$68+ Cheap flights from Illinois to Philadelphia (PHL)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PHL
Aug 5 — Aug 121
Round-trip
1 adult, Economy
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Cheapest flights from Illinois to PhiladelphiaExplore the most affordable flight options available from Illinois to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 6, 2026.
Explore the most affordable flight options available from Illinois to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:52 pm
ORD
- PHL
Nonstop2h 23m
Multiple Airlines
Mon 8/176:33 pm
PHL
- ORD
2 stops19h 17m
Multiple Airlines
Deal found 7/1![Multiple Airlines logo]()
$206
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/311:50 pm
ORD
- PHL
1 stop7h 43m
Frontier
Mon 8/106:11 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 7/1![Frontier logo]()
$207
This Frontier deal was found by Cheapflights users on 7/5. 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 9/66:00 am
ORD
- PHL
Nonstop2h 17m
Frontier
Thu 9/1012:43 pm
PHL
- ORD
1 stop8h 01m
Frontier
Deal found 7/5![Frontier logo]()
$208
This Super.com deal was found by Cheapflights users on 7/5. 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 8/88:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Sun 8/166:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 7/5![Frontier logo]()
$209
This Frontier deal was found by Cheapflights users on 7/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/308:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Mon 8/106:11 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 7/1![Frontier logo]()
$210
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Thu 8/138:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Sun 8/168:30 am
PHL
- ORD
1 stop12h 23m
Frontier
Deal found 7/2![Frontier logo]()
$211
This Frontier deal was found by Cheapflights users on 7/2. 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.
Fri 9/116:50 am
ORD
- PHL
Nonstop2h 10m
Frontier
Sun 9/1311:05 am
PHL
- ORD
Nonstop2h 36m
Frontier
Deal found 7/2![Frontier logo]()
$212
This Frontier deal was found by Cheapflights users on 7/5. 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.
Mon 8/31:50 pm
ORD
- PHL
1 stop7h 43m
Frontier
Sat 8/86:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 7/5![Frontier logo]()
$213
This Booking.com deal was found by Cheapflights users on 7/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:00 am
ORD
- PHL
Nonstop2h 17m
Frontier
Thu 8/2710:22 am
PHL
- ORD
Nonstop2h 33m
Frontier
Deal found 7/6![Frontier logo]()
$215
This Super.com deal was found by Cheapflights users on 7/1. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/68:58 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Thu 7/96:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 7/1![Frontier logo]()
$216
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Fri 7/38:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Sat 7/48:30 am
PHL
- ORD
1 stop12h 20m
Frontier
Deal found 7/2![Frontier logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 7/2. 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 7/2212:11 pm
MDW
- PHL
1 stop18h 04m
Frontier
Tue 8/44:30 pm
PHL
- MDW
1 stop6h 33m
Frontier
Deal found 7/2![Frontier logo]()
$235
Best flights from Illinois to PhiladelphiaDiscover carefully curated flight deals from Illinois to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 6, 2026.
Discover carefully curated flight deals from Illinois to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 6, 2026.
This JetBlue deal was found by Cheapflights users on 7/3. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/211:01 am
ORD
- PHL
1 stop8h 00m
JetBlue
Wed 9/910:45 am
PHL
- ORD
1 stop9h 37m
JetBlue
Deal found 7/3![JetBlue logo]()
$219
This Southwest deal was found by Cheapflights users on 7/1. 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 8/45:55 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Wed 8/51:45 pm
PHL
- MDW
Nonstop2h 05m
Southwest
Deal found 7/1![Southwest logo]()
$253
This United Airlines deal was found by Cheapflights users on 7/2. 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.
Thu 9/36:29 pm
ORD
- PHL
Nonstop2h 14m
United Airlines
Tue 9/85:01 pm
PHL
- ORD
Nonstop2h 31m
United Airlines
Deal found 7/2![United Airlines logo]()
$261
This Delta deal was found by Cheapflights users on 7/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:00 am
MLI
- PHL
1 stop7h 35m
Delta
Tue 10/2012:05 pm
PHL
- MLI
1 stop5h 23m
Delta
Deal found 7/4![Delta logo]()
$261
This American Airlines deal was found by Cheapflights users on 7/6. 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.
Mon 8/36:44 pm
PIA
- PHL
1 stop5h 15m
American Airlines
Mon 8/107:37 pm
PHL
- PIA
1 stop5h 22m
American Airlines
Deal found 7/6![American Airlines logo]()
$309
This JetBlue deal was found by Cheapflights users on 7/3. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/129:38 am
ORD
- PHL
1 stop7h 26m
JetBlue
Mon 9/1410:45 am
PHL
- ORD
1 stop9h 37m
JetBlue
Deal found 7/3![JetBlue logo]()
$219
This Southwest deal was found by Cheapflights users on 7/3. 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.
Sat 8/1511:45 am
MDW
- PHL
Nonstop1h 55m
Southwest
Wed 8/193:05 pm
PHL
- MDW
Nonstop2h 00m
Southwest
Deal found 7/3![Southwest logo]()
$269
This Delta deal was found by Cheapflights users on 7/1. 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.
Sat 8/156:40 am
ORD
- PHL
1 stop5h 04m
Delta
Mon 8/1712:10 pm
PHL
- ORD
1 stop5h 41m
Delta
Deal found 7/1![Delta logo]()
$281
This United Airlines deal was found by Cheapflights users on 7/3. 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.
Sun 8/26:30 pm
MLI
- PHL
1 stop5h 27m
United Airlines
Sat 8/85:00 pm
PHL
- MLI
1 stop7h 16m
United Airlines
Deal found 7/3![United Airlines logo]()
$285
This Southwest deal was found by Cheapflights users on 7/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/15:55 pm
MDW
- PHL
Nonstop2h 05m
Southwest
Sat 8/158:05 am
PHL
- MDW
Nonstop2h 05m
Southwest
Deal found 7/2![Southwest logo]()
$270
This United Airlines deal was found by Cheapflights users on 7/3. 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 9/182:08 pm
MLI
- PHL
1 stop6h 19m
United Airlines
Tue 9/226:25 am
PHL
- MLI
1 stop7h 06m
United Airlines
Deal found 7/3![United Airlines logo]()
$285
This Southwest deal was found by Cheapflights users on 7/3. 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.
Sat 8/156:35 am
MDW
- PHL
1 stop5h 50m
Southwest
Mon 8/1710:20 am
PHL
- MDW
Nonstop2h 05m
Southwest
Deal found 7/3![Southwest logo]()
$279
This Delta deal was found by Cheapflights users on 7/1. 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 11/1812:00 pm
BMI
- PHL
1 stop5h 19m
Delta
Sun 11/225:30 am
PHL
- BMI
1 stop6h 47m
Delta
Deal found 7/1![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 7/4. 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 8/159:05 am
ORD
- PHL
Nonstop2h 18m
United Airlines
Sat 8/156:56 pm
PHL
- ORD
Nonstop2h 30m
United Airlines
Deal found 7/4![United Airlines logo]()
$287
This Delta deal was found by Cheapflights users on 7/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/244:18 pm
BMI
- PHL
1 stop7h 41m
Delta
Sun 7/265:15 am
PHL
- BMI
1 stop7h 08m
Delta
Deal found 7/2![Delta logo]()
$309
This Southwest deal was found by Cheapflights users on 7/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1910:10 am
MDW
- PHL
2 stops10h 35m
Southwest
Mon 8/245:55 am
PHL
- MDW
2 stops7h 20m
Southwest
Deal found 7/2![Southwest logo]()
$291
This Delta deal was found by Cheapflights users on 7/1. 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 11/1812:00 pm
BMI
- PHL
1 stop5h 19m
Delta
Sat 11/218:25 am
PHL
- BMI
1 stop7h 51m
Delta
Deal found 7/1![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 7/4. 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.
Thu 11/56:30 am
PIA
- PHL
1 stop4h 46m
United Airlines
Sun 11/86:25 am
PHL
- PIA
1 stop4h 43m
United Airlines
Deal found 7/4![United Airlines logo]()
$309
This American Airlines deal was found by Cheapflights users on 7/2. 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.
Fri 8/286:00 am
CMI
- PHL
1 stop4h 30m
American Airlines
Sun 8/305:43 am
PHL
- CMI
1 stop6h 28m
American Airlines
Deal found 7/2![American Airlines logo]()
$420
This Southwest deal was found by Cheapflights users on 7/5. 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 8/193:00 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Wed 8/261:55 pm
PHL
- MDW
1 stop6h 20m
Southwest
Deal found 7/5![Southwest logo]()
$297
This Delta deal was found by Cheapflights users on 7/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/184:32 pm
BMI
- PHL
1 stop7h 09m
Delta
Tue 9/225:20 am
PHL
- BMI
1 stop6h 58m
Delta
Deal found 7/3![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 7/5. 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.
Tue 8/49:45 pm
ORD
- PHL
Nonstop2h 12m
United Airlines
Mon 8/106:00 am
PHL
- ORD
Nonstop2h 30m
United Airlines
Deal found 7/5![United Airlines logo]()
$315
This Southwest deal was found by Cheapflights users on 7/4. 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 8/129:25 am
MDW
- PHL
2 stops11h 25m
Southwest
Sat 8/158:05 am
PHL
- MDW
Nonstop2h 05m
Southwest
Deal found 7/4![Southwest logo]()
$302
This United Airlines deal was found by Cheapflights users on 7/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/213:10 pm
BMI
- PHL
1 stop7h 03m
United Airlines
Sun 11/229:55 am
PHL
- BMI
1 stop4h 55m
United Airlines
Deal found 7/1![United Airlines logo]()
$324
This Delta deal was found by Cheapflights users on 7/5. 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.
Wed 7/226:00 am
BMI
- PHL
1 stop6h 24m
Delta
Wed 7/296:25 am
PHL
- BMI
1 stop5h 58m
Delta
Deal found 7/5![Delta logo]()
$324
This American Airlines deal was found by Cheapflights users on 7/1. 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 7/166:55 pm
EVV
- PHL
1 stop5h 04m
American Airlines
Mon 7/205:40 pm
PHL
- EVV
1 stop7h 19m
American Airlines
Deal found 7/1![American Airlines logo]()
$487
This Southwest deal was found by Cheapflights users on 7/4. 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.
Tue 8/41:10 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Mon 8/1012:45 pm
PHL
- MDW
Nonstop2h 00m
Southwest
Deal found 7/4![Southwest logo]()
$315
This United Airlines deal was found by Cheapflights users on 7/3. 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 12/233:10 pm
BMI
- PHL
1 stop7h 03m
United Airlines
Sun 12/2710:10 am
PHL
- BMI
1 stop4h 40m
United Airlines
Deal found 7/3![United Airlines logo]()
$324
This Delta deal was found by Cheapflights users on 7/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/275:30 am
ORD
- PHL
1 stop6h 46m
Delta
Thu 10/2912:22 pm
PHL
- ORD
1 stop5h 02m
Delta
Deal found 7/4![Delta logo]()
$335
This United Airlines deal was found by Cheapflights users on 7/5. 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.
Fri 7/245:43 pm
PIA
- PHL
1 stop6h 14m
United Airlines
Sun 7/266:00 am
PHL
- PIA
1 stop5h 09m
United Airlines
Deal found 7/5![United Airlines logo]()
$324
Last-minute flights from Illinois to PhiladelphiaDiscover last-minute flight deals from Illinois to Philadelphia. Data last updated July 6, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Philadelphia. Data last updated July 6, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Fri 7/38:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Sat 7/48:30 am
PHL
- ORD
1 stop12h 20m
Frontier
Deal found 7/2![Frontier logo]()
$217
This Super.com deal was found by Cheapflights users on 7/1. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/68:58 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Thu 7/96:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 7/1![Frontier logo]()
$216
This Kiwi.com deal was found by Cheapflights users on 7/2. 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 7/2212:11 pm
MDW
- PHL
1 stop18h 04m
Frontier
Tue 8/44:30 pm
PHL
- MDW
1 stop6h 33m
Frontier
Deal found 7/2![Frontier logo]()
$235
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/311:50 pm
ORD
- PHL
1 stop7h 43m
Frontier
Mon 8/106:11 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 7/1![Frontier logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Sat 8/112:11 pm
MDW
- PHL
1 stop6h 09m
Frontier
Sat 8/154:30 pm
PHL
- MDW
1 stop6h 33m
Frontier
Deal found 7/2![Frontier logo]()
$239
This Frontier deal was found by Cheapflights users on 7/5. 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.
Mon 8/31:50 pm
ORD
- PHL
1 stop7h 43m
Frontier
Sat 8/86:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 7/5![Frontier logo]()
$213
This Super.com deal was found by Cheapflights users on 7/5. 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 8/88:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Sun 8/166:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 7/5![Frontier logo]()
$209
This Frontier deal was found by Cheapflights users on 7/5. 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 8/88:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Sat 8/151:32 pm
PHL
- ORD
1 stop7h 21m
Frontier
Deal found 7/5![Frontier logo]()
$210
This Frontier deal was found by Cheapflights users on 7/6. 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 8/88:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Sun 8/96:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 7/6![Frontier logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Thu 8/138:52 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Sun 8/168:30 am
PHL
- ORD
1 stop12h 23m
Frontier
Deal found 7/2![Frontier logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:52 pm
ORD
- PHL
Nonstop2h 23m
Multiple Airlines
Mon 8/176:33 pm
PHL
- ORD
2 stops19h 17m
Multiple Airlines
Deal found 7/1![Multiple Airlines logo]()
$206
This Booking.com deal was found by Cheapflights users on 7/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:00 am
ORD
- PHL
Nonstop2h 17m
Frontier
Thu 8/2710:22 am
PHL
- ORD
Nonstop2h 33m
Frontier
Deal found 7/6![Frontier logo]()
$215
One-way flights from Illinois to PhiladelphiaSearch for one-way flight options from Illinois to Philadelphia. Find affordable one-way fares based on user searches. Data last updated July 6, 2026.
Search for one-way flight options from Illinois to Philadelphia. Find affordable one-way fares based on user searches. Data last updated July 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:34 pm
STL
- PHL
1 stop11h 41m
Frontier
Deal found 7/1![Frontier logo]()
$68
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Mon 8/316:17 pm
STL
- PHL
1 stop17h 09m
Frontier
Deal found 7/2![Frontier logo]()
$70
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/76:17 pm
STL
- PHL
1 stop11h 58m
Frontier
Deal found 7/1![Frontier logo]()
$74
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Sun 9/2710:35 am
STL
- PHL
1 stop11h 36m
Frontier
Deal found 7/2![Frontier logo]()
$75
This Kiwi.com deal was found by Cheapflights users on 7/6. 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.
Mon 7/274:57 pm
STL
- PHL
1 stop13h 18m
Frontier
Deal found 7/6![Frontier logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Sat 8/154:57 pm
STL
- PHL
1 stop13h 18m
Frontier
Deal found 7/2![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Sat 8/14:57 pm
STL
- PHL
1 stop18h 25m
Frontier
Deal found 7/2![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 7/5. 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.
Thu 8/66:34 pm
STL
- PHL
1 stop11h 41m
Frontier
Deal found 7/5![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Fri 10/210:35 am
STL
- PHL
1 stop20h 01m
Frontier
Deal found 7/2![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 7/3. 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.
Sun 10/410:35 am
STL
- PHL
1 stop11h 36m
Frontier
Deal found 7/3![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Tue 10/66:30 am
ORD
- PHL
1 stop24h 06m
Frontier
Deal found 7/2![Frontier logo]()
$103
This Super.com deal was found by Cheapflights users on 7/1. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/38:58 pm
ORD
- PHL
Nonstop2h 23m
Frontier
Deal found 7/1![Frontier logo]()
$106
Find flight deals from Illinois to Philadelphia
Keep the following information in mind while searching for Illinois to Philadelphia flight deals. Data was last updated July 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $206 (Kiwi.com) |
One-way from | $68 (Kiwi.com) |
Popular in | June |
Cheapest in | October |
Average price | $307 |
Good round-trip deal | $294 or less |
Good one-way deal | $174 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Philadelphia 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 July 6, 2026.
Use the filters below to find and compare flights from Illinois to Philadelphia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Wed 9/2
11:01 am-8:01 pm
1 stop8h 00m
Philadelphia
Wed 9/9
10:45 am-7:22 pm
1 stop9h 37m
$219
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Sat 9/12
9:38 am-6:04 pm
1 stop7h 26m
Philadelphia
Mon 9/14
10:45 am-7:22 pm
1 stop9h 37m
$219
ChicagoPhiladelphia
MDW - PHL
MDWPHL
Chicago Midway
Tue 8/4
5:55 pm-8:55 pm
Nonstop2h 00m
Philadelphia
Wed 8/5
1:45 pm-2:50 pm
Nonstop2h 05m
$253
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Thu 9/3
6:29 pm-9:43 pm
Nonstop2h 14m
Philadelphia
Tue 9/8
5:01 pm-6:32 pm
Nonstop2h 31m
$261
MolinePhiladelphia
MLI - PHL
MLIPHL
Moline Quad-City
Sat 10/17
6:00 am-2:35 pm
1 stop7h 35m
Philadelphia
Tue 10/20
12:05 pm-4:28 pm
1 stop5h 23m
$261
Quickest round-trip
ChicagoPhiladelphia
MDW - PHL
MDWPHL
Chicago Midway
Sat 8/15
11:45 am-2:40 pm
Nonstop1h 55m
Philadelphia
Wed 8/19
3:05 pm-4:05 pm
Nonstop2h 00m
$269
ChicagoPhiladelphia
MDW - PHL
MDWPHL
Chicago Midway
Sat 8/1
5:55 pm-9:00 pm
Nonstop2h 05m
Philadelphia
Sat 8/15
8:05 am-9:10 am
Nonstop2h 05m
$270
ChicagoPhiladelphia
MDW - PHL
MDWPHL
Chicago Midway
Sat 8/15
6:35 am-1:25 pm
1 stop5h 50m
Philadelphia
Mon 8/17
10:20 am-11:25 am
Nonstop2h 05m
$279
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Sat 8/15
6:40 am-12:44 pm
1 stop5h 04m
Philadelphia
Mon 8/17
12:10 pm-4:51 pm
1 stop5h 41m
$281
MolinePhiladelphia
MLI - PHL
MLIPHL
Moline Quad-City
Sun 8/2
6:30 pm-12:57 am
1 stop5h 27m
Philadelphia
Sat 8/8
5:00 pm-11:16 pm
1 stop7h 16m
$285
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to Philadelphia
Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Illinois with our price prediction graph.
ORD-PHL
MDW-PHL
MLI-PHL
PIA-PHL
BMI-PHL
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 Illinois to Philadelphia
USIL-PHL
ORD-PHL
MDW-PHL
MLI-PHL
PIA-PHL
What is the cheapest month to book a flight from Illinois to Philadelphia?
Currently, December is the cheapest month in which you can book a flight from Illinois to Philadelphia (average of $50). Flying from Illinois to Philadelphia in March is currently the most expensive (average of $503). 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 IL to PHL?
Find hourly flight availability from Illinois to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 6, 2026.
When flying from Illinois to Philadelphia, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 19% versus a flight in the afternoon.
Weekly flight availability from Illinois to Philadelphia
Explore weekly flight availability from Illinois to Philadelphia. 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 July 6, 2026.
The most flights from USIL to PHL are scheduled on a Friday (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (38 on average).
How much does it cost to fly round-trip from Illinois to Philadelphia?
How far ahead should I book a flight from Illinois to Philadelphia?
Booking 35 days in advance of your planned departure date is, on average, the best time to get cheap flights from Illinois to Philadelphia. 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 Illinois to Philadelphia?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Philadelphia. Price data was last updated on July 4, 2026.
Travelers seeking maximum savings on their Illinois to Philadelphia flight should consider departing on Thursday mornings 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.
Related info for your journey
Find useful and relevant information for your journey from Illinois to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Philadelphia?
Book flights to Philadelphia if you plan to visit one of these locationsWildwood
King of Prussia
Reading
Camden
Ocean City
Cherry Hill
Lewes
Plymouth Meeting
Wyomissing
Dewey Beach
Wildwood Crest
Pottstown
Ephrata
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
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Alternative routes for Illinois to Philadelphia
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Complete your trip
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Search flights from Illinois to Philadelphia by cabin class
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Illinois and Philadelphia flights
Browse other Illinois and Philadelphia flight options. Last updated on July 6, 2026.
Other flights to Philadelphia
Explore flights to Philadelphia departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 6, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Illinois to Philadelphia flights
Consider these flights traveling from Illinois to Philadelphia.
Top 5 airlines flying from Illinois to Philadelphia
Discover the top 5 airlines that operate flights from Illinois to Philadelphia. 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 July 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$67 | Average$159 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$155 | Average$431 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$155 | Average$392 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$167 | Average$383 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$248 | Average$411 | FlexibilityNo cancel fee | On-timeN/A |