$70+ 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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
May 10 — May 171
Round-trip
1 adult, Economy
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Find cheap flights from Philadelphia to Illinois with Cheapflights
1. Tell us where you want to go
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 April 10, 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 April 10, 2026.
This Frontier deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/33:20 pm
PHL
- ORD
1 stop9h 35m
Frontier
Thu 5/73:44 pm
ORD
- PHL
1 stop8h 00m
Frontier
Deal found 4/5![Frontier logo]()
$181
This Frontier deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 4/309:17 am
PHL
- MDW
1 stop11h 14m
Frontier
Sat 5/29:14 am
MDW
- PHL
1 stop11h 17m
Frontier
Deal found 4/5![Frontier logo]()
$181
This Expedia deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 4/133:36 pm
PHL
- ORD
Nonstop2h 34m
Frontier
Mon 4/202:20 pm
ORD
- PHL
Nonstop2h 14m
Frontier
Deal found 4/6![Frontier logo]()
$182
This Frontier deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 5/25:05 am
PHL
- ORD
1 stop11h 18m
Frontier
Mon 5/42:20 pm
ORD
- PHL
Nonstop2h 14m
Frontier
Deal found 4/6![Frontier logo]()
$183
This Frontier deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 6/1912:42 pm
PHL
- ORD
1 stop9h 11m
Frontier
Sat 6/207:52 pm
ORD
- PHL
Nonstop2h 28m
Frontier
Deal found 4/5![Frontier logo]()
$184
This Frontier deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 6/98:26 pm
PHL
- ORD
1 stop12h 37m
Frontier
Wed 6/176:55 am
ORD
- PHL
1 stop11h 08m
Frontier
Deal found 4/6![Frontier logo]()
$185
This Frontier deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/210:38 pm
PHL
- MDW
1 stop10h 03m
Frontier
Fri 6/126:00 am
MDW
- PHL
1 stop12h 17m
Frontier
Deal found 4/5![Frontier logo]()
$185
This Mytrip deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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.
Fri 4/243:23 pm
PHL
- ORD
2 stops19h 13m
Spirit Airlines
Wed 4/2911:28 am
ORD
- PHL
2 stops21h 21m
Spirit Airlines
Deal found 4/8![Spirit Airlines logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 4/268:51 am
PHL
- MDW
1 stop24h 13m
Frontier
Wed 4/296:10 am
MDW
- PHL
2 stops13h 30m
Frontier
Deal found 4/6![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/16:29 pm
PHL
- ORD
Nonstop2h 34m
Frontier
Sun 5/33:52 pm
ORD
- PHL
1 stop7h 51m
Frontier
Deal found 4/5![Frontier logo]()
$187
This Super.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 4/233:41 pm
PHL
- MDW
1 stop7h 41m
Frontier
Mon 4/279:14 am
MDW
- PHL
1 stop24h 24m
Frontier
Deal found 4/5![Frontier logo]()
$187
This Cheapflightsfares deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
Thu 4/306:12 pm
PHL
- ORD
1 stop7h 12m
Spirit Airlines
Sat 5/26:40 am
ORD
- PHL
1 stop9h 06m
Spirit Airlines
Deal found 4/7![Spirit Airlines logo]()
$188
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 April 10, 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 April 10, 2026.
This United Airlines deal was found by Cheapflights users on 4/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/269:21 am
PHL
- ORD
Nonstop2h 29m
United Airlines
Thu 5/286:35 am
ORD
- PHL
Nonstop2h 04m
United Airlines
Deal found 4/9![United Airlines logo]()
$247
This Southwest deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/262:00 pm
PHL
- MDW
Nonstop2h 10m
Southwest
Tue 6/22:50 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 4/5![Southwest logo]()
$247
This Kiwi.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/66:00 am
PHL
- RFD
1 stop28h 47m
Multiple Airlines
Sun 5/1010:37 am
RFD
- PHL
2 stops12h 51m
Multiple Airlines
Deal found 4/5![Multiple Airlines logo]()
$250
This Delta deal was found by Cheapflights users on 4/9. 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.
Wed 6/176:25 am
PHL
- MLI
1 stop4h 59m
Delta
Wed 6/245:17 pm
MLI
- PHL
1 stop6h 42m
Delta
Deal found 4/9![Delta logo]()
$261
This American Airlines deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 4/2412:45 pm
PHL
- CMI
1 stop6h 43m
American Airlines
Mon 4/272:38 pm
CMI
- PHL
1 stop6h 46m
American Airlines
Deal found 4/5![American Airlines logo]()
$323
This United Airlines deal was found by Cheapflights users on 4/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/710:00 am
PHL
- ORD
Nonstop2h 29m
United Airlines
Sat 5/911:05 am
ORD
- PHL
Nonstop2h 11m
United Airlines
Deal found 4/9![United Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 5/166:45 pm
PHL
- MDW
1 stop4h 50m
Southwest
Mon 5/184:35 pm
MDW
- PHL
1 stop6h 10m
Southwest
Deal found 4/6![Southwest logo]()
$257
This Southwest deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/66:20 am
PHL
- MDW
1 stop6h 15m
Southwest
Sun 5/1010:50 am
MDW
- PHL
1 stop6h 35m
Southwest
Deal found 4/5![Southwest logo]()
$257
This Kiwi.com deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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 5/249:12 pm
PHL
- RFD
1 stop11h 33m
Multiple Airlines
Wed 5/274:45 pm
RFD
- PHL
1 stop14h 56m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$293
This United Airlines deal was found by Cheapflights users on 4/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/257:45 pm
PHL
- ORD
1 stop4h 41m
United Airlines
Tue 7/286:30 am
ORD
- PHL
1 stop6h 40m
United Airlines
Deal found 4/9![United Airlines logo]()
$267
This Delta deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/16:29 pm
PHL
- MDW
1 stop4h 59m
Delta
Mon 5/49:27 am
MDW
- PHL
1 stop6h 10m
Delta
Deal found 4/5![Delta logo]()
$297
This Southwest deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/207:30 am
PHL
- MDW
Nonstop2h 05m
Southwest
Wed 5/276:10 pm
MDW
- PHL
Nonstop1h 55m
Southwest
Deal found 4/5![Southwest logo]()
$262
This Delta deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/106:12 am
PHL
- ORD
1 stop5h 17m
Delta
Sun 5/105:19 pm
ORD
- PHL
1 stop4h 48m
Delta
Deal found 4/5![Delta logo]()
$298
This American Airlines deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:40 pm
PHL
- BMI
1 stop5h 12m
American Airlines
Tue 5/266:02 pm
BMI
- PHL
1 stop5h 29m
American Airlines
Deal found 4/6![American Airlines logo]()
$329
This Southwest deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/87:10 pm
PHL
- MDW
1 stop4h 40m
Southwest
Sat 5/99:15 am
MDW
- PHL
2 stops11h 20m
Southwest
Deal found 4/5![Southwest logo]()
$262
This United Airlines deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/811:38 am
PHL
- ORD
Nonstop2h 29m
United Airlines
Sun 7/126:35 am
ORD
- PHL
Nonstop2h 04m
United Airlines
Deal found 4/5![United Airlines logo]()
$291
This Kiwi.com deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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 4/265:30 pm
PHL
- EVV
1 stop14h 33m
Multiple Airlines
Thu 4/304:13 pm
EVV
- PHL
2 stops26h 44m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$326
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/315:09 pm
PHL
- ORD
1 stop5h 59m
Delta
Tue 8/46:30 am
ORD
- PHL
1 stop7h 33m
Delta
Deal found 4/6![Delta logo]()
$309
This American Airlines deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 6/55:18 am
PHL
- CMI
1 stop6h 52m
American Airlines
Mon 6/156:44 pm
CMI
- PHL
1 stop4h 47m
American Airlines
Deal found 4/5![American Airlines logo]()
$363
This Southwest deal was found by Cheapflights users on 4/9. 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.
Fri 5/16:00 pm
PHL
- MDW
Nonstop2h 10m
Southwest
Wed 5/61:00 pm
MDW
- PHL
Nonstop1h 55m
Southwest
Deal found 4/9![Southwest logo]()
$277
This United Airlines deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/106:10 am
PHL
- ORD
Nonstop2h 29m
United Airlines
Sun 5/109:54 pm
ORD
- PHL
Nonstop2h 05m
United Airlines
Deal found 4/5![United Airlines logo]()
$317
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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 5/309:45 am
PHL
- ORD
1 stop4h 11m
Delta
Sun 5/315:30 am
ORD
- PHL
1 stop6h 48m
Delta
Deal found 4/7![Delta logo]()
$331
This American Airlines deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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 4/2310:40 am
PHL
- CMI
1 stop4h 28m
American Airlines
Sat 4/252:38 pm
CMI
- PHL
1 stop6h 46m
American Airlines
Deal found 4/8![American Airlines logo]()
$368
This Kiwi.com deal was found by Cheapflights users on 4/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/99:16 pm
PHL
- RFD
1 stop21h 20m
Multiple Airlines
Sun 8/1611:37 am
RFD
- PHL
1 stop12h 07m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$377
This Southwest deal was found by Cheapflights users on 4/9. 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 5/66:20 am
PHL
- MDW
2 stops10h 05m
Southwest
Tue 5/128:00 am
MDW
- PHL
2 stops7h 50m
Southwest
Deal found 4/9![Southwest logo]()
$287
This United Airlines deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/611:32 am
PHL
- ORD
Nonstop2h 29m
United Airlines
Thu 5/149:54 pm
ORD
- PHL
Nonstop2h 05m
United Airlines
Deal found 4/5![United Airlines logo]()
$317
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 7/276:25 am
PHL
- MLI
1 stop4h 57m
Delta
Sun 8/211:08 am
MLI
- PHL
1 stop5h 04m
Delta
Deal found 4/6![Delta logo]()
$334
This Southwest deal was found by Cheapflights users on 4/9. 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.
Tue 5/56:20 am
PHL
- STL
Nonstop2h 25m
Southwest
Sat 5/92:25 pm
STL
- PHL
1 stop6h 10m
Southwest
Deal found 4/9![Southwest logo]()
$287
This American Airlines deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 9/1910:30 am
PHL
- PIA
1 stop6h 08m
American Airlines
Sun 9/276:33 pm
PIA
- PHL
1 stop4h 26m
American Airlines
Deal found 4/5![American Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 9/96:00 am
PHL
- ORD
Nonstop2h 23m
United Airlines
Tue 9/1510:51 am
ORD
- PHL
Nonstop2h 17m
United Airlines
Deal found 4/5![United Airlines logo]()
$327
Last-minute flights from Philadelphia to IllinoisDiscover last-minute flight deals from Philadelphia to Illinois. Data last updated April 10, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Illinois. Data last updated April 10, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 4/133:36 pm
PHL
- ORD
Nonstop2h 34m
Frontier
Mon 4/202:20 pm
ORD
- PHL
Nonstop2h 14m
Frontier
Deal found 4/6![Frontier logo]()
$182
This Super.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 4/233:41 pm
PHL
- MDW
1 stop7h 41m
Frontier
Mon 4/279:14 am
MDW
- PHL
1 stop24h 24m
Frontier
Deal found 4/5![Frontier logo]()
$187
This Mytrip deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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.
Fri 4/243:23 pm
PHL
- ORD
2 stops19h 13m
Spirit Airlines
Wed 4/2911:28 am
ORD
- PHL
2 stops21h 21m
Spirit Airlines
Deal found 4/8![Spirit Airlines logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 4/268:51 am
PHL
- MDW
1 stop24h 13m
Frontier
Wed 4/296:10 am
MDW
- PHL
2 stops13h 30m
Frontier
Deal found 4/6![Frontier logo]()
$186
This Frontier deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 4/309:17 am
PHL
- MDW
1 stop11h 14m
Frontier
Sat 5/29:14 am
MDW
- PHL
1 stop11h 17m
Frontier
Deal found 4/5![Frontier logo]()
$181
This Cheapflightsfares deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
Thu 4/306:12 pm
PHL
- ORD
1 stop7h 12m
Spirit Airlines
Sat 5/26:40 am
ORD
- PHL
1 stop9h 06m
Spirit Airlines
Deal found 4/7![Spirit Airlines logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/16:29 pm
PHL
- ORD
Nonstop2h 34m
Frontier
Sun 5/33:52 pm
ORD
- PHL
1 stop7h 51m
Frontier
Deal found 4/5![Frontier logo]()
$187
This Frontier deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 5/25:05 am
PHL
- ORD
1 stop11h 18m
Frontier
Mon 5/42:20 pm
ORD
- PHL
Nonstop2h 14m
Frontier
Deal found 4/6![Frontier logo]()
$183
This Frontier deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/210:38 pm
PHL
- MDW
1 stop10h 03m
Frontier
Fri 6/126:00 am
MDW
- PHL
1 stop12h 17m
Frontier
Deal found 4/5![Frontier logo]()
$185
This Frontier deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/33:20 pm
PHL
- ORD
1 stop9h 35m
Frontier
Wed 5/69:00 am
ORD
- PHL
1 stop12h 10m
Frontier
Deal found 4/5![Frontier logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 4/9. 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.
Fri 5/87:00 am
PHL
- ORD
1 stop9h 43m
Frontier
Mon 5/114:05 pm
ORD
- PHL
1 stop30h 24m
Frontier
Deal found 4/9![Frontier logo]()
$184
This Frontier deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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 5/305:34 pm
PHL
- ORD
1 stop6h 39m
Frontier
Wed 6/106:55 am
ORD
- PHL
1 stop11h 08m
Frontier
Deal found 4/8![Frontier logo]()
$185
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 April 10, 2026.
Search for one-way flight options from Philadelphia to Illinois. Find affordable one-way fares based on user searches. Data last updated April 10, 2026.
This Priceline deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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.
Sun 5/106:10 pm
PHL
- STL
1 stop7h 11m
Frontier
Deal found 4/5![Frontier logo]()
$70
This Super.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/310:38 pm
PHL
- STL
1 stop25h 41m
Frontier
Deal found 4/5![Frontier logo]()
$75
This Frontier deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 4/306:43 am
PHL
- STL
1 stop15h 17m
Frontier
Deal found 4/6![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 5/37:00 am
PHL
- STL
1 stop24h 50m
Multiple Airlines
Deal found 4/6![Multiple Airlines logo]()
$80
This CheapOair deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 5/269:16 pm
PHL
- STL
1 stop27h 41m
Frontier
Deal found 4/6![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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 5/58:45 am
PHL
- ORD
1 stop15h 30m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$85
This Kiwi.com deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 4/267:30 am
PHL
- MDW
1 stop25h 34m
Multiple Airlines
Deal found 4/6![Multiple Airlines logo]()
$85
This Super.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/108:44 pm
PHL
- ORD
1 stop12h 38m
Spirit Airlines
Deal found 4/5![Spirit Airlines logo]()
$86
This Super.com deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 6/61:00 pm
PHL
- ORD
1 stop11h 15m
Spirit Airlines
Deal found 4/6![Spirit Airlines logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 5/17:10 pm
PHL
- MDW
1 stop24h 27m
Frontier
Deal found 4/6![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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 6/36:45 am
PHL
- RFD
1 stop28h 52m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$87
This Super.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 7/65:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Deal found 4/5![Frontier logo]()
$88
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 April 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $181 (Frontier) |
One-way from | $70 (Priceline) |
Popular in | March |
Cheapest in | January |
Average price | $288 |
Good round-trip deal | $293 or less |
Good one-way deal | $180 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 April 10, 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 5/26
9:21 am-10:50 am
Nonstop2h 29m
Chicago O'Hare Intl
Thu 5/28
6:35 am-9:39 am
Nonstop2h 04m
$247
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Tue 5/26
2:00 pm-3:10 pm
Nonstop2h 10m
Chicago Midway
Tue 6/2
2:50 pm-5:50 pm
Nonstop2h 00m
$247
PhiladelphiaChicago
PHL - RFD
PHLRFD
Philadelphia
Wed 5/6
6:00 am-9:47 am
1 stop28h 47m
Chicago Greater Rockford
Sun 5/10
10:37 am-12:28 am
2 stops12h 51m
$250
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Thu 5/7
10:00 am-11:29 am
Nonstop2h 29m
Chicago O'Hare Intl
Sat 5/9
11:05 am-2:16 pm
Nonstop2h 11m
$257
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Sat 5/16
6:45 pm-10:35 pm
1 stop4h 50m
Chicago Midway
Mon 5/18
4:35 pm-11:45 pm
1 stop6h 10m
$257
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Wed 5/6
6:20 am-11:35 am
1 stop6h 15m
Chicago Midway
Sun 5/10
10:50 am-6:25 pm
1 stop6h 35m
$257
PhiladelphiaMoline
PHL - MLI
PHLMLI
Philadelphia
Wed 6/17
6:25 am-10:24 am
1 stop4h 59m
Moline Quad-City
Wed 6/24
5:17 pm-12:59 am
1 stop6h 42m
$261
Quickest round-trip
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Wed 5/20
7:30 am-8:35 am
Nonstop2h 05m
Chicago Midway
Wed 5/27
6:10 pm-9:05 pm
Nonstop1h 55m
$262
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Fri 5/8
7:10 pm-10:50 pm
1 stop4h 40m
Chicago Midway
Sat 5/9
9:15 am-9:35 pm
2 stops11h 20m
$262
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Sat 7/25
7:45 pm-11:26 pm
1 stop4h 41m
Chicago O'Hare Intl
Tue 7/28
6:30 am-2:10 pm
1 stop6h 40m
$267
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Philadelphia to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Philadelphia with our price prediction graph.
PHL-STL
PHL-ORD
PHL-MDW
PHL-RFD
PHL-MLI
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Philadelphia to Illinois
PHL-USIL
PHL-STL
PHL-ORD
PHL-MDW
PHL-RFD
What is the cheapest month to book a flight from Philadelphia to Illinois?
Currently, 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 April 10, 2026.
It’s optimal to fly from Philadelphia to Illinois in the evening. By choosing this option you can save up to 31% 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 April 4, 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 April 10, 2026.
The most flights from PHL to USIL are scheduled on a Thursday (45 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (13 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 April 10, 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.
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from Philadelphia to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Philadelphia to Illinois
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Complete your trip
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Find flights from Philadelphia to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Philadelphia and Illinois flights
Browse other Philadelphia and Illinois flight options. Last updated on April 10, 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 April 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$77 | Average$179 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$98 | Average$347 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$156 | Average$371 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$158 | Average$306 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$161 | Average$418 | FlexibilityNo cancel fee | On-time71% |