$69+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Mar 19 — Mar 261
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 17, 2026.
Explore the most affordable flight options available from Philadelphia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 17, 2026.
This Frontier deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/246:34 pm
PHL
- ORD
Nonstop2h 34m
Frontier
Sun 4/264:28 pm
ORD
- PHL
1 stop7h 26m
Frontier
Deal found 2/17![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/16:34 pm
PHL
- ORD
Nonstop2h 34m
Frontier
Mon 5/42:20 pm
ORD
- PHL
Nonstop2h 14m
Frontier
Deal found 2/14![Frontier logo]()
$135
This Frontier deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/236:34 pm
PHL
- ORD
Nonstop2h 34m
Frontier
Mon 4/272:20 pm
ORD
- PHL
Nonstop2h 14m
Frontier
Deal found 2/15![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/124:24 pm
PHL
- ORD
Nonstop2h 45m
Frontier
Sat 8/158:04 pm
ORD
- PHL
Nonstop2h 33m
Frontier
Deal found 2/15![Frontier logo]()
$137
This Super.com deal was found by Cheapflights users on 2/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/92:00 pm
PHL
- ORD
1 stop9h 50m
Frontier
Sun 4/126:00 am
ORD
- PHL
Nonstop2h 14m
Frontier
Deal found 2/14![Frontier logo]()
$139
This United Airlines deal was found by Cheapflights users on 2/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/186:17 am
PHL
- ORD
Nonstop2h 28m
United Airlines
Tue 4/219:40 pm
ORD
- PHL
Nonstop2h 05m
United Airlines
Deal found 2/14![United Airlines logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/295:05 am
PHL
- ORD
1 stop6h 39m
Frontier
Thu 4/302:20 pm
ORD
- PHL
Nonstop2h 14m
Frontier
Deal found 2/15![Frontier logo]()
$141
This Frontier deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/205:05 am
PHL
- ORD
1 stop6h 39m
Frontier
Thu 4/232:20 pm
ORD
- PHL
Nonstop2h 14m
Frontier
Deal found 2/14![Frontier logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/92:00 pm
PHL
- ORD
1 stop9h 50m
Frontier
Mon 4/136:47 pm
ORD
- PHL
Nonstop2h 14m
Frontier
Deal found 2/16![Frontier logo]()
$143
This Expedia deal was found by Cheapflights users on 2/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/15:24 pm
PHL
- ORD
Nonstop2h 40m
Frontier
Tue 8/47:04 pm
ORD
- PHL
Nonstop2h 30m
Frontier
Deal found 2/13![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:59 pm
PHL
- ORD
1 stop7h 15m
Multiple Airlines
Sat 5/161:27 pm
ORD
- PHL
1 stop8h 43m
Multiple Airlines
Deal found 2/14![Multiple Airlines logo]()
$145
This Southwest deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/23:45 pm
PHL
- MDW
Nonstop2h 15m
Southwest
Sat 5/97:40 am
MDW
- PHL
Nonstop1h 55m
Southwest
Deal found 2/15![Southwest logo]()
$147
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 17, 2026.
Discover carefully curated flight deals from Philadelphia to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 17, 2026.
This United Airlines deal was found by Cheapflights users on 2/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/186:17 am
PHL
- ORD
Nonstop2h 28m
United Airlines
Tue 4/219:40 pm
ORD
- PHL
Nonstop2h 05m
United Airlines
Deal found 2/14![United Airlines logo]()
$140
This Southwest deal was found by Cheapflights users on 2/14. 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.
Sat 5/23:45 pm
PHL
- MDW
Nonstop2h 15m
Southwest
Tue 5/57:55 am
MDW
- PHL
Nonstop1h 55m
Southwest
Deal found 2/14![Southwest logo]()
$162
This CheapOair deal was found by Cheapflights users on 2/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/234:42 pm
PHL
- STL
1 stop7h 37m
Frontier
Sun 4/264:55 pm
STL
- PHL
1 stop13h 46m
Frontier
Deal found 2/13![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/215:59 pm
PHL
- ORD
1 stop7h 15m
Multiple Airlines
Sun 4/262:20 pm
ORD
- PHL
Nonstop2h 14m
Multiple Airlines
Deal found 2/13![Multiple Airlines logo]()
$175
This Delta deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/173:42 pm
PHL
- MDW
1 stop7h 46m
Delta
Sun 4/199:27 am
MDW
- PHL
1 stop6h 10m
Delta
Deal found 2/16![Delta logo]()
$197
This American Airlines deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/111:46 pm
PHL
- PIA
1 stop5h 07m
American Airlines
Mon 3/166:50 pm
PIA
- PHL
1 stop4h 04m
American Airlines
Deal found 2/16![American Airlines logo]()
$269
This United Airlines deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/96:34 pm
PHL
- ORD
Nonstop2h 28m
United Airlines
Mon 5/119:39 pm
ORD
- PHL
Nonstop2h 06m
United Airlines
Deal found 2/15![United Airlines logo]()
$140
This Southwest deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2911:35 am
PHL
- MDW
Nonstop2h 05m
Southwest
Sat 5/27:40 am
MDW
- PHL
Nonstop1h 55m
Southwest
Deal found 2/15![Southwest logo]()
$162
This United Airlines deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/176:47 pm
PHL
- ORD
Nonstop2h 29m
United Airlines
Sun 4/199:40 pm
ORD
- PHL
Nonstop2h 05m
United Airlines
Deal found 2/16![United Airlines logo]()
$177
This Southwest deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/82:15 pm
PHL
- MDW
Nonstop2h 10m
Southwest
Sun 5/107:45 am
MDW
- PHL
Nonstop1h 55m
Southwest
Deal found 2/15![Southwest logo]()
$177
This Delta deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/16:05 am
PHL
- ORD
1 stop4h 05m
Delta
Sat 4/45:40 pm
ORD
- PHL
1 stop4h 20m
Delta
Deal found 2/15![Delta logo]()
$207
This United Airlines deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/146:10 am
PHL
- ORD
Nonstop2h 29m
United Airlines
Sat 5/167:15 am
ORD
- PHL
Nonstop2h 14m
United Airlines
Deal found 2/16![United Airlines logo]()
$177
This Delta deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/2112:26 pm
PHL
- ORD
1 stop4h 52m
Delta
Wed 3/259:50 am
ORD
- PHL
1 stop5h 43m
Delta
Deal found 2/15![Delta logo]()
$207
This United Airlines deal was found by Cheapflights users on 2/13. 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.
Wed 4/2211:36 am
PHL
- ORD
Nonstop2h 28m
United Airlines
Sat 4/252:20 pm
ORD
- PHL
Nonstop2h 12m
United Airlines
Deal found 2/13![United Airlines logo]()
$177
This Delta deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/215:40 am
PHL
- MDW
1 stop5h 16m
Delta
Wed 3/259:35 am
MDW
- PHL
1 stop5h 58m
Delta
Deal found 2/15![Delta logo]()
$207
This United Airlines deal was found by Cheapflights users on 2/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:20 pm
PHL
- ORD
Nonstop2h 29m
United Airlines
Wed 5/66:26 pm
ORD
- PHL
Nonstop2h 18m
United Airlines
Deal found 2/14![United Airlines logo]()
$177
This Southwest deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/93:45 pm
PHL
- MDW
Nonstop2h 15m
Southwest
Mon 5/116:45 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 2/16![Southwest logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:05 am
PHL
- STL
2 stops15h 07m
Frontier
Sun 4/2611:21 am
STL
- PHL
1 stop12h 33m
Frontier
Deal found 2/14![Frontier logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/85:21 pm
PHL
- STL
1 stop7h 04m
Multiple Airlines
Thu 4/911:21 am
STL
- PHL
2 stops13h 01m
Multiple Airlines
Deal found 2/16![Multiple Airlines logo]()
$268
This American Airlines deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/110:41 am
PHL
- BMI
1 stop4h 45m
American Airlines
Sat 4/45:00 am
BMI
- PHL
1 stop3h 40m
American Airlines
Deal found 2/16![American Airlines logo]()
$269
This Southwest deal was found by Cheapflights users on 2/13. 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.
Sat 4/183:45 pm
PHL
- MDW
Nonstop2h 15m
Southwest
Wed 4/222:50 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 2/13![Southwest logo]()
$217
This Delta deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/119:40 am
PHL
- MDW
1 stop3h 49m
Delta
Mon 4/201:24 pm
MDW
- PHL
1 stop4h 54m
Delta
Deal found 2/17![Delta logo]()
$217
This Orbitz deal was found by Cheapflights users on 2/13. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/3010:12 pm
PHL
- STL
1 stop26h 07m
Frontier
Wed 4/18:16 pm
STL
- PHL
1 stop8h 15m
Frontier
Deal found 2/13![Frontier logo]()
$270
This Kiwi.com deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/235:59 pm
PHL
- RFD
1 stop17h 38m
Multiple Airlines
Thu 5/2811:27 am
RFD
- PHL
1 stop8h 29m
Multiple Airlines
Deal found 2/15![Multiple Airlines logo]()
$285
This Southwest deal was found by Cheapflights users on 2/13. 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.
Sat 4/183:45 pm
PHL
- MDW
Nonstop2h 15m
Southwest
Mon 4/203:25 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 2/13![Southwest logo]()
$217
This Delta deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/116:05 am
PHL
- MDW
1 stop3h 48m
Delta
Thu 4/239:27 am
MDW
- PHL
1 stop6h 10m
Delta
Deal found 2/17![Delta logo]()
$217
This United Airlines deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/96:10 am
PHL
- ORD
Nonstop2h 29m
United Airlines
Tue 5/129:00 am
ORD
- PHL
Nonstop2h 14m
United Airlines
Deal found 2/15![United Airlines logo]()
$210
This American Airlines deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2710:30 am
PHL
- BMI
1 stop4h 56m
American Airlines
Sun 3/15:00 am
BMI
- PHL
1 stop3h 38m
American Airlines
Deal found 2/15![American Airlines logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/146:08 pm
PHL
- RFD
1 stop16h 39m
Multiple Airlines
Thu 3/1910:37 am
RFD
- PHL
1 stop11h 22m
Multiple Airlines
Deal found 2/15![Multiple Airlines logo]()
$286
This Southwest deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/176:00 pm
PHL
- MDW
Nonstop2h 10m
Southwest
Sun 4/197:45 am
MDW
- PHL
Nonstop1h 55m
Southwest
Deal found 2/16![Southwest logo]()
$217
Last-minute flights from Philadelphia to IllinoisDiscover last-minute flight deals from Philadelphia to Illinois. Data last updated February 17, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Illinois. Data last updated February 17, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 2/13. 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 2/257:59 pm
PHL
- ORD
1 stop16h 23m
Multiple Airlines
Mon 3/211:33 am
ORD
- PHL
1 stop22h 38m
Multiple Airlines
Deal found 2/13![Multiple Airlines logo]()
$157
This Frontier deal was found by Cheapflights users on 2/13. 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 2/2811:52 am
PHL
- ORD
1 stop12h 25m
Frontier
Mon 3/212:01 pm
ORD
- PHL
1 stop9h 51m
Frontier
Deal found 2/13![Frontier logo]()
$160
This Expedia deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/25:30 am
PHL
- ORD
1 stop6h 21m
Multiple Airlines
Fri 3/68:16 pm
ORD
- PHL
1 stop11h 28m
Multiple Airlines
Deal found 2/15![Multiple Airlines logo]()
$162
This Cheapflightsfares deal was found by Cheapflights users on 2/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/38:06 am
PHL
- ORD
1 stop14h 07m
Spirit Airlines
Thu 3/57:00 am
ORD
- PHL
1 stop11h 52m
Spirit Airlines
Deal found 2/13![Spirit Airlines logo]()
$134
This Expedia deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/32:09 pm
PHL
- STL
1 stop9h 18m
Frontier
Tue 3/104:51 pm
STL
- PHL
1 stop28h 24m
Frontier
Deal found 2/16![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/411:40 am
PHL
- ORD
1 stop6h 12m
Multiple Airlines
Mon 3/98:16 pm
ORD
- PHL
1 stop11h 28m
Multiple Airlines
Deal found 2/16![Multiple Airlines logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/411:40 am
PHL
- ORD
1 stop6h 12m
Multiple Airlines
Tue 3/108:16 pm
ORD
- PHL
1 stop11h 28m
Multiple Airlines
Deal found 2/17![Multiple Airlines logo]()
$161
This CheapOair deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/108:06 am
PHL
- ORD
1 stop14h 07m
Spirit Airlines
Wed 3/117:00 am
ORD
- PHL
1 stop11h 52m
Spirit Airlines
Deal found 2/15![Spirit Airlines logo]()
$149
This Cheapflightsfares deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/108:06 am
PHL
- ORD
1 stop14h 07m
Spirit Airlines
Tue 3/176:10 pm
ORD
- PHL
1 stop13h 29m
Spirit Airlines
Deal found 2/17![Spirit Airlines logo]()
$155
This Cheapflightsfares deal was found by Cheapflights users on 2/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/108:06 am
PHL
- ORD
1 stop14h 07m
Spirit Airlines
Mon 3/166:10 pm
ORD
- PHL
1 stop13h 29m
Spirit Airlines
Deal found 2/14![Spirit Airlines logo]()
$156
This Priceline deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1011:52 am
PHL
- MDW
1 stop10h 02m
Frontier
Wed 3/1111:19 am
MDW
- PHL
1 stop9h 56m
Frontier
Deal found 2/17![Frontier logo]()
$160
This United Airlines deal was found by Cheapflights users on 2/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/149:55 am
PHL
- ORD
Nonstop2h 33m
United Airlines
Sat 3/219:15 pm
ORD
- PHL
Nonstop2h 01m
United Airlines
Deal found 2/14![United Airlines logo]()
$150
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 17, 2026.
Search for one-way flight options from Philadelphia to Illinois. Find affordable one-way fares based on user searches. Data last updated February 17, 2026.
This Frontier deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:24 pm
PHL
- ORD
Nonstop2h 40m
Frontier
Deal found 2/17![Frontier logo]()
$69
This Cheapflightsfares deal was found by Cheapflights users on 2/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/178:18 am
PHL
- ORD
1 stop12h 33m
Spirit Airlines
Deal found 2/14![Spirit Airlines logo]()
$72
This Super.com deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/196:34 pm
PHL
- ORD
Nonstop2h 34m
Frontier
Deal found 2/15![Frontier logo]()
$73
This Super.com deal was found by Cheapflights users on 2/13. 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.
Mon 4/134:08 pm
PHL
- ORD
Nonstop2h 34m
Frontier
Deal found 2/13![Frontier logo]()
$74
This Southwest deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/253:45 pm
PHL
- MDW
Nonstop2h 15m
Southwest
Deal found 2/15![Southwest logo]()
$74
This Cheapflightsfares deal was found by Cheapflights users on 2/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/148:18 am
PHL
- ORD
1 stop9h 57m
Spirit Airlines
Deal found 2/13![Spirit Airlines logo]()
$75
This Super.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/186:48 am
PHL
- ORD
1 stop14h 03m
Spirit Airlines
Deal found 2/17![Spirit Airlines logo]()
$76
This Cheapflightsfares deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/248:18 am
PHL
- ORD
1 stop9h 57m
Spirit Airlines
Deal found 2/15![Spirit Airlines logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:12 pm
PHL
- MDW
1 stop24h 36m
Frontier
Deal found 2/14![Frontier logo]()
$78
This Super.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1312:50 pm
PHL
- MDW
1 stop8h 19m
Frontier
Deal found 2/17![Frontier logo]()
$79
This Super.com deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/26:18 pm
PHL
- STL
1 stop6h 41m
Frontier
Deal found 2/16![Frontier logo]()
$79
This Frontier deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/411:40 am
PHL
- ORD
1 stop6h 12m
Frontier
Deal found 2/17![Frontier logo]()
$80
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 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $134 (Frontier) |
One-way from | $69 (Frontier) |
Popular in | February |
Cheapest in | January |
Average price | $328 |
Good round-trip deal | $334 or less |
Good one-way deal | $173 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 17, 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
Sat 4/18
6:17 am-7:45 am
Nonstop2h 28m
Chicago O'Hare Intl
Tue 4/21
9:40 pm-12:45 am
Nonstop2h 05m
$140
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Sat 5/9
6:34 pm-8:02 pm
Nonstop2h 28m
Chicago O'Hare Intl
Mon 5/11
9:39 pm-12:45 am
Nonstop2h 06m
$140
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Sat 5/2
3:45 pm-5:00 pm
Nonstop2h 15m
Chicago Midway
Tue 5/5
7:55 am-10:50 am
Nonstop1h 55m
$162
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Wed 4/29
11:35 am-12:40 pm
Nonstop2h 05m
Chicago Midway
Sat 5/2
7:40 am-10:35 am
Nonstop1h 55m
$162
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Thu 4/23
4:42 pm-11:19 pm
1 stop7h 37m
Lambert-St Louis
Sun 4/26
4:55 pm-7:41 am
1 stop13h 46m
$171
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Tue 4/21
5:59 pm-12:14 am
1 stop7h 15m
Chicago O'Hare Intl
Sun 4/26
2:20 pm-5:34 pm
Nonstop2h 14m
$175
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Fri 4/17
6:47 pm-8:16 pm
Nonstop2h 29m
Chicago O'Hare Intl
Sun 4/19
9:40 pm-12:45 am
Nonstop2h 05m
$177
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Fri 5/8
2:15 pm-3:25 pm
Nonstop2h 10m
Chicago Midway
Sun 5/10
7:45 am-10:40 am
Nonstop1h 55m
$177
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Thu 5/14
6:10 am-7:39 am
Nonstop2h 29m
Chicago O'Hare Intl
Sat 5/16
7:15 am-10:29 am
Nonstop2h 14m
$177
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Wed 4/22
11:36 am-1:04 pm
Nonstop2h 28m
Chicago O'Hare Intl
Sat 4/25
2:20 pm-5:32 pm
Nonstop2h 12m
$177
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-ORD
PHL-MDW
PHL-STL
PHL-PIA
PHL-BMI
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Philadelphia to Illinois
PHL-USIL
PHL-ORD
PHL-MDW
PHL-STL
PHL-PIA
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 17, 2026.
It’s optimal to fly from Philadelphia to Illinois in the evening. By choosing this option you can save up to 33% 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 7, 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 17, 2026.
The most flights from PHL to USIL are scheduled on a Monday (48 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 17, 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.
Comfort
8.0
Overall
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Overall
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Overall
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Overall
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Overall
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Overall
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Boarding
8.1
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.
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 February 17, 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 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$74 | Average$173 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$98 | Average$347 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$155 | Average$379 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$158 | Average$319 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$163 | Average$401 | FlexibilityNo cancel fee | On-time71% |