$75+ Cheap flights from Ontario to Portland (ONT - PDX)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/23. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PDX
Apr 29 — May 61
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Portland with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Ontario to Portland are usually found in July or October, booked 85 days in advance, depart on a Friday or Tuesday and return on a Saturday
Cheap flight deals from Ontario to Portland
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to PortlandExplore the most affordable flight options available from Ontario to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 30, 2026.
Explore the most affordable flight options available from Ontario to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 30, 2026.
This Frontier deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1712:59 am
ONT
- PDX
1 stop10h 43m
Frontier
Tue 4/2112:38 pm
PDX
- ONT
1 stop11h 17m
Frontier
Deal found 3/27![Frontier logo]()
$160
This Expedia deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:33 pm
ONT
- PDX
1 stop18h 09m
Frontier
Tue 4/2812:38 pm
PDX
- ONT
1 stop11h 17m
Frontier
Deal found 3/29![Frontier logo]()
$161
This Booking.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/167:49 pm
ONT
- PDX
1 stop13h 10m
Frontier
Thu 4/2311:48 am
PDX
- ONT
1 stop19h 43m
Frontier
Deal found 3/29![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2012:59 am
ONT
- PDX
1 stop10h 53m
Frontier
Sat 4/2512:27 pm
PDX
- ONT
1 stop11h 28m
Frontier
Deal found 3/26![Frontier logo]()
$164
This Booking.com deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/167:49 pm
ONT
- PDX
1 stop13h 10m
Frontier
Sun 4/1912:45 pm
PDX
- ONT
1 stop21h 29m
Frontier
Deal found 3/26![Frontier logo]()
$172
This Delta deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/611:53 am
ONT
- PDX
1 stop6h 59m
Delta
Wed 5/275:30 am
PDX
- ONT
1 stop7h 05m
Delta
Deal found 3/25![Delta logo]()
$175
This Trip.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2311:47 am
ONT
- PDX
1 stop21h 12m
Frontier
Mon 4/2712:45 pm
PDX
- ONT
1 stop21h 59m
Frontier
Deal found 3/29![Frontier logo]()
$176
This Frontier deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1412:59 am
ONT
- PDX
1 stop10h 39m
Frontier
Thu 4/1612:45 pm
PDX
- ONT
1 stop6h 09m
Frontier
Deal found 3/27![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/15:33 pm
ONT
- PDX
1 stop18h 09m
Frontier
Sun 5/311:15 am
PDX
- ONT
1 stop20h 16m
Frontier
Deal found 3/29![Frontier logo]()
$182
This Booking.com deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:33 pm
ONT
- PDX
1 stop18h 09m
Frontier
Sun 4/2611:15 am
PDX
- ONT
1 stop20h 16m
Frontier
Deal found 3/28![Frontier logo]()
$183
Best flights from Ontario to PortlandDiscover carefully curated flight deals from Ontario to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 30, 2026.
Discover carefully curated flight deals from Ontario to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 30, 2026.
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/285:05 pm
ONT
- PDX
1 stop6h 48m
Delta
Thu 4/306:05 pm
PDX
- ONT
1 stop4h 32m
Delta
Deal found 3/26![Delta logo]()
$191
This Alaska Airlines deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/97:00 am
ONT
- PDX
Nonstop2h 24m
Alaska Airlines
Wed 5/138:00 am
PDX
- ONT
Nonstop2h 21m
Alaska Airlines
Deal found 3/26![Alaska Airlines logo]()
$197
This Southwest deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/84:25 pm
ONT
- PDX
1 stop5h 45m
Southwest
Mon 5/116:10 am
PDX
- ONT
2 stops8h 50m
Southwest
Deal found 3/30![Southwest logo]()
$312
This Alaska Airlines deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:00 am
ONT
- PDX
Nonstop2h 24m
Alaska Airlines
Mon 5/49:30 pm
PDX
- ONT
Nonstop2h 18m
Alaska Airlines
Deal found 3/29![Alaska Airlines logo]()
$207
This KAYAK deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:00 am
ONT
- PDX
1 stop7h 53m
Delta
Wed 4/296:05 pm
PDX
- ONT
1 stop4h 32m
Delta
Deal found 3/25![Delta logo]()
$243
This Alaska Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:00 am
ONT
- PDX
Nonstop2h 24m
Alaska Airlines
Sat 5/27:30 am
PDX
- ONT
1 stop4h 38m
Alaska Airlines
Deal found 3/27![Alaska Airlines logo]()
$250
This Delta deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/2311:57 am
ONT
- PDX
1 stop5h 13m
Delta
Mon 6/295:30 am
PDX
- ONT
1 stop7h 38m
Delta
Deal found 3/29![Delta logo]()
$259
This Alaska Airlines deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/15:56 pm
ONT
- PDX
Nonstop2h 29m
Alaska Airlines
Sun 5/39:30 pm
PDX
- ONT
Nonstop2h 18m
Alaska Airlines
Deal found 3/26![Alaska Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/209:50 am
ONT
- PDX
1 stop6h 10m
Delta
Mon 5/255:30 am
PDX
- ONT
1 stop5h 42m
Delta
Deal found 3/28![Delta logo]()
$259
This Alaska Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/95:57 pm
ONT
- PDX
Nonstop2h 24m
Alaska Airlines
Fri 6/199:30 pm
PDX
- ONT
Nonstop2h 24m
Alaska Airlines
Deal found 3/25![Alaska Airlines logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/247:00 am
ONT
- PDX
Nonstop2h 24m
Alaska Airlines
Sun 4/267:30 am
PDX
- ONT
1 stop4h 38m
Alaska Airlines
Deal found 3/25![Alaska Airlines logo]()
$307
This Alaska Airlines deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/277:59 pm
ONT
- PDX
1 stop23h 45m
Alaska Airlines
Sat 5/29:30 pm
PDX
- ONT
Nonstop2h 18m
Alaska Airlines
Deal found 3/29![Alaska Airlines logo]()
$310
Last-minute flights from Ontario to PortlandDiscover last-minute flight deals from Ontario to Portland. Data last updated March 30, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Portland. Data last updated March 30, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1412:59 am
ONT
- PDX
1 stop10h 39m
Frontier
Thu 4/1612:45 pm
PDX
- ONT
1 stop6h 09m
Frontier
Deal found 3/27![Frontier logo]()
$180
This Booking.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/167:49 pm
ONT
- PDX
1 stop13h 10m
Frontier
Thu 4/2311:48 am
PDX
- ONT
1 stop19h 43m
Frontier
Deal found 3/29![Frontier logo]()
$162
This Booking.com deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/167:49 pm
ONT
- PDX
1 stop13h 10m
Frontier
Sun 4/1912:45 pm
PDX
- ONT
1 stop21h 29m
Frontier
Deal found 3/26![Frontier logo]()
$172
This Frontier deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1712:59 am
ONT
- PDX
1 stop10h 43m
Frontier
Tue 4/2112:38 pm
PDX
- ONT
1 stop11h 17m
Frontier
Deal found 3/27![Frontier logo]()
$160
This Booking.com deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/175:33 pm
ONT
- PDX
1 stop18h 09m
Frontier
Sun 4/1912:45 pm
PDX
- ONT
1 stop21h 29m
Frontier
Deal found 3/26![Frontier logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2012:59 am
ONT
- PDX
1 stop10h 53m
Frontier
Sat 4/2512:27 pm
PDX
- ONT
1 stop11h 28m
Frontier
Deal found 3/26![Frontier logo]()
$164
This Trip.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2311:47 am
ONT
- PDX
1 stop21h 12m
Frontier
Mon 4/2712:45 pm
PDX
- ONT
1 stop21h 59m
Frontier
Deal found 3/29![Frontier logo]()
$176
This Expedia deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:33 pm
ONT
- PDX
1 stop18h 09m
Frontier
Tue 4/2812:38 pm
PDX
- ONT
1 stop11h 17m
Frontier
Deal found 3/29![Frontier logo]()
$161
This Booking.com deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:33 pm
ONT
- PDX
1 stop18h 09m
Frontier
Sun 4/2611:15 am
PDX
- ONT
1 stop20h 16m
Frontier
Deal found 3/28![Frontier logo]()
$183
This Expedia deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2712:59 am
ONT
- PDX
1 stop10h 53m
Multiple Airlines
Tue 5/58:45 am
PDX
- ONT
1 stop5h 47m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$184
One-way flights from Ontario to PortlandSearch for one-way flight options from Ontario to Portland. Find affordable one-way fares based on user searches. Data last updated March 30, 2026.
Search for one-way flight options from Ontario to Portland. Find affordable one-way fares based on user searches. Data last updated March 30, 2026.
This Super.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2311:47 am
ONT
- PDX
1 stop21h 12m
Frontier
Deal found 3/30![Frontier logo]()
$75
This Frontier deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2512:59 am
ONT
- PDX
1 stop9h 21m
Frontier
Deal found 3/29![Frontier logo]()
$76
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/105:24 pm
ONT
- PDX
1 stop6h 22m
Delta
Deal found 3/26![Delta logo]()
$88
This Super.com deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/911:00 am
ONT
- PDX
1 stop5h 24m
Frontier
Deal found 3/25![Frontier logo]()
$89
This Frontier deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/74:04 pm
ONT
- PDX
1 stop4h 47m
Frontier
Deal found 3/25![Frontier logo]()
$90
This Super.com deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1512:59 am
ONT
- PDX
1 stop10h 04m
Frontier
Deal found 3/28![Frontier logo]()
$95
This Frontier deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1312:59 am
ONT
- PDX
1 stop12h 03m
Frontier
Deal found 3/27![Frontier logo]()
$96
This Expedia deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:00 am
ONT
- PDX
1 stop10h 46m
Frontier
Deal found 3/25![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:59 pm
ONT
- PDX
2 stops14h 53m
Frontier
Deal found 3/26![Frontier logo]()
$102
This United Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/146:59 pm
ONT
- PDX
1 stop6h 00m
United Airlines
Deal found 3/25![United Airlines logo]()
$104
This iWofly deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/810:03 pm
ONT
- PDX
1 stop18h 21m
Frontier
Deal found 3/30![Frontier logo]()
$109
This Super.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/110:50 am
ONT
- PDX
1 stop5h 56m
Frontier
Deal found 3/27![Frontier logo]()
$110
Find flight deals from Ontario to Portland
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Portland (PDX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $160 (CheapOair) |
One-way from | $75 (Super.com) |
Popular in | March |
Cheapest in | July |
Average price | $297 |
Good round-trip deal | $238 or less |
Good one-way deal | $198 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Portland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 30, 2026.
Use the filters below to find and compare flights from Ontario to Portland that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Tue 4/28
5:05 pm-11:53 pm
1 stop6h 48m
Portland
Thu 4/30
6:05 pm-10:37 pm
1 stop4h 32m
$191
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Sat 5/9
7:00 am-9:24 am
Nonstop2h 24m
Portland
Wed 5/13
8:00 am-10:21 am
Nonstop2h 21m
$197
Quickest round-trip
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Sat 5/2
7:00 am-9:24 am
Nonstop2h 24m
Portland
Mon 5/4
9:30 pm-11:48 pm
Nonstop2h 18m
$207
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Tue 4/28
7:00 am-2:53 pm
1 stop7h 53m
Portland
Wed 4/29
6:05 pm-10:37 pm
1 stop4h 32m
$243
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Tue 4/28
7:00 am-9:24 am
Nonstop2h 24m
Portland
Sat 5/2
7:30 am-12:08 pm
1 stop4h 38m
$250
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Fri 5/1
5:56 pm-8:25 pm
Nonstop2h 29m
Portland
Sun 5/3
9:30 pm-11:48 pm
Nonstop2h 18m
$257
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Tue 6/23
11:57 am-5:10 pm
1 stop5h 13m
Portland
Mon 6/29
5:30 am-1:08 pm
1 stop7h 38m
$259
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Wed 5/20
9:50 am-4:00 pm
1 stop6h 10m
Portland
Mon 5/25
5:30 am-11:12 am
1 stop5h 42m
$259
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Tue 6/9
5:57 pm-8:21 pm
Nonstop2h 24m
Portland
Fri 6/19
9:30 pm-11:54 pm
Nonstop2h 24m
$297
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Fri 4/24
7:00 am-9:24 am
Nonstop2h 24m
Portland
Sun 4/26
7:30 am-12:08 pm
1 stop4h 38m
$307
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from Ontario to Portland
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Portland in March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Portland flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Portland flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Portland flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Portland flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Portland flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Portland
Have a flexible travel schedule? Discover the best time to fly to Portland from Ontario with our price prediction graph.
ONT-PDX
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Portland
Prices
Airlines
How far ahead should I book a flight from Ontario to Portland?
Use this chart to determine the optimal time to book a round-trip flight from Ontario to Portland. Price data was last updated on March 13, 2026.
The price you pay for your flight from Ontario to Portland may vary depending on when you book. For the best chance of a lower fare, look to book 85 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Ontario to Portland?
Currently, October is the cheapest month in which you can book a flight from Ontario to Portland (average of $63). Flying from Ontario to Portland in February is currently the most expensive (average of $115). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from ONT to PDX?
Find hourly flight availability from Ontario to Portland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 30, 2026.
It’s typically best to fly out from Ontario to Portland at noon. Doing so could potentially save you 40% on the flight price compared to flying in the evening, which is usually more expensive.
What is the cheapest day to fly from Ontario to Portland?
Use this chart to determine the cheapest time to fly round-trip from Ontario to Portland. Price data was last updated on March 28, 2026.
Travelers seeking maximum savings on their Ontario to Portland flight should consider departing on Tuesday at noon when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
The best insider tips for Ontario to Portland flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Ontario to Portland trip
Our travel experts
Reviews of airlines servicing Portland
Get insights into the airlines that provide service to Portland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portland. Reviews last updated March 30, 2026.
Read reviews from past customers who have flown Southwest,Alaska Airlines, andDelta from Ontario to Portland. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Related info for your journey
Find useful and relevant information for your journey from Ontario to Portland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Portland?
Book flights to Portland if you plan to visit one of these locationsBeaverton
Seaside
Vancouver
Lincoln City
Longview
Lake Oswego
Hillsboro
Clackamas
Troutdale
Cannon Beach
Long Beach
McMinnville
Tigard
The Dalles
Wilsonville
Depoe Bay
Stevenson
Tillamook
Astoria
Pacific City
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Search flights from Ontario to Portland by cabin class
Find flights from Ontario to Portland, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Portland flights
Browse other Ontario and Portland flight options. Last updated on March 30, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on March 30, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Portland
Explore flights to Portland departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 30, 2026.
Top 6 airlines flying from Ontario to Portland
Discover the top 6 airlines that operate flights from Ontario to Portland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$76 | Average$159 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$78 | Average$282 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$88 | Average$221 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$157 | Average$278 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$157 | Average$268 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$158 | Average$265 | FlexibilityNo cancel fee | On-time63% |