$110+ 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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PDX
Sep 9 — Sep 161
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 October or September, booked 36 days in advance, depart on a Friday or Sunday and return on a Friday
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 August 10, 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 August 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Wed 10/146:00 am -
1 stop10h 35m
Mon 10/199:34 pm -
1 stop12h 47m
Deal found 8/7![Frontier logo]()
$248
This Super.com deal was found by Cheapflights users on 8/6. 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 8/273:40 pm -
1 stop25h 41m
Thu 9/31:47 pm -
1 stop18h 16m
Deal found 8/6![Frontier logo]()
$249
This American Airlines deal was found by Cheapflights users on 8/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/306:15 am -
1 stop7h 37m
Fri 9/45:15 am -
1 stop6h 48m
Deal found 8/10![American Airlines logo]()
$250
This Super.com deal was found by Cheapflights users on 8/7. 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 9/178:24 pm -
1 stop15h 30m
Sun 9/2012:24 pm -
1 stop18h 40m
Deal found 8/7![Frontier logo]()
$251
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Thu 8/2710:49 am -
1 stop6h 22m
Tue 9/15:56 pm -
2 stops20h 31m
Deal found 8/6![Frontier logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Sat 8/296:00 am -
1 stop11h 11m
Tue 9/15:56 pm -
2 stops20h 31m
Deal found 8/6![Frontier logo]()
$254
This Mytrip deal was found by Cheapflights users on 8/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/126:02 am -
1 stop5h 34m
Mon 9/1412:39 pm -
1 stop20h 30m
Deal found 8/6![Multiple Airlines logo]()
$255
This Southwest deal was found by Cheapflights users on 8/10. 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.
Thu 8/275:45 pm -
1 stop5h 20m
Tue 9/16:35 am -
2 stops6h 05m
Deal found 8/10![Southwest logo]()
$256
This Priceline deal was found by Cheapflights users on 8/6. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/910:47 am -
Nonstop2h 17m
Sat 9/127:18 am -
Nonstop2h 33m
Deal found 8/6![Alaska Airlines logo]()
$257
This Frontier deal was found by Cheapflights users on 8/8. 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 8/296:00 am -
1 stop11h 11m
Mon 8/3112:20 pm -
1 stop11h 30m
Deal found 8/8![Frontier logo]()
$258
This Super.com deal was found by Cheapflights users on 8/7. 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 8/2410:49 am -
1 stop6h 22m
Tue 9/15:56 pm -
1 stop5h 54m
Deal found 8/7![Frontier logo]()
$259
This Frontier deal was found by Cheapflights users on 8/9. 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 10/162:58 pm -
1 stop5h 41m
Tue 10/205:35 pm -
1 stop6h 20m
Deal found 8/9![Frontier logo]()
$260
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 August 10, 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 August 10, 2026.
This Alaska Airlines deal was found by Cheapflights users on 8/7. 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 9/2610:47 am -
Nonstop2h 17m
Sat 10/38:28 am -
Nonstop2h 21m
Deal found 8/7![Alaska Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 8/6. 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.
Fri 8/215:05 pm -
1 stop6h 39m
Mon 8/243:25 pm -
1 stop7h 20m
Deal found 8/6![Delta logo]()
$277
This Southwest deal was found by Cheapflights users on 8/9. 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.
Sun 9/612:15 pm -
1 stop5h 25m
Sun 9/137:20 am -
1 stop5h 50m
Deal found 8/9![Southwest logo]()
$294
This United Airlines deal was found by Cheapflights users on 8/7. 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.
Fri 8/147:13 pm -
1 stop5h 24m
Sat 8/155:30 am -
1 stop6h 42m
Deal found 8/7![United Airlines logo]()
$337
This Alaska Airlines deal was found by Cheapflights users on 8/6. 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.
Wed 9/1612:12 pm -
1 stop4h 38m
Mon 9/212:53 pm -
Nonstop2h 25m
Deal found 8/6![Alaska Airlines logo]()
$302
This Southwest deal was found by Cheapflights users on 8/5. 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.
Wed 9/29:40 am -
2 stops5h 45m
Wed 9/95:50 am -
2 stops7h 45m
Deal found 8/5![Southwest logo]()
$304
This Delta deal was found by Cheapflights users on 8/6. 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.
Sat 8/155:05 pm -
1 stop5h 33m
Sun 8/235:30 am -
1 stop5h 46m
Deal found 8/6![Delta logo]()
$307
This Alaska Airlines deal was found by Cheapflights users on 8/7. 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.
Thu 10/87:25 am -
Nonstop2h 20m
Sun 10/119:34 pm -
Nonstop2h 20m
Deal found 8/7![Alaska Airlines logo]()
$327
This Delta deal was found by Cheapflights users on 8/5. 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.
Fri 8/145:05 pm -
1 stop6h 39m
Mon 8/175:30 am -
1 stop5h 46m
Deal found 8/5![Delta logo]()
$337
This Southwest deal was found by Cheapflights users on 8/6. 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.
Tue 8/187:45 am -
2 stops7h 40m
Mon 8/245:00 am -
2 stops8h 25m
Deal found 8/6![Southwest logo]()
$347
This Alaska Airlines deal was found by Cheapflights users on 8/9. 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.
Thu 9/37:12 am -
Nonstop2h 18m
Sun 9/67:18 am -
Nonstop2h 33m
Deal found 8/9![Alaska Airlines logo]()
$327
Last-minute flights from Ontario to PortlandDiscover last-minute flight deals from Ontario to Portland. Data last updated August 10, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Portland. Data last updated August 10, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 8/7. 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 8/2410:49 am -
1 stop6h 22m
Tue 9/15:56 pm -
1 stop5h 54m
Deal found 8/7![Frontier logo]()
$259
This Super.com deal was found by Cheapflights users on 8/6. 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 8/273:40 pm -
1 stop25h 41m
Thu 9/31:47 pm -
1 stop18h 16m
Deal found 8/6![Frontier logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Thu 8/2710:49 am -
1 stop6h 22m
Tue 9/15:56 pm -
2 stops20h 31m
Deal found 8/6![Frontier logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Sat 8/296:00 am -
1 stop11h 11m
Tue 9/15:56 pm -
2 stops20h 31m
Deal found 8/6![Frontier logo]()
$254
This Frontier deal was found by Cheapflights users on 8/8. 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 8/296:00 am -
1 stop11h 11m
Mon 8/3112:20 pm -
1 stop11h 30m
Deal found 8/8![Frontier logo]()
$258
This Expedia deal was found by Cheapflights users on 8/7. 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 8/3111:50 am -
1 stop5h 31m
Fri 9/411:40 am -
1 stop9h 47m
Deal found 8/7![Frontier logo]()
$260
This Expedia deal was found by Cheapflights users on 8/5. 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.
Thu 9/310:49 am -
1 stop6h 22m
Wed 9/910:49 am -
1 stop5h 21m
Deal found 8/5![Multiple Airlines logo]()
$250
This Frontier deal was found by Cheapflights users on 8/7. 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.
Sun 9/66:00 am -
1 stop11h 11m
Sun 9/1312:38 pm -
1 stop11h 09m
Deal found 8/7![Frontier logo]()
$262
This Priceline deal was found by Cheapflights users on 8/6. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/910:47 am -
Nonstop2h 17m
Sat 9/127:18 am -
Nonstop2h 33m
Deal found 8/6![Alaska Airlines logo]()
$257
This Mytrip deal was found by Cheapflights users on 8/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/126:02 am -
1 stop5h 34m
Mon 9/1412:39 pm -
1 stop20h 30m
Deal found 8/6![Multiple Airlines logo]()
$255
This Super.com deal was found by Cheapflights users on 8/7. 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 9/178:24 pm -
1 stop15h 30m
Sun 9/2012:24 pm -
1 stop18h 40m
Deal found 8/7![Frontier logo]()
$251
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 August 10, 2026.
Search for one-way flight options from Ontario to Portland. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
This Super.com deal was found by Cheapflights users on 8/5. 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 10/82:58 pm -
1 stop5h 41m
Deal found 8/5![Frontier logo]()
$110
This Frontier deal was found by Cheapflights users on 8/6. 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 10/122:58 pm -
1 stop5h 41m
Deal found 8/6![Frontier logo]()
$111
This Southwest deal was found by Cheapflights users on 8/9. 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.
Mon 10/126:55 pm -
1 stop6h 25m
Deal found 8/9![Southwest logo]()
$112
This Super.com deal was found by Cheapflights users on 8/6. 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 8/273:40 pm -
1 stop25h 41m
Deal found 8/6![Frontier logo]()
$115
This Booking.com deal was found by Cheapflights users on 8/6. 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.
Sat 9/1911:45 am -
1 stop23h 58m
Deal found 8/6![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Thu 10/112:07 pm -
2 stops23h 47m
Deal found 8/8![Frontier logo]()
$118
This WAYA deal was found by Cheapflights users on 8/8. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:07 pm -
1 stop4h 43m
Deal found 8/8![Multiple Airlines logo]()
$119
This FlightHub deal was found by Cheapflights users on 8/6. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2311:45 am -
1 stop23h 58m
Deal found 8/6![Frontier logo]()
$120
This Trip.com deal was found by Cheapflights users on 8/5. 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.
Wed 11/42:35 pm -
1 stop26h 00m
Deal found 8/5![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Wed 9/23:13 pm -
2 stops21h 39m
Deal found 8/6![Frontier logo]()
$123
This Super.com deal was found by Cheapflights users on 8/6. 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 8/3111:50 am -
1 stop5h 31m
Deal found 8/6![Frontier logo]()
$127
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 August 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $248 (Kiwi.com) |
One-way from | $110 (Super.com) |
Popular in | July |
Cheapest in | October |
Average price | $277 |
Good round-trip deal | $297 or less |
Good one-way deal | $178 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 August 10, 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
Quickest round-trip
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Sat 9/26
10:47 am-1:04 pm
Nonstop2h 17m
Portland
Sat 10/3
8:28 am-10:49 am
Nonstop2h 21m
$257
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Fri 8/21
5:05 pm-11:44 pm
1 stop6h 39m
Portland
Mon 8/24
3:25 pm-10:45 pm
1 stop7h 20m
$277
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Sun 9/6
12:15 pm-5:40 pm
1 stop5h 25m
Portland
Sun 9/13
7:20 am-1:10 pm
1 stop5h 50m
$294
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Wed 9/16
12:12 pm-4:50 pm
1 stop4h 38m
Portland
Mon 9/21
2:53 pm-5:18 pm
Nonstop2h 25m
$302
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Wed 9/2
9:40 am-3:25 pm
2 stops5h 45m
Portland
Wed 9/9
5:50 am-1:35 pm
2 stops7h 45m
$304
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Sat 8/15
5:05 pm-10:38 pm
1 stop5h 33m
Portland
Sun 8/23
5:30 am-11:16 am
1 stop5h 46m
$307
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Thu 10/8
7:25 am-9:45 am
Nonstop2h 20m
Portland
Sun 10/11
9:34 pm-11:54 pm
Nonstop2h 20m
$327
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Thu 9/3
7:12 am-9:30 am
Nonstop2h 18m
Portland
Sun 9/6
7:18 am-9:51 am
Nonstop2h 33m
$327
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Fri 8/14
7:13 pm-12:37 am
1 stop5h 24m
Portland
Sat 8/15
5:30 am-12:12 pm
1 stop6h 42m
$337
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Fri 8/14
5:05 pm-11:44 pm
1 stop6h 39m
Portland
Mon 8/17
5:30 am-11:16 am
1 stop5h 46m
$337
Showing 1-10 of 21 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 August.
| 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 Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy1 star | 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
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How far ahead should I book a flight from Ontario to Portland?
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 35 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 $202). Flying from Ontario to Portland in July is currently the most expensive (average of $337). 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 August 10, 2026.
It’s typically best to fly out from Ontario to Portland in the evening. Doing so could potentially save you 69% on the flight price compared to flying in the morning, 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 August 8, 2026.
Travelers seeking maximum savings on their Ontario to Portland flight should consider departing on Friday evenings when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
What’s the top layover airport for flights from Ontario to Portland?
Share of 1-stop round-trip flights from Ontario to Portland chosen by Cheapflights users in the past 12 months, using the same layover each way.
Denver (DEN) – chosen by Cheapflights users on 67% of 1-stop itineraries from Ontario to Portland on Cheapflights.
What’s the cheapest layover airport for flights from Ontario to Portland?
Average round-trip fare for 1-stop flights from Ontario to Portland, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $207.
What’s the fastest layover option from Ontario to Portland?
Shortest average travel time for 1-stop one-way flights from Ontario to Portland, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Sacramento (SMF) have the shortest average one-way travel time for 1-stop routes: 3h 30m.
Which airport typically offers the quickest layover for flights from Ontario to Portland?
Average layover duration for 1-stop one-way flights from Ontario to Portland, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Sacramento (SMF) offer the fastest connection on this route, with an average layover time of 1h 10m.
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 August 10, 2026.
Read reviews from past customers who have flown Southwest,Alaska Airlines, andHawaiian Airlines 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.
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
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
Lincoln City
Durham
Longview
Lake Oswego
Hillsboro
Kelso
Clackamas
Troutdale
Vancouver
Cannon Beach
McMinnville
The Dalles
Wilsonville
Stevenson
Tillamook
Astoria
Gresham
Silverton
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Ontario and Portland flights
Browse other Ontario and Portland flight options. Last updated on August 10, 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 August 10, 2026.
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Other flights to Portland
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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 August 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$64 | Average$177 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$78 | Average$276 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$88 | Average$278 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$157 | Average$301 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$166 | Average$268 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$186 | Average$281 | FlexibilityNo cancel fee | On-time63% |