Cheap Flights from Ontario to Portland (ONT to PDX)

Discover more affordable routes and cheaper dates from Ontario to Portland (ONT to PDX) within a date range.

⭐ Search by country or region to discover more affordable routes, like Netherlands → Italy or Europe → South East Asia.

Results Quantity

Cabin Bags

Checked Bags

Max Budget

US$

Max Duration

Hours

Max Layover

Hours

Departure Time

Connections

Select Airlines

Loading…

US$64

12:59am - 12:37am
Tue Mar 25th 2025

23h 38m
Ontario (ONT) → Portland (PDX)

1 Stop

Tue Mar 25th 2025 Frontier Airlines · F9 1500 Depart at 12:59am from Ontario (ONT) Fly for 2h 17m Arrive at 4:16am in Denver (DEN)

Layover in Denver for 18h 29m

Tue Mar 25th 2025 Frontier Airlines · F9 2687 Depart at 10:45pm from Denver (DEN) Fly for 2h 52m Arrive at 12:37am in Portland (PDX)
US$64

12:59am - 12:37am
Wed Mar 26th 2025

23h 38m
Ontario (ONT) → Portland (PDX)

1 Stop

Wed Mar 26th 2025 Frontier Airlines · F9 1500 Depart at 12:59am from Ontario (ONT) Fly for 2h 17m Arrive at 4:16am in Denver (DEN)

Layover in Denver for 18h 29m

Wed Mar 26th 2025 Frontier Airlines · F9 2687 Depart at 10:45pm from Denver (DEN) Fly for 2h 52m Arrive at 12:37am in Portland (PDX)
US$83

7:00am - 9:24am
Tue Mar 25th 2025

2h 24m
Ontario (ONT) → Portland (PDX)

Direct

Tue Mar 25th 2025 Hawaiian Airlines · HA 4882 Depart at 7:00am from Ontario (ONT) Fly for 2h 24m Arrive at 9:24am in Portland (PDX)
US$83

6:55am - 9:19am
Wed Mar 26th 2025

2h 24m
Ontario (ONT) → Portland (PDX)

Direct

Wed Mar 26th 2025 Hawaiian Airlines · HA 4862 Depart at 6:55am from Ontario (ONT) Fly for 2h 24m Arrive at 9:19am in Portland (PDX)
US$94

5:44pm - 8:07pm
Mon Mar 24th 2025

2h 23m
Ontario (ONT) → Portland (PDX)

Direct

Mon Mar 24th 2025 Hawaiian Airlines · HA 6286 Depart at 5:44pm from Ontario (ONT) Fly for 2h 23m Arrive at 8:07pm in Portland (PDX)
US$94

6:55am - 9:19am
Mon Mar 24th 2025

2h 24m
Ontario (ONT) → Portland (PDX)

Direct

Mon Mar 24th 2025 Hawaiian Airlines · HA 4862 Depart at 6:55am from Ontario (ONT) Fly for 2h 24m Arrive at 9:19am in Portland (PDX)
US$94

10:18am - 12:45pm
Mon Mar 24th 2025

2h 27m
Ontario (ONT) → Portland (PDX)

Direct

Mon Mar 24th 2025 Hawaiian Airlines · HA 6284 Depart at 10:18am from Ontario (ONT) Fly for 2h 27m Arrive at 12:45pm in Portland (PDX)
US$95

7:00am - 9:24am
Tue Mar 25th 2025

2h 24m
Ontario (ONT) → Portland (PDX)

Direct

Tue Mar 25th 2025 Alaska Airlines · AS 1058 Depart at 7:00am from Ontario (ONT) Fly for 2h 24m Arrive at 9:24am in Portland (PDX)
US$95

6:55am - 9:19am
Wed Mar 26th 2025

2h 24m
Ontario (ONT) → Portland (PDX)

Direct

Wed Mar 26th 2025 Alaska Airlines · AS 1058 Depart at 6:55am from Ontario (ONT) Fly for 2h 24m Arrive at 9:19am in Portland (PDX)
US$105

5:44pm - 8:07pm
Tue Mar 25th 2025

2h 23m
Ontario (ONT) → Portland (PDX)

Direct

Tue Mar 25th 2025 Hawaiian Airlines · HA 6286 Depart at 5:44pm from Ontario (ONT) Fly for 2h 23m Arrive at 8:07pm in Portland (PDX)
US$106

5:44pm - 8:07pm
Mon Mar 24th 2025

2h 23m
Ontario (ONT) → Portland (PDX)

Direct

Mon Mar 24th 2025 Alaska Airlines · AS 2202 Depart at 5:44pm from Ontario (ONT) Fly for 2h 23m Arrive at 8:07pm in Portland (PDX)
US$106

6:55am - 9:19am
Mon Mar 24th 2025

2h 24m
Ontario (ONT) → Portland (PDX)

Direct

Mon Mar 24th 2025 Alaska Airlines · AS 1058 Depart at 6:55am from Ontario (ONT) Fly for 2h 24m Arrive at 9:19am in Portland (PDX)
US$106

10:18am - 12:45pm
Mon Mar 24th 2025

2h 27m
Ontario (ONT) → Portland (PDX)

Direct

Mon Mar 24th 2025 Alaska Airlines · AS 3312 Depart at 10:18am from Ontario (ONT) Fly for 2h 27m Arrive at 12:45pm in Portland (PDX)
US$107

10:18am - 12:45pm
Tue Mar 25th 2025

2h 27m
Ontario (ONT) → Portland (PDX)

Direct

Tue Mar 25th 2025 Hawaiian Airlines · HA 6284 Depart at 10:18am from Ontario (ONT) Fly for 2h 27m Arrive at 12:45pm in Portland (PDX)
US$116

5:44pm - 8:07pm
Tue Mar 25th 2025

2h 23m
Ontario (ONT) → Portland (PDX)

Direct

Tue Mar 25th 2025 Alaska Airlines · AS 2202 Depart at 5:44pm from Ontario (ONT) Fly for 2h 23m Arrive at 8:07pm in Portland (PDX)
US$116

10:18am - 12:45pm
Tue Mar 25th 2025

2h 27m
Ontario (ONT) → Portland (PDX)

Direct

Tue Mar 25th 2025 Alaska Airlines · AS 3312 Depart at 10:18am from Ontario (ONT) Fly for 2h 27m Arrive at 12:45pm in Portland (PDX)
US$137

10:18am - 12:45pm
Wed Mar 26th 2025

2h 27m
Ontario (ONT) → Portland (PDX)

Direct

Wed Mar 26th 2025 Hawaiian Airlines · HA 6284 Depart at 10:18am from Ontario (ONT) Fly for 2h 27m Arrive at 12:45pm in Portland (PDX)
US$148

10:18am - 12:45pm
Wed Mar 26th 2025

2h 27m
Ontario (ONT) → Portland (PDX)

Direct

Wed Mar 26th 2025 Alaska Airlines · AS 3312 Depart at 10:18am from Ontario (ONT) Fly for 2h 27m Arrive at 12:45pm in Portland (PDX)
US$164

6:00am - 10:52am
Mon Mar 24th 2025

4h 52m
Ontario (ONT) → Portland (PDX)

1 Stop

Mon Mar 24th 2025 Hawaiian Airlines · HA 6288 Depart at 6:00am from Ontario (ONT) Fly for 2h 50m Arrive at 8:50am in Seattle (SEA)

Layover in Seattle for 1h 10m

Mon Mar 24th 2025 Hawaiian Airlines · HA 6835 Depart at 10:00am from Seattle (SEA) Fly for 0h 52m Arrive at 10:52am in Portland (PDX)
US$164

6:45pm - 12:50am
Tue Mar 25th 2025

6h 5m
Ontario (ONT) → Portland (PDX)

1 Stop

Tue Mar 25th 2025 United Airlines · UA 5429 Depart at 6:45pm from Ontario (ONT) Fly for 1h 33m Arrive at 8:18pm in San Francisco (SFO)

Layover in San Francisco for 2h 37m

Tue Mar 25th 2025 United Airlines · UA 2080 Depart at 10:55pm from San Francisco (SFO) Fly for 1h 55m Arrive at 12:50am in Portland (PDX)
US$164

6:00am - 12:25pm
Mon Mar 24th 2025

6h 25m
Ontario (ONT) → Portland (PDX)

1 Stop

Mon Mar 24th 2025 Hawaiian Airlines · HA 6288 Depart at 6:00am from Ontario (ONT) Fly for 2h 50m Arrive at 8:50am in Seattle (SEA)

Layover in Seattle for 2h 39m

Mon Mar 24th 2025 Hawaiian Airlines · HA 6826 Depart at 11:29am from Seattle (SEA) Fly for 0h 56m Arrive at 12:25pm in Portland (PDX)
US$164

6:00am - 12:37pm
Tue Mar 25th 2025

6h 37m
Ontario (ONT) → Portland (PDX)

1 Stop

Tue Mar 25th 2025 United Airlines · UA 277 Depart at 6:00am from Ontario (ONT) Fly for 1h 29m Arrive at 7:29am in San Francisco (SFO)

Layover in San Francisco for 3h 11m

Tue Mar 25th 2025 United Airlines · UA 2115 Depart at 10:40am from San Francisco (SFO) Fly for 1h 57m Arrive at 12:37pm in Portland (PDX)
US$186

6:00am - 10:52am
Tue Mar 25th 2025

4h 52m
Ontario (ONT) → Portland (PDX)

1 Stop

Tue Mar 25th 2025 Hawaiian Airlines · HA 6288 Depart at 6:00am from Ontario (ONT) Fly for 2h 50m Arrive at 8:50am in Seattle (SEA)

Layover in Seattle for 1h 10m

Tue Mar 25th 2025 Hawaiian Airlines · HA 6835 Depart at 10:00am from Seattle (SEA) Fly for 0h 52m Arrive at 10:52am in Portland (PDX)
US$186

6:00am - 12:25pm
Wed Mar 26th 2025

6h 25m
Ontario (ONT) → Portland (PDX)

1 Stop

Wed Mar 26th 2025 Hawaiian Airlines · HA 6288 Depart at 6:00am from Ontario (ONT) Fly for 2h 50m Arrive at 8:50am in Seattle (SEA)

Layover in Seattle for 2h 39m

Wed Mar 26th 2025 Hawaiian Airlines · HA 6826 Depart at 11:29am from Seattle (SEA) Fly for 0h 56m Arrive at 12:25pm in Portland (PDX)
US$186

6:00am - 12:25pm
Mon Mar 24th 2025

6h 25m
Ontario (ONT) → Portland (PDX)

1 Stop

Mon Mar 24th 2025 Alaska Airlines · AS 1091 Depart at 6:00am from Ontario (ONT) Fly for 2h 50m Arrive at 8:50am in Seattle (SEA)

Layover in Seattle for 2h 39m

Mon Mar 24th 2025 Alaska Airlines · AS 1039 Depart at 11:29am from Seattle (SEA) Fly for 0h 56m Arrive at 12:25pm in Portland (PDX)
US$187

6:00am - 10:52am
Mon Mar 24th 2025

4h 52m
Ontario (ONT) → Portland (PDX)

1 Stop

Mon Mar 24th 2025 Alaska Airlines · AS 1091 Depart at 6:00am from Ontario (ONT) Fly for 2h 50m Arrive at 8:50am in Seattle (SEA)

Layover in Seattle for 1h 10m

Mon Mar 24th 2025 Alaska Airlines · AS 2213 Depart at 10:00am from Seattle (SEA) Fly for 0h 52m Arrive at 10:52am in Portland (PDX)
US$193

6:00am - 10:52am
Tue Mar 25th 2025

4h 52m
Ontario (ONT) → Portland (PDX)

1 Stop

Tue Mar 25th 2025 Alaska Airlines · AS 1091 Depart at 6:00am from Ontario (ONT) Fly for 2h 50m Arrive at 8:50am in Seattle (SEA)

Layover in Seattle for 1h 10m

Tue Mar 25th 2025 Alaska Airlines · AS 2213 Depart at 10:00am from Seattle (SEA) Fly for 0h 52m Arrive at 10:52am in Portland (PDX)
US$193

6:00am - 12:25pm
Wed Mar 26th 2025

6h 25m
Ontario (ONT) → Portland (PDX)

1 Stop

Wed Mar 26th 2025 Alaska Airlines · AS 1091 Depart at 6:00am from Ontario (ONT) Fly for 2h 50m Arrive at 8:50am in Seattle (SEA)

Layover in Seattle for 2h 39m

Wed Mar 26th 2025 Alaska Airlines · AS 1039 Depart at 11:29am from Seattle (SEA) Fly for 0h 56m Arrive at 12:25pm in Portland (PDX)
US$195

7:17pm - 11:55pm
Mon Mar 24th 2025

4h 38m
Ontario (ONT) → Portland (PDX)

1 Stop

Mon Mar 24th 2025 Hawaiian Airlines · HA 6107 Depart at 7:17pm from Ontario (ONT) Fly for 2h 43m Arrive at 10:00pm in Seattle (SEA)

Layover in Seattle for 0h 59m

Mon Mar 24th 2025 Hawaiian Airlines · HA 6674 Depart at 10:59pm from Seattle (SEA) Fly for 0h 56m Arrive at 11:55pm in Portland (PDX)
US$197

4:39pm - 12:37am
Mon Mar 24th 2025

7h 58m
Ontario (ONT) → Portland (PDX)

1 Stop

Mon Mar 24th 2025 Frontier Airlines · F9 2908 Depart at 4:39pm from Ontario (ONT) Fly for 2h 22m Arrive at 8:01pm in Denver (DEN)

Layover in Denver for 2h 44m

Mon Mar 24th 2025 Frontier Airlines · F9 2687 Depart at 10:45pm from Denver (DEN) Fly for 2h 52m Arrive at 12:37am in Portland (PDX)
US$207

6:00am - 12:32pm
Tue Mar 25th 2025

6h 32m
Ontario (ONT) → Portland (PDX)

1 Stop

Tue Mar 25th 2025 Hawaiian Airlines · HA 6288 Depart at 6:00am from Ontario (ONT) Fly for 2h 50m Arrive at 8:50am in Seattle (SEA)

Layover in Seattle for 2h 46m

Tue Mar 25th 2025 Hawaiian Airlines · HA 6826 Depart at 11:36am from Seattle (SEA) Fly for 0h 56m Arrive at 12:32pm in Portland (PDX)
US$215

6:00am - 12:32pm
Tue Mar 25th 2025

6h 32m
Ontario (ONT) → Portland (PDX)

1 Stop

Tue Mar 25th 2025 Alaska Airlines · AS 1091 Depart at 6:00am from Ontario (ONT) Fly for 2h 50m Arrive at 8:50am in Seattle (SEA)

Layover in Seattle for 2h 46m

Tue Mar 25th 2025 Alaska Airlines · AS 1039 Depart at 11:36am from Seattle (SEA) Fly for 0h 56m Arrive at 12:32pm in Portland (PDX)
US$217

7:17pm - 11:55pm
Mon Mar 24th 2025

4h 38m
Ontario (ONT) → Portland (PDX)

1 Stop

Mon Mar 24th 2025 Alaska Airlines · AS 1087 Depart at 7:17pm from Ontario (ONT) Fly for 2h 43m Arrive at 10:00pm in Seattle (SEA)

Layover in Seattle for 0h 59m

Mon Mar 24th 2025 Alaska Airlines · AS 957 Depart at 10:59pm from Seattle (SEA) Fly for 0h 56m Arrive at 11:55pm in Portland (PDX)
US$218

6:00am - 12:37pm
Wed Mar 26th 2025

6h 37m
Ontario (ONT) → Portland (PDX)

1 Stop

Wed Mar 26th 2025 United Airlines · UA 277 Depart at 6:00am from Ontario (ONT) Fly for 1h 29m Arrive at 7:29am in San Francisco (SFO)

Layover in San Francisco for 3h 11m

Wed Mar 26th 2025 United Airlines · UA 2115 Depart at 10:40am from San Francisco (SFO) Fly for 1h 57m Arrive at 12:37pm in Portland (PDX)
US$238

11:33am - 6:23pm
Mon Mar 24th 2025

6h 50m
Ontario (ONT) → Portland (PDX)

1 Stop

Mon Mar 24th 2025 Hawaiian Airlines · HA 6289 Depart at 11:33am from Ontario (ONT) Fly for 2h 49m Arrive at 2:22pm in Seattle (SEA)

Layover in Seattle for 3h 8m

Mon Mar 24th 2025 Hawaiian Airlines · HA 6676 Depart at 5:30pm from Seattle (SEA) Fly for 0h 53m Arrive at 6:23pm in Portland (PDX)
US$239

6:00am - 10:52am
Wed Mar 26th 2025

4h 52m
Ontario (ONT) → Portland (PDX)

1 Stop

Wed Mar 26th 2025 Hawaiian Airlines · HA 6288 Depart at 6:00am from Ontario (ONT) Fly for 2h 50m Arrive at 8:50am in Seattle (SEA)

Layover in Seattle for 1h 10m

Wed Mar 26th 2025 Hawaiian Airlines · HA 6835 Depart at 10:00am from Seattle (SEA) Fly for 0h 52m Arrive at 10:52am in Portland (PDX)
US$243

5:44pm - 8:07pm
Wed Mar 26th 2025

2h 23m
Ontario (ONT) → Portland (PDX)

Direct

Wed Mar 26th 2025 Hawaiian Airlines · HA 6286 Depart at 5:44pm from Ontario (ONT) Fly for 2h 23m Arrive at 8:07pm in Portland (PDX)
US$247

6:00am - 10:52am
Wed Mar 26th 2025

4h 52m
Ontario (ONT) → Portland (PDX)

1 Stop

Wed Mar 26th 2025 Alaska Airlines · AS 1091 Depart at 6:00am from Ontario (ONT) Fly for 2h 50m Arrive at 8:50am in Seattle (SEA)

Layover in Seattle for 1h 10m

Wed Mar 26th 2025 Alaska Airlines · AS 2213 Depart at 10:00am from Seattle (SEA) Fly for 0h 52m Arrive at 10:52am in Portland (PDX)
US$251

6:00am - 10:52am
Tue Mar 25th 2025

4h 52m
Ontario (ONT) → Portland (PDX)

1 Stop

Tue Mar 25th 2025 Alaska Airlines · AS 1091 Depart at 6:00am from Ontario (ONT) Fly for 2h 50m Arrive at 8:50am in Seattle (SEA)

Layover in Seattle for 1h 10m

Tue Mar 25th 2025 Hawaiian Airlines · HA 6835 Depart at 10:00am from Seattle (SEA) Fly for 0h 52m Arrive at 10:52am in Portland (PDX)
US$255

5:44pm - 8:07pm
Wed Mar 26th 2025

2h 23m
Ontario (ONT) → Portland (PDX)

Direct

Wed Mar 26th 2025 Alaska Airlines · AS 2202 Depart at 5:44pm from Ontario (ONT) Fly for 2h 23m Arrive at 8:07pm in Portland (PDX)

Sarah Belizaire

@sarahbb1

Have flexible travel plans or looking for alternative routes given the chaos? Check out all the connection possibilities via a super helpful site created by @ismaelyws flightlist.io thanks to @andy_travels for the recommendation #travel #flights

John Ford

@eyupitsjohn

There seem to be lots of sites launching at the moment that promise to find you cheap flights but not many have the professional finish of Flightlist by @ismaelyws #travel #flights

Roaming Sonaa

@roamingsonaa

For people wanting to maximize their trips, Flightlist is my newest travel hack for uncovering the coolest routes at irresistible prices. No stress, no annoying ads — just seamless flight booking with amazing functionality. It's designed for remote workers, backpackers, and people living abroad.

Read Sonaa's 7 Amazing Skyscanner Alternatives for Booking Travel

ANDY TRAVELS

@andy_travels

@ismaelyws Just tried out Flightlist for the first time. Really nice idea, well made, and just what I need at the moment 👍

Travel With Bender

@travelwitbender

Did you spot my recent article about how to score cheap one way flights? ✈️ FlightList is my new secret tool for discovering cheap routes, within a departure date range. Plus you can also search by country/region for departures & destinations. Powerful! 💪

Read Josh's Ultimate Guide To Find Cheap One Way Flights

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.

Read Wesley's My Best Cheap Flight Hacks (Why Pay More?)

Cheap Flights from Ontario to Portland (ONT to PDX)

Sarah Belizaire

John Ford

Roaming Sonaa

ANDY TRAVELS

Travel With Bender

Wesley Mergard

Latest Cheap Flight Searches

FlightList Blog

Flightlist Interviews 7 Travel Experts On Why They Book One Way Flights

Why I Built FlightList & Solved My Own Problem

About FlightList