$66+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Sep 5 — Sep 121
Round-trip
1 adult, Economy
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Find cheap flights from Philadelphia to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Philadelphia to IllinoisExplore the most affordable flight options available from Philadelphia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 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 August 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 9/288:41 am -
1 stop5h 29m
Mon 10/52:29 pm -
1 stop7h 49m
Deal found 8/2![Frontier logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 9/24:45 pm -
1 stop25h 37m
Mon 9/76:17 pm -
1 stop11h 58m
Deal found 8/1![Frontier logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Mon 9/148:41 am -
1 stop5h 29m
Mon 9/212:29 pm -
1 stop15h 47m
Deal found 8/3![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 9/48:30 am -
1 stop9h 52m
Mon 9/76:17 pm -
1 stop11h 58m
Deal found 8/3![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 8/5. 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.
Sat 8/294:45 pm -
1 stop25h 37m
Mon 9/76:17 pm -
1 stop11h 58m
Deal found 8/5![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Mon 8/318:30 am -
1 stop9h 52m
Mon 9/76:17 pm -
1 stop11h 58m
Deal found 8/3![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 9/38:30 am -
1 stop9h 52m
Mon 9/76:17 pm -
1 stop11h 58m
Deal found 8/5![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 9/105:32 pm -
1 stop20h 38m
Mon 9/142:29 pm -
1 stop7h 49m
Deal found 8/3![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 10/145:38 pm -
1 stop17h 02m
Sun 11/110:35 am -
1 stop20h 01m
Deal found 8/4![Frontier logo]()
$154
This Super.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/35:30 pm -
Nonstop2h 42m
Thu 9/106:00 am -
1 stop7h 21m
Deal found 8/6![Frontier logo]()
$174
This Frontier deal was found by Cheapflights users on 8/3. 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.
Mon 8/316:00 am -
Nonstop2h 29m
Wed 9/27:44 pm -
1 stop10h 50m
Deal found 8/3![Frontier logo]()
$175
This Frontier deal was found by Cheapflights users on 8/3. 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 9/46:00 am -
Nonstop2h 29m
Sun 9/65:55 am -
Nonstop2h 09m
Deal found 8/3![Frontier logo]()
$176
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 August 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 August 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Thu 10/15:45 pm -
1 stop15h 14m
Sun 10/410:08 am -
1 stop12h 34m
Deal found 8/1![Multiple Airlines logo]()
$240
This Delta deal was found by Cheapflights users on 8/2. 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.
Wed 11/1810:32 am -
1 stop6h 50m
Tue 11/245:13 pm -
1 stop6h 42m
Deal found 8/2![Delta logo]()
$271
This Southwest deal was found by Cheapflights users on 8/2. 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 9/511:55 am -
Nonstop2h 20m
Sun 9/65:50 pm -
Nonstop2h 10m
Deal found 8/2![Southwest logo]()
$277
This KAYAK deal was found by Cheapflights users on 8/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/318:20 am -
Nonstop2h 25m
Wed 9/211:22 am -
Nonstop2h 18m
Deal found 8/5![United Airlines logo]()
$279
This American Airlines deal was found by Cheapflights users on 8/4. 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.
Thu 9/35:43 am -
1 stop6h 30m
Wed 9/96:00 am -
2 stops7h 40m
Deal found 8/4![American Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Thu 10/297:20 pm -
2 stops13h 34m
Mon 11/25:55 pm -
1 stop17h 37m
Deal found 8/6![Multiple Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/112:05 pm -
Nonstop2h 05m
Mon 9/143:20 pm -
1 stop5h 45m
Deal found 8/5![Southwest logo]()
$278
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Thu 9/310:34 am -
1 stop5h 35m
Wed 9/910:42 am -
1 stop6h 12m
Deal found 8/5![United Airlines logo]()
$295
This Delta deal was found by Cheapflights users on 8/2. 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.
Tue 11/175:15 am -
1 stop6h 05m
Mon 11/235:13 pm -
1 stop6h 34m
Deal found 8/2![Delta logo]()
$295
This Kiwi.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/305:32 pm -
2 stops16h 08m
Sun 10/410:08 am -
1 stop12h 34m
Deal found 8/5![Multiple Airlines logo]()
$271
This Southwest deal was found by Cheapflights users on 8/4. 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 9/13:05 pm -
Nonstop2h 00m
Tue 9/85:55 pm -
Nonstop2h 05m
Deal found 8/4![Southwest logo]()
$279
This American Airlines deal was found by Cheapflights users on 8/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2910:30 am -
1 stop4h 27m
Tue 11/35:00 am -
2 stops6h 45m
Deal found 8/3![American Airlines logo]()
$324
This Delta deal was found by Cheapflights users on 8/2. 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.
Thu 11/1912:09 pm -
1 stop5h 13m
Sat 11/215:13 pm -
1 stop6h 42m
Deal found 8/2![Delta logo]()
$295
This Southwest deal was found by Cheapflights users on 8/3. 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.
Wed 8/263:05 pm -
Nonstop2h 00m
Wed 9/28:30 am -
Nonstop2h 05m
Deal found 8/3![Southwest logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 9/105:45 pm -
1 stop16h 07m
Sun 9/133:53 pm -
1 stop8h 14m
Deal found 8/2![Multiple Airlines logo]()
$286
This United Airlines deal was found by Cheapflights users on 8/1. 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 10/29:34 am -
Nonstop2h 25m
Mon 10/511:25 am -
Nonstop2h 18m
Deal found 8/1![United Airlines logo]()
$316
This Delta deal was found by Cheapflights users on 8/2. 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.
Thu 11/1912:09 pm -
1 stop5h 13m
Wed 11/256:00 am -
1 stop7h 28m
Deal found 8/2![Delta logo]()
$295
This Southwest deal was found by Cheapflights users on 8/5. 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.
Thu 10/13:20 pm -
Nonstop2h 05m
Mon 10/51:30 pm -
Nonstop1h 55m
Deal found 8/5![Southwest logo]()
$279
This American Airlines deal was found by Cheapflights users on 8/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:30 am -
1 stop6h 37m
Sat 8/225:00 am -
1 stop5h 30m
Deal found 8/3![American Airlines logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 10/206:00 am -
1 stop29h 14m
Sun 10/251:12 pm -
1 stop6h 36m
Deal found 8/4![Multiple Airlines logo]()
$292
This United Airlines deal was found by Cheapflights users on 8/3. 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 9/1111:04 am -
Nonstop2h 25m
Sun 9/136:13 pm -
Nonstop2h 14m
Deal found 8/3![United Airlines logo]()
$331
This Delta deal was found by Cheapflights users on 8/2. 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 11/205:15 am -
1 stop6h 05m
Sun 11/225:13 pm -
1 stop6h 34m
Deal found 8/2![Delta logo]()
$319
This Southwest deal was found by Cheapflights users on 8/4. 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.
Sun 9/63:25 pm -
2 stops8h 20m
Sat 9/127:55 am -
2 stops7h 15m
Deal found 8/4![Southwest logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Sat 9/57:20 am -
1 stop9h 29m
Sat 9/124:42 pm -
1 stop6h 27m
Deal found 8/3![Multiple Airlines logo]()
$305
This United Airlines deal was found by Cheapflights users on 8/5. 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 9/16:56 pm -
1 stop4h 47m
Mon 9/75:45 am -
1 stop5h 38m
Deal found 8/5![United Airlines logo]()
$342
This Delta deal was found by Cheapflights users on 8/5. 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 10/165:20 am -
1 stop6h 02m
Mon 10/196:00 am -
1 stop7h 31m
Deal found 8/5![Delta logo]()
$319
This KAYAK deal was found by Cheapflights users on 8/3. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/257:05 am -
1 stop6h 28m
Fri 10/307:55 am -
1 stop5h 42m
Deal found 8/3![American Airlines logo]()
$396
This Southwest deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:40 pm -
Nonstop2h 20m
Fri 10/301:05 pm -
1 stop4h 25m
Deal found 8/5![Southwest logo]()
$303
This United Airlines deal was found by Cheapflights users on 8/2. 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.
Sun 9/276:10 am -
Nonstop2h 25m
Tue 9/296:15 pm -
Nonstop2h 14m
Deal found 8/2![United Airlines logo]()
$342
This Delta deal was found by Cheapflights users on 8/5. 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 10/165:20 am -
1 stop7h 06m
Wed 10/2112:13 pm -
1 stop7h 12m
Deal found 8/5![Delta logo]()
$319
Last-minute flights from Philadelphia to IllinoisDiscover last-minute flight deals from Philadelphia to Illinois. Data last updated August 6, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Illinois. Data last updated August 6, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 8/3. 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 8/156:05 pm -
Nonstop2h 42m
Thu 9/177:25 am -
Nonstop2h 24m
Deal found 8/3![Frontier logo]()
$196
This Frontier deal was found by Cheapflights users on 8/4. 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 8/156:05 pm -
Nonstop2h 42m
Fri 9/117:25 am -
Nonstop2h 24m
Deal found 8/4![Frontier logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 8/286:30 am -
1 stop11h 52m
Sun 8/306:17 pm -
1 stop11h 58m
Deal found 8/1![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 8/5. 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.
Sat 8/294:45 pm -
1 stop25h 37m
Mon 9/76:17 pm -
1 stop11h 58m
Deal found 8/5![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Mon 8/318:30 am -
1 stop9h 52m
Mon 9/76:17 pm -
1 stop11h 58m
Deal found 8/3![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 9/24:45 pm -
1 stop25h 37m
Mon 9/76:17 pm -
1 stop11h 58m
Deal found 8/1![Frontier logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 9/38:30 am -
1 stop9h 52m
Mon 9/76:17 pm -
1 stop11h 58m
Deal found 8/5![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 9/38:30 am -
1 stop9h 52m
Fri 9/46:17 pm -
1 stop11h 58m
Deal found 8/3![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 9/48:30 am -
1 stop9h 52m
Mon 9/76:17 pm -
1 stop11h 58m
Deal found 8/3![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 9/105:32 pm -
1 stop20h 38m
Mon 9/142:29 pm -
1 stop7h 49m
Deal found 8/3![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Mon 9/148:41 am -
1 stop5h 29m
Mon 9/212:29 pm -
1 stop15h 47m
Deal found 8/3![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 9/288:41 am -
1 stop5h 29m
Mon 10/52:29 pm -
1 stop7h 49m
Deal found 8/2![Frontier logo]()
$140
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 August 6, 2026.
Search for one-way flight options from Philadelphia to Illinois. Find affordable one-way fares based on user searches. Data last updated August 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 8/318:30 am -
1 stop9h 52m
Deal found 8/2![Frontier logo]()
$66
This Kiwi.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/24:45 pm -
1 stop25h 37m
Deal found 8/5![Frontier logo]()
$71
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 9/288:41 am -
1 stop5h 29m
Deal found 8/2![Frontier logo]()
$74
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Mon 10/58:41 am -
1 stop5h 29m
Deal found 8/3![Frontier logo]()
$75
This Kiwi.com deal was found by Cheapflights users on 8/5. 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.
Sat 9/54:45 pm -
1 stop25h 37m
Deal found 8/5![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 9/36:30 am -
1 stop11h 52m
Deal found 8/4![Frontier logo]()
$78
This Kiwi.com deal was found by Cheapflights users on 8/5. 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.
Mon 9/148:41 am -
1 stop5h 29m
Deal found 8/5![Frontier logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 11/412:43 pm -
1 stop21h 57m
Deal found 8/2![Frontier logo]()
$80
This Trip.com deal was found by Cheapflights users on 8/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:30 am -
1 stop11h 52m
Deal found 8/5![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 10/112:40 pm -
1 stop25h 30m
Deal found 8/2![Frontier logo]()
$83
This Frontier deal was found by Cheapflights users on 8/1. 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 9/1012:40 pm -
1 stop6h 43m
Deal found 8/1![Frontier logo]()
$100
This Frontier deal was found by Cheapflights users on 8/1. 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 9/1012:40 pm -
1 stop6h 06m
Deal found 8/1![Frontier logo]()
$100
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 August 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $140 (Kiwi.com) |
One-way from | $66 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $257 |
Good round-trip deal | $275 or less |
Good one-way deal | $161 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 August 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 Philadelphia - RFD Chicago Greater Rockford
PHLRFD
Philadelphia
Thu 10/1
5:45 pm-7:59 am
1 stop15h 14m
Chicago Greater Rockford
Sun 10/4
10:08 am-11:42 pm
1 stop12h 34m
$240
PhiladelphiaChicago
PHL Philadelphia - RFD Chicago Greater Rockford
PHLRFD
Philadelphia
Thu 10/29
7:20 pm-7:54 am
2 stops13h 34m
Chicago Greater Rockford
Mon 11/2
5:55 pm-12:32 pm
1 stop17h 37m
$257
PhiladelphiaMoline
PHL Philadelphia - MLI Moline Quad-City
PHLMLI
Philadelphia
Wed 11/18
10:32 am-4:22 pm
1 stop6h 50m
Moline Quad-City
Tue 11/24
5:13 pm-12:55 am
1 stop6h 42m
$271
PhiladelphiaChicago
PHL Philadelphia - RFD Chicago Greater Rockford
PHLRFD
Philadelphia
Wed 9/30
5:32 pm-8:40 am
2 stops16h 08m
Chicago Greater Rockford
Sun 10/4
10:08 am-11:42 pm
1 stop12h 34m
$271
PhiladelphiaSt. Louis
PHL Philadelphia - STL Lambert-St Louis
PHLSTL
Philadelphia
Sat 9/5
11:55 am-1:15 pm
Nonstop2h 20m
Lambert-St Louis
Sun 9/6
5:50 pm-9:00 pm
Nonstop2h 10m
$277
PhiladelphiaChicago
PHL Philadelphia - MDW Chicago Midway
PHLMDW
Philadelphia
Fri 9/11
2:05 pm-3:10 pm
Nonstop2h 05m
Chicago Midway
Mon 9/14
3:20 pm-10:05 pm
1 stop5h 45m
$278
PhiladelphiaChicago
PHL Philadelphia - ORD Chicago O'Hare Intl
PHLORD
Philadelphia
Mon 8/31
8:20 am-9:45 am
Nonstop2h 25m
Chicago O'Hare Intl
Wed 9/2
11:22 am-2:40 pm
Nonstop2h 18m
$279
PhiladelphiaChicago
PHL Philadelphia - MDW Chicago Midway
PHLMDW
Philadelphia
Tue 9/1
3:05 pm-4:05 pm
Nonstop2h 00m
Chicago Midway
Tue 9/8
5:55 pm-9:00 pm
Nonstop2h 05m
$279
PhiladelphiaChicago
PHL Philadelphia - MDW Chicago Midway
PHLMDW
Philadelphia
Wed 8/26
3:05 pm-4:05 pm
Nonstop2h 00m
Chicago Midway
Wed 9/2
8:30 am-11:35 am
Nonstop2h 05m
$279
Quickest round-trip
PhiladelphiaChicago
PHL Philadelphia - MDW Chicago Midway
PHLMDW
Philadelphia
Thu 10/1
3:20 pm-4:25 pm
Nonstop2h 05m
Chicago Midway
Mon 10/5
1:30 pm-4:25 pm
Nonstop1h 55m
$279
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Philadelphia to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Philadelphia with our price prediction graph.
PHL-STL
PHL-ORD
PHL-MDW
PHL-RFD
PHL-MLI
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Philadelphia to Illinois
PHL-USIL
PHL-STL
PHL-ORD
PHL-MDW
PHL-RFD
What is the cheapest month to book a flight from Philadelphia to Illinois?
Currently, November is the cheapest month in which you can book a flight from Philadelphia to Illinois (average of $233). Flying from Philadelphia to Illinois in June is currently the most expensive (average of $365). 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 August 6, 2026.
It’s optimal to fly from Philadelphia to Illinois in the afternoon. By choosing this option you can save up to 14% on the cost of your flight, compared to a flight in the morning.
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 August 6, 2026.
The most flights from PHL to USIL are scheduled on a Tuesday (54 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 on average).
How much does it cost to fly round-trip from Philadelphia to Illinois?
Airfare is below average for this route at the moment.
Philadelphia to Illinois flights typically cost between $211 and $365 in September.The cheapest round-trip price found within the last 5 days was $174 on Frontier (Sep 3-Sep 10).
How far ahead should I book a flight from Philadelphia to Illinois?
Booking 64 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 August 1, 2026.
Travelers seeking maximum savings on their Philadelphia to Illinois flight should consider departing on Friday afternoons 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 August 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.
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Related info for your journey
Find useful and relevant information for your journey from Philadelphia to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Philadelphia to Illinois
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Complete your trip
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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 August 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 August 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$74 | Average$180 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$133 | Average$266 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$174 | Average$346 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$174 | Average$389 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$175 | Average$366 | FlexibilityNo cancel fee | On-time63% |