$81+ Cheap flights from Illinois to Delaware
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ILG
Jun 19 — Jun 261
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to Delaware with Cheapflights
1. Tell us where you want to go
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Cheapest flights from Illinois to DelawareExplore the most affordable flight options available from Illinois to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 20, 2026.
Explore the most affordable flight options available from Illinois to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 7/221:50 pm
ORD
- PHL
1 stop7h 38m
Frontier
Sat 7/256:05 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 5/19![Frontier logo]()
$187
This Trip.com deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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.
Sat 6/278:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Mon 6/297:00 am
PHL
- ORD
1 stop18h 48m
Frontier
Deal found 5/19![Frontier logo]()
$188
This Frontier deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/217:52 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Sun 5/245:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Deal found 5/19![Frontier logo]()
$190
This Frontier deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/44:09 pm
STL
- PHL
1 stop7h 28m
Frontier
Tue 8/2512:42 pm
PHL
- STL
1 stop7h 41m
Frontier
Deal found 5/16![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/258:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Sat 6/275:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Deal found 5/16![Frontier logo]()
$191
This Super.com deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” 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 6/268:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Mon 6/295:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Deal found 5/17![Frontier logo]()
$192
This Expedia deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” 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 7/98:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Tue 7/148:30 am
PHL
- ORD
1 stop12h 23m
Frontier
Deal found 5/17![Frontier logo]()
$193
This Kiwi.com deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/308:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Sun 8/25:18 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 5/18![Frontier logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 8/88:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Tue 8/116:00 am
PHL
- ORD
1 stop7h 25m
Frontier
Deal found 5/16![Frontier logo]()
$196
This Trip.com deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” 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.
Wed 7/221:50 pm
ORD
- PHL
1 stop7h 38m
Frontier
Mon 7/275:18 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 5/17![Frontier logo]()
$197
This Frontier deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 7/167:05 am
ORD
- PHL
1 stop11h 15m
Frontier
Mon 7/205:18 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 5/18![Frontier logo]()
$198
This Booking.com deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” 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 6/118:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Sat 6/137:00 am
PHL
- ORD
1 stop18h 48m
Frontier
Deal found 5/17![Frontier logo]()
$199
Best flights from Illinois to DelawareDiscover carefully curated flight deals from Illinois to Delaware that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 20, 2026.
Discover carefully curated flight deals from Illinois to Delaware that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 20, 2026.
This United Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/189:45 pm
ORD
- PHL
Nonstop2h 12m
United Airlines
Tue 7/217:00 pm
PHL
- ORD
Nonstop2h 33m
United Airlines
Deal found 5/19![United Airlines logo]()
$247
This Southwest deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 7/185:55 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Tue 7/216:10 pm
PHL
- MDW
1 stop6h 55m
Southwest
Deal found 5/19![Southwest logo]()
$257
This Delta deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 7/311:08 am
MLI
- PHL
1 stop6h 29m
Delta
Wed 7/86:25 am
PHL
- MLI
1 stop4h 57m
Delta
Deal found 5/16![Delta logo]()
$261
This American Airlines deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/156:50 pm
MLI
- PHL
1 stop5h 09m
American Airlines
Thu 7/235:15 am
PHL
- MLI
1 stop7h 08m
American Airlines
Deal found 5/16![American Airlines logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/188:05 am
ORD
- SBY
1 stop10h 21m
Multiple Airlines
Sat 7/258:06 pm
SBY
- ORD
2 stops36h 47m
Multiple Airlines
Deal found 5/19![Multiple Airlines logo]()
$363
This Priceline deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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.
Wed 5/278:08 pm
STL
- PHL
1 stop8h 29m
Frontier
Sat 5/305:34 pm
PHL
- STL
1 stop7h 23m
Frontier
Deal found 5/19![Frontier logo]()
$370
This Delta deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 7/2211:05 am
MDW
- PHL
1 stop5h 07m
Delta
Tue 7/286:25 am
PHL
- MDW
1 stop4h 40m
Delta
Deal found 5/19![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” 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 5/272:40 pm
ORD
- PHL
1 stop6h 20m
Southwest
Fri 5/295:40 am
PHL
- ORD
1 stop10h 20m
Southwest
Deal found 5/15![Southwest logo]()
$267
This United Airlines deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” 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.
Mon 7/139:45 pm
ORD
- PHL
Nonstop2h 12m
United Airlines
Wed 7/151:31 pm
PHL
- ORD
Nonstop2h 24m
United Airlines
Deal found 5/17![United Airlines logo]()
$295
This Southwest deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 6/307:10 pm
STL
- PHL
Nonstop2h 10m
Southwest
Wed 7/15:05 pm
PHL
- STL
Nonstop2h 35m
Southwest
Deal found 5/19![Southwest logo]()
$277
This Delta deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” 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 9/155:00 pm
MLI
- PHL
1 stop5h 01m
Delta
Mon 9/215:30 am
PHL
- MLI
1 stop5h 56m
Delta
Deal found 5/17![Delta logo]()
$285
This Southwest deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/89:10 am
MDW
- PHL
Nonstop2h 00m
Southwest
Sat 7/116:05 pm
PHL
- MDW
Nonstop2h 10m
Southwest
Deal found 5/17![Southwest logo]()
$279
This American Airlines deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3012:24 pm
PIA
- PHL
1 stop9h 29m
American Airlines
Mon 6/14:55 pm
PHL
- PIA
1 stop8h 03m
American Airlines
Deal found 5/16![American Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/225:56 am
MLI
- PHL
1 stop8h 07m
Delta
Sat 6/276:00 am
PHL
- MLI
1 stop5h 16m
Delta
Deal found 5/19![Delta logo]()
$295
This Kiwi.com deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” 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 7/68:33 am
EVV
- PHL
2 stops26h 49m
Multiple Airlines
Wed 7/156:33 pm
PHL
- EVV
1 stop13h 50m
Multiple Airlines
Deal found 5/17![Multiple Airlines logo]()
$369
This United Airlines deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” 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 5/3010:40 am
MLI
- PHL
1 stop6h 02m
United Airlines
Wed 6/37:00 pm
PHL
- MLI
1 stop5h 16m
United Airlines
Deal found 5/15![United Airlines logo]()
$339
This Southwest deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” 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 7/1111:15 am
MDW
- PHL
Nonstop1h 55m
Southwest
Mon 7/135:20 pm
PHL
- MDW
Nonstop2h 10m
Southwest
Deal found 5/17![Southwest logo]()
$295
This United Airlines deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” 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 8/268:10 am
MLI
- PHL
1 stop5h 30m
United Airlines
Sat 8/291:30 pm
PHL
- MLI
1 stop7h 01m
United Airlines
Deal found 5/17![United Airlines logo]()
$341
This American Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/115:48 pm
STL
- PHL
Nonstop2h 22m
American Airlines
Wed 7/159:00 am
PHL
- STL
Nonstop2h 35m
American Airlines
Deal found 5/19![American Airlines logo]()
$378
This Delta deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 8/612:46 pm
MDW
- PHL
1 stop4h 56m
Delta
Wed 8/128:10 am
PHL
- MDW
1 stop4h 41m
Delta
Deal found 5/16![Delta logo]()
$315
This Kiwi.com deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” 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 6/268:35 pm
EVV
- PHL
2 stops25h 54m
Multiple Airlines
Sun 7/59:16 pm
PHL
- EVV
1 stop11h 27m
Multiple Airlines
Deal found 5/15![Multiple Airlines logo]()
$386
This Southwest deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” 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 8/113:00 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Fri 8/1410:20 am
PHL
- MDW
Nonstop2h 05m
Southwest
Deal found 5/17![Southwest logo]()
$301
This United Airlines deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” 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 8/225:09 pm
MLI
- PHL
1 stop6h 50m
United Airlines
Wed 8/261:35 pm
PHL
- MLI
1 stop6h 56m
United Airlines
Deal found 5/15![United Airlines logo]()
$341
This American Airlines deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/184:35 pm
EVV
- PHL
1 stop6h 47m
American Airlines
Sun 7/1910:35 am
PHL
- EVV
1 stop6h 35m
American Airlines
Deal found 5/17![American Airlines logo]()
$379
This Delta deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 6/265:22 pm
ORD
- PHL
1 stop4h 55m
Delta
Fri 7/39:46 am
PHL
- ORD
1 stop4h 14m
Delta
Deal found 5/14![Delta logo]()
$321
This Southwest deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2911:25 am
MDW
- PHL
2 stops10h 25m
Southwest
Tue 8/41:55 pm
PHL
- MDW
1 stop6h 20m
Southwest
Deal found 5/18![Southwest logo]()
$304
This Delta deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 7/242:07 pm
ORD
- PHL
1 stop4h 18m
Delta
Tue 7/287:17 pm
PHL
- ORD
1 stop5h 36m
Delta
Deal found 5/19![Delta logo]()
$321
This United Airlines deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1011:25 am
STL
- PHL
1 stop5h 27m
United Airlines
Wed 6/178:05 am
PHL
- STL
1 stop5h 06m
United Airlines
Deal found 5/16![United Airlines logo]()
$377
This Southwest deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” 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 6/207:55 am
MDW
- PHL
Nonstop2h 05m
Southwest
Mon 7/611:20 am
PHL
- MDW
Nonstop2h 10m
Southwest
Deal found 5/15![Southwest logo]()
$327
This Delta deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 7/84:14 pm
BMI
- PHL
1 stop7h 43m
Delta
Mon 7/136:25 am
PHL
- BMI
1 stop5h 58m
Delta
Deal found 5/18![Delta logo]()
$329
Last-minute flights from Illinois to DelawareDiscover last-minute flight deals from Illinois to Delaware. Data last updated May 20, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Delaware. Data last updated May 20, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/217:52 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Sun 5/245:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Deal found 5/19![Frontier logo]()
$190
This Super.com deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 5/257:52 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Fri 5/295:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Deal found 5/18![Frontier logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” 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 6/17:52 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Sat 7/115:18 pm
PHL
- ORD
Nonstop2h 42m
Frontier
Deal found 5/17![Frontier logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 6/58:00 pm
ORD
- PHL
Nonstop2h 27m
Frontier
Mon 6/85:05 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Deal found 5/16![Frontier logo]()
$196
This FlightHub deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/68:00 pm
ORD
- PHL
Nonstop2h 27m
Frontier
Sun 6/75:06 pm
PHL
- ORD
Nonstop2h 38m
Frontier
Deal found 5/17![Frontier logo]()
$201
This Priceline deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” 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.
Sat 6/66:00 am
MDW
- PHL
1 stop5h 25m
Frontier
Mon 6/84:25 pm
PHL
- MDW
1 stop6h 37m
Frontier
Deal found 5/15![Frontier logo]()
$218
This Booking.com deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” 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 6/118:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Sat 6/137:00 am
PHL
- ORD
1 stop18h 48m
Frontier
Deal found 5/17![Frontier logo]()
$199
This CheapOair deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/138:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Mon 6/155:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Deal found 5/18![Frontier logo]()
$200
This Expedia deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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.
Mon 6/154:17 pm
STL
- PHL
1 stop15h 34m
Frontier
Tue 6/236:30 am
PHL
- STL
1 stop12h 00m
Frontier
Deal found 5/18![Frontier logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/258:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Sat 6/275:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Deal found 5/16![Frontier logo]()
$191
This Super.com deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” 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 6/268:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Mon 6/295:06 pm
PHL
- ORD
Nonstop2h 41m
Frontier
Deal found 5/17![Frontier logo]()
$192
This Trip.com deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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.
Sat 6/278:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Mon 6/297:00 am
PHL
- ORD
1 stop18h 48m
Frontier
Deal found 5/19![Frontier logo]()
$188
One-way flights from Illinois to DelawareSearch for one-way flight options from Illinois to Delaware. Find affordable one-way fares based on user searches. Data last updated May 20, 2026.
Search for one-way flight options from Illinois to Delaware. Find affordable one-way fares based on user searches. Data last updated May 20, 2026.
This Super.com deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” 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 7/98:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/18![Frontier logo]()
$81
This Super.com deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 7/138:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/16![Frontier logo]()
$83
This Super.com deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” 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 7/278:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/15![Frontier logo]()
$85
This Super.com deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” 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 6/298:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/15![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/118:00 pm
ORD
- PHL
Nonstop2h 32m
Frontier
Deal found 5/17![Frontier logo]()
$88
This Frontier deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/68:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/18![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 8/138:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/16![Frontier logo]()
$92
This Super.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 8/38:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/14![Frontier logo]()
$95
This Frontier deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/107:03 pm
STL
- PHL
1 stop10h 24m
Frontier
Deal found 5/18![Frontier logo]()
$95
This Frontier deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:03 pm
STL
- PHL
1 stop11h 24m
Frontier
Deal found 5/18![Frontier logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” 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 8/108:05 pm
ORD
- PHL
Nonstop2h 26m
Frontier
Deal found 5/17![Frontier logo]()
$98
This Super.com deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/306:31 pm
STL
- PHL
1 stop11h 48m
Frontier
Deal found 5/18![Frontier logo]()
$100
Find flight deals from Illinois to Delaware
Keep the following information in mind while searching for Illinois to Delaware flight deals. Data was last updated May 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $187 (Kiwi.com) |
One-way from | $81 (Super.com) |
Popular in | March |
Cheapest in | October |
Average price | $311 |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Delaware that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 20, 2026.
Use the filters below to find and compare flights from Illinois to Delaware that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Sat 7/18
9:45 pm-12:57 am
Nonstop2h 12m
Philadelphia
Tue 7/21
7:00 pm-8:33 pm
Nonstop2h 33m
$247
ChicagoPhiladelphia
MDW - PHL
MDWPHL
Chicago Midway
Sat 7/18
5:55 pm-8:55 pm
Nonstop2h 00m
Philadelphia
Tue 7/21
6:10 pm-12:05 am
1 stop6h 55m
$257
MolinePhiladelphia
MLI - PHL
MLIPHL
Moline Quad-City
Fri 7/3
11:08 am-6:37 pm
1 stop6h 29m
Philadelphia
Wed 7/8
6:25 am-10:22 am
1 stop4h 57m
$261
ChicagoPhiladelphia
MDW - PHL
MDWPHL
Chicago Midway
Wed 7/22
11:05 am-5:12 pm
1 stop5h 07m
Philadelphia
Tue 7/28
6:25 am-10:05 am
1 stop4h 40m
$267
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Wed 5/27
2:40 pm-10:00 pm
1 stop6h 20m
Philadelphia
Fri 5/29
5:40 am-3:00 pm
1 stop10h 20m
$267
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Tue 6/30
7:10 pm-10:20 pm
Nonstop2h 10m
Philadelphia
Wed 7/1
5:05 pm-6:40 pm
Nonstop2h 35m
$277
ChicagoPhiladelphia
MDW - PHL
MDWPHL
Chicago Midway
Wed 7/8
9:10 am-12:10 pm
Nonstop2h 00m
Philadelphia
Sat 7/11
6:05 pm-7:15 pm
Nonstop2h 10m
$279
MolinePhiladelphia
MLI - PHL
MLIPHL
Moline Quad-City
Tue 9/15
5:00 pm-11:01 pm
1 stop5h 01m
Philadelphia
Mon 9/21
5:30 am-10:26 am
1 stop5h 56m
$285
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Mon 7/13
9:45 pm-12:57 am
Nonstop2h 12m
Philadelphia
Wed 7/15
1:31 pm-2:55 pm
Nonstop2h 24m
$295
MolinePhiladelphia
MLI - PHL
MLIPHL
Moline Quad-City
Mon 6/22
5:56 am-3:03 pm
1 stop8h 07m
Philadelphia
Sat 6/27
6:00 am-10:16 am
1 stop5h 16m
$295
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to Delaware
Have a flexible travel schedule? Discover the best time to fly to Delaware from Illinois with our price prediction graph.
ORD-PHL
STL-PHL
MDW-PHL
ORD-SBY
MLI-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 Delaware
USIL-USDE
ORD-PHL
STL-PHL
MDW-PHL
ORD-SBY
No data available for this route at this time. Please check back soon.
Related info for your journey
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