$74+ 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Mar 26 — Apr 21
1 adult, Economy
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Find cheap flights from Philadelphia to Illinois with Cheapflights
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Philadelphia to IllinoisExplore the most affordable flight options available from Philadelphia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 24, 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 February 24, 2026.
This United Airlines deal was found by Cheapflights users on 2/22. 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 5/96:10 am
PHL
- ORD
Nonstop2h 29m
United Airlines
Thu 5/149:00 am
ORD
- PHL
Nonstop2h 14m
United Airlines
Deal found 2/22![United Airlines logo]()
$140
This Frontier deal was found by Cheapflights users on 2/22. 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.
Mon 4/1312:10 pm
PHL
- ORD
1 stop11h 29m
Frontier
Fri 4/172:20 pm
ORD
- PHL
Nonstop2h 14m
Frontier
Deal found 2/22![Frontier logo]()
$142
This Mytrip deal was found by Cheapflights users on 2/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/134:11 pm
PHL
- ORD
1 stop8h 25m
Frontier
Thu 4/162:20 pm
ORD
- PHL
Nonstop2h 14m
Frontier
Deal found 2/20![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/221:30 pm
PHL
- ORD
1 stop8h 47m
Multiple Airlines
Sat 4/251:27 pm
ORD
- PHL
1 stop9h 32m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 2/20. 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 4/211:30 pm
PHL
- ORD
1 stop8h 47m
Frontier
Thu 4/235:10 am
ORD
- PHL
Nonstop2h 14m
Frontier
Deal found 2/20![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:34 pm
PHL
- ORD
Nonstop2h 34m
Frontier
Mon 5/112:20 pm
ORD
- PHL
Nonstop2h 14m
Frontier
Deal found 2/23![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/205:05 am
PHL
- ORD
1 stop6h 39m
Frontier
Wed 5/277:04 pm
ORD
- PHL
Nonstop2h 30m
Frontier
Deal found 2/23![Frontier logo]()
$148
This Frontier deal was found by Cheapflights users on 2/23. 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.
Tue 5/195:05 am
PHL
- ORD
1 stop6h 39m
Frontier
Sat 5/308:04 pm
ORD
- PHL
Nonstop2h 33m
Frontier
Deal found 2/23![Frontier logo]()
$149
This Frontier deal was found by Cheapflights users on 2/20. 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 7/255:24 pm
PHL
- ORD
Nonstop2h 40m
Frontier
Tue 7/287:04 pm
ORD
- PHL
Nonstop2h 30m
Frontier
Deal found 2/20![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 2/21. 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 4/169:00 pm
PHL
- ORD
1 stop26h 53m
Frontier
Mon 4/201:27 pm
ORD
- PHL
1 stop30h 13m
Frontier
Deal found 2/21![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/175:45 am
PHL
- ORD
1 stop6h 52m
Multiple Airlines
Mon 4/202:20 pm
ORD
- PHL
Nonstop2h 14m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$152
This Frontier deal was found by Cheapflights users on 2/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/124:24 pm
PHL
- ORD
Nonstop2h 45m
Frontier
Sat 8/158:04 pm
ORD
- PHL
Nonstop2h 33m
Frontier
Deal found 2/21![Frontier logo]()
$153
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 February 24, 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 February 24, 2026.
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/186:10 am
PHL
- ORD
Nonstop2h 29m
United Airlines
Tue 5/199:44 pm
ORD
- PHL
Nonstop2h 06m
United Airlines
Deal found 2/20![United Airlines logo]()
$177
This Delta deal was found by Cheapflights users on 2/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/119:40 am
PHL
- ORD
1 stop4h 44m
Delta
Sat 4/115:40 pm
ORD
- PHL
1 stop4h 20m
Delta
Deal found 2/23![Delta logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 2/21. 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 4/86:08 pm
PHL
- RFD
1 stop16h 39m
Multiple Airlines
Mon 4/137:09 pm
RFD
- PHL
1 stop18h 37m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$223
This Southwest deal was found by Cheapflights users on 2/20. 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.
Fri 4/247:10 pm
PHL
- MDW
1 stop4h 35m
Southwest
Sun 4/267:15 pm
MDW
- PHL
Nonstop1h 55m
Southwest
Deal found 2/20![Southwest logo]()
$227
This American Airlines deal was found by Cheapflights users on 2/21. 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 3/148:35 am
PHL
- PIA
1 stop4h 43m
American Airlines
Tue 3/176:50 pm
PIA
- PHL
1 stop4h 04m
American Airlines
Deal found 2/21![American Airlines logo]()
$339
This United Airlines deal was found by Cheapflights users on 2/22. 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 4/224:55 pm
PHL
- ORD
Nonstop2h 28m
United Airlines
Sat 4/258:45 am
ORD
- PHL
1 stop4h 26m
United Airlines
Deal found 2/22![United Airlines logo]()
$185
This Delta deal was found by Cheapflights users on 2/20. 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.
Sat 4/46:05 am
PHL
- ORD
1 stop4h 05m
Delta
Sat 4/45:40 pm
ORD
- PHL
1 stop4h 20m
Delta
Deal found 2/20![Delta logo]()
$237
This Southwest deal was found by Cheapflights users on 2/21. 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.
Thu 4/236:00 pm
PHL
- MDW
Nonstop2h 10m
Southwest
Sun 4/267:15 pm
MDW
- PHL
Nonstop1h 55m
Southwest
Deal found 2/21![Southwest logo]()
$257
This Delta deal was found by Cheapflights users on 2/22. 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.
Sat 4/1810:31 am
PHL
- MLI
1 stop6h 57m
Delta
Sat 4/255:11 pm
MLI
- PHL
1 stop6h 48m
Delta
Deal found 2/22![Delta logo]()
$251
This Southwest deal was found by Cheapflights users on 2/20. 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.
Mon 5/186:10 am
PHL
- MDW
1 stop9h 45m
Southwest
Tue 5/192:50 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 2/20![Southwest logo]()
$264
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/111:36 am
PHL
- ORD
Nonstop2h 28m
United Airlines
Mon 4/67:15 am
ORD
- PHL
Nonstop2h 13m
United Airlines
Deal found 2/20![United Airlines logo]()
$270
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/75:28 pm
PHL
- RFD
1 stop16h 19m
Multiple Airlines
Thu 3/1210:37 am
RFD
- PHL
1 stop12h 19m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$297
This Delta deal was found by Cheapflights users on 2/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/136:25 pm
PHL
- MLI
1 stop5h 05m
Delta
Wed 3/185:15 pm
MLI
- PHL
1 stop6h 42m
Delta
Deal found 2/21![Delta logo]()
$265
This Southwest deal was found by Cheapflights users on 2/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/92:15 pm
PHL
- MDW
Nonstop2h 10m
Southwest
Mon 4/136:45 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 2/23![Southwest logo]()
$265
This American Airlines deal was found by Cheapflights users on 2/20. 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.
Mon 3/306:40 pm
PHL
- EVV
1 stop6h 13m
American Airlines
Tue 4/75:50 pm
EVV
- PHL
1 stop4h 52m
American Airlines
Deal found 2/20![American Airlines logo]()
$342
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/2110:35 am
PHL
- ORD
1 stop4h 58m
United Airlines
Tue 3/2411:20 am
ORD
- PHL
Nonstop2h 04m
United Airlines
Deal found 2/20![United Airlines logo]()
$292
This Delta deal was found by Cheapflights users on 2/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/224:05 pm
PHL
- MLI
1 stop7h 25m
Delta
Tue 8/2511:00 am
MLI
- PHL
1 stop6h 29m
Delta
Deal found 2/23![Delta logo]()
$269
This Kiwi.com deal was found by Cheapflights users on 2/21. 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.
Sat 3/216:08 pm
PHL
- RFD
1 stop16h 39m
Multiple Airlines
Mon 3/237:23 pm
RFD
- PHL
1 stop14h 16m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$330
This Southwest deal was found by Cheapflights users on 2/21. 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.
Sat 5/96:15 am
PHL
- ORD
2 stops10h 15m
Southwest
Tue 5/121:35 pm
ORD
- PHL
1 stop8h 05m
Southwest
Deal found 2/21![Southwest logo]()
$273
This Delta deal was found by Cheapflights users on 2/22. 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.
Wed 3/115:00 pm
PHL
- MLI
1 stop6h 30m
Delta
Mon 3/165:15 pm
MLI
- PHL
1 stop6h 42m
Delta
Deal found 2/22![Delta logo]()
$274
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/44:55 pm
PHL
- ORD
Nonstop2h 28m
United Airlines
Sun 4/59:04 am
ORD
- PHL
Nonstop2h 13m
United Airlines
Deal found 2/20![United Airlines logo]()
$306
This Kiwi.com deal was found by Cheapflights users on 2/21. 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 3/115:18 pm
PHL
- RFD
1 stop17h 29m
Multiple Airlines
Sun 3/1510:37 am
RFD
- PHL
2 stops20h 30m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$340
This Southwest deal was found by Cheapflights users on 2/21. 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.
Fri 5/86:00 pm
PHL
- MDW
Nonstop2h 10m
Southwest
Wed 5/132:50 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 2/21![Southwest logo]()
$283
This United Airlines deal was found by Cheapflights users on 2/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/110:00 am
PHL
- ORD
Nonstop2h 28m
United Airlines
Sun 4/59:40 pm
ORD
- PHL
Nonstop2h 05m
United Airlines
Deal found 2/21![United Airlines logo]()
$306
This American Airlines deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 3/274:33 pm
PHL
- CMI
1 stop5h 57m
American Airlines
Tue 3/313:47 pm
CMI
- PHL
1 stop4h 01m
American Airlines
Deal found 2/24![American Airlines logo]()
$430
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 3/185:00 am
PHL
- RFD
1 stop9h 54m
Multiple Airlines
Thu 3/1910:37 am
RFD
- PHL
1 stop11h 22m
Multiple Airlines
Deal found 2/24![Multiple Airlines logo]()
$366
This Southwest deal was found by Cheapflights users on 2/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/136:35 pm
PHL
- STL
Nonstop2h 25m
Southwest
Sat 5/166:55 pm
STL
- PHL
Nonstop2h 10m
Southwest
Deal found 2/23![Southwest logo]()
$303
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/1410:35 am
PHL
- ORD
1 stop4h 58m
United Airlines
Tue 3/1711:20 am
ORD
- PHL
Nonstop2h 04m
United Airlines
Deal found 2/20![United Airlines logo]()
$313
This American Airlines deal was found by Cheapflights users on 2/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/175:12 pm
PHL
- CMI
1 stop5h 23m
American Airlines
Tue 4/212:38 pm
CMI
- PHL
1 stop6h 46m
American Airlines
Deal found 2/23![American Airlines logo]()
$430
This Delta deal was found by Cheapflights users on 2/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/75:17 am
PHL
- EVV
1 stop5h 13m
Delta
Sat 5/93:00 pm
EVV
- PHL
1 stop4h 49m
Delta
Deal found 2/23![Delta logo]()
$342
Last-minute flights from Philadelphia to IllinoisDiscover last-minute flight deals from Philadelphia to Illinois. Data last updated February 24, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Illinois. Data last updated February 24, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 2/20. 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.
Tue 3/105:55 pm
PHL
- ORD
1 stop6h 43m
Frontier
Wed 3/118:15 am
ORD
- PHL
1 stop8h 01m
Frontier
Deal found 2/20![Frontier logo]()
$160
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/105:26 pm
PHL
- ORD
1 stop7h 21m
Spirit Airlines
Tue 3/176:10 pm
ORD
- PHL
1 stop13h 29m
Spirit Airlines
Deal found 2/20![Spirit Airlines logo]()
$166
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/116:00 am
PHL
- ORD
1 stop14h 11m
Spirit Airlines
Wed 3/118:16 pm
ORD
- PHL
1 stop11h 23m
Spirit Airlines
Deal found 2/20![Spirit Airlines logo]()
$162
This Expedia deal was found by Cheapflights users on 2/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/118:52 pm
PHL
- ORD
1 stop12h 33m
Multiple Airlines
Tue 3/176:36 pm
ORD
- PHL
1 stop27h 23m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 2/21. 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 3/118:52 pm
PHL
- ORD
1 stop12h 33m
Multiple Airlines
Wed 3/187:18 pm
ORD
- PHL
1 stop11h 49m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$168
This Mytrip deal was found by Cheapflights users on 2/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/118:52 pm
PHL
- ORD
1 stop12h 33m
Spirit Airlines
Mon 3/166:10 pm
ORD
- PHL
1 stop13h 29m
Spirit Airlines
Deal found 2/22![Spirit Airlines logo]()
$169
This Expedia deal was found by Cheapflights users on 2/23. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/1212:45 pm
PHL
- ORD
Nonstop2h 36m
Frontier
Tue 3/176:36 pm
ORD
- PHL
1 stop20h 33m
Frontier
Deal found 2/23![Frontier logo]()
$164
This CheapOair deal was found by Cheapflights users on 2/23. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/146:48 am
PHL
- ORD
1 stop14h 03m
Multiple Airlines
Tue 3/174:18 pm
ORD
- PHL
1 stop23h 58m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$172
This Mytrip deal was found by Cheapflights users on 2/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/166:08 pm
PHL
- ORD
1 stop18h 09m
Spirit Airlines
Wed 3/185:05 am
ORD
- PHL
1 stop17h 51m
Spirit Airlines
Deal found 2/23![Spirit Airlines logo]()
$171
This Expedia deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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.
Tue 3/2411:47 am
PHL
- MDW
1 stop10h 07m
Frontier
Tue 3/314:33 pm
MDW
- PHL
1 stop19h 09m
Frontier
Deal found 2/24![Frontier logo]()
$160
This Orbitz deal was found by Cheapflights users on 2/22. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2411:39 am
PHL
- ORD
1 stop27h 19m
Frontier
Tue 3/314:18 pm
ORD
- PHL
1 stop19h 24m
Frontier
Deal found 2/22![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 2/20. 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 3/2411:47 am
PHL
- ORD
1 stop8h 00m
Frontier
Thu 3/262:59 pm
ORD
- PHL
Nonstop2h 09m
Frontier
Deal found 2/20![Frontier logo]()
$163
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 February 24, 2026.
Search for one-way flight options from Philadelphia to Illinois. Find affordable one-way fares based on user searches. Data last updated February 24, 2026.
This Expedia deal was found by Cheapflights users on 2/23. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:34 pm
PHL
- ORD
Nonstop2h 34m
Frontier
Deal found 2/23![Frontier logo]()
$74
This Orbitz deal was found by Cheapflights users on 2/21. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/133:36 pm
PHL
- ORD
Nonstop2h 34m
Frontier
Deal found 2/21![Frontier logo]()
$75
This Kiwi.com deal was found by Cheapflights users on 2/20. 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 4/196:10 am
PHL
- ORD
1 stop14h 31m
Frontier
Deal found 2/20![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 2/20. 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.
Mon 4/205:32 pm
PHL
- ORD
1 stop28h 45m
Frontier
Deal found 2/20![Frontier logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/179:00 pm
PHL
- ORD
1 stop26h 53m
Frontier
Deal found 2/23![Frontier logo]()
$78
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:10 pm
PHL
- STL
1 stop12h 40m
Frontier
Deal found 2/23![Frontier logo]()
$78
This Super.com deal was found by Cheapflights users on 2/23. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/105:55 pm
PHL
- ORD
1 stop6h 43m
Frontier
Deal found 2/23![Frontier logo]()
$79
This Super.com deal was found by Cheapflights users on 2/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/34:55 pm
PHL
- MDW
1 stop6h 24m
Frontier
Deal found 2/20![Frontier logo]()
$79
This Priceline deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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.
Thu 4/163:41 pm
PHL
- MDW
1 stop7h 41m
Frontier
Deal found 2/24![Frontier logo]()
$80
This Priceline deal was found by Cheapflights users on 2/23. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/235:05 am
PHL
- STL
1 stop6h 25m
Frontier
Deal found 2/23![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 2/20. 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 8/185:45 am
PHL
- ORD
1 stop5h 36m
Spirit Airlines
Deal found 2/20![Spirit Airlines logo]()
$82
This Southwest deal was found by Cheapflights users on 2/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2211:35 am
PHL
- MDW
Nonstop2h 05m
Southwest
Deal found 2/23![Southwest logo]()
$82
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 February 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $140 (United Airlines) |
One-way from | $74 (Expedia) |
Popular in | February |
Cheapest in | January |
Average price | $331 |
Good round-trip deal | $329 or less |
Good one-way deal | $187 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 February 24, 2026.
Use the filters below to find and compare flights from Philadelphia to Illinois that are best for you.
Fly from
Philadelphia
Fly to
Illinois
Route
Depart
Return
Price
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Mon 5/18
6:10 am-7:39 am
Nonstop2h 29m
Chicago O'Hare Intl
Tue 5/19
9:44 pm-12:50 am
Nonstop2h 06m
$177
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Wed 4/22
4:55 pm-6:23 pm
Nonstop2h 28m
Chicago O'Hare Intl
Sat 4/25
8:45 am-2:11 pm
1 stop4h 26m
$185
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Sat 4/11
9:40 am-1:24 pm
1 stop4h 44m
Chicago O'Hare Intl
Sat 4/11
5:40 pm-11:00 pm
1 stop4h 20m
$195
PhiladelphiaChicago
PHL - RFD
PHLRFD
Philadelphia
Wed 4/8
6:08 pm-9:47 am
1 stop16h 39m
Chicago Greater Rockford
Mon 4/13
7:09 pm-2:46 pm
1 stop18h 37m
$223
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Fri 4/24
7:10 pm-10:45 pm
1 stop4h 35m
Chicago Midway
Sun 4/26
7:15 pm-10:10 pm
Nonstop1h 55m
$227
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Sat 4/4
6:05 am-9:10 am
1 stop4h 05m
Chicago O'Hare Intl
Sat 4/4
5:40 pm-11:00 pm
1 stop4h 20m
$237
PhiladelphiaMoline
PHL - MLI
PHLMLI
Philadelphia
Sat 4/18
10:31 am-4:28 pm
1 stop6h 57m
Moline Quad-City
Sat 4/25
5:11 pm-12:59 am
1 stop6h 48m
$251
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Thu 4/23
6:00 pm-7:10 pm
Nonstop2h 10m
Chicago Midway
Sun 4/26
7:15 pm-10:10 pm
Nonstop1h 55m
$257
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Mon 5/18
6:10 am-2:55 pm
1 stop9h 45m
Chicago Midway
Tue 5/19
2:50 pm-5:50 pm
Nonstop2h 00m
$264
PhiladelphiaMoline
PHL - MLI
PHLMLI
Philadelphia
Fri 3/13
6:25 pm-10:30 pm
1 stop5h 05m
Moline Quad-City
Wed 3/18
5:15 pm-12:57 am
1 stop6h 42m
$265
Showing 1-10 of 60 results
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-MDW
PHL-RFD
PHL-STL
PHL-ORD
PHL-PIA
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-MDW
PHL-RFD
PHL-STL
PHL-ORD
What is the cheapest month to book a flight from Philadelphia to Illinois?
Currently, December is the cheapest month in which you can book a flight from Philadelphia to Illinois (average of $48). Flying from Philadelphia to Illinois in July is currently the most expensive (average of $119). 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 February 24, 2026.
It’s optimal to fly from Philadelphia to Illinois in the evening. By choosing this option you can save up to 32% 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 February 21, 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 February 24, 2026.
The most flights from PHL to USIL are scheduled on a Tuesday (43 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).
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 February 24, 2026.
See what other customers who have flown with Southwest, Delta, and United Airlines from Philadelphia to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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.
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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 February 24, 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 February 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$74 | Average$172 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$98 | Average$353 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$155 | Average$368 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$158 | Average$311 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$163 | Average$406 | FlexibilityNo cancel fee | On-time71% |