$116+ 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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PDX
Sep 8 — Sep 151
Round-trip
1 adult, Economy
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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
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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 August 9, 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 August 9, 2026.
This Frontier deal was found by Cheapflights users on 8/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/57:00 am -
1 stop8h 57m
Mon 11/93:52 pm -
1 stop12h 43m
Deal found 8/4![Frontier logo]()
$232
This CheapOair deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:17 pm -
1 stop25h 19m
Fri 9/1112:38 pm -
1 stop28h 39m
Deal found 8/7![Frontier logo]()
$240
This Frontier deal was found by Cheapflights users on 8/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/52:41 pm -
1 stop21h 48m
Fri 9/112:50 pm -
1 stop13h 48m
Deal found 8/4![Frontier logo]()
$241
This CheapOair deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/91:21 pm -
1 stop25h 34m
Mon 9/142:50 pm -
1 stop13h 48m
Deal found 8/7![Frontier logo]()
$242
This Trip.com deal was found by Cheapflights users on 8/4. 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.
Thu 8/276:45 pm -
1 stop24h 36m
Mon 8/316:17 pm -
1 stop21h 33m
Deal found 8/4![Frontier logo]()
$244
This Trip.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:17 pm -
1 stop25h 19m
Mon 9/1412:39 pm -
1 stop20h 53m
Deal found 8/7![Frontier logo]()
$253
This Frontier deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:50 am -
1 stop9h 07m
Mon 10/263:52 pm -
1 stop12h 50m
Deal found 8/5![Frontier logo]()
$257
This CheapOair deal was found by Cheapflights users on 8/4. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/98:10 pm -
1 stop17h 33m
Sun 9/1312:24 pm -
1 stop20h 53m
Deal found 8/4![Frontier logo]()
$259
This Frontier deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:50 am -
1 stop9h 07m
Mon 10/193:52 pm -
1 stop12h 50m
Deal found 8/5![Frontier logo]()
$259
This CheapOair deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:55 pm -
1 stop18h 00m
Mon 9/212:50 pm -
1 stop13h 48m
Deal found 8/6![Frontier logo]()
$267
This Frontier deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:45 pm -
1 stop24h 36m
Thu 8/2712:20 pm -
1 stop28h 53m
Deal found 8/7![Frontier logo]()
$269
This CheapOair deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/161:21 pm -
1 stop25h 34m
Sun 9/202:50 pm -
1 stop13h 48m
Deal found 8/5![Frontier logo]()
$269
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 August 9, 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 August 9, 2026.
This CheapOair deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/128:10 pm -
1 stop22h 25m
Sun 11/159:03 pm -
1 stop23h 36m
Deal found 8/8![Frontier logo]()
$240
This Southwest deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/222:10 pm -
1 stop9h 20m
Mon 9/2812:10 pm -
Nonstop3h 20m
Deal found 8/6![Southwest logo]()
$341
This United Airlines deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/274:20 pm -
1 stop6h 57m
Sun 8/302:19 pm -
Nonstop4h 11m
Deal found 8/5![United Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/195:35 pm -
1 stop7h 20m
Sat 1/231:43 pm -
1 stop7h 27m
Deal found 8/5![Delta logo]()
$351
This Alaska Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/102:03 pm -
1 stop10h 25m
Tue 12/158:40 am -
1 stop9h 15m
Deal found 8/8![Alaska Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1212:08 pm -
1 stop9h 12m
Sun 9/206:01 am -
1 stop8h 26m
Deal found 8/8![American Airlines logo]()
$410
This Delta deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:04 am -
2 stops11h 10m
Tue 11/35:30 am -
1 stop5h 17m
Deal found 8/5![Delta logo]()
$356
This Southwest deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/910:30 am -
2 stops10h 20m
Mon 9/142:55 pm -
1 stop6h 05m
Deal found 8/7![Southwest logo]()
$356
This Alaska Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/298:00 am -
1 stop7h 44m
Fri 10/27:35 pm -
1 stop8h 45m
Deal found 8/8![Alaska Airlines logo]()
$359
This United Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:09 pm -
1 stop7h 43m
Sun 9/2011:02 pm -
1 stop9h 05m
Deal found 8/7![United Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/12:05 pm -
2 stops10h 53m
Tue 10/61:40 pm -
1 stop9h 12m
Deal found 8/5![Delta logo]()
$356
This Southwest deal was found by Cheapflights users on 8/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2612:20 pm -
2 stops9h 30m
Sat 8/2911:20 am -
2 stops8h 15m
Deal found 8/4![Southwest logo]()
$359
This United Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:29 am -
2 stops8h 34m
Sat 9/125:30 am -
2 stops9h 28m
Deal found 8/8![United Airlines logo]()
$360
This Alaska Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:08 pm -
Nonstop4h 12m
Sat 9/1211:16 am -
Nonstop3h 54m
Deal found 8/7![Alaska Airlines logo]()
$362
This Delta deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/195:20 pm -
1 stop7h 35m
Sat 1/2310:38 am -
2 stops10h 15m
Deal found 8/6![Delta logo]()
$356
This Southwest deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:35 am -
2 stops9h 55m
Sat 9/264:05 pm -
2 stops11h 25m
Deal found 8/5![Southwest logo]()
$361
This United Airlines deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/285:51 pm -
1 stop5h 49m
Mon 8/3112:24 pm -
Nonstop3h 38m
Deal found 8/5![United Airlines logo]()
$361
This Alaska Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/232:14 pm -
Nonstop4h 37m
Sun 10/2510:30 am -
1 stop11h 29m
Deal found 8/7![Alaska Airlines logo]()
$367
This KAYAK deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2212:10 pm -
1 stop8h 49m
Thu 8/275:59 am -
Nonstop4h 13m
Deal found 8/6![American Airlines logo]()
$448
This Delta deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/298:28 am -
2 stops8h 54m
Mon 8/3111:12 am -
1 stop6h 07m
Deal found 8/6![Delta logo]()
$356
This Southwest deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:20 am -
2 stops7h 30m
Sat 9/264:05 pm -
2 stops11h 25m
Deal found 8/5![Southwest logo]()
$361
This United Airlines deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/288:45 am -
1 stop6h 29m
Tue 9/19:00 am -
2 stops11h 43m
Deal found 8/5![United Airlines logo]()
$364
This Alaska Airlines deal was found by Cheapflights users on 8/4. 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.
Sat 11/77:00 am -
1 stop8h 14m
Tue 11/106:05 am -
1 stop6h 10m
Deal found 8/4![Alaska Airlines logo]()
$377
This Delta deal was found by Cheapflights users on 8/4. 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 9/126:00 am -
2 stops12h 05m
Sat 9/1911:49 am -
1 stop8h 41m
Deal found 8/4![Delta logo]()
$356
This Southwest deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/242:00 pm -
2 stops9h 55m
Mon 9/2812:10 pm -
Nonstop3h 20m
Deal found 8/7![Southwest logo]()
$366
This Alaska Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:00 pm -
1 stop15h 56m
Sat 10/37:20 am -
1 stop10h 33m
Deal found 8/8![Alaska Airlines logo]()
$379
This Delta deal was found by Cheapflights users on 8/4. 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 11/246:30 am -
1 stop7h 03m
Tue 12/11:43 pm -
1 stop9h 16m
Deal found 8/4![Delta logo]()
$358
This United Airlines deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:40 am -
1 stop7h 48m
Mon 9/711:02 pm -
1 stop9h 05m
Deal found 8/5![United Airlines logo]()
$394
This Southwest deal was found by Cheapflights users on 8/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:25 am -
2 stops10h 55m
Sat 10/1011:20 am -
2 stops9h 30m
Deal found 8/4![Southwest logo]()
$367
This Delta deal was found by Cheapflights users on 8/4. 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.
Sun 9/67:00 am -
1 stop8h 04m
Sun 9/1312:32 pm -
1 stop9h 25m
Deal found 8/4![Delta logo]()
$359
Last-minute flights from Illinois to OregonDiscover last-minute flight deals from Illinois to Oregon. Data last updated August 9, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Oregon. Data last updated August 9, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:45 pm -
1 stop24h 36m
Mon 8/246:17 pm -
1 stop21h 33m
Deal found 8/5![Frontier logo]()
$278
This Frontier deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:45 pm -
1 stop24h 36m
Thu 8/2712:20 pm -
1 stop28h 53m
Deal found 8/7![Frontier logo]()
$269
This CheapOair deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/262:41 pm -
1 stop21h 48m
Sun 8/3012:24 pm -
1 stop24h 12m
Deal found 8/5![Frontier logo]()
$271
This Trip.com deal was found by Cheapflights users on 8/4. 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.
Thu 8/276:45 pm -
1 stop24h 36m
Mon 8/316:17 pm -
1 stop21h 33m
Deal found 8/4![Frontier logo]()
$244
This CheapOair deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:58 pm -
1 stop23h 13m
Fri 9/1112:38 pm -
1 stop28h 39m
Deal found 8/7![Frontier logo]()
$290
This Frontier deal was found by Cheapflights users on 8/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/52:41 pm -
1 stop21h 48m
Fri 9/112:50 pm -
1 stop13h 48m
Deal found 8/4![Frontier logo]()
$241
This CheapOair deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:17 pm -
1 stop25h 19m
Fri 9/1112:38 pm -
1 stop28h 39m
Deal found 8/7![Frontier logo]()
$240
This CheapOair deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/91:21 pm -
1 stop25h 34m
Mon 9/142:50 pm -
1 stop13h 48m
Deal found 8/7![Frontier logo]()
$242
This Trip.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:17 pm -
1 stop25h 19m
Mon 9/1412:39 pm -
1 stop20h 53m
Deal found 8/7![Frontier logo]()
$253
This CheapOair deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/161:21 pm -
1 stop25h 34m
Sun 9/202:50 pm -
1 stop13h 48m
Deal found 8/5![Frontier logo]()
$269
This CheapOair deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:55 pm -
1 stop18h 00m
Mon 9/212:50 pm -
1 stop13h 48m
Deal found 8/6![Frontier logo]()
$267
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 9/185:19 pm -
2 stops20h 17m
Fri 9/2512:38 pm -
1 stop28h 39m
Deal found 8/4![Frontier logo]()
$283
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 August 9, 2026.
Search for one-way flight options from Illinois to Oregon. Find affordable one-way fares based on user searches. Data last updated August 9, 2026.
This Frontier deal was found by Cheapflights users on 8/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/57:00 am -
1 stop8h 57m
Deal found 8/4![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 8/4. 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.
Tue 10/208:10 pm -
1 stop22h 25m
Deal found 8/4![Frontier logo]()
$118
This Trip.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:10 pm -
1 stop22h 25m
Deal found 8/8![Frontier logo]()
$120
This Trip.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:58 pm -
1 stop23h 13m
Deal found 8/5![Frontier logo]()
$123
This Trip.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:45 pm -
1 stop20h 07m
Deal found 8/8![Frontier logo]()
$125
This CheapOair deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/266:45 pm -
1 stop20h 07m
Deal found 8/5![Frontier logo]()
$126
This CheapOair deal was found by Cheapflights users on 8/4. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:55 pm -
1 stop18h 00m
Deal found 8/4![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/88:10 pm -
1 stop22h 25m
Deal found 8/8![Frontier logo]()
$131
This CheapOair deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/71:21 pm -
1 stop26h 36m
Deal found 8/8![Frontier logo]()
$134
This Trip.com deal was found by Cheapflights users on 8/4. 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.
Thu 8/206:45 pm -
1 stop24h 36m
Deal found 8/4![Frontier logo]()
$143
This CheapOair deal was found by Cheapflights users on 8/4. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:45 pm -
1 stop18h 03m
Deal found 8/4![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:55 pm -
1 stop18h 00m
Deal found 8/8![Frontier logo]()
$148
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 August 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $232 (Frontier) |
One-way from | $116 (Frontier) |
Popular in | March |
Cheapest in | January |
Average price | $417 |
Good round-trip deal | $317 or less |
Good one-way deal | $203 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 August 9, 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 Lambert-St Louis - PDX Portland
STLPDX
Lambert-St Louis
Thu 11/12
8:10 pm-4:35 pm
1 stop22h 25m
Portland
Sun 11/15
9:03 pm-10:39 pm
1 stop23h 36m
$240
ChicagoBoise
MDW Chicago Midway - BOI Boise Air Term. Gowen Fld
MDWBOI
Chicago Midway
Tue 9/22
2:10 pm-10:30 pm
1 stop9h 20m
Boise Air Term. Gowen Fld
Mon 9/28
12:10 pm-4:30 pm
Nonstop3h 20m
$341
ChicagoEugene
ORD Chicago O'Hare Intl - EUG Eugene
ORDEUG
Chicago O'Hare Intl
Thu 8/27
4:20 pm-9:17 pm
1 stop6h 57m
Eugene
Sun 8/30
2:19 pm-8:30 pm
Nonstop4h 11m
$349
ChicagoBoise
MDW Chicago Midway - BOI Boise Air Term. Gowen Fld
MDWBOI
Chicago Midway
Tue 1/19
5:35 pm-11:55 pm
1 stop7h 20m
Boise Air Term. Gowen Fld
Sat 1/23
1:43 pm-10:10 pm
1 stop7h 27m
$351
ChicagoBoise
MDW Chicago Midway - BOI Boise Air Term. Gowen Fld
MDWBOI
Chicago Midway
Sat 10/31
6:04 am-4:14 pm
2 stops11h 10m
Boise Air Term. Gowen Fld
Tue 11/3
5:30 am-11:47 am
1 stop5h 17m
$356
ChicagoBoise
MDW Chicago Midway - BOI Boise Air Term. Gowen Fld
MDWBOI
Chicago Midway
Wed 9/9
10:30 am-7:50 pm
2 stops10h 20m
Boise Air Term. Gowen Fld
Mon 9/14
2:55 pm-10:00 pm
1 stop6h 05m
$356
ChicagoBoise
ORD Chicago O'Hare Intl - BOI Boise Air Term. Gowen Fld
ORDBOI
Chicago O'Hare Intl
Thu 10/1
2:05 pm-11:58 pm
2 stops10h 53m
Boise Air Term. Gowen Fld
Tue 10/6
1:40 pm-11:52 pm
1 stop9h 12m
$356
ChicagoBoise
ORD Chicago O'Hare Intl - BOI Boise Air Term. Gowen Fld
ORDBOI
Chicago O'Hare Intl
Tue 1/19
5:20 pm-11:55 pm
1 stop7h 35m
Boise Air Term. Gowen Fld
Sat 1/23
10:38 am-9:53 pm
2 stops10h 15m
$356
ChicagoBoise
ORD Chicago O'Hare Intl - BOI Boise Air Term. Gowen Fld
ORDBOI
Chicago O'Hare Intl
Sat 8/29
8:28 am-4:22 pm
2 stops8h 54m
Boise Air Term. Gowen Fld
Mon 8/31
11:12 am-6:19 pm
1 stop6h 07m
$356
MolinePortland
MLI Moline Quad-City - PDX Portland
MLIPDX
Moline Quad-City
Sat 9/12
6:00 am-4:05 pm
2 stops12h 05m
Portland
Sat 9/19
11:49 am-10:30 pm
1 stop8h 41m
$356
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-BOI
STL-PDX
MDW-BOI
ORD-MFR
ORD-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-BOI
STL-PDX
MDW-BOI
ORD-MFR
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 $309). Flying from Illinois to Oregon in June is currently the most expensive (average of $427). 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 August 9, 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 34% on airfare.
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 August 9, 2026.
The most flights from USIL to USOR are scheduled on a Friday (28 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (5 on average).
How much does it cost to fly round-trip from Illinois to Oregon?
Airfare is typical for this route at the moment.
Illinois to Oregon flights typically cost between $285 and $449 in October.The cheapest round-trip price found within the last 5 days was $292 on Frontier (Oct 14-Oct 20).
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 86 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 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 August 8, 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. Monday 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 August 9, 2026.
Read reviews from past customers who have flown Southwest,Alaska Airlines, andDelta from Illinois to Oregon. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
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.
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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 August 9, 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 7 airlines flying from Illinois to Oregon
Discover the top 7 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 August 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$150 | Average$317 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$191 | Average$218 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$205 | Average$453 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$212 | Average$513 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$213 | Average$457 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$227 | Average$372 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$256 | Average$464 | FlexibilityNo cancel fee | On-timeN/A |