$94+ 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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Jun 27 — Jul 41
Round-trip
1 adult, Economy
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Cheapest flights from Philadelphia to IllinoisExplore the most affordable flight options available from Philadelphia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 28, 2026.
Explore the most affordable flight options available from Philadelphia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 28, 2026.
This Super.com deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Thu 7/98:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Deal found 5/26![Frontier logo]()
$196
This Super.com deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/116:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Mon 7/138:58 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Deal found 5/27![Frontier logo]()
$197
This Frontier deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/275:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Thu 7/28:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/28![Frontier logo]()
$198
This Frontier deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/295:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Sat 5/307:52 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/28![Frontier logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/205:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Mon 6/228:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/26![Frontier logo]()
$206
This Super.com deal was found by Cheapflights users on 5/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/285:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Sat 5/307:52 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/24![Frontier logo]()
$208
This Frontier deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” 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 5/285:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Fri 5/297:52 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/26![Frontier logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” 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 9/25:10 pm
PHL
- ORD
1 stop7h 04m
Frontier
Sat 9/57:52 pm
ORD
- PHL
Nonstop2h 28m
Frontier
Deal found 5/26![Frontier logo]()
$215
This Super.com deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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 6/275:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Fri 7/38:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/25![Frontier logo]()
$216
This Expedia deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” 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 6/278:30 am
PHL
- ORD
1 stop12h 20m
Frontier
Sat 7/118:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Deal found 5/27![Frontier logo]()
$218
This Frontier deal was found by Cheapflights users on 5/24. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/275:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Sat 7/46:55 am
ORD
- PHL
1 stop11h 22m
Frontier
Deal found 5/24![Frontier logo]()
$219
This Super.com deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” 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 8/275:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Sat 8/297:52 pm
ORD
- PHL
Nonstop2h 28m
Frontier
Deal found 5/28![Frontier logo]()
$220
Best flights from Philadelphia to IllinoisDiscover carefully curated flight deals from Philadelphia to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 28, 2026.
Discover carefully curated flight deals from Philadelphia to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 28, 2026.
This Frontier deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” 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 7/96:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Mon 7/138:58 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Deal found 5/28![Frontier logo]()
$246
This Kiwi.com deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” 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 10/141:52 pm
PHL
- RFD
1 stop19h 58m
Multiple Airlines
Sun 10/1810:30 am
RFD
- PHL
1 stop12h 13m
Multiple Airlines
Deal found 5/28![Multiple Airlines logo]()
$277
This Southwest deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/112:45 pm
PHL
- MDW
2 stops8h 35m
Southwest
Tue 8/1812:35 pm
MDW
- PHL
2 stops8h 15m
Southwest
Deal found 5/27![Southwest logo]()
$278
This United Airlines deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:00 am
PHL
- PAH
1 stop7h 52m
United Airlines
Sat 8/155:00 am
PAH
- PHL
1 stop6h 23m
United Airlines
Deal found 5/28![United Airlines logo]()
$294
This American Airlines deal was found by Cheapflights users on 5/24. 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.
Sat 7/255:06 am
PHL
- MLI
1 stop6h 52m
American Airlines
Sat 8/84:21 pm
MLI
- PHL
1 stop6h 45m
American Airlines
Deal found 5/24![American Airlines logo]()
$304
This Delta deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/228:05 am
PHL
- EVV
1 stop5h 57m
Delta
Sat 7/253:07 pm
EVV
- PHL
1 stop5h 13m
Delta
Deal found 5/25![Delta logo]()
$331
This Southwest deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/111:45 pm
PHL
- STL
1 stop5h 10m
Southwest
Tue 8/186:40 pm
STL
- PHL
Nonstop2h 10m
Southwest
Deal found 5/27![Southwest logo]()
$287
This Kiwi.com deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/224:30 pm
PHL
- RFD
2 stops19h 07m
Multiple Airlines
Sun 7/2611:27 am
RFD
- PHL
1 stop12h 12m
Multiple Airlines
Deal found 5/25![Multiple Airlines logo]()
$303
This Southwest deal was found by Cheapflights users on 5/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/812:10 pm
PHL
- MDW
Nonstop2h 00m
Southwest
Tue 8/116:00 am
MDW
- PHL
1 stop6h 10m
Southwest
Deal found 5/24![Southwest logo]()
$289
This United Airlines deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/207:00 pm
PHL
- ORD
Nonstop2h 33m
United Airlines
Wed 6/249:06 am
ORD
- PHL
Nonstop2h 19m
United Airlines
Deal found 5/25![United Airlines logo]()
$318
This American Airlines deal was found by Cheapflights users on 5/24. 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.
Wed 6/174:56 pm
PHL
- PIA
1 stop8h 02m
American Airlines
Thu 6/255:06 am
PIA
- PHL
1 stop5h 15m
American Airlines
Deal found 5/24![American Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/95:15 am
PHL
- MLI
1 stop6h 01m
Delta
Sat 6/135:17 pm
MLI
- PHL
1 stop6h 43m
Delta
Deal found 5/25![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” 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 7/108:05 am
PHL
- PIA
1 stop5h 33m
United Airlines
Mon 7/135:43 pm
PIA
- PHL
1 stop6h 14m
United Airlines
Deal found 5/26![United Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/147:25 am
PHL
- MDW
Nonstop2h 05m
Southwest
Mon 7/203:20 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 5/26![Southwest logo]()
$295
This American Airlines deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2210:35 am
PHL
- EVV
1 stop6h 35m
American Airlines
Sat 7/254:35 pm
EVV
- PHL
1 stop6h 47m
American Airlines
Deal found 5/25![American Airlines logo]()
$331
This Delta deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/86:25 am
PHL
- BMI
1 stop6h 01m
Delta
Sun 6/146:00 am
BMI
- PHL
1 stop6h 26m
Delta
Deal found 5/25![Delta logo]()
$339
This Southwest deal was found by Cheapflights users on 5/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/224:35 pm
PHL
- MDW
Nonstop2h 25m
Southwest
Sun 7/267:45 am
MDW
- PHL
Nonstop2h 05m
Southwest
Deal found 5/24![Southwest logo]()
$301
This Kiwi.com deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” 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 8/122:59 pm
PHL
- RFD
1 stop20h 48m
Multiple Airlines
Sun 8/1611:37 am
RFD
- PHL
2 stops11h 09m
Multiple Airlines
Deal found 5/26![Multiple Airlines logo]()
$372
This United Airlines deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” 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 6/106:00 am
PHL
- MLI
1 stop7h 36m
United Airlines
Sun 6/146:30 pm
MLI
- PHL
1 stop5h 29m
United Airlines
Deal found 5/26![United Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” 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 8/291:49 pm
PHL
- ORD
1 stop8h 01m
Delta
Mon 8/316:25 pm
ORD
- PHL
1 stop5h 54m
Delta
Deal found 5/28![Delta logo]()
$363
This Southwest deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” 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 8/216:05 pm
PHL
- MDW
Nonstop2h 05m
Southwest
Mon 8/2411:00 am
MDW
- PHL
1 stop5h 25m
Southwest
Deal found 5/28![Southwest logo]()
$304
This United Airlines deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” 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 7/46:00 am
PHL
- MLI
1 stop7h 36m
United Airlines
Wed 7/86:30 pm
MLI
- PHL
1 stop5h 27m
United Airlines
Deal found 5/27![United Airlines logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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 8/136:33 pm
PHL
- RFD
1 stop14h 16m
Multiple Airlines
Sun 8/1611:37 am
RFD
- PHL
1 stop12h 02m
Multiple Airlines
Deal found 5/25![Multiple Airlines logo]()
$385
This Southwest deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” 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 7/36:00 pm
PHL
- MDW
1 stop6h 00m
Southwest
Thu 7/99:00 am
MDW
- PHL
Nonstop1h 55m
Southwest
Deal found 5/26![Southwest logo]()
$305
This Delta deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” 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 7/912:36 pm
PHL
- ORD
1 stop4h 47m
Delta
Mon 7/132:07 pm
ORD
- PHL
1 stop4h 18m
Delta
Deal found 5/28![Delta logo]()
$373
This United Airlines deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” 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 7/256:00 am
PHL
- MLI
1 stop5h 04m
United Airlines
Sat 8/86:30 pm
MLI
- PHL
1 stop5h 27m
United Airlines
Deal found 5/26![United Airlines logo]()
$341
This Southwest deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/57:15 am
PHL
- STL
2 stops8h 55m
Southwest
Wed 8/125:55 am
STL
- PHL
2 stops9h 05m
Southwest
Deal found 5/27![Southwest logo]()
$307
This Delta deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/225:15 am
PHL
- EVV
1 stop5h 11m
Delta
Sun 7/265:59 pm
EVV
- PHL
1 stop6h 00m
Delta
Deal found 5/23![Delta logo]()
$379
This KAYAK deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/810:35 am
PHL
- ORD
1 stop5h 09m
American Airlines
Wed 6/107:30 am
ORD
- PHL
1 stop6h 09m
American Airlines
Deal found 5/25![American Airlines logo]()
$461
This United Airlines deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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 8/216:25 am
PHL
- PIA
1 stop4h 41m
United Airlines
Sun 8/236:05 am
PIA
- PHL
1 stop5h 18m
United Airlines
Deal found 5/25![United Airlines logo]()
$351
Last-minute flights from Philadelphia to IllinoisDiscover last-minute flight deals from Philadelphia to Illinois. Data last updated May 28, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Illinois. Data last updated May 28, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 5/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/285:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Sat 5/307:52 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/24![Frontier logo]()
$208
This Frontier deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” 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 5/285:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Fri 5/297:52 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/26![Frontier logo]()
$209
This Frontier deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/295:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Sat 5/307:52 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/23![Frontier logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/135:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Sat 6/208:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/26![Frontier logo]()
$215
This Kiwi.com deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/205:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Mon 6/228:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/26![Frontier logo]()
$206
This Frontier deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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 6/246:30 am
PHL
- MDW
1 stop5h 39m
Frontier
Sat 7/411:59 am
MDW
- PHL
1 stop9h 30m
Frontier
Deal found 5/25![Frontier logo]()
$240
This Super.com deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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 6/275:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Mon 6/298:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/25![Frontier logo]()
$196
This Frontier deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/275:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Thu 7/28:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/28![Frontier logo]()
$198
This Super.com deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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 6/275:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Fri 7/38:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/25![Frontier logo]()
$216
This Super.com deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” 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 6/275:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Sat 7/41:29 pm
ORD
- PHL
1 stop8h 00m
Frontier
Deal found 5/28![Frontier logo]()
$218
This Frontier deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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 6/308:30 am
PHL
- STL
1 stop10h 00m
Frontier
Wed 7/87:03 pm
STL
- PHL
1 stop9h 57m
Frontier
Deal found 5/25![Frontier logo]()
$230
This Super.com deal was found by Cheapflights users on 5/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/3011:35 am
PHL
- STL
1 stop7h 43m
Frontier
Wed 7/14:17 pm
STL
- PHL
1 stop15h 34m
Frontier
Deal found 5/24![Frontier logo]()
$237
One-way flights from Philadelphia to IllinoisSearch for one-way flight options from Philadelphia to Illinois. Find affordable one-way fares based on user searches. Data last updated May 28, 2026.
Search for one-way flight options from Philadelphia to Illinois. Find affordable one-way fares based on user searches. Data last updated May 28, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” 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 11/911:05 am
PHL
- ORD
Nonstop2h 36m
Frontier
Deal found 5/27![Frontier logo]()
$94
This Southwest deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/122:45 pm
PHL
- MDW
2 stops6h 25m
Southwest
Deal found 5/28![Southwest logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” 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 7/186:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 5/27![Frontier logo]()
$99
This Super.com deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” 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 7/276:11 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 5/27![Frontier logo]()
$108
This Frontier deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” 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 7/206:11 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 5/28![Frontier logo]()
$109
This Super.com deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2212:44 pm
PHL
- STL
1 stop7h 39m
Frontier
Deal found 5/25![Frontier logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/192:59 pm
PHL
- ORD
1 stop22h 16m
Frontier
Deal found 5/23![Frontier logo]()
$115
This Frontier deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” 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 8/256:04 pm
PHL
- STL
1 stop7h 10m
Frontier
Deal found 5/28![Frontier logo]()
$115
This Super.com deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/256:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 5/27![Frontier logo]()
$119
This Super.com deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/144:30 pm
PHL
- MDW
1 stop6h 33m
Frontier
Deal found 5/26![Frontier logo]()
$119
This Frontier deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/274:40 pm
PHL
- MDW
1 stop6h 31m
Frontier
Deal found 5/26![Frontier logo]()
$120
This Super.com deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/241:28 pm
PHL
- STL
1 stop11h 21m
Frontier
Deal found 5/28![Frontier logo]()
$120
Find flight deals from Philadelphia to Illinois
Keep the following information in mind while searching for Philadelphia to Illinois flight deals. Data was last updated May 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $196 (Super.com) |
One-way from | $94 (Kiwi.com) |
Popular in | March |
Cheapest in | January |
Average price | $319 |
Good round-trip deal | $303 or less |
Good one-way deal | $150 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Philadelphia to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 28, 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
Thu 7/9
6:05 pm-7:47 pm
Nonstop2h 42m
Chicago O'Hare Intl
Mon 7/13
8:58 pm-12:21 am
Nonstop2h 23m
$246
PhiladelphiaChicago
PHL - RFD
PHLRFD
Philadelphia
Wed 10/14
1:52 pm-8:50 am
1 stop19h 58m
Chicago Greater Rockford
Sun 10/18
10:30 am-11:43 pm
1 stop12h 13m
$277
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Tue 8/11
2:45 pm-10:20 pm
2 stops8h 35m
Chicago Midway
Tue 8/18
12:35 pm-9:50 pm
2 stops8h 15m
$278
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Tue 8/11
1:45 pm-5:55 pm
1 stop5h 10m
Lambert-St Louis
Tue 8/18
6:40 pm-9:50 pm
Nonstop2h 10m
$287
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Sat 8/8
12:10 pm-1:10 pm
Nonstop2h 00m
Chicago Midway
Tue 8/11
6:00 am-1:10 pm
1 stop6h 10m
$289
PhiladelphiaPaducah
PHL - PAH
PHLPAH
Philadelphia
Sat 8/8
6:00 am-12:52 pm
1 stop7h 52m
Paducah Barkley Regional
Sat 8/15
5:00 am-12:23 pm
1 stop6h 23m
$294
Quickest round-trip
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Tue 7/14
7:25 am-8:30 am
Nonstop2h 05m
Chicago Midway
Mon 7/20
3:20 pm-6:20 pm
Nonstop2h 00m
$295
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Wed 7/22
4:35 pm-6:00 pm
Nonstop2h 25m
Chicago Midway
Sun 7/26
7:45 am-10:50 am
Nonstop2h 05m
$301
PhiladelphiaChicago
PHL - RFD
PHLRFD
Philadelphia
Wed 7/22
4:30 pm-10:37 am
2 stops19h 07m
Chicago Greater Rockford
Sun 7/26
11:27 am-12:39 am
1 stop12h 12m
$303
PhiladelphiaMoline
PHL - MLI
PHLMLI
Philadelphia
Sat 7/25
5:06 am-10:58 am
1 stop6h 52m
Moline Quad-City
Sat 8/8
4:21 pm-12:06 am
1 stop6h 45m
$304
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Philadelphia to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Philadelphia with our price prediction graph.
PHL-ORD
PHL-STL
PHL-MDW
PHL-RFD
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-STL
PHL-MDW
PHL-RFD
What is the cheapest month to book a flight from Philadelphia to Illinois?
Currently, February is the cheapest month in which you can book a flight from Philadelphia to Illinois (average of $40). Flying from Philadelphia to Illinois in December is currently the most expensive (average of $807). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from PHL to IL?
Find hourly flight availability from Philadelphia to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 28, 2026.
It’s optimal to fly from Philadelphia to Illinois in the evening. By choosing this option you can save up to 28% on the cost of your flight, compared to a flight at noon.
Weekly flight availability from Philadelphia to Illinois
Explore weekly flight availability from Philadelphia to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 28, 2026.
The most flights from PHL to USIL are scheduled on a Thursday (51 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (17 on average).
How much does it cost to fly round-trip from Philadelphia to Illinois?
How far ahead should I book a flight from Philadelphia to Illinois?
Booking 55 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to Illinois. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest day to fly from Philadelphia to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Illinois. Price data was last updated on May 23, 2026.
Travelers seeking maximum savings on their Philadelphia to Illinois flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated May 28, 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.
Comfort
8.0
Crew
8.6
Food
7.0
Overall
7.9
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Food
7.0
Overall
7.9
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Food
7.0
Overall
7.9
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Food
7.0
Overall
7.9
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Food
7.0
Overall
7.9
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Food
7.0
Overall
7.9
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from Philadelphia to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Philadelphia to Illinois
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Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
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Find flights from Philadelphia to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Philadelphia and Illinois flights
Browse other Philadelphia and Illinois flight options. Last updated on May 28, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Philadelphia to Illinois flights
Consider these flights traveling from Philadelphia to Illinois.
Top 5 airlines flying from Philadelphia to Illinois
Discover the top 5 airlines that operate flights from Philadelphia to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$77 | Average$173 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$83 | Average$337 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$158 | Average$332 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$160 | Average$383 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$162 | Average$348 | FlexibilityNo cancel fee | On-time69% |