$87+ 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 7/28. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Jul 6 — Jul 131
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 June 6, 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 June 6, 2026.
This Expedia deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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.
Fri 7/35:06 pm
PHL
- ORD
Nonstop2h 41m
Multiple Airlines
Fri 7/1010:56 am
ORD
- PHL
1 stop8h 04m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 8/2011:35 am
PHL
- ORD
1 stop9h 54m
Frontier
Sat 8/227:52 pm
ORD
- PHL
Nonstop2h 28m
Frontier
Deal found 6/3![Frontier logo]()
$200
This Frontier deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 7/236:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Sat 8/18:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Deal found 6/2![Frontier logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 6/5. 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 8/146:11 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Sat 8/227:52 pm
ORD
- PHL
Nonstop2h 28m
Frontier
Deal found 6/5![Frontier logo]()
$202
This Frontier deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/116:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Thu 7/168:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Deal found 6/4![Frontier logo]()
$203
This CheapOair deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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.
Fri 7/35:06 pm
PHL
- ORD
Nonstop2h 41m
Multiple Airlines
Wed 7/810:56 am
ORD
- PHL
1 stop8h 04m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$204
This Super.com deal was found by Cheapflights users on 6/5. 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.
Sat 7/186:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Thu 7/235:13 pm
ORD
- PHL
1 stop6h 38m
Frontier
Deal found 6/5![Frontier logo]()
$205
This Frontier deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 9/35:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Sun 9/67:52 pm
ORD
- PHL
Nonstop2h 28m
Frontier
Deal found 6/4![Frontier logo]()
$206
This Super.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 7/206:11 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Thu 7/238:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Deal found 6/4![Frontier logo]()
$207
This Frontier deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/186:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Mon 7/207:05 am
ORD
- PHL
1 stop11h 15m
Frontier
Deal found 6/4![Frontier logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 8/54:30 pm
PHL
- MDW
1 stop6h 33m
Frontier
Thu 8/2012:27 pm
MDW
- PHL
1 stop5h 50m
Frontier
Deal found 6/3![Frontier logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 8/58:30 am
PHL
- ORD
1 stop12h 23m
Frontier
Tue 8/181:50 pm
ORD
- PHL
1 stop7h 39m
Frontier
Deal found 6/3![Frontier logo]()
$210
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 June 6, 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 June 6, 2026.
This JetBlue deal was found by Cheapflights users on 6/5. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:00 am
PHL
- ORD
1 stop8h 20m
JetBlue
Mon 9/142:15 pm
ORD
- PHL
1 stop7h 17m
JetBlue
Deal found 6/5![JetBlue logo]()
$219
This Kiwi.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 6/178:00 am
PHL
- RFD
1 stop27h 37m
Multiple Airlines
Sun 6/2811:27 am
RFD
- PHL
1 stop12h 17m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$239
This United Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:40 pm
PHL
- ORD
1 stop5h 00m
United Airlines
Wed 8/122:30 pm
ORD
- PHL
Nonstop2h 24m
United Airlines
Deal found 6/2![United Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” 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 8/47:15 am
PHL
- MDW
1 stop4h 40m
Southwest
Tue 8/111:00 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 6/1![Southwest logo]()
$257
This American Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 8/811:43 am
MLI
- PHL
1 stop6h 36m
American Airlines
Deal found 6/2![American Airlines logo]()
$285
This Delta deal was found by Cheapflights users on 6/5. 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.
Tue 10/134:05 pm
PHL
- MLI
1 stop7h 25m
Delta
Sun 10/185:00 pm
MLI
- PHL
1 stop6h 21m
Delta
Deal found 6/5![Delta logo]()
$295
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 6/248:00 am
PHL
- RFD
1 stop27h 37m
Multiple Airlines
Thu 7/211:27 am
RFD
- PHL
1 stop12h 17m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$287
This Southwest deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” 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 8/1810:45 am
PHL
- STL
1 stop5h 25m
Southwest
Tue 8/2510:55 am
STL
- PHL
Nonstop2h 10m
Southwest
Deal found 6/1![Southwest logo]()
$287
This United Airlines deal was found by Cheapflights users on 6/5. 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.
Sat 9/1910:30 am
PHL
- ORD
1 stop4h 57m
United Airlines
Tue 9/226:13 pm
ORD
- PHL
Nonstop2h 14m
United Airlines
Deal found 6/5![United Airlines logo]()
$297
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 7/82:59 pm
PHL
- RFD
1 stop20h 38m
Multiple Airlines
Sun 7/1211:27 am
RFD
- PHL
1 stop12h 12m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$291
This Southwest deal was found by Cheapflights users on 6/5. 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 7/14:35 pm
PHL
- MDW
Nonstop2h 25m
Southwest
Mon 7/66:00 pm
MDW
- PHL
1 stop4h 55m
Southwest
Deal found 6/5![Southwest logo]()
$305
This Delta deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” 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 6/165:12 pm
PHL
- BMI
1 stop6h 35m
Delta
Sat 6/2012:09 pm
BMI
- PHL
1 stop5h 48m
Delta
Deal found 6/1![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 7/176:00 am
PHL
- PAH
1 stop7h 52m
United Airlines
Mon 7/205:00 am
PAH
- PHL
1 stop6h 25m
United Airlines
Deal found 6/3![United Airlines logo]()
$311
This American Airlines deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 10/1410:35 am
PHL
- EVV
1 stop6h 29m
American Airlines
Wed 10/216:06 pm
EVV
- PHL
1 stop4h 53m
American Airlines
Deal found 6/4![American Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 8/76:35 pm
PHL
- MDW
1 stop4h 20m
Southwest
Tue 8/115:55 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 6/3![Southwest logo]()
$311
This United Airlines deal was found by Cheapflights users on 6/5. 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 7/226:00 am
PHL
- PIA
1 stop7h 38m
United Airlines
Sun 7/266:12 pm
PIA
- PHL
1 stop5h 45m
United Airlines
Deal found 6/5![United Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 6/5. 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 7/34:10 pm
PHL
- BMI
1 stop7h 37m
Delta
Tue 7/76:00 am
BMI
- PHL
1 stop6h 24m
Delta
Deal found 6/5![Delta logo]()
$355
This American Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 9/127:39 pm
PHL
- EVV
1 stop5h 19m
American Airlines
Sun 9/134:53 pm
EVV
- PHL
1 stop6h 19m
American Airlines
Deal found 6/2![American Airlines logo]()
$379
This Southwest deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” 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 9/292:45 pm
PHL
- STL
Nonstop2h 20m
Southwest
Sat 10/36:05 am
STL
- PHL
2 stops9h 10m
Southwest
Deal found 6/1![Southwest logo]()
$316
This United Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 6/178:05 am
PHL
- PAH
1 stop5h 54m
United Airlines
Sun 6/215:00 am
PAH
- PHL
1 stop6h 25m
United Airlines
Deal found 6/2![United Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/166:33 pm
PHL
- RFD
1 stop14h 16m
Multiple Airlines
Sun 7/1911:27 am
RFD
- PHL
2 stops11h 19m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$379
This American Airlines deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/22:00 pm
PHL
- MLI
1 stop5h 16m
American Airlines
Sun 7/57:12 pm
MLI
- PHL
1 stop4h 47m
American Airlines
Deal found 6/1![American Airlines logo]()
$388
This Southwest deal was found by Cheapflights users on 6/5. 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.
Sat 7/1811:25 am
PHL
- MDW
Nonstop2h 10m
Southwest
Mon 7/206:00 pm
MDW
- PHL
1 stop4h 55m
Southwest
Deal found 6/5![Southwest logo]()
$325
This Delta deal was found by Cheapflights users on 6/5. 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.
Tue 6/305:15 am
PHL
- EVV
1 stop5h 13m
Delta
Fri 7/31:46 pm
EVV
- PHL
1 stop6h 33m
Delta
Deal found 6/5![Delta logo]()
$394
This United Airlines deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 6/275:00 pm
PHL
- ORD
Nonstop2h 33m
United Airlines
Sat 7/45:59 pm
ORD
- PHL
Nonstop2h 20m
United Airlines
Deal found 6/4![United Airlines logo]()
$338
This Southwest deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 8/121:55 pm
PHL
- MDW
1 stop6h 20m
Southwest
Mon 8/172:55 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 6/4![Southwest logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 8/78:10 am
PHL
- RFD
1 stop10h 26m
Multiple Airlines
Sun 8/911:37 am
RFD
- PHL
1 stop12h 11m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$394
This Delta deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” 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 6/175:15 am
PHL
- ORD
1 stop5h 58m
Delta
Sat 6/275:22 pm
ORD
- PHL
1 stop4h 55m
Delta
Deal found 6/1![Delta logo]()
$409
This United Airlines deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 9/26:25 am
PHL
- MLI
1 stop6h 57m
United Airlines
Sat 9/55:09 pm
MLI
- PHL
1 stop6h 50m
United Airlines
Deal found 6/3![United Airlines logo]()
$341
This American Airlines deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 6/175:15 am
PHL
- PIA
1 stop5h 08m
American Airlines
Thu 6/257:11 pm
PIA
- PHL
1 stop4h 28m
American Airlines
Deal found 6/4![American Airlines logo]()
$429
Last-minute flights from Philadelphia to IllinoisDiscover last-minute flight deals from Philadelphia to Illinois. Data last updated June 6, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Illinois. Data last updated June 6, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 6/3![Frontier logo]()
$210
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 7/14:35 pm
PHL
- MDW
1 stop6h 36m
Frontier
Wed 7/86:05 am
MDW
- PHL
1 stop15h 23m
Frontier
Deal found 6/3![Frontier logo]()
$235
This Expedia deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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.
Fri 7/35:06 pm
PHL
- ORD
Nonstop2h 41m
Multiple Airlines
Fri 7/1010:56 am
ORD
- PHL
1 stop8h 04m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$199
This CheapOair deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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.
Fri 7/35:06 pm
PHL
- ORD
Nonstop2h 41m
Multiple Airlines
Wed 7/810:56 am
ORD
- PHL
1 stop8h 04m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$204
This Frontier deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Sat 7/118:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Deal found 6/3![Frontier logo]()
$212
This Frontier deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/116:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Thu 7/168:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Deal found 6/4![Frontier logo]()
$203
This Expedia deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 7/116:05 pm
PHL
- ORD
Nonstop2h 42m
Multiple Airlines
Thu 7/1610:56 am
ORD
- PHL
1 stop8h 04m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$213
This Super.com deal was found by Cheapflights users on 6/5. 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.
Sat 7/186:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Thu 7/235:13 pm
ORD
- PHL
1 stop6h 38m
Frontier
Deal found 6/5![Frontier logo]()
$205
This Super.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 7/186:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Sun 7/198:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Deal found 6/4![Frontier logo]()
$206
This Frontier deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/186:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Mon 7/207:05 am
ORD
- PHL
1 stop11h 15m
Frontier
Deal found 6/4![Frontier logo]()
$208
This Super.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 7/206:11 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Thu 7/238:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Deal found 6/4![Frontier logo]()
$207
This Frontier deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 7/236:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Sat 8/18:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Deal found 6/2![Frontier logo]()
$201
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 June 6, 2026.
Search for one-way flight options from Philadelphia to Illinois. Find affordable one-way fares based on user searches. Data last updated June 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 7/289:16 pm
PHL
- STL
1 stop27h 43m
Frontier
Deal found 6/3![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 9/210:11 am
PHL
- STL
1 stop15h 03m
Frontier
Deal found 6/3![Frontier logo]()
$88
This Trip.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/26:30 am
PHL
- STL
1 stop12h 00m
Frontier
Deal found 6/4![Frontier logo]()
$92
This Super.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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
Deal found 6/3![Frontier logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/258:30 am
PHL
- STL
1 stop10h 00m
Frontier
Deal found 6/4![Frontier logo]()
$97
This iWofly deal was found by Cheapflights users on 6/5. 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 iWofly 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
Deal found 6/5![Frontier logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Tue 6/308:30 am
PHL
- STL
1 stop10h 00m
Frontier
Deal found 6/5![Frontier logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 8/278:30 am
PHL
- STL
1 stop10h 00m
Frontier
Deal found 6/3![Frontier logo]()
$101
This Trip.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/244:40 pm
PHL
- STL
1 stop17h 17m
Frontier
Deal found 6/3![Frontier logo]()
$102
This Super.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 7/206:11 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 6/4![Frontier logo]()
$103
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 9/14:35 pm
PHL
- MDW
1 stop6h 36m
Frontier
Deal found 6/4![Frontier logo]()
$104
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/34:35 pm
PHL
- STL
1 stop17h 17m
Frontier
Deal found 6/3![Frontier logo]()
$105
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 June 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $198 (Frontier) |
One-way from | $87 (Kiwi.com) |
Popular in | March |
Cheapest in | January |
Average price | $304 |
Good round-trip deal | $308 or less |
Good one-way deal | $160 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 June 6, 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 9/10
6:00 am-1:20 pm
1 stop8h 20m
Chicago O'Hare Intl
Mon 9/14
2:15 pm-10:32 pm
1 stop7h 17m
$219
PhiladelphiaChicago
PHL - RFD
PHLRFD
Philadelphia
Wed 6/17
8:00 am-10:37 am
1 stop27h 37m
Chicago Greater Rockford
Sun 6/28
11:27 am-12:44 am
1 stop12h 17m
$239
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Tue 8/11
7:40 pm-11:40 pm
1 stop5h 00m
Chicago O'Hare Intl
Wed 8/12
2:30 pm-5:54 pm
Nonstop2h 24m
$257
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Tue 8/4
7:15 am-10:55 am
1 stop4h 40m
Chicago Midway
Tue 8/11
1:00 pm-4:00 pm
Nonstop2h 00m
$257
PhiladelphiaMoline
PHL - MLI
PHLMLI
Philadelphia
Sat 7/25
5:06 am-10:58 am
1 stop6h 52m
Moline Quad-City
Sat 8/8
11:43 am-7:19 pm
1 stop6h 36m
$285
PhiladelphiaChicago
PHL - RFD
PHLRFD
Philadelphia
Wed 6/24
8:00 am-10:37 am
1 stop27h 37m
Chicago Greater Rockford
Thu 7/2
11:27 am-12:44 am
1 stop12h 17m
$287
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Tue 8/18
10:45 am-3:10 pm
1 stop5h 25m
Lambert-St Louis
Tue 8/25
10:55 am-2:05 pm
Nonstop2h 10m
$287
PhiladelphiaChicago
PHL - RFD
PHLRFD
Philadelphia
Wed 7/8
2:59 pm-10:37 am
1 stop20h 38m
Chicago Greater Rockford
Sun 7/12
11:27 am-12:39 am
1 stop12h 12m
$291
PhiladelphiaMoline
PHL - MLI
PHLMLI
Philadelphia
Tue 10/13
4:05 pm-10:30 pm
1 stop7h 25m
Moline Quad-City
Sun 10/18
5:00 pm-12:21 am
1 stop6h 21m
$295
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Sat 9/19
10:30 am-2:27 pm
1 stop4h 57m
Chicago O'Hare Intl
Tue 9/22
6:13 pm-9:27 pm
Nonstop2h 14m
$297
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-RFD
PHL-MDW
PHL-MLI
PHL-STL
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-RFD
PHL-MDW
PHL-MLI
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 January is currently the most expensive (average of $795). 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 June 6, 2026.
It’s optimal to fly from Philadelphia to Illinois in the evening. By choosing this option you can save up to 27% 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 June 6, 2026.
The most flights from PHL to USIL are scheduled on a Friday (53 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (19 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 30, 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 June 6, 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.
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
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 June 6, 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 June 6, 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$161 | Average$386 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$161 | Average$346 | FlexibilityNo cancel fee | On-time69% |