$99+ Cheap flights from Ontario (ONT) to Oregon
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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PDX
Aug 27 — Sep 31
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Oregon 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
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Cheapest flights from Ontario to OregonExplore the most affordable flight options available from Ontario to Oregon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2026.
Explore the most affordable flight options available from Ontario to Oregon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2026.
This Traveloka deal was found by Cheapflights users on 7/27. 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 Traveloka is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/94:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Wed 9/163:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$175
This Alaska Airlines deal was found by Cheapflights users on 7/26. 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 8/294:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 9/13:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$177
This SmartFares deal was found by Cheapflights users on 7/26. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/294:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sun 8/306:00 am
BOI
- ONT
1 stop4h 51m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 8/1710:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Thu 8/2012:24 pm
BOI
- ONT
1 stop12h 26m
Frontier
Deal found 7/23![Frontier logo]()
$187
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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.
Sat 10/172:13 pm
ONT
- BOI
1 stop4h 53m
Alaska Airlines
Tue 10/202:51 pm
BOI
- ONT
Nonstop2h 11m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$197
This Southwest deal was found by Cheapflights users on 7/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/88:35 am
ONT
- BOI
1 stop4h 05m
Southwest
Tue 9/153:30 pm
BOI
- ONT
2 stops6h 30m
Southwest
Deal found 7/26![Southwest logo]()
$202
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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.
Fri 9/254:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sun 9/276:00 am
BOI
- ONT
1 stop4h 51m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$207
This Southwest deal was found by Cheapflights users on 7/24. 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 8/252:10 pm
ONT
- BOI
2 stops7h 05m
Southwest
Thu 8/279:05 am
BOI
- ONT
1 stop3h 45m
Southwest
Deal found 7/24![Southwest logo]()
$208
This Southwest deal was found by Cheapflights users on 7/24. 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 8/113:00 pm
ONT
- EUG
1 stop6h 10m
Southwest
Tue 8/185:40 am
EUG
- ONT
1 stop4h 35m
Southwest
Deal found 7/24![Southwest logo]()
$237
This Southwest deal was found by Cheapflights users on 7/23. 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 8/145:40 am
ONT
- EUG
1 stop6h 00m
Southwest
Fri 8/211:15 pm
EUG
- ONT
2 stops8h 00m
Southwest
Deal found 7/23![Southwest logo]()
$242
This Delta deal was found by Cheapflights users on 7/24. 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 8/76:20 am
ONT
- EUG
1 stop6h 44m
Delta
Mon 8/176:10 am
EUG
- ONT
1 stop5h 06m
Delta
Deal found 7/24![Delta logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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.
Sat 9/197:12 am
ONT
- PDX
Nonstop2h 18m
Alaska Airlines
Wed 9/232:53 pm
PDX
- ONT
Nonstop2h 25m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$247
Best flights from Ontario to OregonDiscover carefully curated flight deals from Ontario to Oregon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 28, 2026.
Discover carefully curated flight deals from Ontario to Oregon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 28, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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.
Sat 8/297:12 am
ONT
- BOI
1 stop5h 09m
Alaska Airlines
Tue 9/13:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$197
This Southwest deal was found by Cheapflights users on 7/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/264:45 pm
ONT
- EUG
1 stop4h 25m
Southwest
Sat 8/2911:45 am
EUG
- ONT
2 stops6h 35m
Southwest
Deal found 7/27![Southwest logo]()
$242
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 9/249:12 pm
ONT
- MFR
1 stop11h 20m
Multiple Airlines
Mon 9/283:40 pm
MFR
- ONT
1 stop5h 14m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$252
This Delta deal was found by Cheapflights users on 7/23. 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.
Thu 11/1211:55 am
ONT
- PDX
1 stop8h 03m
Delta
Sun 11/157:14 pm
PDX
- ONT
1 stop4h 34m
Delta
Deal found 7/23![Delta logo]()
$257
This United Airlines deal was found by Cheapflights users on 7/24. 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.
Sat 9/51:56 pm
ONT
- RDM
1 stop4h 32m
United Airlines
Sat 9/121:52 pm
RDM
- ONT
1 stop4h 19m
United Airlines
Deal found 7/24![United Airlines logo]()
$269
This Alaska Airlines deal was found by Cheapflights users on 7/25. 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 9/254:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sun 9/273:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/25![Alaska Airlines logo]()
$237
This Southwest deal was found by Cheapflights users on 7/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:30 am
ONT
- PDX
1 stop3h 45m
Southwest
Tue 9/297:50 am
PDX
- ONT
1 stop5h 45m
Southwest
Deal found 7/27![Southwest logo]()
$252
This Delta deal was found by Cheapflights users on 7/23. 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 8/1811:56 am
ONT
- PDX
1 stop7h 48m
Delta
Sat 8/225:54 pm
PDX
- ONT
1 stop4h 51m
Delta
Deal found 7/23![Delta logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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.
Sat 9/197:12 am
ONT
- PDX
Nonstop2h 18m
Alaska Airlines
Wed 9/232:53 pm
PDX
- ONT
Nonstop2h 25m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$247
This Southwest deal was found by Cheapflights users on 7/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:45 am
ONT
- BOI
2 stops6h 55m
Southwest
Wed 9/163:40 pm
BOI
- ONT
2 stops6h 20m
Southwest
Deal found 7/26![Southwest logo]()
$252
This Delta deal was found by Cheapflights users on 7/23. 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.
Thu 8/206:20 am
ONT
- PDX
1 stop5h 25m
Delta
Thu 8/275:30 am
PDX
- ONT
1 stop5h 46m
Delta
Deal found 7/23![Delta logo]()
$257
This Southwest deal was found by Cheapflights users on 7/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/122:40 pm
ONT
- PDX
1 stop5h 10m
Southwest
Mon 8/175:15 am
PDX
- ONT
1 stop5h 05m
Southwest
Deal found 7/27![Southwest logo]()
$257
This Delta deal was found by Cheapflights users on 7/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:00 pm
ONT
- PDX
1 stop4h 31m
Delta
Sun 9/135:49 pm
PDX
- ONT
1 stop4h 51m
Delta
Deal found 7/27![Delta logo]()
$257
This United Airlines deal was found by Cheapflights users on 7/24. 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 9/185:00 am
ONT
- OTH
1 stop8h 25m
United Airlines
Mon 9/212:06 pm
OTH
- ONT
1 stop4h 05m
United Airlines
Deal found 7/24![United Airlines logo]()
$331
This Southwest deal was found by Cheapflights users on 7/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:10 am
ONT
- PDX
1 stop3h 50m
Southwest
Wed 8/1911:35 am
PDX
- ONT
1 stop6h 15m
Southwest
Deal found 7/26![Southwest logo]()
$257
This Delta deal was found by Cheapflights users on 7/23. 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 8/211:06 pm
ONT
- BOI
1 stop3h 49m
Delta
Sat 8/225:15 pm
BOI
- ONT
1 stop6h 08m
Delta
Deal found 7/23![Delta logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 7/23. 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 8/194:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Wed 8/266:23 am
BOI
- ONT
1 stop5h 41m
Alaska Airlines
Deal found 7/23![Alaska Airlines logo]()
$287
This United Airlines deal was found by Cheapflights users on 7/23. 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.
Sat 8/221:56 pm
ONT
- MFR
1 stop4h 12m
United Airlines
Mon 8/242:07 pm
MFR
- ONT
1 stop4h 04m
United Airlines
Deal found 7/23![United Airlines logo]()
$337
This Southwest deal was found by Cheapflights users on 7/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:15 pm
ONT
- PDX
1 stop7h 15m
Southwest
Mon 10/195:10 am
PDX
- ONT
1 stop5h 10m
Southwest
Deal found 7/26![Southwest logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 7/23. 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 8/266:02 am
ONT
- RDM
1 stop6h 32m
Alaska Airlines
Sat 8/294:02 pm
RDM
- ONT
1 stop4h 22m
Alaska Airlines
Deal found 7/23![Alaska Airlines logo]()
$289
This Delta deal was found by Cheapflights users on 7/23. 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 10/25:15 pm
ONT
- PDX
1 stop6h 25m
Delta
Wed 10/75:30 am
PDX
- ONT
1 stop5h 46m
Delta
Deal found 7/23![Delta logo]()
$263
This United Airlines deal was found by Cheapflights users on 7/25. 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.
Tue 9/16:08 am
ONT
- MFR
1 stop5h 46m
United Airlines
Tue 9/86:00 am
MFR
- ONT
1 stop6h 12m
United Airlines
Deal found 7/25![United Airlines logo]()
$347
This Southwest deal was found by Cheapflights users on 7/24. 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 8/284:10 pm
ONT
- PDX
1 stop6h 00m
Southwest
Sat 8/2911:20 am
PDX
- ONT
2 stops8h 45m
Southwest
Deal found 7/24![Southwest logo]()
$262
This Alaska Airlines deal was found by Cheapflights users on 7/24. 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 9/1910:47 am
ONT
- EUG
1 stop4h 39m
Alaska Airlines
Wed 9/235:25 am
EUG
- ONT
1 stop4h 26m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$289
This Delta deal was found by Cheapflights users on 7/23. 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 8/2611:56 am
ONT
- RDM
1 stop6h 49m
Delta
Sat 8/295:10 am
RDM
- ONT
1 stop7h 06m
Delta
Deal found 7/23![Delta logo]()
$269
This Alaska Airlines deal was found by Cheapflights users on 7/24. 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 9/17:12 am
ONT
- EUG
1 stop5h 36m
Alaska Airlines
Tue 9/87:35 pm
EUG
- ONT
1 stop15h 41m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$289
This Southwest deal was found by Cheapflights users on 7/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/193:35 pm
ONT
- BOI
1 stop6h 45m
Southwest
Mon 8/246:00 am
BOI
- ONT
1 stop6h 25m
Southwest
Deal found 7/25![Southwest logo]()
$267
This Delta deal was found by Cheapflights users on 7/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/146:20 am
ONT
- RDM
1 stop6h 52m
Delta
Wed 8/196:15 am
RDM
- ONT
1 stop5h 01m
Delta
Deal found 7/27![Delta logo]()
$269
This Booking.com deal was found by Cheapflights users on 7/23. 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.
Tue 8/253:07 pm
ONT
- EUG
1 stop8h 46m
Alaska Airlines
Sat 8/2912:40 pm
EUG
- ONT
1 stop4h 30m
Alaska Airlines
Deal found 7/23![Alaska Airlines logo]()
$289
This Southwest deal was found by Cheapflights users on 7/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/242:40 pm
ONT
- EUG
2 stops8h 00m
Southwest
Mon 8/313:55 pm
EUG
- ONT
1 stop5h 30m
Southwest
Deal found 7/27![Southwest logo]()
$268
Last-minute flights from Ontario to OregonDiscover last-minute flight deals from Ontario to Oregon. Data last updated July 28, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Oregon. Data last updated July 28, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/24. 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 8/76:20 am
ONT
- EUG
1 stop6h 44m
Delta
Mon 8/176:10 am
EUG
- ONT
1 stop5h 06m
Delta
Deal found 7/24![Delta logo]()
$247
This Southwest deal was found by Cheapflights users on 7/24. 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 8/113:00 pm
ONT
- EUG
1 stop6h 10m
Southwest
Tue 8/185:40 am
EUG
- ONT
1 stop4h 35m
Southwest
Deal found 7/24![Southwest logo]()
$237
This Southwest deal was found by Cheapflights users on 7/23. 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 8/145:40 am
ONT
- EUG
1 stop6h 00m
Southwest
Fri 8/211:15 pm
EUG
- ONT
2 stops8h 00m
Southwest
Deal found 7/23![Southwest logo]()
$242
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 8/1710:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Thu 8/2012:24 pm
BOI
- ONT
1 stop12h 26m
Frontier
Deal found 7/23![Frontier logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 7/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/227:56 pm
ONT
- PDX
1 stop21h 15m
Frontier
Sat 8/2912:20 pm
PDX
- ONT
1 stop11h 30m
Frontier
Deal found 7/25![Frontier logo]()
$248
This Southwest deal was found by Cheapflights users on 7/24. 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 8/257:15 am
ONT
- BOI
1 stop5h 35m
Southwest
Thu 8/279:05 am
BOI
- ONT
1 stop3h 45m
Southwest
Deal found 7/24![Southwest logo]()
$202
This Southwest deal was found by Cheapflights users on 7/23. 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 8/257:15 am
ONT
- BOI
1 stop5h 35m
Southwest
Fri 8/287:30 am
BOI
- ONT
1 stop6h 55m
Southwest
Deal found 7/23![Southwest logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 8/266:00 am
ONT
- PDX
1 stop11h 11m
Frontier
Fri 8/286:17 pm
PDX
- ONT
1 stop13h 46m
Frontier
Deal found 7/23![Frontier logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Wed 8/266:00 am
ONT
- PDX
1 stop11h 11m
Frontier
Sun 8/301:47 pm
PDX
- ONT
1 stop18h 16m
Frontier
Deal found 7/26![Frontier logo]()
$252
This Southwest deal was found by Cheapflights users on 7/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/274:10 pm
ONT
- BOI
2 stops6h 25m
Southwest
Sat 8/296:10 am
BOI
- ONT
1 stop6h 05m
Southwest
Deal found 7/27![Southwest logo]()
$212
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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.
Sat 8/294:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 9/13:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$177
This SmartFares deal was found by Cheapflights users on 7/26. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/294:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sun 8/306:00 am
BOI
- ONT
1 stop4h 51m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$182
One-way flights from Ontario to OregonSearch for one-way flight options from Ontario to Oregon. Find affordable one-way fares based on user searches. Data last updated July 28, 2026.
Search for one-way flight options from Ontario to Oregon. Find affordable one-way fares based on user searches. Data last updated July 28, 2026.
This Southwest deal was found by Cheapflights users on 7/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:15 pm
ONT
- BOI
1 stop5h 55m
Southwest
Deal found 7/27![Southwest logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 9/26:00 am
ONT
- PDX
1 stop11h 11m
Frontier
Deal found 7/23![Frontier logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 9/126:15 am
ONT
- PDX
1 stop10h 20m
Frontier
Deal found 7/23![Frontier logo]()
$104
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Tue 8/256:00 am
ONT
- PDX
1 stop11h 11m
Frontier
Deal found 7/26![Frontier logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Wed 8/266:00 am
ONT
- PDX
1 stop11h 11m
Frontier
Deal found 7/26![Frontier logo]()
$107
This Booking.com deal was found by Cheapflights users on 7/26. 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.
Mon 10/2611:13 am
ONT
- BOI
1 stop6h 04m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 8/226:00 am
ONT
- PDX
1 stop11h 11m
Frontier
Deal found 7/23![Frontier logo]()
$112
This Trip.com deal was found by Cheapflights users on 7/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:56 pm
ONT
- PDX
1 stop21h 15m
Frontier
Deal found 7/27![Frontier logo]()
$114
This Southwest deal was found by Cheapflights users on 7/24. 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 10/115:10 pm
ONT
- BOI
1 stop7h 45m
Southwest
Deal found 7/24![Southwest logo]()
$114
This Trip.com deal was found by Cheapflights users on 7/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:24 pm
ONT
- BOI
1 stop16h 31m
Frontier
Deal found 7/27![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:15 am
ONT
- PDX
1 stop34h 20m
Frontier
Deal found 7/27![Frontier logo]()
$118
This United Airlines deal was found by Cheapflights users on 7/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:00 am
ONT
- EUG
1 stop6h 01m
United Airlines
Deal found 7/26![United Airlines logo]()
$119
Find flight deals from Ontario to Oregon
Keep the following information in mind while searching for Ontario to Oregon flight deals. Data was last updated July 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $175 (Traveloka) |
One-way from | $99 (Southwest) |
Popular in | June |
Cheapest in | January |
Average price | $303 |
Good round-trip deal | $317 or less |
Good one-way deal | $238 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Oregon 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 July 28, 2026.
Use the filters below to find and compare flights from Ontario to Oregon that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sat 8/29
7:12 am-1:21 pm
1 stop5h 09m
Boise Air Term. Gowen Fld
Tue 9/1
3:02 pm-4:10 pm
Nonstop2h 08m
$197
Quickest round-trip
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Fri 9/25
4:50 pm-7:45 pm
Nonstop1h 55m
Boise Air Term. Gowen Fld
Sun 9/27
3:02 pm-4:10 pm
Nonstop2h 08m
$237
OntarioEugene
ONT - EUG
ONTEUG
Ontario
Wed 8/26
4:45 pm-9:10 pm
1 stop4h 25m
Eugene
Sat 8/29
11:45 am-6:20 pm
2 stops6h 35m
$242
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Sat 9/19
7:12 am-9:30 am
Nonstop2h 18m
Portland
Wed 9/23
2:53 pm-5:18 pm
Nonstop2h 25m
$247
OntarioMedford
ONT - MFR
ONTMFR
Ontario
Thu 9/24
9:12 pm-8:32 am
1 stop11h 20m
Medford
Mon 9/28
3:40 pm-8:54 pm
1 stop5h 14m
$252
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Thu 9/24
6:30 am-10:15 am
1 stop3h 45m
Portland
Tue 9/29
7:50 am-1:35 pm
1 stop5h 45m
$252
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Wed 9/9
5:45 am-1:40 pm
2 stops6h 55m
Boise Air Term. Gowen Fld
Wed 9/16
3:40 pm-9:00 pm
2 stops6h 20m
$252
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Thu 11/12
11:55 am-7:58 pm
1 stop8h 03m
Portland
Sun 11/15
7:14 pm-11:48 pm
1 stop4h 34m
$257
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Tue 8/18
11:56 am-7:44 pm
1 stop7h 48m
Portland
Sat 8/22
5:54 pm-10:45 pm
1 stop4h 51m
$257
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Thu 8/20
6:20 am-11:45 am
1 stop5h 25m
Portland
Thu 8/27
5:30 am-11:16 am
1 stop5h 46m
$257
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Ontario to Oregon
Have a flexible travel schedule? Discover the best time to fly to Oregon from Ontario with our price prediction graph.
ONT-BOI
ONT-EUG
ONT-RDM
ONT-PDX
ONT-MFR
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 Oregon
ONT-USOR
ONT-BOI
ONT-EUG
ONT-RDM
ONT-PDX
What is the cheapest month to book a flight from Ontario to Oregon?
Currently, October is the cheapest month in which you can book a flight from Ontario to Oregon (average of $222). Flying from Ontario to Oregon in July is currently the most expensive (average of $341). 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 OR?
Find hourly flight availability from Ontario to Oregon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 28, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 68% on flights from Ontario to Oregon by exploring options for tickets in the evening.
Weekly flight availability from Ontario to Oregon
Explore weekly flight availability from Ontario to Oregon. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 28, 2026.
The most flights from ONT to USOR are scheduled on a Monday (3 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from Ontario to Oregon?
Airfare is typical for this route at the moment.
Ontario to Oregon flights typically cost between $156 and $294 in September.The cheapest round-trip price found within the last 5 days was $247 on Alaska Airlines (Sep 5-Sep 8).
How far ahead should I book a flight from Ontario to Oregon?
The price you pay for your flight from Ontario to Oregon 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 day to fly from Ontario to Oregon?
Use this chart to determine the cheapest time to fly round-trip from Ontario to Oregon. Price data was last updated on July 25, 2026.
Travelers seeking maximum savings on their Ontario to Oregon 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.
Reviews of airlines servicing Oregon
Get insights into the airlines that provide service to Oregon. 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 Oregon. Reviews last updated July 28, 2026.
See what other customers who have flown with Southwest,Alaska Airlines, andDelta from Ontario to Oregon have to say. 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.
Comfort
8.0
Food
7.0
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Food
7.0
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Food
7.0
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Food
7.0
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Food
7.0
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Food
7.0
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
8.0
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 Oregon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for Ontario to Oregon
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Oregon by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Oregon by cabin class
Find flights from Ontario to Oregon, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Oregon flights
Browse other Ontario and Oregon flight options. Last updated on July 28, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Ontario to Oregon flights
Consider these flights traveling from Ontario to Oregon.
Top 6 airlines flying from Ontario to Oregon
Discover the top 6 airlines that operate flights from Ontario to Oregon. 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 July 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$70 | Average$175 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$78 | Average$317 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$81 | Average$238 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$157 | Average$360 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$166 | Average$348 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$176 | Average$342 | FlexibilityNo cancel fee | On-time63% |