORD) Fly for 2h 2m Arrive at 3:52pm in Washington, D.C. (IAD)
US$307

8:20am - 11:55pm
Mon Sep 1st 2025

14h 35m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Mon Sep 1st 2025 United Airlines · UA 1277 Depart at 8:20am from St. Louis (STL) Fly for 2h 11m Arrive at 10:31am in Houston (IAH)

Layover in Houston for 9h 19m

Mon Sep 1st 2025 United Airlines · UA 2352 Depart at 7:50pm from Houston (IAH) Fly for 3h 5m Arrive at 11:55pm in Washington, D.C. (IAD)
US$310

6:35am - 12:32am
Fri Aug 29th 2025

16h 57m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Fri Aug 29th 2025 United Airlines · UA 4423 Depart at 6:35am from St. Louis (STL) Fly for 1h 30m Arrive at 8:05am in Chicago (ORD)

Layover in Chicago for 13h 26m

Fri Aug 29th 2025 United Airlines · UA 276 Depart at 9:31pm from Chicago (ORD) Fly for 2h 1m Arrive at 12:32am in Washington, D.C. (IAD)
US$313

8:15am - 11:25am
Fri Aug 29th 2025

2h 10m
St. Louis (STL) → Washington, D.C. (IAD)

Direct

Fri Aug 29th 2025 United Airlines · UA 4506 Depart at 8:15am from St. Louis (STL) Fly for 2h 10m Arrive at 11:25am in Washington, D.C. (IAD)
US$314

4:32pm - 11:55pm
Sat Aug 30th 2025

6h 23m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sat Aug 30th 2025 United Airlines · UA 6273 Depart at 4:32pm from St. Louis (STL) Fly for 2h 18m Arrive at 6:50pm in Houston (IAH)

Layover in Houston for 1h 0m

Sat Aug 30th 2025 United Airlines · UA 2352 Depart at 7:50pm from Houston (IAH) Fly for 3h 5m Arrive at 11:55pm in Washington, D.C. (IAD)
US$314

6:30pm - 7:32am
Fri Aug 29th 2025

12h 2m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Fri Aug 29th 2025 Hawaiian Airlines · HA 7125 Depart at 6:30pm from St. Louis (STL) Fly for 4h 24m Arrive at 8:54pm in Seattle (SEA)

Layover in Seattle for 2h 36m

Fri Aug 29th 2025 Hawaiian Airlines · HA 6718 Depart at 11:30pm from Seattle (SEA) Fly for 5h 2m Arrive at 7:32am in Washington, D.C. (IAD)
US$319

6:35am - 11:55am
Fri Aug 29th 2025

4h 20m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Fri Aug 29th 2025 United Airlines · UA 4423 Depart at 6:35am from St. Louis (STL) Fly for 1h 30m Arrive at 8:05am in Chicago (ORD)

Layover in Chicago for 0h 45m

Fri Aug 29th 2025 United Airlines · UA 2029 Depart at 8:50am from Chicago (ORD) Fly for 2h 5m Arrive at 11:55am in Washington, D.C. (IAD)
US$319

8:10am - 2:37pm
Fri Aug 29th 2025

5h 27m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Fri Aug 29th 2025 United Airlines · UA 4183 Depart at 8:10am from St. Louis (STL) Fly for 1h 30m Arrive at 9:40am in Chicago (ORD)

Layover in Chicago for 2h 0m

Fri Aug 29th 2025 United Airlines · UA 1878 Depart at 11:40am from Chicago (ORD) Fly for 1h 57m Arrive at 2:37pm in Washington, D.C. (IAD)
US$319

9:17am - 3:52pm
Sun Aug 31st 2025

5h 35m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sun Aug 31st 2025 United Airlines · UA 4597 Depart at 9:17am from St. Louis (STL) Fly for 1h 30m Arrive at 10:47am in Chicago (ORD)

Layover in Chicago for 2h 3m

Sun Aug 31st 2025 United Airlines · UA 1377 Depart at 12:50pm from Chicago (ORD) Fly for 2h 2m Arrive at 3:52pm in Washington, D.C. (IAD)
US$319

5:30pm - 12:32am
Fri Aug 29th 2025

6h 2m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Fri Aug 29th 2025 United Airlines · UA 1156 Depart at 5:30pm from St. Louis (STL) Fly for 1h 25m Arrive at 6:55pm in Chicago (ORD)

Layover in Chicago for 2h 36m

Fri Aug 29th 2025 United Airlines · UA 276 Depart at 9:31pm from Chicago (ORD) Fly for 2h 1m Arrive at 12:32am in Washington, D.C. (IAD)
US$319

8:10am - 3:52pm
Sun Aug 31st 2025

6h 42m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sun Aug 31st 2025 United Airlines · UA 4183 Depart at 8:10am from St. Louis (STL) Fly for 1h 30m Arrive at 9:40am in Chicago (ORD)

Layover in Chicago for 3h 10m

Sun Aug 31st 2025 United Airlines · UA 1377 Depart at 12:50pm from Chicago (ORD) Fly for 2h 2m Arrive at 3:52pm in Washington, D.C. (IAD)
US$319

8:20am - 4:23pm
Sun Aug 31st 2025

7h 3m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sun Aug 31st 2025 United Airlines · UA 1277 Depart at 8:20am from St. Louis (STL) Fly for 2h 11m Arrive at 10:31am in Houston (IAH)

Layover in Houston for 1h 44m

Sun Aug 31st 2025 United Airlines · UA 2366 Depart at 12:15pm from Houston (IAH) Fly for 3h 8m Arrive at 4:23pm in Washington, D.C. (IAD)
US$319

6:15am - 2:48pm
Sun Aug 31st 2025

7h 33m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sun Aug 31st 2025 United Airlines · UA 1371 Depart at 6:15am from St. Louis (STL) Fly for 2h 11m Arrive at 8:26am in Houston (IAH)

Layover in Houston for 2h 14m

Sun Aug 31st 2025 United Airlines · UA 2134 Depart at 10:40am from Houston (IAH) Fly for 3h 8m Arrive at 2:48pm in Washington, D.C. (IAD)
US$338

6:30pm - 5:09pm
Mon Sep 1st 2025

21h 39m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Mon Sep 1st 2025 Hawaiian Airlines · HA 7125 Depart at 6:30pm from St. Louis (STL) Fly for 4h 29m Arrive at 8:59pm in Seattle (SEA)

Layover in Seattle for 12h 6m

Tue Sep 2nd 2025 Hawaiian Airlines · HA 6724 Depart at 9:05am from Seattle (SEA) Fly for 5h 4m Arrive at 5:09pm in Washington, D.C. (IAD)
US$343

8:15am - 11:25am
Sat Aug 30th 2025

2h 10m
St. Louis (STL) → Washington, D.C. (IAD)

Direct

Sat Aug 30th 2025 United Airlines · UA 4506 Depart at 8:15am from St. Louis (STL) Fly for 2h 10m Arrive at 11:25am in Washington, D.C. (IAD)
US$351

11:30am - 5:30pm
Sun Aug 31st 2025

5h 0m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sun Aug 31st 2025 United Airlines · UA 4395 Depart at 11:30am from St. Louis (STL) Fly for 1h 30m Arrive at 1:00pm in Chicago (ORD)

Layover in Chicago for 1h 32m

Sun Aug 31st 2025 United Airlines · UA 587 Depart at 2:32pm from Chicago (ORD) Fly for 1h 58m Arrive at 5:30pm in Washington, D.C. (IAD)
US$351

6:15am - 2:48pm
Sat Aug 30th 2025

7h 33m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sat Aug 30th 2025 United Airlines · UA 6269 Depart at 6:15am from St. Louis (STL) Fly for 2h 19m Arrive at 8:34am in Houston (IAH)

Layover in Houston for 2h 6m

Sat Aug 30th 2025 United Airlines · UA 2134 Depart at 10:40am from Houston (IAH) Fly for 3h 8m Arrive at 2:48pm in Washington, D.C. (IAD)
US$371

9:17am - 2:37pm
Fri Aug 29th 2025

4h 20m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Fri Aug 29th 2025 United Airlines · UA 4597 Depart at 9:17am from St. Louis (STL) Fly for 1h 30m Arrive at 10:47am in Chicago (ORD)

Layover in Chicago for 0h 53m

Fri Aug 29th 2025 United Airlines · UA 1878 Depart at 11:40am from Chicago (ORD) Fly for 1h 57m Arrive at 2:37pm in Washington, D.C. (IAD)
US$371

5:30pm - 12:32am
Mon Sep 1st 2025

6h 2m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Mon Sep 1st 2025 United Airlines · UA 1156 Depart at 5:30pm from St. Louis (STL) Fly for 1h 25m Arrive at 6:55pm in Chicago (ORD)

Layover in Chicago for 2h 36m

Mon Sep 1st 2025 United Airlines · UA 276 Depart at 9:31pm from Chicago (ORD) Fly for 2h 1m Arrive at 12:32am in Washington, D.C. (IAD)
US$386

6:30pm - 7:33am
Mon Sep 1st 2025

12h 3m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Mon Sep 1st 2025 Hawaiian Airlines · HA 7125 Depart at 6:30pm from St. Louis (STL) Fly for 4h 29m Arrive at 8:59pm in Seattle (SEA)

Layover in Seattle for 2h 31m

Mon Sep 1st 2025 Hawaiian Airlines · HA 6718 Depart at 11:30pm from Seattle (SEA) Fly for 5h 3m Arrive at 7:33am in Washington, D.C. (IAD)
US$394

1:10pm - 4:20pm
Sun Aug 31st 2025

2h 10m
St. Louis (STL) → Washington, D.C. (IAD)

Direct

Sun Aug 31st 2025 United Airlines · UA 4454 Depart at 1:10pm from St. Louis (STL) Fly for 2h 10m Arrive at 4:20pm in Washington, D.C. (IAD)
US$417

3:20pm - 8:55pm
Sun Aug 31st 2025

4h 35m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sun Aug 31st 2025 United Airlines · UA 3611 Depart at 3:20pm from St. Louis (STL) Fly for 1h 32m Arrive at 4:52pm in Chicago (ORD)

Layover in Chicago for 1h 3m

Sun Aug 31st 2025 United Airlines · UA 2677 Depart at 5:55pm from Chicago (ORD) Fly for 2h 0m Arrive at 8:55pm in Washington, D.C. (IAD)
US$417

6:35am - 1:49pm
Fri Aug 29th 2025

6h 14m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Fri Aug 29th 2025 United Airlines · UA 4423 Depart at 6:35am from St. Louis (STL) Fly for 1h 30m Arrive at 8:05am in Chicago (ORD)

Layover in Chicago for 2h 38m

Fri Aug 29th 2025 United Airlines · UA 1030 Depart at 10:43am from Chicago (ORD) Fly for 2h 6m Arrive at 1:49pm in Washington, D.C. (IAD)
US$443

6:30pm - 7:32am
Sun Aug 31st 2025

12h 2m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sun Aug 31st 2025 Hawaiian Airlines · HA 7125 Depart at 6:30pm from St. Louis (STL) Fly for 4h 24m Arrive at 8:54pm in Seattle (SEA)

Layover in Seattle for 2h 36m

Sun Aug 31st 2025 Hawaiian Airlines · HA 6718 Depart at 11:30pm from Seattle (SEA) Fly for 5h 2m Arrive at 7:32am in Washington, D.C. (IAD)
US$468

3:20pm - 8:55pm
Sat Aug 30th 2025

4h 35m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sat Aug 30th 2025 United Airlines · UA 4549 Depart at 3:20pm from St. Louis (STL) Fly for 1h 30m Arrive at 4:50pm in Chicago (ORD)

Layover in Chicago for 1h 5m

Sat Aug 30th 2025 United Airlines · UA 2677 Depart at 5:55pm from Chicago (ORD) Fly for 2h 0m Arrive at 8:55pm in Washington, D.C. (IAD)
US$528

9:17am - 2:37pm
Mon Sep 1st 2025

4h 20m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Mon Sep 1st 2025 United Airlines · UA 4597 Depart at 9:17am from St. Louis (STL) Fly for 1h 30m Arrive at 10:47am in Chicago (ORD)

Layover in Chicago for 0h 53m

Mon Sep 1st 2025 United Airlines · UA 1878 Depart at 11:40am from Chicago (ORD) Fly for 1h 57m Arrive at 2:37pm in Washington, D.C. (IAD)
US$528

11:30am - 5:30pm
Fri Aug 29th 2025

5h 0m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Fri Aug 29th 2025 United Airlines · UA 4395 Depart at 11:30am from St. Louis (STL) Fly for 1h 30m Arrive at 1:00pm in Chicago (ORD)

Layover in Chicago for 1h 32m

Fri Aug 29th 2025 United Airlines · UA 587 Depart at 2:32pm from Chicago (ORD) Fly for 1h 58m Arrive at 5:30pm in Washington, D.C. (IAD)
US$528

11:30am - 5:30pm
Mon Sep 1st 2025

5h 0m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Mon Sep 1st 2025 United Airlines · UA 4395 Depart at 11:30am from St. Louis (STL) Fly for 1h 30m Arrive at 1:00pm in Chicago (ORD)

Layover in Chicago for 1h 32m

Mon Sep 1st 2025 United Airlines · UA 587 Depart at 2:32pm from Chicago (ORD) Fly for 1h 58m Arrive at 5:30pm in Washington, D.C. (IAD)
US$528

4:32pm - 11:55pm
Mon Sep 1st 2025

6h 23m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Mon Sep 1st 2025 United Airlines · UA 6273 Depart at 4:32pm from St. Louis (STL) Fly for 2h 18m Arrive at 6:50pm in Houston (IAH)

Layover in Houston for 1h 0m

Mon Sep 1st 2025 United Airlines · UA 2352 Depart at 7:50pm from Houston (IAH) Fly for 3h 5m Arrive at 11:55pm in Washington, D.C. (IAD)
US$563

1:10pm - 4:20pm
Fri Aug 29th 2025

2h 10m
St. Louis (STL) → Washington, D.C. (IAD)

Direct

Fri Aug 29th 2025 United Airlines · UA 4454 Depart at 1:10pm from St. Louis (STL) Fly for 2h 10m Arrive at 4:20pm in Washington, D.C. (IAD)
US$563

1:10pm - 4:20pm
Mon Sep 1st 2025

2h 10m
St. Louis (STL) → Washington, D.C. (IAD)

Direct

Mon Sep 1st 2025 United Airlines · UA 4454 Depart at 1:10pm from St. Louis (STL) Fly for 2h 10m Arrive at 4:20pm in Washington, D.C. (IAD)
US$586

4:32pm - 11:55pm
Sun Aug 31st 2025

6h 23m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Sun Aug 31st 2025 United Airlines · UA 6273 Depart at 4:32pm from St. Louis (STL) Fly for 2h 18m Arrive at 6:50pm in Houston (IAH)

Layover in Houston for 1h 0m

Sun Aug 31st 2025 United Airlines · UA 2352 Depart at 7:50pm from Houston (IAH) Fly for 3h 5m Arrive at 11:55pm in Washington, D.C. (IAD)
US$607

1:10pm - 4:20pm
Sat Aug 30th 2025

2h 10m
St. Louis (STL) → Washington, D.C. (IAD)

Direct

Sat Aug 30th 2025 United Airlines · UA 4454 Depart at 1:10pm from St. Louis (STL) Fly for 2h 10m Arrive at 4:20pm in Washington, D.C. (IAD)
US$612

3:20pm - 8:55pm
Fri Aug 29th 2025

4h 35m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Fri Aug 29th 2025 United Airlines · UA 3611 Depart at 3:20pm from St. Louis (STL) Fly for 1h 32m Arrive at 4:52pm in Chicago (ORD)

Layover in Chicago for 1h 3m

Fri Aug 29th 2025 United Airlines · UA 2677 Depart at 5:55pm from Chicago (ORD) Fly for 2h 0m Arrive at 8:55pm in Washington, D.C. (IAD)
US$665

3:20pm - 8:55pm
Mon Sep 1st 2025

4h 35m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Mon Sep 1st 2025 United Airlines · UA 3611 Depart at 3:20pm from St. Louis (STL) Fly for 1h 32m Arrive at 4:52pm in Chicago (ORD)

Layover in Chicago for 1h 3m

Mon Sep 1st 2025 United Airlines · UA 2677 Depart at 5:55pm from Chicago (ORD) Fly for 2h 0m Arrive at 8:55pm in Washington, D.C. (IAD)
US$758

6:30pm - 6:58am
Fri Aug 29th 2025

11h 28m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Fri Aug 29th 2025 Hawaiian Airlines · HA 7125 Depart at 6:30pm from St. Louis (STL) Fly for 4h 24m Arrive at 8:54pm in Seattle (SEA)

Layover in Seattle for 2h 1m

Fri Aug 29th 2025 United Airlines · UA 684 Depart at 10:55pm from Seattle (SEA) Fly for 5h 3m Arrive at 6:58am in Washington, D.C. (IAD)
US$851

4:32pm - 11:55pm
Fri Aug 29th 2025

6h 23m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Fri Aug 29th 2025 United Airlines · UA 6273 Depart at 4:32pm from St. Louis (STL) Fly for 2h 18m Arrive at 6:50pm in Houston (IAH)

Layover in Houston for 1h 0m

Fri Aug 29th 2025 United Airlines · UA 2352 Depart at 7:50pm from Houston (IAH) Fly for 3h 5m Arrive at 11:55pm in Washington, D.C. (IAD)
US$1084

6:30pm - 6:58am
Mon Sep 1st 2025

11h 28m
St. Louis (STL) → Washington, D.C. (IAD)

1 Stop

Mon Sep 1st 2025 Hawaiian Airlines · HA 7125 Depart at 6:30pm from St. Louis (STL) Fly for 4h 29m Arrive at 8:59pm in Seattle (SEA)

Layover in Seattle for 1h 56m

Mon Sep 1st 2025 United Airlines · UA 684 Depart at 10:55pm from Seattle (SEA) Fly for 5h 3m Arrive at 6:58am in Washington, D.C. (IAD)

Sarah Belizaire

@sarahbb1

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John Ford

@eyupitsjohn

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Roaming Sonaa

@roamingsonaa

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Andy Travels

@andy_travels

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Travel With Bender

@travelwitbender

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Wesley Mergard

@travel.with.wes

One useful tool I've found for evaluating different departure and return dates is called FlightList.io. You can quickly scan different travel date ranges, carriers and one way flight options to easily determine the cheapest flight combinations for your trip.

Flights from St. Louis to Washington (STL to IAD)

Sarah Belizaire

John Ford

Roaming Sonaa

Andy Travels

Travel With Bender

Wesley Mergard

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