$91+ 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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Jun 13 — Jun 201
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 14, 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 14, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 7/35:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Mon 7/68:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/11![Frontier logo]()
$188
This deal was found by Cheapflights users on 5/12. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/235:18 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Sat 7/258:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/12![Frontier logo]()
$189
This Frontier deal was found by Cheapflights users on 5/12. 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.
Tue 6/98:30 am
PHL
- ORD
1 stop12h 23m
Frontier
Wed 6/171:29 pm
ORD
- PHL
1 stop8h 00m
Frontier
Deal found 5/12![Frontier logo]()
$190
This Frontier deal was found by Cheapflights users on 5/12. 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.
Wed 7/224:30 pm
PHL
- MDW
1 stop6h 38m
Frontier
Wed 7/296:00 am
MDW
- PHL
1 stop5h 22m
Frontier
Deal found 5/12![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” 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 7/87:00 am
PHL
- ORD
1 stop18h 49m
Frontier
Thu 7/168:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/9![Frontier logo]()
$191
This Super.com deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/15:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Sat 6/68:00 pm
ORD
- PHL
Nonstop2h 27m
Frontier
Deal found 5/11![Frontier logo]()
$192
This Super.com deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/135:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Mon 6/158:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/11![Frontier logo]()
$193
This Expedia deal was found by Cheapflights users on 5/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/186:00 am
PHL
- ORD
1 stop7h 24m
Frontier
Sat 6/208:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/12![Frontier logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 5/13. 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 6/31:30 pm
PHL
- ORD
1 stop6h 59m
Frontier
Mon 7/278:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/13![Frontier logo]()
$195
This Frontier deal was found by Cheapflights users on 5/12. 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 5/295:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Tue 6/21:29 pm
ORD
- PHL
1 stop7h 41m
Frontier
Deal found 5/12![Frontier logo]()
$196
This Frontier deal was found by Cheapflights users on 5/13. 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.
Fri 7/105:18 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Mon 7/138:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/13![Frontier logo]()
$197
This Gotogate deal was found by Cheapflights users on 5/13. 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 Gotogate 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 6/258:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/13![Frontier logo]()
$198
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 14, 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 14, 2026.
This United Airlines deal was found by Cheapflights users on 5/13. 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 8/1110:30 am
PHL
- ORD
1 stop5h 00m
United Airlines
Sat 8/152:30 pm
ORD
- PHL
Nonstop2h 24m
United Airlines
Deal found 5/13![United Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 5/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:50 am
PHL
- ORD
1 stop10h 10m
Southwest
Thu 5/282:40 pm
ORD
- PHL
1 stop7h 05m
Southwest
Deal found 5/13![Southwest logo]()
$267
This Delta deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 8/56:15 am
PHL
- MLI
1 stop5h 10m
Delta
Mon 8/1011:08 am
MLI
- PHL
1 stop6h 34m
Delta
Deal found 5/11![Delta logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 5/13. 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 7/166:33 pm
PHL
- RFD
1 stop14h 16m
Multiple Airlines
Mon 7/207:50 pm
RFD
- PHL
1 stop12h 01m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$299
This American Airlines deal was found by Cheapflights users on 5/12. 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.
Sat 9/197:44 pm
PHL
- PIA
1 stop5h 32m
American Airlines
Sun 9/276:33 pm
PIA
- PHL
1 stop4h 26m
American Airlines
Deal found 5/12![American Airlines logo]()
$374
This Southwest deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 8/186:25 am
PHL
- STL
Nonstop2h 15m
Southwest
Tue 8/2510:55 am
STL
- PHL
Nonstop2h 10m
Southwest
Deal found 5/10![Southwest logo]()
$277
This United Airlines deal was found by Cheapflights users on 5/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:00 am
PHL
- ORD
Nonstop2h 30m
United Airlines
Sat 6/139:48 pm
ORD
- PHL
Nonstop2h 11m
United Airlines
Deal found 5/12![United Airlines logo]()
$298
This Southwest deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” 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 6/246:20 am
PHL
- STL
Nonstop2h 20m
Southwest
Tue 6/307:10 pm
STL
- PHL
Nonstop2h 10m
Southwest
Deal found 5/9![Southwest logo]()
$277
This Delta deal was found by Cheapflights users on 5/12. 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.
Mon 7/65:15 am
PHL
- BMI
1 stop7h 11m
Delta
Sat 7/254:14 pm
BMI
- PHL
1 stop7h 43m
Delta
Deal found 5/12![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/268:05 am
PHL
- ORD
Nonstop2h 29m
United Airlines
Wed 7/299:06 am
ORD
- PHL
Nonstop2h 19m
United Airlines
Deal found 5/11![United Airlines logo]()
$301
This Southwest deal was found by Cheapflights users on 5/12. 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.
Tue 6/305:05 pm
PHL
- STL
Nonstop2h 35m
Southwest
Tue 7/710:20 am
STL
- PHL
Nonstop2h 10m
Southwest
Deal found 5/12![Southwest logo]()
$277
This Delta deal was found by Cheapflights users on 5/13. 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 6/106:25 am
PHL
- BMI
1 stop6h 01m
Delta
Mon 6/156:00 am
BMI
- PHL
1 stop8h 03m
Delta
Deal found 5/13![Delta logo]()
$324
This United Airlines deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/127:00 pm
PHL
- ORD
Nonstop2h 32m
United Airlines
Tue 6/163:56 pm
ORD
- PHL
Nonstop2h 22m
United Airlines
Deal found 5/10![United Airlines logo]()
$301
This Southwest deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 8/126:25 pm
PHL
- MDW
Nonstop2h 05m
Southwest
Sat 8/1511:45 am
MDW
- PHL
Nonstop1h 55m
Southwest
Deal found 5/10![Southwest logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 5/13. 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 7/167:13 pm
PHL
- RFD
2 stops13h 36m
Multiple Airlines
Sun 7/1911:27 am
RFD
- PHL
1 stop12h 12m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$373
This Delta deal was found by Cheapflights users on 5/14. 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 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 6/134:19 pm
BMI
- PHL
1 stop7h 41m
Delta
Deal found 5/14![Delta logo]()
$324
This American Airlines deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/45:15 am
PHL
- CMI
1 stop6h 51m
American Airlines
Sat 6/136:43 pm
CMI
- PHL
1 stop4h 56m
American Airlines
Deal found 5/10![American Airlines logo]()
$400
This United Airlines deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/147:00 pm
PHL
- ORD
Nonstop2h 33m
United Airlines
Wed 6/173:56 pm
ORD
- PHL
Nonstop2h 22m
United Airlines
Deal found 5/11![United Airlines logo]()
$301
This Delta deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” 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 6/85:15 am
PHL
- STL
1 stop5h 31m
Delta
Sat 6/2010:16 am
STL
- PHL
1 stop4h 42m
Delta
Deal found 5/9![Delta logo]()
$339
This Southwest deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 8/257:15 am
PHL
- MDW
1 stop7h 15m
Southwest
Fri 8/281:00 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 5/11![Southwest logo]()
$311
This Kiwi.com deal was found by Cheapflights users on 5/12. 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.
Fri 6/58:00 am
PHL
- RFD
1 stop12h 03m
Multiple Airlines
Mon 6/87:53 pm
RFD
- PHL
1 stop11h 58m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$418
This American Airlines deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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.
Mon 7/204:55 pm
PHL
- EVV
1 stop5h 33m
American Airlines
Mon 7/276:55 pm
EVV
- PHL
1 stop5h 04m
American Airlines
Deal found 5/11![American Airlines logo]()
$427
This United Airlines deal was found by Cheapflights users on 5/13. 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.
Sat 6/138:05 am
PHL
- MLI
1 stop5h 31m
United Airlines
Tue 6/161:15 pm
MLI
- PHL
1 stop7h 04m
United Airlines
Deal found 5/13![United Airlines logo]()
$341
This Southwest deal was found by Cheapflights users on 5/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:10 pm
PHL
- MDW
1 stop6h 55m
Southwest
Fri 7/246:55 pm
MDW
- PHL
Nonstop1h 55m
Southwest
Deal found 5/13![Southwest logo]()
$311
This Kiwi.com deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” 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 6/118:43 pm
PHL
- RFD
1 stop12h 02m
Multiple Airlines
Mon 6/157:53 pm
RFD
- PHL
1 stop11h 58m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$424
This Delta deal was found by Cheapflights users on 5/12. 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.
Mon 9/215:12 pm
PHL
- BMI
1 stop6h 10m
Delta
Sat 9/2612:00 pm
BMI
- PHL
1 stop7h 43m
Delta
Deal found 5/12![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/136:00 am
PHL
- MLI
1 stop4h 59m
United Airlines
Sat 6/206:30 pm
MLI
- PHL
1 stop5h 29m
United Airlines
Deal found 5/11![United Airlines logo]()
$342
This Southwest deal was found by Cheapflights users on 5/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/84:45 pm
PHL
- STL
1 stop8h 10m
Southwest
Wed 6/109:40 am
STL
- PHL
2 stops6h 20m
Southwest
Deal found 5/14![Southwest logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 5/13. 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.
Fri 5/297:55 am
PHL
- RFD
1 stop12h 18m
Multiple Airlines
Sun 5/3111:27 am
RFD
- PHL
2 stops18h 45m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$430
This American Airlines deal was found by Cheapflights users on 5/13. 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 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
Sun 7/266:36 pm
CMI
- PHL
1 stop5h 23m
American Airlines
Deal found 5/13![American Airlines logo]()
$475
Last-minute flights from Philadelphia to IllinoisDiscover last-minute flight deals from Philadelphia to Illinois. Data last updated May 14, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Illinois. Data last updated May 14, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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.
Sun 5/245:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Fri 5/297:52 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/10![Frontier logo]()
$191
This Frontier deal was found by Cheapflights users on 5/12. 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 5/295:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Tue 6/21:29 pm
ORD
- PHL
1 stop7h 41m
Frontier
Deal found 5/12![Frontier logo]()
$196
This Frontier deal was found by Cheapflights users on 5/13. 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 5/305:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Sat 7/258:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/13![Frontier logo]()
$199
This Super.com deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/15:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Sat 6/68:00 pm
ORD
- PHL
Nonstop2h 27m
Frontier
Deal found 5/11![Frontier logo]()
$192
This Priceline deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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.
Tue 6/21:30 pm
PHL
- MDW
1 stop9h 32m
Frontier
Wed 6/312:04 pm
MDW
- PHL
1 stop6h 06m
Frontier
Deal found 5/11![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/21:30 pm
PHL
- ORD
1 stop6h 59m
Frontier
Tue 6/97:20 am
ORD
- PHL
1 stop22h 07m
Frontier
Deal found 5/11![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 5/13. 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 6/31:30 pm
PHL
- ORD
1 stop6h 59m
Frontier
Mon 7/278:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/13![Frontier logo]()
$195
This Frontier deal was found by Cheapflights users on 5/12. 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.
Tue 6/98:30 am
PHL
- ORD
1 stop12h 23m
Frontier
Wed 6/171:29 pm
ORD
- PHL
1 stop8h 00m
Frontier
Deal found 5/12![Frontier logo]()
$190
This Super.com deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/135:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Mon 6/158:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/11![Frontier logo]()
$193
This Gotogate deal was found by Cheapflights users on 5/13. 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 Gotogate 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 6/258:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/13![Frontier logo]()
$198
This Expedia deal was found by Cheapflights users on 5/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/186:00 am
PHL
- ORD
1 stop7h 24m
Frontier
Sat 6/208:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/12![Frontier logo]()
$194
This Super.com deal was found by Cheapflights users on 5/12. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/255:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Sat 6/278:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/12![Frontier logo]()
$189
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 14, 2026.
Search for one-way flight options from Philadelphia to Illinois. Find affordable one-way fares based on user searches. Data last updated May 14, 2026.
This Super.com deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/21:30 pm
PHL
- ORD
1 stop6h 59m
Frontier
Deal found 5/11![Frontier logo]()
$91
This Super.com deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/24:25 pm
PHL
- MDW
1 stop6h 37m
Frontier
Deal found 5/11![Frontier logo]()
$91
This Trip.com deal was found by Cheapflights users on 5/12. 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.
Wed 6/31:30 pm
PHL
- ORD
1 stop6h 59m
Frontier
Deal found 5/12![Frontier logo]()
$92
This iWofly deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/36:30 am
PHL
- MDW
1 stop5h 39m
Frontier
Deal found 5/11![Frontier logo]()
$93
This Super.com deal was found by Cheapflights users on 5/13. 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 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 5/13![Frontier logo]()
$94
This Super.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 6/164:35 pm
PHL
- MDW
1 stop6h 36m
Frontier
Deal found 5/10![Frontier logo]()
$94
This Super.com deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/35:04 pm
PHL
- STL
1 stop7h 53m
Frontier
Deal found 5/11![Frontier logo]()
$94
This Frontier deal was found by Cheapflights users on 5/12. 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.
Tue 6/94:35 pm
PHL
- MDW
1 stop6h 36m
Frontier
Deal found 5/12![Frontier logo]()
$95
This Frontier deal was found by Cheapflights users on 5/13. 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.
Wed 8/55:05 pm
PHL
- STL
1 stop7h 54m
Frontier
Deal found 5/13![Frontier logo]()
$95
This Super.com deal was found by Cheapflights users on 5/13. 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 Super.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
Deal found 5/13![Frontier logo]()
$97
This Frontier deal was found by Cheapflights users on 5/13. 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.
Mon 8/105:18 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 5/13![Frontier logo]()
$99
This Super.com deal was found by Cheapflights users on 5/13. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/98:30 am
PHL
- ORD
1 stop12h 23m
Frontier
Deal found 5/13![Frontier logo]()
$100
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 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $188 (Kiwi.com) |
One-way from | $91 (Super.com) |
Popular in | March |
Cheapest in | January |
Average price | $307 |
Good round-trip deal | $294 or less |
Good one-way deal | $149 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 14, 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
Tue 8/11
10:30 am-2:30 pm
1 stop5h 00m
Chicago O'Hare Intl
Sat 8/15
2:30 pm-5:54 pm
Nonstop2h 24m
$257
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Wed 5/27
5:50 am-3:00 pm
1 stop10h 10m
Chicago O'Hare Intl
Thu 5/28
2:40 pm-10:45 pm
1 stop7h 05m
$267
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Tue 8/18
6:25 am-7:40 am
Nonstop2h 15m
Lambert-St Louis
Tue 8/25
10:55 am-2:05 pm
Nonstop2h 10m
$277
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 6/24
6:20 am-7:40 am
Nonstop2h 20m
Lambert-St Louis
Tue 6/30
7:10 pm-10:20 pm
Nonstop2h 10m
$277
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Tue 6/30
5:05 pm-6:40 pm
Nonstop2h 35m
Lambert-St Louis
Tue 7/7
10:20 am-1:30 pm
Nonstop2h 10m
$277
Quickest round-trip
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Wed 8/12
6:25 pm-7:30 pm
Nonstop2h 05m
Chicago Midway
Sat 8/15
11:45 am-2:40 pm
Nonstop1h 55m
$279
PhiladelphiaMoline
PHL - MLI
PHLMLI
Philadelphia
Wed 8/5
6:15 am-10:25 am
1 stop5h 10m
Moline Quad-City
Mon 8/10
11:08 am-6:42 pm
1 stop6h 34m
$290
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Tue 6/2
6:00 am-7:30 am
Nonstop2h 30m
Chicago O'Hare Intl
Sat 6/13
9:48 pm-12:59 am
Nonstop2h 11m
$298
PhiladelphiaChicago
PHL - RFD
PHLRFD
Philadelphia
Thu 7/16
6:33 pm-7:49 am
1 stop14h 16m
Chicago Greater Rockford
Mon 7/20
7:50 pm-8:51 am
1 stop12h 01m
$299
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Sun 7/26
8:05 am-9:34 am
Nonstop2h 29m
Chicago O'Hare Intl
Wed 7/29
9:06 am-12:25 pm
Nonstop2h 19m
$301
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-MDW
PHL-STL
PHL-MLI
PHL-RFD
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-MDW
PHL-STL
PHL-MLI
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 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 $840). 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 14, 2026.
It’s optimal to fly from Philadelphia to Illinois in the evening. By choosing this option you can save up to 29% on the cost of your flight, compared to a flight at noon.
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 9, 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.
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 14, 2026.
The most flights from PHL to USIL are scheduled on a Monday (50 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 on average).
How much does it cost to fly round-trip from Philadelphia to Illinois?
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 14, 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.
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Overall
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Overall
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Overall
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Overall
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Overall
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Overall
8.0
Food
7.0
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
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
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 14, 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 14, 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$157 | Average$374 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$158 | Average$325 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$162 | Average$417 | FlexibilityNo cancel fee | On-time71% |