$68+ Cheap flights from Philadelphia (PHL) to Illinois
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 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Sep 16 — Sep 231
Round-trip
1 adult, Economy
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Find cheap flights from Philadelphia to Illinois 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 Philadelphia to IllinoisExplore the most affordable flight options available from Philadelphia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 17, 2026.
Explore the most affordable flight options available from Philadelphia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/148:41 am -
1 stop5h 29m
Mon 9/212:29 pm -
1 stop15h 47m
Deal found 8/15![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Wed 10/285:28 pm -
1 stop17h 12m
Tue 11/310:35 am -
1 stop6h 40m
Deal found 8/16![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/295:32 pm -
1 stop20h 38m
Mon 10/52:29 pm -
1 stop15h 47m
Deal found 8/13![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Wed 10/285:28 pm -
1 stop17h 12m
Sun 11/110:35 am -
1 stop20h 01m
Deal found 8/16![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 9/218:41 am -
1 stop5h 29m
Fri 9/252:29 pm -
1 stop26h 45m
Deal found 8/12![Frontier logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 8/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:38 pm -
1 stop25h 02m
Mon 10/196:35 pm -
1 stop11h 46m
Deal found 8/15![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Wed 9/308:41 am -
1 stop5h 29m
Fri 10/22:29 pm -
1 stop15h 47m
Deal found 8/13![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Mon 9/148:41 am -
1 stop5h 29m
Wed 9/162:29 pm -
1 stop7h 49m
Deal found 8/14![Frontier logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Sun 11/15:28 pm -
1 stop17h 12m
Tue 11/310:35 am -
1 stop6h 40m
Deal found 8/16![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Wed 9/238:41 am -
1 stop5h 29m
Fri 9/252:29 pm -
1 stop26h 45m
Deal found 8/13![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Thu 9/1012:40 pm -
1 stop25h 30m
Mon 9/142:29 pm -
1 stop15h 47m
Deal found 8/16![Frontier logo]()
$158
This CheapOair deal was found by Cheapflights users on 8/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/511:05 am -
Nonstop2h 36m
Mon 11/96:50 am -
Nonstop2h 10m
Deal found 8/14![Frontier logo]()
$166
Best flights from Philadelphia to IllinoisDiscover carefully curated flight deals from Philadelphia to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 17, 2026.
Discover carefully curated flight deals from Philadelphia to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 17, 2026.
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Tue 9/226:56 pm -
Nonstop2h 30m
Wed 9/2312:55 pm -
1 stop4h 59m
Deal found 8/13![United Airlines logo]()
$199
This Delta deal was found by Cheapflights users on 8/12. 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 9/266:15 am -
1 stop5h 22m
Tue 9/296:40 am -
1 stop7h 04m
Deal found 8/12![Delta logo]()
$209
This Southwest deal was found by Cheapflights users on 8/12. 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 9/92:45 pm -
2 stops8h 40m
Wed 9/162:00 pm -
2 stops6h 50m
Deal found 8/12![Southwest logo]()
$219
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 9/59:16 pm -
2 stops18h 47m
Thu 9/103:53 pm -
1 stop8h 14m
Deal found 8/12![Multiple Airlines logo]()
$290
This JetBlue deal was found by Cheapflights users on 8/16. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:00 am -
1 stop8h 39m
Sat 10/242:35 pm -
1 stop8h 09m
Deal found 8/16![JetBlue logo]()
$291
This American Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” 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 10/227:25 am -
1 stop7h 32m
Sat 10/242:30 pm -
1 stop5h 37m
Deal found 8/17![American Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 8/15. 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.
Thu 10/156:25 am -
Nonstop2h 20m
Mon 10/197:50 pm -
Nonstop2h 20m
Deal found 8/15![Southwest logo]()
$257
This Delta deal was found by Cheapflights users on 8/16. 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.
Sun 9/66:00 am -
1 stop5h 25m
Tue 9/155:16 pm -
1 stop6h 24m
Deal found 8/16![Delta logo]()
$271
This Southwest deal was found by Cheapflights users on 8/16. 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.
Mon 10/56:25 am -
Nonstop2h 20m
Fri 10/97:50 pm -
Nonstop2h 20m
Deal found 8/16![Southwest logo]()
$268
This Delta deal was found by Cheapflights users on 8/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:20 pm -
1 stop5h 39m
Wed 9/161:55 pm -
1 stop4h 24m
Deal found 8/13![Delta logo]()
$271
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/256:00 am -
1 stop12h 03m
Mon 9/287:36 pm -
2 stops26h 42m
Deal found 8/16![Multiple Airlines logo]()
$302
This JetBlue deal was found by Cheapflights users on 8/14. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/156:00 am -
1 stop8h 20m
Mon 11/233:20 pm -
1 stop7h 23m
Deal found 8/14![JetBlue logo]()
$304
This United Airlines deal was found by Cheapflights users on 8/16. 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 2/126:10 am -
1 stop5h 04m
Fri 2/192:26 pm -
1 stop6h 06m
Deal found 8/16![United Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 8/12. 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 11/116:00 am -
Nonstop2h 45m
Sat 11/1410:35 am -
Nonstop2h 10m
Deal found 8/12![Southwest logo]()
$276
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Wed 11/115:28 pm -
2 stops16h 12m
Sun 11/1510:30 am -
1 stop12h 13m
Deal found 8/14![Multiple Airlines logo]()
$307
This Delta deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” 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 10/285:20 am -
1 stop5h 58m
Sun 11/15:09 pm -
1 stop6h 46m
Deal found 8/17![Delta logo]()
$295
This American Airlines deal was found by Cheapflights users on 8/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/67:30 am -
1 stop4h 43m
Tue 9/156:00 am -
2 stops7h 40m
Deal found 8/16![American Airlines logo]()
$357
This Southwest deal was found by Cheapflights users on 8/15. 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.
Tue 9/151:45 pm -
Nonstop2h 05m
Wed 9/163:00 pm -
Nonstop2h 00m
Deal found 8/15![Southwest logo]()
$277
This United Airlines deal was found by Cheapflights users on 8/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:08 pm -
1 stop6h 30m
Sat 10/246:32 am -
1 stop7h 11m
Deal found 8/15![United Airlines logo]()
$351
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Sun 10/45:45 pm -
1 stop17h 09m
Wed 10/79:34 am -
1 stop10h 41m
Deal found 8/14![Multiple Airlines logo]()
$336
This Southwest deal was found by Cheapflights users on 8/16. 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.
Fri 1/81:15 pm -
Nonstop2h 30m
Mon 1/113:25 pm -
1 stop6h 10m
Deal found 8/16![Southwest logo]()
$278
This American Airlines deal was found by Cheapflights users on 8/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2210:30 am -
1 stop4h 27m
Sun 10/252:30 pm -
1 stop7h 22m
Deal found 8/15![American Airlines logo]()
$379
This Delta deal was found by Cheapflights users on 8/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/139:42 am -
1 stop3h 55m
Sun 2/145:30 am -
1 stop6h 33m
Deal found 8/13![Delta logo]()
$317
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/2411:04 am -
Nonstop2h 25m
Thu 9/244:00 pm -
Nonstop2h 24m
Deal found 8/16![United Airlines logo]()
$352
This Southwest deal was found by Cheapflights users on 8/15. 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.
Fri 10/166:25 am -
Nonstop2h 20m
Thu 10/222:00 pm -
1 stop6h 50m
Deal found 8/15![Southwest logo]()
$278
This Kiwi.com deal was found by Cheapflights users on 8/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:45 pm -
1 stop16h 07m
Sun 9/133:53 pm -
1 stop8h 14m
Deal found 8/15![Multiple Airlines logo]()
$355
This United Airlines deal was found by Cheapflights users on 8/16. 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.
Wed 10/211:24 pm -
Nonstop2h 26m
Sat 10/2411:25 am -
Nonstop2h 18m
Deal found 8/16![United Airlines logo]()
$357
This American Airlines deal was found by Cheapflights users on 8/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:43 am -
1 stop6h 08m
Mon 10/125:03 pm -
1 stop6h 08m
Deal found 8/12![American Airlines logo]()
$398
This Delta deal was found by Cheapflights users on 8/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:30 am -
1 stop7h 33m
Wed 9/235:57 pm -
1 stop5h 43m
Deal found 8/13![Delta logo]()
$341
This Southwest deal was found by Cheapflights users on 8/16. 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 10/2711:25 am -
2 stops8h 35m
Sat 10/317:00 am -
2 stops8h 00m
Deal found 8/16![Southwest logo]()
$287
Last-minute flights from Philadelphia to IllinoisDiscover last-minute flight deals from Philadelphia to Illinois. Data last updated August 17, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Illinois. Data last updated August 17, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Thu 9/36:30 am -
1 stop11h 52m
Fri 9/112:29 pm -
1 stop15h 47m
Deal found 8/13![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Thu 9/1012:40 pm -
1 stop25h 30m
Mon 9/142:29 pm -
1 stop15h 47m
Deal found 8/16![Frontier logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 8/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/148:41 am -
1 stop5h 29m
Mon 9/212:29 pm -
1 stop15h 47m
Deal found 8/15![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Mon 9/148:41 am -
1 stop5h 29m
Wed 9/162:29 pm -
1 stop7h 49m
Deal found 8/14![Frontier logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Mon 9/146:00 am -
1 stop6h 59m
Wed 9/166:25 am -
1 stop10h 49m
Deal found 8/13![Frontier logo]()
$166
This Frontier deal was found by Cheapflights users on 8/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/198:41 am -
1 stop10h 42m
Thu 10/17:25 am -
Nonstop2h 24m
Deal found 8/13![Frontier logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 9/218:41 am -
1 stop5h 29m
Fri 9/252:29 pm -
1 stop26h 45m
Deal found 8/12![Frontier logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Tue 9/2212:40 pm -
1 stop25h 30m
Mon 9/282:29 pm -
1 stop15h 47m
Deal found 8/14![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Wed 9/238:41 am -
1 stop5h 29m
Fri 9/252:29 pm -
1 stop26h 45m
Deal found 8/13![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/295:32 pm -
1 stop20h 38m
Mon 10/52:29 pm -
1 stop15h 47m
Deal found 8/13![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/295:32 pm -
1 stop20h 38m
Wed 10/72:29 pm -
1 stop7h 49m
Deal found 8/13![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Wed 9/308:41 am -
1 stop5h 29m
Fri 10/22:29 pm -
1 stop15h 47m
Deal found 8/13![Frontier logo]()
$152
One-way flights from Philadelphia to IllinoisSearch for one-way flight options from Philadelphia to Illinois. Find affordable one-way fares based on user searches. Data last updated August 17, 2026.
Search for one-way flight options from Philadelphia to Illinois. Find affordable one-way fares based on user searches. Data last updated August 17, 2026.
This Trip.com deal was found by Cheapflights users on 8/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/412:43 pm -
1 stop21h 57m
Deal found 8/16![Frontier logo]()
$68
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Wed 11/115:28 pm -
1 stop17h 12m
Deal found 8/12![Frontier logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 9/148:41 am -
1 stop5h 29m
Deal found 8/12![Frontier logo]()
$76
This Trip.com deal was found by Cheapflights users on 8/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/128:30 am -
1 stop10h 10m
Deal found 8/12![Frontier logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 9/1512:40 pm -
1 stop25h 30m
Deal found 8/12![Frontier logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Thu 10/86:03 pm -
1 stop24h 37m
Deal found 8/12![Frontier logo]()
$81
This Frontier deal was found by Cheapflights users on 8/12. 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.
Fri 10/95:15 am -
1 stop9h 01m
Deal found 8/12![Frontier logo]()
$104
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Wed 9/3011:57 am -
1 stop21h 43m
Deal found 8/14![Multiple Airlines logo]()
$104
This Frontier deal was found by Cheapflights users on 8/12. 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.
Fri 9/115:32 pm -
1 stop7h 12m
Deal found 8/12![Frontier logo]()
$104
This Delta deal was found by Cheapflights users on 8/12. 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 9/1512:07 pm -
1 stop7h 38m
Deal found 8/12![Delta logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Fri 10/236:00 am -
1 stop14h 06m
Deal found 8/14![Multiple Airlines logo]()
$105
This Frontier deal was found by Cheapflights users on 8/14. 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.
Sat 11/1412:43 pm -
1 stop10h 10m
Deal found 8/14![Frontier logo]()
$105
Find flight deals from Philadelphia to Illinois
Keep the following information in mind while searching for Philadelphia to Illinois flight deals. Data was last updated August 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $139 (Kiwi.com) |
One-way from | $68 (Trip.com) |
Popular in | June |
Cheapest in | January |
Average price | $277 |
Good round-trip deal | $279 or less |
Good one-way deal | $184 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Philadelphia to Illinois 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 17, 2026.
Use the filters below to find and compare flights from Philadelphia to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PhiladelphiaChicago
PHL Philadelphia - ORD Chicago O'Hare Intl
PHLORD
Philadelphia
Tue 9/22
6:56 pm-8:26 pm
Nonstop2h 30m
Chicago O'Hare Intl
Wed 9/23
12:55 pm-6:54 pm
1 stop4h 59m
$199
PhiladelphiaChicago
PHL Philadelphia - ORD Chicago O'Hare Intl
PHLORD
Philadelphia
Sat 9/26
6:15 am-10:37 am
1 stop5h 22m
Chicago O'Hare Intl
Tue 9/29
6:40 am-2:44 pm
1 stop7h 04m
$209
PhiladelphiaChicago
PHL Philadelphia - MDW Chicago Midway
PHLMDW
Philadelphia
Wed 9/9
2:45 pm-10:25 pm
2 stops8h 40m
Chicago Midway
Wed 9/16
2:00 pm-9:50 pm
2 stops6h 50m
$219
PhiladelphiaSt. Louis
PHL Philadelphia - STL Lambert-St Louis
PHLSTL
Philadelphia
Thu 10/15
6:25 am-7:45 am
Nonstop2h 20m
Lambert-St Louis
Mon 10/19
7:50 pm-11:10 pm
Nonstop2h 20m
$257
PhiladelphiaSt. Louis
PHL Philadelphia - STL Lambert-St Louis
PHLSTL
Philadelphia
Mon 10/5
6:25 am-7:45 am
Nonstop2h 20m
Lambert-St Louis
Fri 10/9
7:50 pm-11:10 pm
Nonstop2h 20m
$268
PhiladelphiaMoline
PHL Philadelphia - MLI Moline Quad-City
PHLMLI
Philadelphia
Sun 9/6
6:00 am-10:25 am
1 stop5h 25m
Moline Quad-City
Tue 9/15
5:16 pm-12:40 am
1 stop6h 24m
$271
PhiladelphiaChicago
PHL Philadelphia - ORD Chicago O'Hare Intl
PHLORD
Philadelphia
Mon 9/14
7:20 pm-11:59 pm
1 stop5h 39m
Chicago O'Hare Intl
Wed 9/16
1:55 pm-7:19 pm
1 stop4h 24m
$271
PhiladelphiaSt. Louis
PHL Philadelphia - STL Lambert-St Louis
PHLSTL
Philadelphia
Wed 11/11
6:00 am-7:45 am
Nonstop2h 45m
Lambert-St Louis
Sat 11/14
10:35 am-1:45 pm
Nonstop2h 10m
$276
Quickest round-trip
PhiladelphiaChicago
PHL Philadelphia - MDW Chicago Midway
PHLMDW
Philadelphia
Tue 9/15
1:45 pm-2:50 pm
Nonstop2h 05m
Chicago Midway
Wed 9/16
3:00 pm-6:00 pm
Nonstop2h 00m
$277
PhiladelphiaSt. Louis
PHL Philadelphia - STL Lambert-St Louis
PHLSTL
Philadelphia
Fri 1/8
1:15 pm-2:45 pm
Nonstop2h 30m
Lambert-St Louis
Mon 1/11
3:25 pm-10:35 pm
1 stop6h 10m
$278
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Philadelphia to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Philadelphia with our price prediction graph.
PHL-STL
PHL-ORD
PHL-RFD
PHL-MDW
PHL-BMI
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 Philadelphia to Illinois
PHL-USIL
PHL-STL
PHL-ORD
PHL-RFD
PHL-MDW
What is the cheapest month to book a flight from Philadelphia to Illinois?
Currently, November is the cheapest month in which you can book a flight from Philadelphia to Illinois (average of $238). Flying from Philadelphia to Illinois in June is currently the most expensive (average of $365). 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 PHL to IL?
Find hourly flight availability from Philadelphia to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 17, 2026.
It’s optimal to fly from Philadelphia to Illinois in the afternoon. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight in the morning.
Weekly flight availability from Philadelphia to Illinois
Explore weekly flight availability from Philadelphia to Illinois. 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 17, 2026.
The most flights from PHL to USIL are scheduled on a Friday (55 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (35 on average).
How much does it cost to fly round-trip from Philadelphia to Illinois?
Airfare is below average for this route at the moment.
Philadelphia to Illinois flights typically cost between $231 and $379 in November.The cheapest round-trip price found within the last 5 days was $166 on Frontier (Nov 5-Nov 9).
How far ahead should I book a flight from Philadelphia to Illinois?
Booking 64 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to Illinois. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest day to fly from Philadelphia to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Illinois. Price data was last updated on August 15, 2026.
Travelers seeking maximum savings on their Philadelphia to Illinois flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated August 17, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Philadelphia to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Related info for your journey
Find useful and relevant information for your journey from Philadelphia to Illinois. 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 Philadelphia to Illinois
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Complete your trip
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Search flights from Philadelphia to Illinois by cabin class
Find flights from Philadelphia to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Philadelphia and Illinois flights
Browse other Philadelphia and Illinois flight options. Last updated on August 17, 2026.
Popular flight searches
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Philadelphia to Illinois flights
Consider these flights traveling from Philadelphia to Illinois.
Top 5 airlines flying from Philadelphia to Illinois
Discover the top 5 airlines that operate flights from Philadelphia to Illinois. 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 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$75 | Average$184 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$133 | Average$266 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$176 | Average$393 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$176 | Average$351 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$177 | Average$369 | FlexibilityNo cancel fee | On-time63% |