$76+ Cheap flights from Illinois 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PDX
Apr 16 — Apr 231
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Illinois 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
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.Cheap flight deals from Illinois to Oregon
Cheapest
Best
Last-minute
One-way
Cheapest flights from Illinois to OregonExplore the most affordable flight options available from Illinois to Oregon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 17, 2026.
Explore the most affordable flight options available from Illinois to Oregon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 17, 2026.
This Frontier deal was found by Cheapflights users on 3/14. 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 4/308:58 pm
ORD
- PDX
1 stop14h 01m
Frontier
Fri 5/85:31 pm
PDX
- ORD
1 stop11h 08m
Frontier
Deal found 3/14![Frontier logo]()
$210
This Frontier deal was found by Cheapflights users on 3/15. 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 5/28:17 pm
STL
- PDX
1 stop16h 03m
Frontier
Mon 5/118:46 pm
PDX
- STL
1 stop19h 20m
Frontier
Deal found 3/15![Frontier logo]()
$210
This Delta deal was found by Cheapflights users on 3/16. 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 4/146:45 pm
STL
- PDX
1 stop7h 08m
Delta
Wed 4/2211:15 pm
PDX
- STL
1 stop8h 27m
Delta
Deal found 3/16![Delta logo]()
$217
This Mytrip deal was found by Cheapflights users on 3/12. 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 4/187:21 pm
ORD
- PDX
1 stop18h 29m
Frontier
Mon 4/279:54 am
PDX
- ORD
1 stop17h 56m
Frontier
Deal found 3/12![Frontier logo]()
$219
This Mytrip deal was found by Cheapflights users on 3/15. 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.
Thu 5/1412:16 pm
STL
- PDX
1 stop10h 35m
Frontier
Sun 5/179:46 pm
PDX
- STL
1 stop20h 37m
Frontier
Deal found 3/15![Frontier logo]()
$220
This Super.com deal was found by Cheapflights users on 3/16. 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.
Sat 4/257:21 pm
ORD
- PDX
1 stop18h 29m
Frontier
Sat 5/212:27 pm
PDX
- ORD
1 stop19h 18m
Frontier
Deal found 3/16![Frontier logo]()
$221
This CheapOair deal was found by Cheapflights users on 3/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/136:51 pm
STL
- PDX
1 stop28h 00m
Frontier
Mon 5/188:46 pm
PDX
- STL
1 stop19h 20m
Frontier
Deal found 3/16![Frontier logo]()
$221
This Booking.com deal was found by Cheapflights users on 3/12. 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.
Wed 5/69:42 pm
ORD
- PDX
1 stop21h 04m
Frontier
Thu 5/145:31 pm
PDX
- ORD
1 stop11h 08m
Frontier
Deal found 3/12![Frontier logo]()
$223
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 4/258:17 pm
STL
- PDX
1 stop16h 03m
Frontier
Tue 4/2812:38 pm
PDX
- STL
2 stops32h 41m
Frontier
Deal found 3/14![Frontier logo]()
$227
This Orbitz deal was found by Cheapflights users on 3/13. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/239:55 pm
STL
- PDX
1 stop13h 04m
Frontier
Sun 4/2611:15 am
PDX
- STL
1 stop6h 06m
Frontier
Deal found 3/13![Frontier logo]()
$231
This United Airlines deal was found by Cheapflights users on 3/13. 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.
Wed 5/135:59 pm
STL
- PDX
1 stop6h 55m
United Airlines
Mon 5/187:45 pm
PDX
- STL
1 stop8h 02m
United Airlines
Deal found 3/13![United Airlines logo]()
$232
This Expedia deal was found by Cheapflights users on 3/12. 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.
Tue 5/195:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Fri 5/2210:37 am
PDX
- STL
Nonstop4h 00m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$233
Best flights from Illinois to OregonDiscover carefully curated flight deals from Illinois to Oregon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 17, 2026.
Discover carefully curated flight deals from Illinois to Oregon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 17, 2026.
This Delta deal was found by Cheapflights users on 3/16. 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 4/146:45 pm
STL
- PDX
1 stop7h 08m
Delta
Wed 4/2211:15 pm
PDX
- STL
1 stop8h 27m
Delta
Deal found 3/16![Delta logo]()
$217
This Alaska Airlines deal was found by Cheapflights users on 3/13. 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 4/186:00 am
ORD
- EUG
1 stop8h 30m
Alaska Airlines
Tue 4/211:07 pm
EUG
- ORD
1 stop8h 52m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$257
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Wed 5/68:00 pm
ORD
- PDX
Nonstop4h 35m
United Airlines
Thu 5/1411:55 pm
PDX
- ORD
Nonstop4h 05m
United Airlines
Deal found 3/12![United Airlines logo]()
$279
This Southwest deal was found by Cheapflights users on 3/15. 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 4/1810:15 am
MDW
- PDX
Nonstop4h 20m
Southwest
Sat 4/257:05 pm
PDX
- MDW
1 stop8h 35m
Southwest
Deal found 3/15![Southwest logo]()
$281
This Delta deal was found by Cheapflights users on 3/15. 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 5/77:12 am
ORD
- EUG
1 stop7h 43m
Delta
Tue 5/121:35 pm
EUG
- ORD
1 stop6h 15m
Delta
Deal found 3/15![Delta logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 3/14. 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 4/174:10 pm
ORD
- EUG
1 stop8h 20m
Alaska Airlines
Sat 4/187:00 am
EUG
- ORD
1 stop10h 02m
Alaska Airlines
Deal found 3/14![Alaska Airlines logo]()
$267
This Southwest deal was found by Cheapflights users on 3/15. 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 4/226:10 am
MDW
- PDX
1 stop8h 45m
Southwest
Sat 4/2511:55 pm
PDX
- MDW
Nonstop3h 55m
Southwest
Deal found 3/15![Southwest logo]()
$281
This Delta deal was found by Cheapflights users on 3/16. 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 4/176:00 pm
ORD
- EUG
1 stop7h 58m
Delta
Tue 4/216:30 am
EUG
- ORD
1 stop8h 09m
Delta
Deal found 3/16![Delta logo]()
$257
This United Airlines deal was found by Cheapflights users on 3/12. 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 5/298:40 am
ORD
- BOI
Nonstop3h 52m
United Airlines
Fri 6/55:46 pm
BOI
- ORD
1 stop5h 58m
United Airlines
Deal found 3/12![United Airlines logo]()
$299
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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 4/73:50 pm
STL
- BOI
1 stop8h 07m
Alaska Airlines
Wed 4/82:22 pm
BOI
- STL
1 stop8h 37m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 3/16. 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 5/86:20 pm
ORD
- EUG
1 stop7h 30m
Delta
Mon 5/115:10 am
EUG
- ORD
2 stops10h 55m
Delta
Deal found 3/16![Delta logo]()
$262
This Southwest deal was found by Cheapflights users on 3/16. 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 5/123:40 pm
MDW
- PDX
1 stop7h 05m
Southwest
Sat 5/1612:20 pm
PDX
- MDW
1 stop14h 15m
Southwest
Deal found 3/16![Southwest logo]()
$292
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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 5/66:00 am
ORD
- RDM
1 stop8h 58m
Alaska Airlines
Sat 5/91:52 pm
RDM
- ORD
1 stop8h 07m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$277
This United Airlines deal was found by Cheapflights users on 3/14. 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.
Wed 6/37:55 pm
ORD
- PDX
Nonstop4h 35m
United Airlines
Sat 6/65:00 pm
PDX
- ORD
Nonstop4h 13m
United Airlines
Deal found 3/14![United Airlines logo]()
$305
This Southwest deal was found by Cheapflights users on 3/14. 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 4/214:50 pm
ORD
- PDX
1 stop8h 20m
Southwest
Tue 4/285:30 am
PDX
- ORD
2 stops11h 20m
Southwest
Deal found 3/14![Southwest logo]()
$296
This United Airlines deal was found by Cheapflights users on 3/12. 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 4/78:00 pm
ORD
- PDX
Nonstop4h 34m
United Airlines
Sat 4/114:15 pm
PDX
- ORD
1 stop6h 14m
United Airlines
Deal found 3/12![United Airlines logo]()
$306
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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 4/104:10 pm
ORD
- BOI
1 stop8h 37m
Alaska Airlines
Tue 4/142:22 pm
BOI
- ORD
1 stop8h 37m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$283
This Delta deal was found by Cheapflights users on 3/12. 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 4/76:12 pm
STL
- BOI
1 stop4h 59m
Delta
Sat 4/118:00 am
BOI
- STL
1 stop5h 43m
Delta
Deal found 3/12![Delta logo]()
$297
This Southwest deal was found by Cheapflights users on 3/12. 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 4/214:00 pm
MDW
- PDX
2 stops9h 10m
Southwest
Mon 4/273:00 pm
PDX
- MDW
1 stop6h 55m
Southwest
Deal found 3/12![Southwest logo]()
$304
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Mon 5/48:00 pm
ORD
- PDX
Nonstop4h 35m
United Airlines
Thu 5/74:15 pm
PDX
- ORD
1 stop6h 43m
United Airlines
Deal found 3/12![United Airlines logo]()
$317
This Southwest deal was found by Cheapflights users on 3/12. 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 6/116:30 pm
STL
- PDX
1 stop7h 25m
Southwest
Sat 6/134:25 pm
PDX
- STL
1 stop6h 10m
Southwest
Deal found 3/12![Southwest logo]()
$308
This Delta deal was found by Cheapflights users on 3/12. 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 5/217:45 pm
ORD
- BOI
1 stop5h 19m
Delta
Mon 5/2511:39 pm
BOI
- ORD
1 stop8h 00m
Delta
Deal found 3/12![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 3/16. 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 6/58:07 pm
ORD
- PDX
Nonstop4h 35m
United Airlines
Sun 6/710:40 pm
PDX
- ORD
Nonstop4h 05m
United Airlines
Deal found 3/16![United Airlines logo]()
$327
This Southwest deal was found by Cheapflights users on 3/12. 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 4/156:30 am
MDW
- BOI
1 stop5h 25m
Southwest
Sat 4/181:55 pm
BOI
- MDW
1 stop8h 10m
Southwest
Deal found 3/12![Southwest logo]()
$309
This Alaska Airlines deal was found by Cheapflights users on 3/15. 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 5/137:41 pm
STL
- PDX
1 stop16h 06m
Alaska Airlines
Mon 5/1810:37 am
PDX
- STL
Nonstop4h 00m
Alaska Airlines
Deal found 3/15![Alaska Airlines logo]()
$340
This Delta deal was found by Cheapflights users on 3/12. 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 5/272:11 pm
ORD
- BOI
2 stops9h 02m
Delta
Wed 6/38:58 am
BOI
- ORD
2 stops11h 52m
Delta
Deal found 3/12![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 3/16. 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 4/309:15 am
ORD
- EUG
Nonstop4h 45m
United Airlines
Wed 5/61:07 pm
EUG
- ORD
Nonstop3h 52m
United Airlines
Deal found 3/16![United Airlines logo]()
$329
This Southwest deal was found by Cheapflights users on 3/12. 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 4/105:15 pm
MDW
- BOI
2 stops8h 45m
Southwest
Mon 4/134:20 pm
BOI
- MDW
1 stop6h 20m
Southwest
Deal found 3/12![Southwest logo]()
$314
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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 4/303:52 pm
ORD
- PDX
1 stop9h 32m
Alaska Airlines
Sun 5/39:27 pm
PDX
- ORD
1 stop13h 46m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$347
This Delta deal was found by Cheapflights users on 3/12. 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 8/299:20 am
MDW
- PDX
1 stop8h 38m
Delta
Fri 9/412:40 am
PDX
- MDW
1 stop5h 58m
Delta
Deal found 3/12![Delta logo]()
$325
Last-minute flights from Illinois to OregonDiscover last-minute flight deals from Illinois to Oregon. Data last updated March 17, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Oregon. Data last updated March 17, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 3/12. 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 4/48:16 pm
STL
- BOI
1 stop15h 52m
Frontier
Sun 4/1212:03 pm
BOI
- STL
1 stop20h 45m
Frontier
Deal found 3/12![Frontier logo]()
$240
This American Airlines deal was found by Cheapflights users on 3/13. 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 4/56:00 am
STL
- PDX
1 stop6h 48m
American Airlines
Sat 4/1811:47 pm
PDX
- STL
1 stop6h 37m
American Airlines
Deal found 3/13![American Airlines logo]()
$237
This Delta deal was found by Cheapflights users on 3/16. 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 4/146:45 pm
STL
- PDX
1 stop7h 08m
Delta
Wed 4/2211:15 pm
PDX
- STL
1 stop8h 27m
Delta
Deal found 3/16![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 3/13. 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 4/1510:30 am
ORD
- EUG
1 stop13h 30m
Southwest
Tue 4/216:35 am
EUG
- ORD
1 stop6h 25m
Southwest
Deal found 3/13![Southwest logo]()
$242
This Expedia deal was found by Cheapflights users on 3/15. 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 4/169:55 pm
STL
- PDX
1 stop13h 04m
Multiple Airlines
Tue 4/212:42 pm
PDX
- STL
1 stop7h 17m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$239
This Mytrip deal was found by Cheapflights users on 3/12. 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 4/187:21 pm
ORD
- PDX
1 stop18h 29m
Frontier
Mon 4/279:54 am
PDX
- ORD
1 stop17h 56m
Frontier
Deal found 3/12![Frontier logo]()
$219
This Gotogate deal was found by Cheapflights users on 3/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:21 pm
ORD
- PDX
1 stop18h 29m
Frontier
Mon 4/2712:45 pm
PDX
- ORD
1 stop15h 23m
Frontier
Deal found 3/15![Frontier logo]()
$239
This Orbitz deal was found by Cheapflights users on 3/13. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/239:55 pm
STL
- PDX
1 stop13h 04m
Frontier
Sun 4/2611:15 am
PDX
- STL
1 stop6h 06m
Frontier
Deal found 3/13![Frontier logo]()
$231
This Super.com deal was found by Cheapflights users on 3/16. 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.
Sat 4/257:21 pm
ORD
- PDX
1 stop18h 29m
Frontier
Sat 5/212:27 pm
PDX
- ORD
1 stop19h 18m
Frontier
Deal found 3/16![Frontier logo]()
$221
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 4/258:17 pm
STL
- PDX
1 stop16h 03m
Frontier
Tue 4/2812:38 pm
PDX
- STL
2 stops32h 41m
Frontier
Deal found 3/14![Frontier logo]()
$227
This Frontier deal was found by Cheapflights users on 3/14. 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 4/308:58 pm
ORD
- PDX
1 stop14h 01m
Frontier
Fri 5/85:31 pm
PDX
- ORD
1 stop11h 08m
Frontier
Deal found 3/14![Frontier logo]()
$210
This Mytrip deal was found by Cheapflights users on 3/15. 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.
Thu 4/307:21 pm
ORD
- PDX
1 stop18h 29m
Frontier
Thu 5/75:31 pm
PDX
- ORD
1 stop11h 08m
Frontier
Deal found 3/15![Frontier logo]()
$237
One-way flights from Illinois to OregonSearch for one-way flight options from Illinois to Oregon. Find affordable one-way fares based on user searches. Data last updated March 17, 2026.
Search for one-way flight options from Illinois to Oregon. Find affordable one-way fares based on user searches. Data last updated March 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/278:17 pm
STL
- PDX
1 stop17h 35m
Frontier
Deal found 3/12![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/258:17 pm
STL
- PDX
1 stop16h 03m
Frontier
Deal found 3/12![Frontier logo]()
$78
This Kiwi.com deal was found by Cheapflights users on 3/16. 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.
Fri 4/178:06 pm
STL
- PDX
1 stop17h 36m
Frontier
Deal found 3/16![Frontier logo]()
$89
This CheapOair deal was found by Cheapflights users on 3/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/195:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Deal found 3/15![Alaska Airlines logo]()
$99
This Delta deal was found by Cheapflights users on 3/12. 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 4/142:20 pm
STL
- PDX
1 stop5h 48m
Delta
Deal found 3/12![Delta logo]()
$109
This Frontier deal was found by Cheapflights users on 3/16. 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 5/1412:16 pm
STL
- PDX
1 stop10h 35m
Frontier
Deal found 3/16![Frontier logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/143:27 pm
ORD
- BOI
2 stops44h 41m
Frontier
Deal found 3/12![Frontier logo]()
$114
This Gotogate deal was found by Cheapflights users on 3/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/83:29 pm
ORD
- BOI
1 stop20h 39m
Frontier
Deal found 3/14![Frontier logo]()
$115
This Booking.com deal was found by Cheapflights users on 3/14. 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 4/115:53 pm
ORD
- BOI
1 stop18h 15m
Frontier
Deal found 3/14![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 3/16. 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.
Fri 5/19:44 pm
ORD
- PDX
2 stops38h 36m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$117
This CheapOair deal was found by Cheapflights users on 3/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/139:42 pm
ORD
- BOI
1 stop15h 45m
Frontier
Deal found 3/13![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/142:15 pm
MDW
- PDX
2 stops23h 23m
Frontier
Deal found 3/13![Frontier logo]()
$118
Find flight deals from Illinois to Oregon
Keep the following information in mind while searching for Illinois to Oregon flight deals. Data was last updated March 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $210 (Frontier) |
One-way from | $76 (Kiwi.com) |
Popular in | March |
Cheapest in | January |
Average price | $435 |
Good round-trip deal | $248 or less |
Good one-way deal | $133 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois 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 March 17, 2026.
Use the filters below to find and compare flights from Illinois to Oregon that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Tue 4/14
6:45 pm-11:53 pm
1 stop7h 08m
Portland
Wed 4/22
11:15 pm-9:42 am
1 stop8h 27m
$217
ChicagoEugene
ORD - EUG
ORDEUG
Chicago O'Hare Intl
Sat 4/18
6:00 am-12:30 pm
1 stop8h 30m
Eugene
Tue 4/21
1:07 pm-11:59 pm
1 stop8h 52m
$257
ChicagoEugene
ORD - EUG
ORDEUG
Chicago O'Hare Intl
Thu 5/7
7:12 am-12:55 pm
1 stop7h 43m
Eugene
Tue 5/12
1:35 pm-9:50 pm
1 stop6h 15m
$257
ChicagoEugene
ORD - EUG
ORDEUG
Chicago O'Hare Intl
Fri 4/17
6:00 pm-11:58 pm
1 stop7h 58m
Eugene
Tue 4/21
6:30 am-4:39 pm
1 stop8h 09m
$257
ChicagoEugene
ORD - EUG
ORDEUG
Chicago O'Hare Intl
Fri 5/8
6:20 pm-11:50 pm
1 stop7h 30m
Eugene
Mon 5/11
5:10 am-6:05 pm
2 stops10h 55m
$262
ChicagoEugene
ORD - EUG
ORDEUG
Chicago O'Hare Intl
Fri 4/17
4:10 pm-10:30 pm
1 stop8h 20m
Eugene
Sat 4/18
7:00 am-7:02 pm
1 stop10h 02m
$267
St. LouisBoise
STL - BOI
STLBOI
Lambert-St Louis
Tue 4/7
3:50 pm-10:57 pm
1 stop8h 07m
Boise Air Term. Gowen Fld
Wed 4/8
2:22 pm-11:59 pm
1 stop8h 37m
$277
ChicagoRedmond
ORD - RDM
ORDRDM
Chicago O'Hare Intl
Wed 5/6
6:00 am-12:58 pm
1 stop8h 58m
Bend/Redmond
Sat 5/9
1:52 pm-11:59 pm
1 stop8h 07m
$277
ChicagoPortland
ORD - PDX
ORDPDX
Chicago O'Hare Intl
Wed 5/6
8:00 pm-10:35 pm
Nonstop4h 35m
Portland
Thu 5/14
11:55 pm-6:00 am
Nonstop4h 05m
$279
ChicagoPortland
MDW - PDX
MDWPDX
Chicago Midway
Sat 4/18
10:15 am-12:35 pm
Nonstop4h 20m
Portland
Sat 4/25
7:05 pm-5:40 am
1 stop8h 35m
$281
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to Oregon
Have a flexible travel schedule? Discover the best time to fly to Oregon from Illinois with our price prediction graph.
ORD-EUG
STL-PDX
ORD-PDX
ORD-RDM
MDW-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 Illinois to Oregon
USIL-USOR
ORD-EUG
STL-PDX
ORD-PDX
ORD-RDM
What is the cheapest month to book a flight from Illinois to Oregon?
Currently, January is the cheapest month in which you can book a flight from Illinois to Oregon (average of $133). Flying from Illinois to Oregon in December is currently the most expensive (average of $207). 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 IL to OR?
Find hourly flight availability from Illinois 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 March 17, 2026.
One of the essential ways to save on airfare from Illinois to Oregon is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 17% on airfare.
What is the cheapest day to fly from Illinois to Oregon?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Oregon. Price data was last updated on March 14, 2026.
Travelers seeking maximum savings on their Illinois to Oregon flight should consider departing on Saturday mornings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Illinois to Oregon
Explore weekly flight availability from Illinois 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 March 17, 2026.
The most flights from USIL to USOR are scheduled on a Tuesday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).
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 March 17, 2026.
Read reviews from past customers who have flown Southwest,Alaska Airlines, andHawaiian Airlines from Illinois to Oregon. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Related info for your journey
Find useful and relevant information for your journey from Illinois 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.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Return Flight Options
Top destinations
Alternative routes for Illinois 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 Illinois to Oregon by cabin class
Find flights from Illinois to Oregon, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Oregon flights
Browse other Illinois and Oregon flight options. Last updated on March 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Oregon
Find the right flight back to Illinois after your stay in Oregon
Illinois to Oregon flights
Consider these flights traveling from Illinois to Oregon.
Top 8 airlines flying from Illinois to Oregon
Discover the top 8 airlines that operate flights from Illinois 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 March 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$86 | Average$178 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$124 | Average$366 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$139 | Average$398 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$150 | Average$232 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$194 | Average$486 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$194 | Average$404 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$201 | Average$436 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$227 | Average$383 | FlexibilityNo cancel fee | On-time63% |