$64+ 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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Mar 5 — Mar 121
1 adult, Economy
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Find cheap flights from Philadelphia to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Philadelphia to Illinois
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Cheapest flights from Philadelphia to IllinoisExplore the most affordable flight options available from Philadelphia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 3, 2026.
Explore the most affordable flight options available from Philadelphia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 3, 2026.
This Orbitz deal was found by Cheapflights users on 2/1. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/76:00 am
PHL
- ORD
1 stop14h 11m
Spirit Airlines
Mon 3/98:16 pm
ORD
- PHL
1 stop11h 28m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 2/169:47 pm
PHL
- ORD
Nonstop2h 36m
Frontier
Mon 2/2310:15 am
ORD
- PHL
Nonstop2h 09m
Frontier
Deal found 2/2![Frontier logo]()
$118
This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/255:26 pm
PHL
- ORD
1 stop7h 21m
Spirit Airlines
Wed 3/45:15 am
ORD
- PHL
1 stop13h 37m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$120
This Super.com deal was found by Cheapflights users on 2/3. 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 2/205:30 am
PHL
- ORD
Nonstop2h 36m
Frontier
Mon 2/234:42 pm
ORD
- PHL
1 stop7h 19m
Frontier
Deal found 2/3![Frontier logo]()
$121
This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/198:06 am
PHL
- ORD
1 stop14h 07m
Spirit Airlines
Mon 2/238:16 pm
ORD
- PHL
1 stop11h 28m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/27:35 am
PHL
- ORD
Nonstop2h 36m
Frontier
Mon 3/99:05 pm
ORD
- PHL
1 stop27h 19m
Frontier
Deal found 2/2![Frontier logo]()
$124
This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/185:26 pm
PHL
- ORD
1 stop7h 21m
Spirit Airlines
Mon 2/238:16 pm
ORD
- PHL
1 stop11h 28m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$125
This Super.com deal was found by Cheapflights users on 2/2. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/135:30 am
PHL
- ORD
Nonstop2h 36m
Frontier
Mon 2/165:22 pm
ORD
- PHL
Nonstop2h 09m
Frontier
Deal found 2/2![Frontier logo]()
$126
This Priceline deal was found by Cheapflights users on 2/1. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/2411:40 am
PHL
- MDW
1 stop8h 27m
Frontier
Wed 2/257:00 am
MDW
- PHL
1 stop9h 12m
Frontier
Deal found 2/1![Frontier logo]()
$128
This Cheapflightsfares deal was found by Cheapflights users on 2/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/205:26 pm
PHL
- ORD
1 stop7h 21m
Spirit Airlines
Tue 2/248:16 pm
ORD
- PHL
1 stop11h 28m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$129
This Super.com deal was found by Cheapflights users on 2/1. 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.
Tue 2/2411:40 am
PHL
- MDW
1 stop8h 27m
Frontier
Thu 2/265:16 pm
MDW
- PHL
1 stop6h 45m
Frontier
Deal found 2/1![Frontier logo]()
$137
This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2511:40 am
PHL
- MDW
1 stop8h 27m
Frontier
Mon 3/29:22 pm
MDW
- PHL
1 stop14h 17m
Frontier
Deal found 2/1![Frontier logo]()
$138
Best flights from Philadelphia to IllinoisDiscover carefully curated flight deals from Philadelphia to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 3, 2026.
Discover carefully curated flight deals from Philadelphia to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 3, 2026.
This United Airlines deal was found by Cheapflights users on 2/1. 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 3/218:00 am
PHL
- ORD
Nonstop2h 33m
United Airlines
Sat 3/282:10 pm
ORD
- PHL
Nonstop2h 04m
United Airlines
Deal found 2/1![United Airlines logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 2/277:12 pm
PHL
- STL
1 stop12h 39m
Frontier
Sun 3/13:49 pm
STL
- PHL
1 stop14h 43m
Frontier
Deal found 2/2![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/155:28 pm
PHL
- RFD
1 stop17h 19m
Multiple Airlines
Sun 4/1910:37 am
RFD
- PHL
1 stop11h 33m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$209
This Southwest deal was found by Cheapflights users on 2/1. 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.
Wed 4/87:30 am
PHL
- MDW
Nonstop2h 05m
Southwest
Wed 4/86:10 pm
MDW
- PHL
Nonstop1h 55m
Southwest
Deal found 2/1![Southwest logo]()
$217
This Delta deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/46:05 am
PHL
- ORD
1 stop4h 05m
Delta
Sat 4/119:50 am
ORD
- PHL
1 stop5h 43m
Delta
Deal found 1/31![Delta logo]()
$237
This American Airlines deal was found by Cheapflights users on 2/1. 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.
Mon 3/306:40 pm
PHL
- EVV
1 stop6h 13m
American Airlines
Tue 4/76:23 am
EVV
- PHL
1 stop7h 00m
American Airlines
Deal found 2/1![American Airlines logo]()
$377
This United Airlines deal was found by Cheapflights users on 2/1. 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 4/46:17 am
PHL
- ORD
Nonstop2h 28m
United Airlines
Tue 4/711:05 am
ORD
- PHL
Nonstop2h 11m
United Airlines
Deal found 2/1![United Airlines logo]()
$198
This Southwest deal was found by Cheapflights users on 2/1. 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.
Sat 7/116:20 am
PHL
- ORD
1 stop7h 30m
Southwest
Sat 7/113:10 pm
ORD
- PHL
1 stop7h 45m
Southwest
Deal found 2/1![Southwest logo]()
$220
This Delta deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/812:26 pm
PHL
- ORD
1 stop7h 08m
Delta
Sat 4/1112:15 pm
ORD
- PHL
1 stop5h 52m
Delta
Deal found 1/31![Delta logo]()
$237
This United Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 4/71:27 pm
PHL
- ORD
Nonstop2h 28m
United Airlines
Tue 4/79:40 pm
ORD
- PHL
Nonstop2h 05m
United Airlines
Deal found 1/31![United Airlines logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 2/246:40 pm
PHL
- STL
1 stop13h 11m
Frontier
Thu 2/263:49 pm
STL
- PHL
1 stop18h 52m
Frontier
Deal found 2/2![Frontier logo]()
$250
This Delta deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/49:40 am
PHL
- MDW
1 stop3h 49m
Delta
Tue 4/712:47 pm
MDW
- PHL
1 stop4h 42m
Delta
Deal found 1/31![Delta logo]()
$237
This Southwest deal was found by Cheapflights users on 2/2. 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 4/2211:35 am
PHL
- MDW
Nonstop2h 05m
Southwest
Tue 4/287:55 am
MDW
- PHL
Nonstop1h 55m
Southwest
Deal found 2/2![Southwest logo]()
$239
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 2/2812:33 pm
PHL
- STL
1 stop12h 26m
Frontier
Sun 3/13:49 pm
STL
- PHL
1 stop14h 43m
Frontier
Deal found 2/2![Frontier logo]()
$258
This Delta deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/85:40 am
PHL
- MDW
1 stop7h 22m
Delta
Wed 4/86:07 pm
MDW
- PHL
1 stop5h 50m
Delta
Deal found 1/31![Delta logo]()
$237
This Southwest deal was found by Cheapflights users on 2/1. 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.
Sat 2/215:30 am
PHL
- MDW
Nonstop2h 25m
Southwest
Sat 2/211:55 pm
MDW
- PHL
2 stops7h 00m
Southwest
Deal found 2/1![Southwest logo]()
$248
This Expedia deal was found by Cheapflights users on 2/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/1910:08 pm
PHL
- STL
1 stop10h 14m
Frontier
Thu 3/264:51 pm
STL
- PHL
1 stop14h 45m
Frontier
Deal found 2/2![Frontier logo]()
$259
This United Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 4/710:33 am
PHL
- ORD
1 stop4h 54m
United Airlines
Sat 4/112:20 pm
ORD
- PHL
Nonstop2h 12m
United Airlines
Deal found 1/31![United Airlines logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 5/197:56 pm
PHL
- RFD
1 stop14h 25m
Multiple Airlines
Sun 5/2411:27 am
RFD
- PHL
1 stop11h 32m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$324
This Delta deal was found by Cheapflights users on 2/1. 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 4/116:05 am
PHL
- MDW
1 stop3h 48m
Delta
Tue 4/149:27 am
MDW
- PHL
1 stop6h 10m
Delta
Deal found 2/1![Delta logo]()
$248
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 4/185:05 am
PHL
- STL
2 stops15h 07m
Frontier
Sun 4/1911:21 am
STL
- PHL
1 stop12h 33m
Frontier
Deal found 2/2![Frontier logo]()
$259
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Fri 3/278:00 am
PHL
- ORD
Nonstop2h 33m
United Airlines
Sat 4/411:05 am
ORD
- PHL
Nonstop2h 11m
United Airlines
Deal found 2/1![United Airlines logo]()
$261
This Southwest deal was found by Cheapflights users on 2/1. 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.
Wed 4/112:25 pm
PHL
- MDW
Nonstop2h 15m
Southwest
Mon 4/66:50 pm
MDW
- PHL
Nonstop1h 55m
Southwest
Deal found 2/1![Southwest logo]()
$270
This United Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/46:17 am
PHL
- ORD
Nonstop2h 28m
United Airlines
Fri 4/1011:05 am
ORD
- PHL
Nonstop2h 11m
United Airlines
Deal found 1/31![United Airlines logo]()
$261
This Delta deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 2/184:59 pm
PHL
- MLI
1 stop6h 25m
Delta
Sat 2/215:01 pm
MLI
- PHL
1 stop6h 23m
Delta
Deal found 1/31![Delta logo]()
$265
This Southwest deal was found by Cheapflights users on 2/1. 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 4/72:00 pm
PHL
- MDW
Nonstop2h 10m
Southwest
Thu 4/96:45 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 2/1![Southwest logo]()
$270
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Fri 6/198:26 pm
PHL
- ORD
Nonstop2h 33m
United Airlines
Sat 6/209:06 am
ORD
- PHL
Nonstop2h 19m
United Airlines
Deal found 2/1![United Airlines logo]()
$261
This Delta deal was found by Cheapflights users on 2/1. 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.
Fri 3/136:25 pm
PHL
- MLI
1 stop5h 05m
Delta
Mon 3/165:15 pm
MLI
- PHL
1 stop6h 42m
Delta
Deal found 2/1![Delta logo]()
$269
This Southwest deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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.
Mon 4/67:05 pm
PHL
- MDW
Nonstop2h 20m
Southwest
Sat 4/113:35 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Deal found 1/31![Southwest logo]()
$270
This United Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 4/97:45 pm
PHL
- ORD
1 stop4h 58m
United Airlines
Sat 4/112:20 pm
ORD
- PHL
Nonstop2h 12m
United Airlines
Deal found 1/31![United Airlines logo]()
$261
Last-minute flights from Philadelphia to IllinoisDiscover last-minute flight deals from Philadelphia to Illinois. Data last updated February 3, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Illinois. Data last updated February 3, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 2/2. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/135:30 am
PHL
- ORD
Nonstop2h 36m
Frontier
Mon 2/165:22 pm
ORD
- PHL
Nonstop2h 09m
Frontier
Deal found 2/2![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 2/169:47 pm
PHL
- ORD
Nonstop2h 36m
Frontier
Mon 2/2310:15 am
ORD
- PHL
Nonstop2h 09m
Frontier
Deal found 2/2![Frontier logo]()
$118
This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/185:26 pm
PHL
- ORD
1 stop7h 21m
Spirit Airlines
Mon 2/238:16 pm
ORD
- PHL
1 stop11h 28m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$125
This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/198:06 am
PHL
- ORD
1 stop14h 07m
Spirit Airlines
Mon 2/238:16 pm
ORD
- PHL
1 stop11h 28m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$123
This Super.com deal was found by Cheapflights users on 2/3. 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 2/205:30 am
PHL
- ORD
Nonstop2h 36m
Frontier
Mon 2/234:42 pm
ORD
- PHL
1 stop7h 19m
Frontier
Deal found 2/3![Frontier logo]()
$121
This Cheapflightsfares deal was found by Cheapflights users on 2/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/205:26 pm
PHL
- ORD
1 stop7h 21m
Spirit Airlines
Tue 2/248:16 pm
ORD
- PHL
1 stop11h 28m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$129
This Priceline deal was found by Cheapflights users on 2/1. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/2411:40 am
PHL
- MDW
1 stop8h 27m
Frontier
Wed 2/257:00 am
MDW
- PHL
1 stop9h 12m
Frontier
Deal found 2/1![Frontier logo]()
$128
This Super.com deal was found by Cheapflights users on 2/1. 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.
Tue 2/2411:40 am
PHL
- MDW
1 stop8h 27m
Frontier
Thu 2/265:16 pm
MDW
- PHL
1 stop6h 45m
Frontier
Deal found 2/1![Frontier logo]()
$137
This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/255:26 pm
PHL
- ORD
1 stop7h 21m
Spirit Airlines
Wed 3/45:15 am
ORD
- PHL
1 stop13h 37m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$120
This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2511:40 am
PHL
- MDW
1 stop8h 27m
Frontier
Mon 3/29:22 pm
MDW
- PHL
1 stop14h 17m
Frontier
Deal found 2/1![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/27:35 am
PHL
- ORD
Nonstop2h 36m
Frontier
Mon 3/99:05 pm
ORD
- PHL
1 stop27h 19m
Frontier
Deal found 2/2![Frontier logo]()
$124
This Orbitz deal was found by Cheapflights users on 2/1. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/76:00 am
PHL
- ORD
1 stop14h 11m
Spirit Airlines
Mon 3/98:16 pm
ORD
- PHL
1 stop11h 28m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$117
One-way flights from Philadelphia to IllinoisSearch for one-way flight options from Philadelphia to Illinois. Find affordable one-way fares based on user searches. Data last updated February 3, 2026.
Search for one-way flight options from Philadelphia to Illinois. Find affordable one-way fares based on user searches. Data last updated February 3, 2026.
This Frontier deal was found by Cheapflights users on 2/1. 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.
Wed 2/253:45 pm
PHL
- STL
1 stop7h 42m
Frontier
Deal found 2/1![Frontier logo]()
$64
This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/59:39 am
PHL
- ORD
1 stop9h 39m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$68
This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/189:53 am
PHL
- ORD
1 stop9h 38m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Wed 3/186:12 pm
PHL
- MDW
1 stop20h 29m
Frontier
Deal found 2/1![Frontier logo]()
$69
This Mytrip deal was found by Cheapflights users on 2/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/166:08 pm
PHL
- ORD
1 stop18h 09m
Spirit Airlines
Deal found 2/3![Spirit Airlines logo]()
$70
This Cheapflightsfares deal was found by Cheapflights users on 2/2. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/146:48 am
PHL
- ORD
1 stop14h 03m
Spirit Airlines
Deal found 2/2![Spirit Airlines logo]()
$71
This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/285:26 pm
PHL
- ORD
1 stop7h 21m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$72
This Super.com deal was found by Cheapflights users on 2/2. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/234:29 pm
PHL
- ORD
1 stop7h 46m
Frontier
Deal found 2/2![Frontier logo]()
$73
This Trip.com deal was found by Cheapflights users on 2/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1011:52 am
PHL
- MDW
1 stop10h 02m
Frontier
Deal found 2/2![Frontier logo]()
$73
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 3/37:46 pm
PHL
- STL
1 stop27h 41m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$73
This Frontier deal was found by Cheapflights users on 2/3. 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.
Sat 2/285:30 am
PHL
- ORD
1 stop6h 21m
Frontier
Deal found 2/3![Frontier logo]()
$74
This Priceline deal was found by Cheapflights users on 2/1. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/234:29 pm
PHL
- STL
1 stop8h 30m
Frontier
Deal found 2/1![Frontier logo]()
$74
Find flight deals from Philadelphia to Illinois
Keep the following information in mind while searching for Philadelphia to Illinois flight deals. Data was last updated February 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $117 (Orbitz) |
One-way from | $64 (Frontier) |
Popular in | February |
Cheapest in | September |
Average price | $323 |
Good round-trip deal | $332 or less |
Good one-way deal | $175 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Philadelphia to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 3, 2026.
Use the filters below to find and compare flights from Philadelphia to Illinois that are best for you.
Fly from
Philadelphia
Fly to
Illinois
Route
Depart
Return
Price
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Sat 3/21
8:00 am-9:33 am
Nonstop2h 33m
Chicago O'Hare Intl
Sat 3/28
2:10 pm-5:14 pm
Nonstop2h 04m
$179
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Fri 2/27
7:12 pm-6:51 am
1 stop12h 39m
Lambert-St Louis
Sun 3/1
3:49 pm-7:32 am
1 stop14h 43m
$190
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Sat 4/4
6:17 am-7:45 am
Nonstop2h 28m
Chicago O'Hare Intl
Tue 4/7
11:05 am-2:16 pm
Nonstop2h 11m
$198
PhiladelphiaChicago
PHL - RFD
PHLRFD
Philadelphia
Wed 4/15
5:28 pm-9:47 am
1 stop17h 19m
Chicago Greater Rockford
Sun 4/19
10:37 am-11:10 pm
1 stop11h 33m
$209
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Wed 4/8
7:30 am-8:35 am
Nonstop2h 05m
Chicago Midway
Wed 4/8
6:10 pm-9:05 pm
Nonstop1h 55m
$217
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Tue 4/7
1:27 pm-2:55 pm
Nonstop2h 28m
Chicago O'Hare Intl
Tue 4/7
9:40 pm-12:45 am
Nonstop2h 05m
$217
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Sat 7/11
6:20 am-12:50 pm
1 stop7h 30m
Chicago O'Hare Intl
Sat 7/11
3:10 pm-11:55 pm
1 stop7h 45m
$220
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Sat 4/4
6:05 am-9:10 am
1 stop4h 05m
Chicago O'Hare Intl
Sat 4/11
9:50 am-4:33 pm
1 stop5h 43m
$237
PhiladelphiaChicago
PHL - ORD
PHLORD
Philadelphia
Wed 4/8
12:26 pm-6:34 pm
1 stop7h 08m
Chicago O'Hare Intl
Sat 4/11
12:15 pm-7:07 pm
1 stop5h 52m
$237
PhiladelphiaChicago
PHL - MDW
PHLMDW
Philadelphia
Sat 4/4
9:40 am-12:29 pm
1 stop3h 49m
Chicago Midway
Tue 4/7
12:47 pm-6:29 pm
1 stop4h 42m
$237
Showing 1-10 of 60 results
Best time to book a flight from Philadelphia to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Philadelphia with our price prediction graph.
PHL-ORD
PHL-RFD
PHL-MDW
PHL-STL
PHL-PIA
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-STL
What is the cheapest month to book a flight from Philadelphia to Illinois?
Currently, December is the cheapest month in which you can book a flight from Philadelphia to Illinois (average of $48). Flying from Philadelphia to Illinois in July is currently the most expensive (average of $119). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from PHL to IL?
Find hourly flight availability from Philadelphia to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 3, 2026.
It’s optimal to fly from Philadelphia to Illinois in the evening. By choosing this option you can save up to 33% on the cost of your flight, compared to a flight at noon.
What is the cheapest day to fly from Philadelphia to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Illinois. Price data was last updated on January 31, 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. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Philadelphia to Illinois
Explore weekly flight availability from Philadelphia to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated February 3, 2026.
The most flights from PHL to USIL are scheduled on a Friday (40 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (17 on average).
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated February 3, 2026.
See what other customers who have flown with Southwest, Delta, and United Airlines from Philadelphia to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Philadelphia to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Philadelphia to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from Philadelphia to Illinois
Discover the top 5 airlines that operate flights from Philadelphia to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$74 | Average$173 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$98 | Average$347 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$155 | Average$379 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$159 | Average$319 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$164 | Average$406 | FlexibilityNo cancel fee | On-time71% |