$94+ 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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Jun 19 — Jun 261
Round-trip
1 adult, Economy
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Find cheap flights from Philadelphia to Illinois with Cheapflights
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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 May 20, 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 May 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/225:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Sat 6/208:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/16![Frontier logo]()
$192
This Frontier deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/88:30 am
PHL
- ORD
1 stop11h 59m
Frontier
Mon 7/278:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/16![Frontier logo]()
$193
This CheapOair deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 7/1611:35 am
PHL
- ORD
1 stop9h 52m
Frontier
Sat 7/188:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/18![Frontier logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 6/1011:00 am
PHL
- ORD
1 stop19h 07m
Frontier
Sat 6/138:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/19![Frontier logo]()
$195
This Frontier deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 7/185:18 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Thu 7/238:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/19![Frontier logo]()
$196
This Frontier deal was found by Cheapflights users on 5/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/245:18 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Thu 7/308:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/17![Frontier logo]()
$197
This Super.com deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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.
Thu 7/236:00 am
PHL
- ORD
1 stop7h 25m
Frontier
Mon 7/278:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/18![Frontier logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 5/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/55:18 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Mon 7/138:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/17![Frontier logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 5/16. 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.
Sat 6/137:00 am
PHL
- ORD
1 stop18h 48m
Frontier
Thu 7/238:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/16![Frontier logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 5/285:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Fri 5/298:05 am
ORD
- PHL
1 stop15h 39m
Frontier
Deal found 5/18![Frontier logo]()
$201
This Frontier deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 6/275:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Thu 7/28:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/18![Frontier logo]()
$202
This Super.com deal was found by Cheapflights users on 5/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/44:35 pm
PHL
- MDW
1 stop6h 36m
Frontier
Sat 7/1112:11 pm
MDW
- PHL
1 stop6h 09m
Frontier
Deal found 5/15![Frontier logo]()
$216
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 May 20, 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 May 20, 2026.
This Delta deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 5/249:45 am
PHL
- ORD
1 stop4h 11m
Delta
Thu 5/287:07 am
ORD
- PHL
1 stop8h 05m
Delta
Deal found 5/19![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 7/147:25 am
PHL
- STL
1 stop4h 50m
Southwest
Tue 7/217:10 pm
STL
- PHL
Nonstop2h 10m
Southwest
Deal found 5/18![Southwest logo]()
$287
This American Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 7/255:06 am
PHL
- MLI
1 stop6h 52m
American Airlines
Sat 8/811:39 am
MLI
- PHL
1 stop6h 32m
American Airlines
Deal found 5/19![American Airlines logo]()
$295
This United Airlines deal was found by Cheapflights users on 5/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/97:45 pm
PHL
- ORD
1 stop4h 41m
United Airlines
Tue 6/163:56 pm
ORD
- PHL
Nonstop2h 22m
United Airlines
Deal found 5/17![United Airlines logo]()
$308
This Kiwi.com deal was found by Cheapflights users on 5/16. 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.
Tue 6/24:25 pm
PHL
- RFD
2 stops17h 52m
Multiple Airlines
Thu 6/1111:27 am
RFD
- PHL
1 stop12h 17m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$316
This Delta deal was found by Cheapflights users on 5/17. 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.
Tue 7/2812:02 pm
PHL
- ORD
1 stop6h 10m
Delta
Tue 8/46:40 am
ORD
- PHL
1 stop5h 43m
Delta
Deal found 5/17![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” 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 7/182:50 pm
PHL
- MDW
Nonstop2h 05m
Southwest
Thu 7/237:35 am
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 5/20![Southwest logo]()
$295
This American Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 6/167:36 am
PHL
- CMI
1 stop4h 27m
American Airlines
Tue 6/236:43 pm
CMI
- PHL
1 stop4h 56m
American Airlines
Deal found 5/18![American Airlines logo]()
$306
This Kiwi.com deal was found by Cheapflights users on 5/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/54:30 pm
PHL
- RFD
2 stops19h 17m
Multiple Airlines
Sun 8/911:37 am
RFD
- PHL
1 stop12h 02m
Multiple Airlines
Deal found 5/17![Multiple Airlines logo]()
$324
This United Airlines deal was found by Cheapflights users on 5/15. 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 6/168:05 am
PHL
- ORD
Nonstop2h 29m
United Airlines
Tue 6/2311:33 am
ORD
- PHL
Nonstop2h 14m
United Airlines
Deal found 5/15![United Airlines logo]()
$327
This Southwest deal was found by Cheapflights users on 5/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/51:45 pm
PHL
- MDW
Nonstop2h 05m
Southwest
Sun 8/98:00 am
MDW
- PHL
Nonstop2h 10m
Southwest
Deal found 5/17![Southwest logo]()
$301
This Delta deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/315:15 am
PHL
- MLI
1 stop6h 07m
Delta
Mon 8/35:09 pm
MLI
- PHL
1 stop7h 03m
Delta
Deal found 5/15![Delta logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 5/16. 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 6/38:10 am
PHL
- RFD
1 stop27h 27m
Multiple Airlines
Wed 6/104:42 pm
RFD
- PHL
1 stop14h 02m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$329
This Southwest deal was found by Cheapflights users on 5/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/218:00 am
PHL
- MDW
Nonstop2h 05m
Southwest
Tue 8/258:30 am
MDW
- PHL
Nonstop2h 05m
Southwest
Deal found 5/17![Southwest logo]()
$301
This Delta deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/116:25 am
PHL
- BMI
1 stop6h 01m
Delta
Sat 6/1312:09 pm
BMI
- PHL
1 stop5h 48m
Delta
Deal found 5/15![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 8/2511:03 am
PHL
- MLI
1 stop7h 12m
United Airlines
Sat 8/295:09 pm
MLI
- PHL
1 stop6h 50m
United Airlines
Deal found 5/19![United Airlines logo]()
$341
This American Airlines deal was found by Cheapflights users on 5/17. 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 7/235:15 am
PHL
- CMI
1 stop6h 52m
American Airlines
Sat 7/256:34 pm
CMI
- PHL
1 stop5h 12m
American Airlines
Deal found 5/17![American Airlines logo]()
$345
This Southwest deal was found by Cheapflights users on 5/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/115:25 am
PHL
- MDW
2 stops7h 35m
Southwest
Wed 7/158:20 am
MDW
- PHL
1 stop4h 10m
Southwest
Deal found 5/17![Southwest logo]()
$304
This Kiwi.com deal was found by Cheapflights users on 5/15. 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.
Wed 7/16:00 am
PHL
- RFD
1 stop29h 37m
Multiple Airlines
Sun 7/511:27 am
RFD
- PHL
1 stop12h 12m
Multiple Airlines
Deal found 5/15![Multiple Airlines logo]()
$338
This Delta deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 6/306:25 am
PHL
- BMI
1 stop6h 01m
Delta
Sun 7/54:19 pm
BMI
- PHL
1 stop7h 40m
Delta
Deal found 5/18![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 5/15. 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.
Mon 6/227:45 pm
PHL
- ORD
1 stop4h 41m
United Airlines
Tue 6/239:48 pm
ORD
- PHL
Nonstop2h 11m
United Airlines
Deal found 5/15![United Airlines logo]()
$364
This Southwest deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 6/296:00 pm
PHL
- MDW
1 stop6h 00m
Southwest
Tue 6/303:40 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 5/18![Southwest logo]()
$305
This Kiwi.com deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” 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 7/56:33 pm
PHL
- RFD
1 stop14h 16m
Multiple Airlines
Sun 7/1211:27 am
RFD
- PHL
1 stop12h 12m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 6/306:25 am
PHL
- BMI
1 stop6h 01m
Delta
Thu 7/94:14 pm
BMI
- PHL
1 stop7h 43m
Delta
Deal found 5/18![Delta logo]()
$309
This American Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 8/137:36 am
PHL
- BMI
1 stop6h 30m
American Airlines
Mon 8/171:41 pm
BMI
- PHL
1 stop4h 30m
American Airlines
Deal found 5/19![American Airlines logo]()
$384
This United Airlines deal was found by Cheapflights users on 5/15. 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.
Wed 6/108:05 am
PHL
- ORD
Nonstop2h 29m
United Airlines
Thu 6/119:06 am
ORD
- PHL
Nonstop2h 19m
United Airlines
Deal found 5/15![United Airlines logo]()
$371
This Southwest deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 6/165:05 pm
PHL
- MDW
1 stop6h 30m
Southwest
Tue 6/237:45 am
MDW
- PHL
Nonstop2h 05m
Southwest
Deal found 5/19![Southwest logo]()
$308
This Delta deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 6/306:25 am
PHL
- BMI
1 stop6h 01m
Delta
Tue 7/74:14 pm
BMI
- PHL
1 stop7h 43m
Delta
Deal found 5/18![Delta logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 5/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/243:49 pm
PHL
- RFD
2 stops19h 48m
Multiple Airlines
Sun 6/2811:27 am
RFD
- PHL
1 stop12h 17m
Multiple Airlines
Deal found 5/17![Multiple Airlines logo]()
$345
This deal was found by Cheapflights users on 5/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/108:05 am
PHL
- PAH
1 stop5h 54m
United Airlines
Sun 6/145:00 am
PAH
- PHL
1 stop4h 25m
United Airlines
Deal found 5/15![United Airlines logo]()
$374
Last-minute flights from Philadelphia to IllinoisDiscover last-minute flight deals from Philadelphia to Illinois. Data last updated May 20, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Illinois. Data last updated May 20, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 5/16. 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 5/215:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Sun 5/247:52 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/16![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/225:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Sat 6/208:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/16![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 5/285:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Fri 5/298:05 am
ORD
- PHL
1 stop15h 39m
Frontier
Deal found 5/18![Frontier logo]()
$201
This Frontier deal was found by Cheapflights users on 5/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Sat 7/49:13 pm
ORD
- PHL
1 stop11h 08m
Frontier
Deal found 5/17![Frontier logo]()
$203
This Frontier deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/88:30 am
PHL
- ORD
1 stop11h 59m
Frontier
Mon 7/278:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/16![Frontier logo]()
$193
This Super.com deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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.
Mon 6/85:05 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Thu 6/118:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/18![Frontier logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 6/1011:00 am
PHL
- ORD
1 stop19h 07m
Frontier
Sat 6/138:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/19![Frontier logo]()
$195
This Frontier deal was found by Cheapflights users on 5/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/115:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Tue 6/161:29 pm
ORD
- PHL
1 stop8h 00m
Frontier
Deal found 5/17![Frontier logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 5/16. 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.
Sat 6/137:00 am
PHL
- ORD
1 stop18h 48m
Frontier
Thu 7/238:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/16![Frontier logo]()
$200
This Frontier deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 6/181:32 pm
PHL
- ORD
1 stop7h 18m
Frontier
Sat 6/208:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/18![Frontier logo]()
$199
This Expedia deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/247:00 am
PHL
- ORD
1 stop18h 48m
Frontier
Sat 6/278:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/15![Frontier logo]()
$194
This Frontier deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 6/275:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Thu 7/28:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/18![Frontier logo]()
$202
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 May 20, 2026.
Search for one-way flight options from Philadelphia to Illinois. Find affordable one-way fares based on user searches. Data last updated May 20, 2026.
This Booking.com deal was found by Cheapflights users on 5/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Deal found 5/17![Frontier logo]()
$94
This Super.com deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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.
Tue 7/145:59 pm
PHL
- STL
1 stop7h 00m
Frontier
Deal found 5/18![Frontier logo]()
$94
This Super.com deal was found by Cheapflights users on 5/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/811:06 am
PHL
- STL
1 stop28h 01m
Frontier
Deal found 5/15![Frontier logo]()
$96
This FlightHub deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/275:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Deal found 5/19![Frontier logo]()
$97
This Frontier deal was found by Cheapflights users on 5/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:18 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 5/17![Frontier logo]()
$99
This Booking.com deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/285:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Deal found 5/20![Frontier logo]()
$101
This Frontier deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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.
Tue 8/118:30 am
PHL
- STL
1 stop10h 07m
Frontier
Deal found 5/18![Frontier logo]()
$101
This Super.com deal was found by Cheapflights users on 5/17. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/195:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Deal found 5/17![Frontier logo]()
$103
This Frontier deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/105:18 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 5/16![Frontier logo]()
$104
This Super.com deal was found by Cheapflights users on 5/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/84:25 pm
PHL
- MDW
1 stop6h 37m
Frontier
Deal found 5/15![Frontier logo]()
$104
This Super.com deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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.
Wed 7/87:27 pm
PHL
- ORD
1 stop11h 50m
Frontier
Deal found 5/18![Frontier logo]()
$106
This Super.com deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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.
Wed 6/104:35 pm
PHL
- MDW
1 stop6h 36m
Frontier
Deal found 5/18![Frontier logo]()
$106
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 May 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $192 (Kiwi.com) |
One-way from | $94 (Booking.com) |
Popular in | March |
Cheapest in | January |
Average price | $317 |
Good round-trip deal | $296 or less |
Good one-way deal | $154 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 May 20, 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 - ORD
PHLORD
Philadelphia
Sun 5/24
9:45 am-12:56 pm
1 stop4h 11m
Chicago O'Hare Intl
Thu 5/28
7:07 am-4:12 pm
1 stop8h 05m
$267
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Tue 7/28
12:02 pm-5:12 pm
1 stop6h 10m
Chicago O'Hare Intl
Tue 8/4
6:40 am-1:23 pm
1 stop5h 43m
$267
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Tue 7/14
7:25 am-11:15 am
1 stop4h 50m
Lambert-St Louis
Tue 7/21
7:10 pm-10:20 pm
Nonstop2h 10m
$287
PhiladelphiaMoline
PHL - MLI
PHLMLI
Philadelphia
Sat 7/25
5:06 am-10:58 am
1 stop6h 52m
Moline Quad-City
Sat 8/8
11:39 am-7:11 pm
1 stop6h 32m
$295
Quickest round-trip
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Sat 7/18
2:50 pm-3:55 pm
Nonstop2h 05m
Chicago Midway
Thu 7/23
7:35 am-10:35 am
Nonstop2h 00m
$295
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Wed 8/5
1:45 pm-2:50 pm
Nonstop2h 05m
Chicago Midway
Sun 8/9
8:00 am-11:10 am
Nonstop2h 10m
$301
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Fri 8/21
8:00 am-9:05 am
Nonstop2h 05m
Chicago Midway
Tue 8/25
8:30 am-11:35 am
Nonstop2h 05m
$301
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Sat 7/11
5:25 am-12:00 pm
2 stops7h 35m
Chicago Midway
Wed 7/15
8:20 am-1:30 pm
1 stop4h 10m
$304
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Mon 6/29
6:00 pm-11:00 pm
1 stop6h 00m
Chicago Midway
Tue 6/30
3:40 pm-6:40 pm
Nonstop2h 00m
$305
PhiladelphiaChampaign
PHL - CMI
PHLCMI
Philadelphia
Tue 6/16
7:36 am-11:03 am
1 stop4h 27m
Champaign University-Willard
Tue 6/23
6:43 pm-12:39 am
1 stop4h 56m
$306
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-ORD
PHL-STL
PHL-MLI
PHL-RFD
PHL-MDW
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-ORD
PHL-STL
PHL-MLI
PHL-RFD
What is the cheapest month to book a flight from Philadelphia to Illinois?
Currently, February is the cheapest month in which you can book a flight from Philadelphia to Illinois (average of $40). Flying from Philadelphia to Illinois in December is currently the most expensive (average of $820). 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 May 20, 2026.
It’s optimal to fly from Philadelphia to Illinois in the evening. By choosing this option you can save up to 28% on the cost of your flight, compared to a flight at noon.
How much does it cost to fly round-trip from Philadelphia to Illinois?
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 May 16, 2026.
Travelers seeking maximum savings on their Philadelphia to Illinois flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday afternoons 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 May 20, 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.
Food
7.0
Crew
8.6
Overall
7.9
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Crew
8.6
Overall
7.9
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Crew
8.6
Overall
7.9
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Crew
8.6
Overall
7.9
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Crew
8.6
Overall
7.9
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Crew
8.6
Overall
7.9
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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 May 20, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 May 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$77 | Average$172 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$83 | Average$266 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$158 | Average$327 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$162 | Average$347 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$162 | Average$386 | FlexibilityNo cancel fee | On-time71% |