Sun Aug 18th 2024 Allegiant Air · G4 3021 Depart at 9:00am from Knoxville (TYS) Fly for 3h 1m Arrive at 10:01am in Denver (DEN)
Tue Jul 2nd 2024 Allegiant Air · G4 3806 Depart at 1:50pm from Knoxville (TYS) Fly for 3h 6m Arrive at 2:56pm in Denver (DEN)
Sun Jun 2nd 2024 Allegiant Air · G4 3021 Depart at 6:30am from Knoxville (TYS) Fly for 3h 8m Arrive at 7:38am in Denver (DEN)
Sun Sep 8th 2024 Allegiant Air · G4 3021 Depart at 10:00am from Knoxville (TYS) Fly for 3h 9m Arrive at 11:09am in Denver (DEN)
Mon Jun 10th 2024 Frontier Airlines · F9 2373 Depart at 10:41pm from Knoxville (TYS) Fly for 3h 34m Arrive at 12:15am in Denver (DEN)
Sun Sep 1st 2024 Allegiant Air · G4 3021 Depart at 9:00am from Knoxville (TYS) Fly for 3h 1m Arrive at 10:01am in Denver (DEN)
Thu Aug 1st 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 8m Arrive at 7:08am in Denver (DEN)
Sat May 11th 2024 Frontier Airlines · F9 2373 Depart at 10:58am from Knoxville (TYS) Fly for 3h 22m Arrive at 12:20pm in Denver (DEN)
Sat May 4th 2024 Frontier Airlines · F9 2373 Depart at 10:58am from Knoxville (TYS) Fly for 3h 22m Arrive at 12:20pm in Denver (DEN)
Wed May 8th 2024 Frontier Airlines · F9 2373 Depart at 10:51am from Knoxville (TYS) Fly for 3h 22m Arrive at 12:13pm in Denver (DEN)
Wed May 15th 2024 Frontier Airlines · F9 2373 Depart at 10:51am from Knoxville (TYS) Fly for 3h 22m Arrive at 12:13pm in Denver (DEN)
Wed May 22nd 2024 Frontier Airlines · F9 4369 Depart at 5:31pm from Knoxville (TYS) Fly for 3h 24m Arrive at 6:55pm in Denver (DEN)
Wed May 1st 2024 Frontier Airlines · F9 2373 Depart at 10:51am from Knoxville (TYS) Fly for 3h 22m Arrive at 12:13pm in Denver (DEN)
Thu Aug 15th 2024 Allegiant Air · G4 3021 Depart at 9:00am from Knoxville (TYS) Fly for 3h 1m Arrive at 10:01am in Denver (DEN)
Thu Jun 6th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 6m Arrive at 7:06am in Denver (DEN)
Thu Aug 8th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 8m Arrive at 7:08am in Denver (DEN)
Thu Jul 25th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 8m Arrive at 7:08am in Denver (DEN)
Sun Aug 25th 2024 Allegiant Air · G4 3021 Depart at 9:00am from Knoxville (TYS) Fly for 3h 1m Arrive at 10:01am in Denver (DEN)
Thu May 30th 2024 Allegiant Air · G4 3021 Depart at 6:30am from Knoxville (TYS) Fly for 3h 8m Arrive at 7:38am in Denver (DEN)
Sun Aug 11th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 8m Arrive at 7:08am in Denver (DEN)
Sun Jul 28th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 8m Arrive at 7:08am in Denver (DEN)
Thu Oct 17th 2024 Allegiant Air · G4 1439 Depart at 3:56pm from Knoxville (TYS) Fly for 3h 13m Arrive at 5:09pm in Denver (DEN)
Mon Jun 17th 2024 Frontier Airlines · F9 2373 Depart at 10:41pm from Knoxville (TYS) Fly for 3h 34m Arrive at 12:15am in Denver (DEN)
Thu Aug 22nd 2024 Allegiant Air · G4 3021 Depart at 9:00am from Knoxville (TYS) Fly for 3h 1m Arrive at 10:01am in Denver (DEN)
Sun Aug 4th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 8m Arrive at 7:08am in Denver (DEN)
Thu Oct 10th 2024 Allegiant Air · G4 1439 Depart at 3:56pm from Knoxville (TYS) Fly for 3h 13m Arrive at 5:09pm in Denver (DEN)
Sun Jun 16th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 6m Arrive at 7:06am in Denver (DEN)
Sun Jun 9th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 6m Arrive at 7:06am in Denver (DEN)
Thu Jul 4th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 8m Arrive at 7:08am in Denver (DEN)
Sun Jul 14th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 8m Arrive at 7:08am in Denver (DEN)
Thu Sep 19th 2024 Allegiant Air · G4 3021 Depart at 10:00am from Knoxville (TYS) Fly for 3h 9m Arrive at 11:09am in Denver (DEN)
Thu Sep 5th 2024 Allegiant Air · G4 3021 Depart at 10:00am from Knoxville (TYS) Fly for 3h 9m Arrive at 11:09am in Denver (DEN)
Thu May 2nd 2024 Frontier Airlines · F9 4380 Depart at 8:13am from Knoxville (TYS) Fly for 1h 45m Arrive at 9:58am in Orlando (MCO)
Layover in Orlando for 11h 1m
Thu May 2nd 2024 Frontier Airlines · F9 3921 Depart at 8:59pm from Orlando (MCO) Fly for 4h 27m Arrive at 11:26pm in Denver (DEN)
Wed Jun 5th 2024 Frontier Airlines · F9 4369 Depart at 7:47pm from Knoxville (TYS) Fly for 3h 21m Arrive at 9:08pm in Denver (DEN)
Sat Jun 1st 2024 Frontier Airlines · F9 4369 Depart at 5:13pm from Knoxville (TYS) Fly for 3h 24m Arrive at 6:37pm in Denver (DEN)
Wed May 29th 2024 Frontier Airlines · F9 4369 Depart at 5:31pm from Knoxville (TYS) Fly for 3h 24m Arrive at 6:55pm in Denver (DEN)
Fri May 31st 2024 Frontier Airlines · F9 4369 Depart at 4:01pm from Knoxville (TYS) Fly for 3h 26m Arrive at 5:27pm in Denver (DEN)
Sun Sep 22nd 2024 Allegiant Air · G4 3021 Depart at 10:00am from Knoxville (TYS) Fly for 3h 9m Arrive at 11:09am in Denver (DEN)
Mon Jul 1st 2024 Frontier Airlines · F9 4369 Depart at 6:17pm from Knoxville (TYS) Fly for 3h 3m Arrive at 7:20pm in Denver (DEN)
Thu Aug 29th 2024 Allegiant Air · G4 3021 Depart at 9:00am from Knoxville (TYS) Fly for 3h 1m Arrive at 10:01am in Denver (DEN)
Sun Jun 30th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 6m Arrive at 7:06am in Denver (DEN)
Thu Jun 13th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 6m Arrive at 7:06am in Denver (DEN)
Sun Sep 15th 2024 Allegiant Air · G4 3021 Depart at 10:00am from Knoxville (TYS) Fly for 3h 9m Arrive at 11:09am in Denver (DEN)
Thu Sep 26th 2024 Allegiant Air · G4 3021 Depart at 10:00am from Knoxville (TYS) Fly for 3h 9m Arrive at 11:09am in Denver (DEN)
Thu Oct 3rd 2024 Allegiant Air · G4 1439 Depart at 3:56pm from Knoxville (TYS) Fly for 3h 13m Arrive at 5:09pm in Denver (DEN)
Sun Oct 13th 2024 Allegiant Air · G4 3030 Depart at 3:56pm from Knoxville (TYS) Fly for 3h 13m Arrive at 5:09pm in Denver (DEN)
Mon Jul 22nd 2024 Frontier Airlines · F9 4369 Depart at 6:17pm from Knoxville (TYS) Fly for 3h 3m Arrive at 7:20pm in Denver (DEN)
Sat Jul 13th 2024 Frontier Airlines · F9 4369 Depart at 5:40pm from Knoxville (TYS) Fly for 3h 3m Arrive at 6:43pm in Denver (DEN)
Sat May 18th 2024 Frontier Airlines · F9 4369 Depart at 5:27pm from Knoxville (TYS) Fly for 3h 24m Arrive at 6:51pm in Denver (DEN)
Mon May 20th 2024 Frontier Airlines · F9 3949 Depart at 6:38pm from Knoxville (TYS) Fly for 3h 24m Arrive at 8:02pm in Denver (DEN)
Thu Jun 20th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 6m Arrive at 7:06am in Denver (DEN)
Sun Jul 21st 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 8m Arrive at 7:08am in Denver (DEN)
Sun Sep 29th 2024 Allegiant Air · G4 3021 Depart at 10:00am from Knoxville (TYS) Fly for 3h 9m Arrive at 11:09am in Denver (DEN)
Thu Sep 12th 2024 Allegiant Air · G4 3021 Depart at 10:00am from Knoxville (TYS) Fly for 3h 9m Arrive at 11:09am in Denver (DEN)
Sun Oct 6th 2024 Allegiant Air · G4 3030 Depart at 3:56pm from Knoxville (TYS) Fly for 3h 13m Arrive at 5:09pm in Denver (DEN)
Wed Jun 19th 2024 Frontier Airlines · F9 4369 Depart at 7:47pm from Knoxville (TYS) Fly for 3h 21m Arrive at 9:08pm in Denver (DEN)
Mon Jun 24th 2024 Frontier Airlines · F9 2373 Depart at 10:41pm from Knoxville (TYS) Fly for 3h 34m Arrive at 12:15am in Denver (DEN)
Mon May 6th 2024 Frontier Airlines · F9 2373 Depart at 10:51am from Knoxville (TYS) Fly for 3h 22m Arrive at 12:13pm in Denver (DEN)
Fri May 10th 2024 Frontier Airlines · F9 2373 Depart at 10:56am from Knoxville (TYS) Fly for 3h 22m Arrive at 12:18pm in Denver (DEN)
Mon May 13th 2024 Frontier Airlines · F9 2373 Depart at 10:51am from Knoxville (TYS) Fly for 3h 22m Arrive at 12:13pm in Denver (DEN)
Fri May 3rd 2024 Frontier Airlines · F9 2373 Depart at 10:56am from Knoxville (TYS) Fly for 3h 22m Arrive at 12:18pm in Denver (DEN)
Fri May 17th 2024 Frontier Airlines · F9 2373 Depart at 9:02pm from Knoxville (TYS) Fly for 3h 31m Arrive at 10:33pm in Denver (DEN)
Sun Jun 23rd 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 6m Arrive at 7:06am in Denver (DEN)
Thu May 2nd 2024 Frontier Airlines · F9 4380 Depart at 8:13am from Knoxville (TYS) Fly for 1h 45m Arrive at 9:58am in Orlando (MCO)
Layover in Orlando for 4h 1m
Thu May 2nd 2024 Frontier Airlines · F9 3311 Depart at 1:59pm from Orlando (MCO) Fly for 4h 21m Arrive at 4:20pm in Denver (DEN)
Wed Jul 24th 2024 Frontier Airlines · F9 4369 Depart at 6:17pm from Knoxville (TYS) Fly for 3h 3m Arrive at 7:20pm in Denver (DEN)
Fri Jun 14th 2024 Frontier Airlines · F9 2373 Depart at 10:25pm from Knoxville (TYS) Fly for 3h 34m Arrive at 11:59pm in Denver (DEN)
Fri Jun 28th 2024 Frontier Airlines · F9 2373 Depart at 10:25pm from Knoxville (TYS) Fly for 3h 34m Arrive at 11:59pm in Denver (DEN)
Sat May 25th 2024 Frontier Airlines · F9 4369 Depart at 5:13pm from Knoxville (TYS) Fly for 3h 24m Arrive at 6:37pm in Denver (DEN)
Thu Jul 18th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 8m Arrive at 7:08am in Denver (DEN)
Thu Jul 11th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 8m Arrive at 7:08am in Denver (DEN)
Mon Jul 15th 2024 Frontier Airlines · F9 4369 Depart at 6:17pm from Knoxville (TYS) Fly for 3h 3m Arrive at 7:20pm in Denver (DEN)
Wed Jul 17th 2024 Frontier Airlines · F9 4369 Depart at 6:17pm from Knoxville (TYS) Fly for 3h 3m Arrive at 7:20pm in Denver (DEN)
Fri May 24th 2024 Frontier Airlines · F9 4375 Depart at 8:43pm from Knoxville (TYS) Fly for 3h 29m Arrive at 10:12pm in Denver (DEN)
Wed Jun 12th 2024 Frontier Airlines · F9 4369 Depart at 7:47pm from Knoxville (TYS) Fly for 3h 21m Arrive at 9:08pm in Denver (DEN)
Wed Jul 3rd 2024 Frontier Airlines · F9 4369 Depart at 6:17pm from Knoxville (TYS) Fly for 3h 3m Arrive at 7:20pm in Denver (DEN)
Mon May 27th 2024 Frontier Airlines · F9 3949 Depart at 6:35pm from Knoxville (TYS) Fly for 3h 24m Arrive at 7:59pm in Denver (DEN)
Tue Apr 30th 2024 Frontier Airlines · F9 4380 Depart at 8:48am from Knoxville (TYS) Fly for 1h 45m Arrive at 10:33am in Orlando (MCO)
Layover in Orlando for 2h 50m
Tue Apr 30th 2024 Frontier Airlines · F9 3311 Depart at 1:23pm from Orlando (MCO) Fly for 4h 21m Arrive at 3:44pm in Denver (DEN)
Fri Jun 21st 2024 Frontier Airlines · F9 2373 Depart at 10:25pm from Knoxville (TYS) Fly for 3h 34m Arrive at 11:59pm in Denver (DEN)
Sat Jun 15th 2024 Frontier Airlines · F9 4369 Depart at 5:51pm from Knoxville (TYS) Fly for 3h 24m Arrive at 7:15pm in Denver (DEN)
Mon Jul 8th 2024 Frontier Airlines · F9 4369 Depart at 6:17pm from Knoxville (TYS) Fly for 3h 3m Arrive at 7:20pm in Denver (DEN)
Sun Jul 7th 2024 Allegiant Air · G4 3021 Depart at 6:00am from Knoxville (TYS) Fly for 3h 8m Arrive at 7:08am in Denver (DEN)
Wed Jul 10th 2024 Frontier Airlines · F9 4369 Depart at 6:17pm from Knoxville (TYS) Fly for 3h 3m Arrive at 7:20pm in Denver (DEN)
Sun May 26th 2024 United Airlines · UA 335 Depart at 4:37pm from Knoxville (TYS) Fly for 3h 18m Arrive at 5:55pm in Denver (DEN)
Wed Jun 5th 2024 United Airlines · UA 1005 Depart at 4:37pm from Knoxville (TYS) Fly for 3h 18m Arrive at 5:55pm in Denver (DEN)
Mon Jul 1st 2024 United Airlines · UA 637 Depart at 4:45pm from Knoxville (TYS) Fly for 3h 18m Arrive at 6:03pm in Denver (DEN)
Fri Jun 28th 2024 United Airlines · UA 637 Depart at 4:45pm from Knoxville (TYS) Fly for 3h 18m Arrive at 6:03pm in Denver (DEN)
Fri Jul 19th 2024 United Airlines · UA 637 Depart at 4:45pm from Knoxville (TYS) Fly for 3h 18m Arrive at 6:03pm in Denver (DEN)
Fri Aug 9th 2024 United Airlines · UA 637 Depart at 4:45pm from Knoxville (TYS) Fly for 3h 18m Arrive at 6:03pm in Denver (DEN)
Thu Jul 4th 2024 United Airlines · UA 637 Depart at 4:45pm from Knoxville (TYS) Fly for 3h 18m Arrive at 6:03pm in Denver (DEN)
Wed May 29th 2024 United Airlines · UA 335 Depart at 4:37pm from Knoxville (TYS) Fly for 3h 18m Arrive at 5:55pm in Denver (DEN)
Thu Sep 12th 2024 United Airlines · UA 696 Depart at 4:48pm from Knoxville (TYS) Fly for 3h 18m Arrive at 6:06pm in Denver (DEN)
Wed Jul 24th 2024 United Airlines · UA 637 Depart at 4:45pm from Knoxville (TYS) Fly for 3h 18m Arrive at 6:03pm in Denver (DEN)
Sun Jul 7th 2024 United Airlines · UA 637 Depart at 4:45pm from Knoxville (TYS) Fly for 3h 18m Arrive at 6:03pm in Denver (DEN)
Wed Aug 14th 2024 United Airlines · UA 637 Depart at 4:45pm from Knoxville (TYS) Fly for 3h 18m Arrive at 6:03pm in Denver (DEN)
Sun Aug 4th 2024 United Airlines · UA 637 Depart at 4:45pm from Knoxville (TYS) Fly for 3h 18m Arrive at 6:03pm in Denver (DEN)
Thu Aug 1st 2024 United Airlines · UA 637 Depart at 4:45pm from Knoxville (TYS) Fly for 3h 18m Arrive at 6:03pm in Denver (DEN)
Tue Jun 11th 2024 United Airlines · UA 1005 Depart at 4:37pm from Knoxville (TYS) Fly for 3h 18m Arrive at 5:55pm in Denver (DEN)
Sun Sep 22nd 2024 United Airlines · UA 696 Depart at 4:48pm from Knoxville (TYS) Fly for 3h 18m Arrive at 6:06pm in Denver (DEN)
Wed Jul 3rd 2024 United Airlines · UA 637 Depart at 4:45pm from Knoxville (TYS) Fly for 3h 18m Arrive at 6:03pm in Denver (DEN)
Thu Jul 25th 2024 United Airlines · UA 637 Depart at 4:45pm from Knoxville (TYS) Fly for 3h 18m Arrive at 6:03pm in Denver (DEN)
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Tips to help you find the cheapest flights from Knoxville to Denver (TYS to DEN).
❝As someone who works remotely & travels frequently, I always book one way flights and I'm flexible on my departure dates. I look for the best deals. Most sites require you to enter a specific departure date and clutter the page with uneccessary options, images and ads. I want something simple and minimal which allows me to search by departure date range & display a list of flights with the ability to filter according to my needs. So, I built FlightList to solve my own problem & help other travelers who may have the same frustration. It's how I imagine a flight booking site should be.❞