$111+ 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 5/27. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PDX
Jun 6 — Jun 131
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to Oregon with Cheapflights
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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 May 7, 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 May 7, 2026.
This CheapOair deal was found by Cheapflights users on 5/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/88:08 pm
STL
- BOI
1 stop17h 21m
Frontier
Sun 8/231:04 pm
BOI
- STL
1 stop5h 19m
Frontier
Deal found 5/5![Frontier logo]()
$274
This Mytrip deal was found by Cheapflights users on 5/6. 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.
Wed 5/276:51 pm
STL
- PDX
1 stop17h 14m
Frontier
Thu 5/2812:35 pm
PDX
- STL
1 stop28h 48m
Frontier
Deal found 5/6![Frontier logo]()
$275
This Mytrip deal was found by Cheapflights users on 5/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/227:38 pm
STL
- PDX
1 stop22h 57m
Frontier
Thu 6/258:42 pm
PDX
- STL
1 stop15h 24m
Frontier
Deal found 5/7![Frontier logo]()
$280
This Trip.com deal was found by Cheapflights users on 5/5. 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 5/206:51 pm
STL
- PDX
1 stop17h 29m
Frontier
Sun 5/2411:15 am
PDX
- STL
1 stop6h 56m
Frontier
Deal found 5/5![Frontier logo]()
$281
This CheapOair deal was found by Cheapflights users on 5/3. 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 6/249:48 pm
ORD
- BOI
1 stop15h 42m
Frontier
Tue 6/301:25 pm
BOI
- ORD
1 stop6h 18m
Frontier
Deal found 5/3![Frontier logo]()
$281
This Expedia deal was found by Cheapflights users on 5/3. 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.
Wed 7/226:20 am
ORD
- PDX
1 stop9h 23m
Multiple Airlines
Mon 7/276:59 pm
PDX
- ORD
1 stop8h 29m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$288
This Expedia deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/37:20 am
ORD
- PDX
Nonstop4h 25m
Multiple Airlines
Thu 7/96:59 pm
PDX
- ORD
1 stop8h 29m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$289
This Expedia deal was found by Cheapflights users on 5/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/295:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Tue 6/210:37 am
PDX
- STL
Nonstop4h 00m
Alaska Airlines
Deal found 5/6![Alaska Airlines logo]()
$289
This Expedia deal was found by Cheapflights users on 5/2. 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.
Sun 8/27:15 am
ORD
- PDX
1 stop12h 49m
Frontier
Sat 8/85:42 pm
PDX
- ORD
1 stop10h 35m
Frontier
Deal found 5/2![Frontier logo]()
$290
This Expedia deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/295:33 pm
STL
- PDX
Nonstop4h 17m
Multiple Airlines
Thu 6/411:15 am
PDX
- STL
1 stop6h 56m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$290
This Trip.com deal was found by Cheapflights users on 5/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/219:06 pm
STL
- PDX
1 stop15h 14m
Frontier
Thu 5/2812:35 pm
PDX
- STL
1 stop28h 48m
Frontier
Deal found 5/7![Frontier logo]()
$291
This American Airlines deal was found by Cheapflights users on 5/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1211:55 am
MLI
- PDX
1 stop9h 06m
American Airlines
Sat 9/195:20 am
PDX
- MLI
1 stop8h 41m
American Airlines
Deal found 5/5![American Airlines logo]()
$291
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 May 7, 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 May 7, 2026.
This United Airlines deal was found by Cheapflights users on 5/4. 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 6/206:45 am
ORD
- PDX
Nonstop4h 25m
United Airlines
Sat 6/2711:40 pm
PDX
- ORD
Nonstop4h 05m
United Airlines
Deal found 5/4![United Airlines logo]()
$305
This Alaska Airlines deal was found by Cheapflights users on 5/5. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/295:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Mon 6/110:37 am
PDX
- STL
Nonstop4h 00m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$309
This Southwest deal was found by Cheapflights users on 5/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/410:15 am
STL
- PDX
1 stop5h 20m
Southwest
Wed 7/810:40 am
PDX
- STL
1 stop9h 00m
Southwest
Deal found 5/7![Southwest logo]()
$309
This Delta deal was found by Cheapflights users on 5/6. 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.
Sun 6/217:55 pm
STL
- PDX
1 stop5h 51m
Delta
Thu 6/2512:33 am
PDX
- STL
1 stop6h 09m
Delta
Deal found 5/6![Delta logo]()
$309
This American Airlines deal was found by Cheapflights users on 5/2. 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.
Tue 6/305:29 am
STL
- BOI
1 stop5h 59m
American Airlines
Tue 7/73:10 pm
BOI
- STL
1 stop8h 06m
American Airlines
Deal found 5/2![American Airlines logo]()
$395
This United Airlines deal was found by Cheapflights users on 5/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/247:05 am
ORD
- PDX
Nonstop4h 34m
United Airlines
Fri 5/2911:53 pm
PDX
- ORD
Nonstop4h 05m
United Airlines
Deal found 5/6![United Airlines logo]()
$305
This Delta deal was found by Cheapflights users on 5/5. 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.
Sat 7/255:00 pm
STL
- PDX
1 stop7h 38m
Delta
Fri 7/3111:15 pm
PDX
- STL
1 stop8h 16m
Delta
Deal found 5/5![Delta logo]()
$309
This Alaska Airlines deal was found by Cheapflights users on 5/4. 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 6/247:20 am
ORD
- PDX
Nonstop4h 25m
Alaska Airlines
Sun 6/2810:59 pm
PDX
- ORD
Nonstop4h 01m
Alaska Airlines
Deal found 5/4![Alaska Airlines logo]()
$316
This Southwest deal was found by Cheapflights users on 5/6. 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.
Sat 6/68:25 pm
MDW
- PDX
Nonstop4h 20m
Southwest
Sat 6/138:20 pm
PDX
- MDW
1 stop6h 50m
Southwest
Deal found 5/6![Southwest logo]()
$325
This United Airlines deal was found by Cheapflights users on 5/2. 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 7/187:00 am
ORD
- PDX
Nonstop4h 34m
United Airlines
Tue 7/2111:40 pm
PDX
- ORD
Nonstop4h 05m
United Airlines
Deal found 5/2![United Airlines logo]()
$305
This Delta deal was found by Cheapflights users on 5/4. 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 7/77:06 pm
MDW
- PDX
1 stop6h 12m
Delta
Fri 7/1012:33 am
PDX
- MDW
1 stop6h 04m
Delta
Deal found 5/4![Delta logo]()
$325
This Alaska Airlines deal was found by Cheapflights users on 5/6. 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 10/146:00 am
ORD
- PDX
1 stop7h 36m
Alaska Airlines
Wed 10/219:28 am
PDX
- ORD
1 stop6h 52m
Alaska Airlines
Deal found 5/6![Alaska Airlines logo]()
$325
This Southwest deal was found by Cheapflights users on 5/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/155:25 am
MDW
- BOI
1 stop6h 40m
Southwest
Tue 7/214:20 pm
BOI
- MDW
1 stop6h 45m
Southwest
Deal found 5/7![Southwest logo]()
$335
This United Airlines deal was found by Cheapflights users on 5/4. 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 11/37:45 pm
ORD
- PDX
Nonstop4h 33m
United Airlines
Sat 11/74:29 pm
PDX
- ORD
Nonstop4h 13m
United Airlines
Deal found 5/4![United Airlines logo]()
$305
This Alaska Airlines deal was found by Cheapflights users on 5/2. 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 7/256:20 am
ORD
- PDX
1 stop9h 23m
Alaska Airlines
Sat 8/110:59 pm
PDX
- ORD
Nonstop4h 01m
Alaska Airlines
Deal found 5/2![Alaska Airlines logo]()
$335
This Delta deal was found by Cheapflights users on 5/3. 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 7/228:27 am
ORD
- BOI
1 stop6h 17m
Delta
Tue 7/282:50 pm
BOI
- ORD
1 stop6h 02m
Delta
Deal found 5/3![Delta logo]()
$335
This Southwest deal was found by Cheapflights users on 5/2. 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 5/289:50 pm
MDW
- PDX
Nonstop4h 20m
Southwest
Sun 5/3111:55 pm
PDX
- MDW
Nonstop3h 55m
Southwest
Deal found 5/2![Southwest logo]()
$336
This United Airlines deal was found by Cheapflights users on 5/4. 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 7/115:00 am
ORD
- PDX
1 stop6h 47m
United Airlines
Tue 7/142:25 pm
PDX
- ORD
Nonstop4h 13m
United Airlines
Deal found 5/4![United Airlines logo]()
$315
This Alaska Airlines deal was found by Cheapflights users on 5/7. 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.
Fri 5/297:40 am
ORD
- BOI
1 stop8h 54m
Alaska Airlines
Mon 6/18:51 pm
BOI
- ORD
1 stop8h 29m
Alaska Airlines
Deal found 5/7![Alaska Airlines logo]()
$335
This Southwest deal was found by Cheapflights users on 5/2. 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 6/119:35 pm
MDW
- PDX
Nonstop4h 20m
Southwest
Mon 6/158:15 pm
PDX
- MDW
1 stop7h 30m
Southwest
Deal found 5/2![Southwest logo]()
$337
This Delta deal was found by Cheapflights users on 5/4. 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 6/138:36 am
ORD
- BOI
2 stops11h 29m
Delta
Sat 6/276:00 am
BOI
- ORD
1 stop5h 00m
Delta
Deal found 5/4![Delta logo]()
$340
This United Airlines deal was found by Cheapflights users on 5/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/266:59 am
ORD
- PDX
Nonstop4h 34m
United Airlines
Tue 6/3010:40 pm
PDX
- ORD
Nonstop4h 05m
United Airlines
Deal found 5/6![United Airlines logo]()
$316
This Alaska Airlines deal was found by Cheapflights users on 5/5. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/206:00 am
ORD
- PDX
1 stop9h 39m
Alaska Airlines
Thu 9/245:35 pm
PDX
- ORD
Nonstop4h 06m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$337
This American Airlines deal was found by Cheapflights users on 5/2. 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.
Thu 6/114:45 pm
MLI
- PDX
1 stop10h 05m
American Airlines
Sun 6/1410:59 pm
PDX
- MLI
1 stop9h 42m
American Airlines
Deal found 5/2![American Airlines logo]()
$496
This Delta deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/242:09 pm
ORD
- BOI
2 stops10h 46m
Delta
Tue 6/305:30 am
BOI
- ORD
1 stop5h 01m
Delta
Deal found 5/2![Delta logo]()
$340
This Southwest deal was found by Cheapflights users on 5/6. 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.
Fri 7/106:25 pm
MDW
- PDX
2 stops8h 05m
Southwest
Sat 7/187:45 pm
PDX
- MDW
1 stop7h 15m
Southwest
Deal found 5/6![Southwest logo]()
$341
This United Airlines deal was found by Cheapflights users on 5/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/276:00 am
ORD
- EUG
1 stop8h 57m
United Airlines
Wed 7/112:43 pm
EUG
- ORD
Nonstop4h 10m
United Airlines
Deal found 5/6![United Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 5/3. 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 7/216:55 am
ORD
- BOI
1 stop9h 16m
Delta
Tue 7/2811:53 am
BOI
- ORD
2 stops8h 59m
Delta
Deal found 5/3![Delta logo]()
$340
This Southwest deal was found by Cheapflights users on 5/3. 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 8/510:30 am
MDW
- PDX
2 stops9h 15m
Southwest
Mon 8/107:55 pm
PDX
- MDW
1 stop7h 05m
Southwest
Deal found 5/3![Southwest logo]()
$341
This Alaska Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/29:00 am
ORD
- PDX
1 stop9h 58m
Alaska Airlines
Sat 6/67:15 am
PDX
- ORD
1 stop9h 35m
Alaska Airlines
Deal found 5/4![Alaska Airlines logo]()
$346
Last-minute flights from Illinois to OregonDiscover last-minute flight deals from Illinois to Oregon. Data last updated May 7, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Oregon. Data last updated May 7, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 5/5. 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 5/206:51 pm
STL
- PDX
1 stop17h 29m
Frontier
Sun 5/2411:15 am
PDX
- STL
1 stop6h 56m
Frontier
Deal found 5/5![Frontier logo]()
$281
This Trip.com deal was found by Cheapflights users on 5/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/219:06 pm
STL
- PDX
1 stop15h 14m
Frontier
Thu 5/2812:35 pm
PDX
- STL
1 stop28h 48m
Frontier
Deal found 5/7![Frontier logo]()
$291
This Super.com deal was found by Cheapflights users on 5/3. 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.
Fri 5/229:37 pm
ORD
- PDX
1 stop21h 09m
Frontier
Sat 5/305:31 pm
PDX
- ORD
1 stop11h 03m
Frontier
Deal found 5/3![Frontier logo]()
$292
This Mytrip deal was found by Cheapflights users on 5/6. 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.
Wed 5/276:51 pm
STL
- PDX
1 stop17h 14m
Frontier
Thu 5/2812:35 pm
PDX
- STL
1 stop28h 48m
Frontier
Deal found 5/6![Frontier logo]()
$275
This American Airlines deal was found by Cheapflights users on 5/3. 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.
Thu 5/286:56 pm
MLI
- PDX
1 stop6h 56m
American Airlines
Tue 6/25:07 am
PDX
- MLI
1 stop8h 59m
American Airlines
Deal found 5/3![American Airlines logo]()
$291
This United Airlines deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/285:39 pm
MLI
- PDX
1 stop6h 50m
United Airlines
Tue 6/211:16 am
PDX
- MLI
2 stops9h 58m
United Airlines
Deal found 5/3![United Airlines logo]()
$296
This CheapOair deal was found by Cheapflights users on 5/7. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/285:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Thu 6/410:37 am
PDX
- STL
Nonstop4h 00m
Alaska Airlines
Deal found 5/7![Alaska Airlines logo]()
$299
This Expedia deal was found by Cheapflights users on 5/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/295:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Tue 6/210:37 am
PDX
- STL
Nonstop4h 00m
Alaska Airlines
Deal found 5/6![Alaska Airlines logo]()
$289
This Expedia deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/295:33 pm
STL
- PDX
Nonstop4h 17m
Multiple Airlines
Thu 6/411:15 am
PDX
- STL
1 stop6h 56m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 5/299:06 pm
STL
- PDX
2 stops21h 40m
Frontier
Tue 6/25:46 pm
PDX
- STL
1 stop23h 37m
Frontier
Deal found 5/4![Frontier logo]()
$293
This Mytrip deal was found by Cheapflights users on 5/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/227:38 pm
STL
- PDX
1 stop22h 57m
Frontier
Thu 6/258:42 pm
PDX
- STL
1 stop15h 24m
Frontier
Deal found 5/7![Frontier logo]()
$280
This CheapOair deal was found by Cheapflights users on 5/3. 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 6/249:48 pm
ORD
- BOI
1 stop15h 42m
Frontier
Tue 6/301:25 pm
BOI
- ORD
1 stop6h 18m
Frontier
Deal found 5/3![Frontier logo]()
$281
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 May 7, 2026.
Search for one-way flight options from Illinois to Oregon. Find affordable one-way fares based on user searches. Data last updated May 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/278:08 pm
STL
- PDX
1 stop22h 38m
Frontier
Deal found 5/5![Frontier logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 5/279:37 pm
ORD
- BOI
1 stop15h 53m
Frontier
Deal found 5/4![Frontier logo]()
$112
This Trip.com deal was found by Cheapflights users on 5/5. 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 7/297:03 pm
STL
- PDX
1 stop25h 01m
Frontier
Deal found 5/5![Frontier logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 5/7. 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.
Tue 7/286:33 pm
STL
- PDX
2 stops45h 25m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$121
This Frontier deal was found by Cheapflights users on 5/3. 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 6/192:56 pm
STL
- PDX
1 stop6h 51m
Frontier
Deal found 5/3![Frontier logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 5/7. 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.
Mon 8/249:48 pm
ORD
- BOI
1 stop15h 21m
Frontier
Deal found 5/7![Frontier logo]()
$127
This Mytrip deal was found by Cheapflights users on 5/6. 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 6/137:38 pm
STL
- PDX
1 stop23h 19m
Frontier
Deal found 5/6![Frontier logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/39:37 pm
ORD
- BOI
1 stop16h 01m
Frontier
Deal found 5/7![Frontier logo]()
$129
This CheapOair deal was found by Cheapflights users on 5/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/89:57 pm
ORD
- BOI
1 stop15h 32m
Frontier
Deal found 5/5![Frontier logo]()
$130
This Expedia deal was found by Cheapflights users on 5/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/157:38 pm
STL
- PDX
1 stop22h 57m
Frontier
Deal found 5/6![Frontier logo]()
$131
This Trip.com deal was found by Cheapflights users on 5/4. 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.
Fri 5/299:06 pm
STL
- PDX
1 stop15h 28m
Frontier
Deal found 5/4![Frontier logo]()
$134
This Mytrip deal was found by Cheapflights users on 5/6. 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.
Tue 6/98:08 pm
STL
- PDX
1 stop22h 27m
Frontier
Deal found 5/6![Frontier logo]()
$135
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 May 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $268 (Kiwi.com) |
One-way from | $111 (Kiwi.com) |
Popular in | March |
Cheapest in | January |
Average price | $305 |
Good round-trip deal | $305 or less |
Good one-way deal | $163 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 May 7, 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
ChicagoPortland
ORD - PDX
ORDPDX
Chicago O'Hare Intl
Sat 6/20
6:45 am-9:10 am
Nonstop4h 25m
Portland
Sat 6/27
11:40 pm-5:45 am
Nonstop4h 05m
$305
ChicagoPortland
ORD - PDX
ORDPDX
Chicago O'Hare Intl
Sun 5/24
7:05 am-9:39 am
Nonstop4h 34m
Portland
Fri 5/29
11:53 pm-5:58 am
Nonstop4h 05m
$305
ChicagoPortland
ORD - PDX
ORDPDX
Chicago O'Hare Intl
Sat 7/18
7:00 am-9:34 am
Nonstop4h 34m
Portland
Tue 7/21
11:40 pm-5:45 am
Nonstop4h 05m
$305
ChicagoPortland
ORD - PDX
ORDPDX
Chicago O'Hare Intl
Tue 11/3
7:45 pm-10:18 pm
Nonstop4h 33m
Portland
Sat 11/7
4:29 pm-10:42 pm
Nonstop4h 13m
$305
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 5/29
5:33 pm-7:50 pm
Nonstop4h 17m
Portland
Mon 6/1
10:37 am-4:37 pm
Nonstop4h 00m
$309
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 7/4
10:15 am-1:35 pm
1 stop5h 20m
Portland
Wed 7/8
10:40 am-9:40 pm
1 stop9h 00m
$309
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sun 6/21
7:55 pm-11:46 pm
1 stop5h 51m
Portland
Thu 6/25
12:33 am-8:42 am
1 stop6h 09m
$309
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 7/25
5:00 pm-10:38 pm
1 stop7h 38m
Portland
Fri 7/31
11:15 pm-9:31 am
1 stop8h 16m
$309
ChicagoPortland
ORD - PDX
ORDPDX
Chicago O'Hare Intl
Sat 7/11
5:00 am-9:47 am
1 stop6h 47m
Portland
Tue 7/14
2:25 pm-8:38 pm
Nonstop4h 13m
$315
ChicagoPortland
ORD - PDX
ORDPDX
Chicago O'Hare Intl
Wed 6/24
7:20 am-9:45 am
Nonstop4h 25m
Portland
Sun 6/28
10:59 pm-5:00 am
Nonstop4h 01m
$316
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-PDX
STL-PDX
STL-BOI
MDW-PDX
MDW-BOI
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-PDX
STL-PDX
STL-BOI
MDW-PDX
How far ahead should I book a flight from Illinois to Oregon?
To ensure you get the cheapest price possible for a flight from Illinois to Oregon, you should look to book at least 77 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
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 $123). Flying from Illinois to Oregon in October is currently the most expensive (average of $692). 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 May 7, 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 20% 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 May 2, 2026.
Travelers seeking maximum savings on their Illinois to Oregon flight should consider departing on Saturday afternoons when fares are most often at their lowest. Sunday 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 May 7, 2026.
The most flights from USIL to USOR are scheduled on a Wednesday (24 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).
How much does it cost to fly round-trip from Illinois to Oregon?
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 May 7, 2026.
Read reviews from past customers who have flown Alaska Airlines,Southwest, 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.
Comfort
7.8
Crew
8.5
Food
7.1
Boarding
8.1
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Comfort
7.8
Crew
8.5
Food
7.1
Boarding
8.1
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Comfort
7.8
Crew
8.5
Food
7.1
Boarding
8.1
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Comfort
7.8
Crew
8.5
Food
7.1
Boarding
8.1
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Comfort
7.8
Crew
8.5
Food
7.1
Boarding
8.1
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Comfort
7.8
Crew
8.5
Food
7.1
Boarding
8.1
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
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
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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 May 7, 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 May 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$86 | Average$178 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$124 | Average$351 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$139 | Average$411 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$150 | Average$248 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$189 | Average$417 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$197 | Average$508 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$199 | Average$476 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$227 | Average$358 | FlexibilityNo cancel fee | On-time63% |