$81+ 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 6/19. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Jun 22 — Jun 291
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 23, 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 23, 2026.
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:18 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Mon 8/178:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/19![Frontier logo]()
$192
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/116:00 am
PHL
- ORD
1 stop7h 24m
Frontier
Sat 6/138:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/20![Frontier logo]()
$193
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 Super.com deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” 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 7/116:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Mon 7/138:58 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Deal found 5/22![Frontier logo]()
$196
This Frontier deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” 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 5/23![Frontier logo]()
$198
This Frontier deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” 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 6/135:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Mon 6/158:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/23![Frontier logo]()
$199
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.
Sun 6/145:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Sat 6/208:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/19![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 5/19. 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
Fri 7/248:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/19![Frontier logo]()
$202
This Frontier 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 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 6/138:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/20![Frontier logo]()
$204
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 7/97:27 pm
PHL
- ORD
1 stop11h 50m
Frontier
Mon 7/138:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/18![Frontier logo]()
$205
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.
Tue 6/306:30 am
PHL
- MDW
1 stop16h 41m
Frontier
Sat 7/1112:11 pm
MDW
- PHL
1 stop9h 17m
Frontier
Deal found 5/20![Frontier logo]()
$218
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 23, 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 23, 2026.
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/126:56 pm
PHL
- ORD
Nonstop2h 30m
United Airlines
Wed 9/166:13 pm
ORD
- PHL
Nonstop2h 14m
United Airlines
Deal found 5/18![United Airlines logo]()
$247
This Southwest deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” 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 9/53:45 pm
PHL
- MDW
Nonstop2h 00m
Southwest
Tue 9/85:55 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 5/22![Southwest logo]()
$247
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.
Wed 7/2912:36 pm
PHL
- ORD
1 stop4h 47m
Delta
Tue 8/46:40 am
ORD
- PHL
1 stop5h 43m
Delta
Deal found 5/19![Delta logo]()
$267
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 Kiwi.com deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” 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 7/292:59 pm
PHL
- RFD
1 stop20h 38m
Multiple Airlines
Sun 8/211:27 am
RFD
- PHL
2 stops18h 48m
Multiple Airlines
Deal found 5/21![Multiple Airlines logo]()
$345
This United Airlines deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/15:00 pm
PHL
- ORD
Nonstop2h 33m
United Airlines
Wed 8/511:33 am
ORD
- PHL
Nonstop2h 14m
United Airlines
Deal found 5/22![United Airlines logo]()
$247
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.
Wed 8/191:55 pm
PHL
- MDW
2 stops9h 25m
Southwest
Sat 8/227:55 am
MDW
- PHL
2 stops7h 15m
Southwest
Deal found 5/20![Southwest logo]()
$278
This United Airlines deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” 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 8/57:00 pm
PHL
- MLI
1 stop5h 16m
United Airlines
Sat 8/86:30 pm
MLI
- PHL
1 stop5h 27m
United Airlines
Deal found 5/23![United Airlines logo]()
$261
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 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.
Fri 7/176:10 am
PHL
- MDW
1 stop3h 58m
Delta
Tue 7/219:19 am
MDW
- PHL
1 stop6h 24m
Delta
Deal found 5/18![Delta logo]()
$321
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 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.
Sat 6/68:10 am
PHL
- RFD
1 stop27h 27m
Multiple Airlines
Mon 6/87:53 pm
RFD
- PHL
1 stop11h 58m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$353
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.
Mon 9/286:10 am
PHL
- ORD
Nonstop2h 25m
United Airlines
Tue 9/297:00 am
ORD
- PHL
Nonstop2h 11m
United Airlines
Deal found 5/19![United Airlines logo]()
$295
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/24:05 pm
PHL
- MLI
1 stop7h 25m
Delta
Mon 10/511:00 am
MLI
- PHL
1 stop5h 22m
Delta
Deal found 5/20![Delta logo]()
$329
This American Airlines deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” 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 6/208:20 am
PHL
- EVV
1 stop5h 01m
American Airlines
Sat 6/2712:46 pm
EVV
- PHL
1 stop4h 58m
American Airlines
Deal found 5/21![American Airlines logo]()
$331
This Southwest deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” 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 7/66:05 am
PHL
- MDW
1 stop4h 55m
Southwest
Sat 7/115:55 pm
MDW
- PHL
Nonstop2h 05m
Southwest
Deal found 5/21![Southwest logo]()
$305
This United Airlines deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” 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 7/111:38 am
PHL
- ORD
Nonstop2h 28m
United Airlines
Mon 7/69:45 pm
ORD
- PHL
Nonstop2h 12m
United Airlines
Deal found 5/22![United Airlines logo]()
$295
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 6/38:10 am
PHL
- RFD
1 stop27h 27m
Multiple Airlines
Wed 6/104:42 pm
RFD
- PHL
1 stop14h 02m
Multiple Airlines
Deal found 5/19![Multiple 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.
Thu 8/65:55 am
PHL
- MDW
1 stop6h 05m
Southwest
Tue 8/113:00 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 5/18![Southwest logo]()
$305
This American Airlines deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” 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.
Wed 6/107:36 am
PHL
- CMI
1 stop4h 27m
American Airlines
Sat 6/136:43 pm
CMI
- PHL
1 stop4h 56m
American Airlines
Deal found 5/22![American Airlines logo]()
$342
This Delta deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” 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 6/25:17 pm
PHL
- MLI
1 stop6h 04m
Delta
Sat 6/65:17 pm
MLI
- PHL
1 stop6h 40m
Delta
Deal found 5/22![Delta logo]()
$343
This United Airlines deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” 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 7/11:31 pm
PHL
- ORD
Nonstop2h 24m
United Airlines
Sun 7/57:15 am
ORD
- PHL
Nonstop2h 15m
United Airlines
Deal found 5/22![United Airlines logo]()
$301
This Southwest deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/111:25 am
PHL
- MDW
Nonstop2h 10m
Southwest
Mon 7/66:40 pm
MDW
- PHL
1 stop4h 45m
Southwest
Deal found 5/22![Southwest logo]()
$305
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:15 am
PHL
- CMI
1 stop6h 52m
American Airlines
Sat 8/16:34 pm
CMI
- PHL
1 stop5h 12m
American Airlines
Deal found 5/20![American Airlines logo]()
$342
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.
Fri 7/108:10 am
PHL
- RFD
1 stop11h 50m
Multiple Airlines
Mon 7/137:50 pm
RFD
- PHL
1 stop12h 01m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$388
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 5/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/315:28 pm
PHL
- ORD
1 stop4h 03m
Delta
Fri 8/282:12 pm
ORD
- PHL
1 stop4h 13m
Delta
Deal found 5/20![Delta logo]()
$383
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.
Thu 7/96:33 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]()
$395
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:25 am
PHL
- ORD
Nonstop2h 25m
United Airlines
Sat 8/229:45 pm
ORD
- PHL
Nonstop2h 14m
United Airlines
Deal found 5/18![United Airlines logo]()
$327
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.
Fri 7/34:55 pm
PHL
- EVV
1 stop5h 33m
American Airlines
Sun 7/55:22 am
EVV
- PHL
1 stop4h 50m
American Airlines
Deal found 5/18![American Airlines logo]()
$379
Last-minute flights from Philadelphia to IllinoisDiscover last-minute flight deals from Philadelphia to Illinois. Data last updated May 23, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Illinois. Data last updated May 23, 2026 and is based on user searches.
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 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.
Fri 5/295:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Fri 6/58:00 pm
ORD
- PHL
Nonstop2h 27m
Frontier
Deal found 5/20![Frontier logo]()
$229
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/295:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Sat 5/307:52 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/20![Frontier logo]()
$231
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/305:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Mon 6/17:52 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/19![Frontier logo]()
$238
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/81:32 pm
PHL
- MDW
1 stop9h 30m
Frontier
Thu 6/116:00 am
MDW
- PHL
1 stop12h 17m
Frontier
Deal found 5/18![Frontier logo]()
$223
This Kiwi.com deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” 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 6/118:30 am
PHL
- STL
1 stop10h 00m
Frontier
Sat 6/135:06 pm
STL
- PHL
1 stop13h 13m
Frontier
Deal found 5/21![Frontier logo]()
$226
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.
Sun 6/148:30 am
PHL
- STL
1 stop10h 00m
Frontier
Thu 6/184:17 pm
STL
- PHL
1 stop7h 27m
Frontier
Deal found 5/18![Frontier logo]()
$229
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/156:30 am
PHL
- MDW
1 stop5h 39m
Frontier
Mon 6/2212:04 pm
MDW
- PHL
1 stop9h 25m
Frontier
Deal found 5/18![Frontier logo]()
$228
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.
Sat 6/274:40 pm
PHL
- MDW
1 stop6h 31m
Frontier
Tue 6/3012:27 pm
MDW
- PHL
1 stop9h 02m
Frontier
Deal found 5/20![Frontier logo]()
$233
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.
Tue 6/306:30 am
PHL
- MDW
1 stop16h 41m
Frontier
Sat 7/1112:11 pm
MDW
- PHL
1 stop9h 17m
Frontier
Deal found 5/20![Frontier logo]()
$218
This Frontier deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” 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 6/306:30 am
PHL
- STL
1 stop12h 00m
Frontier
Wed 7/87:03 pm
STL
- PHL
1 stop9h 57m
Frontier
Deal found 5/22![Frontier logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” 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 6/306:30 am
PHL
- MDW
1 stop16h 41m
Frontier
Fri 7/312:04 pm
MDW
- PHL
1 stop6h 13m
Frontier
Deal found 5/21![Frontier logo]()
$237
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 23, 2026.
Search for one-way flight options from Philadelphia to Illinois. Find affordable one-way fares based on user searches. Data last updated May 23, 2026.
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.
Fri 6/194:40 pm
PHL
- STL
1 stop17h 12m
Frontier
Deal found 5/20![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” 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 8/94:30 pm
PHL
- STL
1 stop17h 27m
Frontier
Deal found 5/21![Frontier logo]()
$86
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.
Wed 7/154:30 pm
PHL
- STL
1 stop26h 07m
Frontier
Deal found 5/20![Frontier logo]()
$88
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 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.
Thu 5/285:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Deal found 5/20![Frontier logo]()
$97
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/265:18 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 5/20![Frontier logo]()
$98
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.
Fri 6/124:40 pm
PHL
- ORD
1 stop28h 10m
Frontier
Deal found 5/20![Frontier logo]()
$99
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.
Tue 6/168:30 am
PHL
- ORD
1 stop24h 33m
Frontier
Deal found 5/20![Frontier logo]()
$103
This Kiwi.com deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” 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 6/124:40 pm
PHL
- STL
1 stop17h 12m
Frontier
Deal found 5/21![Frontier logo]()
$104
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.
Fri 6/128:30 am
PHL
- MDW
1 stop27h 34m
Frontier
Deal found 5/20![Frontier logo]()
$105
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.
Mon 7/205:18 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 5/19![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 6/174:35 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 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $192 (Super.com) |
One-way from | $81 (Kiwi.com) |
Popular in | March |
Cheapest in | January |
Average price | $319 |
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 23, 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
Sat 9/12
6:56 pm-8:26 pm
Nonstop2h 30m
Chicago O'Hare Intl
Wed 9/16
6:13 pm-9:27 pm
Nonstop2h 14m
$247
Quickest round-trip
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Sat 9/5
3:45 pm-4:45 pm
Nonstop2h 00m
Chicago Midway
Tue 9/8
5:55 pm-8:55 pm
Nonstop2h 00m
$247
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Sat 8/1
5:00 pm-6:33 pm
Nonstop2h 33m
Chicago O'Hare Intl
Wed 8/5
11:33 am-2:47 pm
Nonstop2h 14m
$247
PhiladelphiaMoline
PHL - MLI
PHLMLI
Philadelphia
Wed 8/5
7:00 pm-11:16 pm
1 stop5h 16m
Moline Quad-City
Sat 8/8
6:30 pm-12:57 am
1 stop5h 27m
$261
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Wed 7/29
12:36 pm-4:23 pm
1 stop4h 47m
Chicago O'Hare Intl
Tue 8/4
6:40 am-1:23 pm
1 stop5h 43m
$267
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Wed 8/19
1:55 pm-10:20 pm
2 stops9h 25m
Chicago Midway
Sat 8/22
7:55 am-4:10 pm
2 stops7h 15m
$278
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
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 - ORD
PHLORD
Philadelphia
Mon 9/28
6:10 am-7:35 am
Nonstop2h 25m
Chicago O'Hare Intl
Tue 9/29
7:00 am-10:11 am
Nonstop2h 11m
$295
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Wed 7/1
11:38 am-1:06 pm
Nonstop2h 28m
Chicago O'Hare Intl
Mon 7/6
9:45 pm-12:57 am
Nonstop2h 12m
$295
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-MDW
PHL-RFD
PHL-MLI
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-MDW
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 $807). 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 23, 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.
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 May 23, 2026.
The most flights from PHL to USIL are scheduled on a Saturday (45 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (29 on average).
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 55 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 23, 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.
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
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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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 23, 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 23, 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% |