$66+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ILG
Mar 6 — Mar 131
1 adult, Economy
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Find cheap flights from Illinois to Delaware 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 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 February 4, 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 February 4, 2026.
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.
Wed 3/410:44 am
ORD
- PHL
1 stop7h 07m
Spirit Airlines
Thu 3/58:06 am
PHL
- ORD
1 stop12h 05m
Spirit Airlines
Deal found 2/2![Spirit Airlines logo]()
$101
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 2/138:20 am
ORD
- PHL
Nonstop2h 09m
Frontier
Mon 2/169:47 pm
PHL
- ORD
Nonstop2h 36m
Frontier
Deal found 2/2![Frontier logo]()
$107
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/208:20 am
ORD
- PHL
Nonstop2h 09m
Frontier
Mon 3/27:35 am
PHL
- ORD
Nonstop2h 36m
Frontier
Deal found 2/2![Frontier logo]()
$108
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.
Mon 3/210:15 am
ORD
- PHL
Nonstop2h 09m
Multiple Airlines
Mon 3/95:26 pm
PHL
- ORD
1 stop7h 21m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$111
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/208:20 am
ORD
- PHL
Nonstop2h 09m
Multiple Airlines
Tue 3/38:06 am
PHL
- ORD
1 stop12h 05m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$112
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/138:20 am
ORD
- PHL
Nonstop2h 09m
Frontier
Fri 2/205:30 am
PHL
- ORD
Nonstop2h 36m
Frontier
Deal found 2/2![Frontier logo]()
$113
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.
Mon 2/165:22 pm
ORD
- PHL
Nonstop2h 09m
Frontier
Mon 3/27:35 am
PHL
- ORD
Nonstop2h 36m
Frontier
Deal found 2/3![Frontier logo]()
$114
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/273:40 pm
ORD
- PHL
1 stop18h 43m
Frontier
Mon 3/27:35 am
PHL
- ORD
Nonstop2h 36m
Frontier
Deal found 2/3![Frontier logo]()
$115
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 3/45:15 am
ORD
- PHL
1 stop13h 37m
Spirit Airlines
Wed 3/118:52 pm
PHL
- ORD
1 stop12h 33m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$117
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/208:20 am
ORD
- PHL
Nonstop2h 09m
Frontier
Fri 2/277:11 am
PHL
- ORD
Nonstop2h 36m
Frontier
Deal found 2/2![Frontier logo]()
$118
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/37:30 am
MDW
- PHL
1 stop8h 42m
Frontier
Wed 3/411:40 am
PHL
- MDW
1 stop8h 27m
Frontier
Deal found 2/3![Frontier logo]()
$128
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.
Tue 2/243:49 pm
STL
- PHL
1 stop19h 33m
Frontier
Wed 2/253:45 pm
PHL
- STL
1 stop7h 42m
Frontier
Deal found 1/31![Frontier logo]()
$133
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 February 4, 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 February 4, 2026.
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.
Tue 2/243:49 pm
STL
- PHL
1 stop19h 33m
Multiple Airlines
Tue 3/37:46 pm
PHL
- STL
1 stop27h 41m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$134
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.
Fri 2/208:20 pm
STL
- PHL
1 stop20h 36m
Frontier
Fri 2/277:12 pm
PHL
- STL
1 stop12h 39m
Frontier
Deal found 1/31![Frontier logo]()
$154
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 3/76:08 pm
ORD
- PHL
Nonstop2h 01m
United Airlines
Sat 3/149:55 am
PHL
- ORD
Nonstop2h 33m
United Airlines
Deal found 2/1![United Airlines logo]()
$179
This Southwest deal was found by Cheapflights users on 2/4. 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.
Sat 4/113:35 pm
MDW
- PHL
Nonstop2h 00m
Southwest
Tue 4/1411:35 am
PHL
- MDW
Nonstop2h 05m
Southwest
Deal found 2/4![Southwest logo]()
$228
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/285:40 pm
ORD
- PHL
1 stop4h 20m
Delta
Sat 4/412:26 pm
PHL
- ORD
1 stop4h 52m
Delta
Deal found 2/3![Delta logo]()
$237
This American Airlines deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/252:02 pm
MLI
- PHL
1 stop6h 52m
American Airlines
Tue 3/1012:21 pm
PHL
- MLI
1 stop7h 14m
American Airlines
Deal found 2/4![American Airlines logo]()
$260
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/134:54 pm
STL
- PHL
1 stop7h 31m
Frontier
Wed 4/158:25 pm
PHL
- STL
1 stop23h 47m
Frontier
Deal found 2/3![Frontier logo]()
$160
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:16 pm
STL
- PHL
1 stop8h 15m
Frontier
Wed 4/155:29 pm
PHL
- STL
1 stop6h 50m
Frontier
Deal found 2/2![Frontier logo]()
$160
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.
Tue 3/107:15 am
ORD
- PHL
Nonstop1h 59m
United Airlines
Sat 3/148:00 am
PHL
- ORD
Nonstop2h 33m
United Airlines
Deal found 2/1![United Airlines logo]()
$209
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.
Wed 3/119:15 pm
ORD
- PHL
Nonstop2h 01m
United Airlines
Sat 3/145:10 pm
PHL
- ORD
Nonstop2h 33m
United Airlines
Deal found 2/1![United Airlines logo]()
$209
This Travelocity deal was found by Cheapflights users on 2/4. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/178:13 pm
STL
- PHL
1 stop10h 57m
Frontier
Mon 4/2010:38 pm
PHL
- STL
1 stop25h 41m
Frontier
Deal found 2/4![Frontier logo]()
$195
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/247:10 am
ORD
- PHL
1 stop7h 36m
Delta
Tue 3/319:41 am
PHL
- ORD
1 stop4h 36m
Delta
Deal found 2/3![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.
Tue 3/243:35 pm
MDW
- PHL
1 stop6h 05m
Southwest
Tue 4/142:00 pm
PHL
- MDW
Nonstop2h 10m
Southwest
Deal found 2/1![Southwest logo]()
$238
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/257:10 am
ORD
- PHL
1 stop3h 31m
Delta
Wed 3/257:36 pm
PHL
- ORD
1 stop5h 18m
Delta
Deal found 2/3![Delta logo]()
$237
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/242:10 pm
ORD
- PHL
Nonstop2h 04m
United Airlines
Tue 3/3111:36 am
PHL
- ORD
Nonstop2h 28m
United Airlines
Deal found 2/3![United Airlines logo]()
$217
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 3/107:45 am
MDW
- PHL
Nonstop1h 50m
Southwest
Wed 3/1112:25 pm
PHL
- MDW
Nonstop2h 15m
Southwest
Deal found 2/1![Southwest logo]()
$239
This American Airlines deal was found by Cheapflights users on 2/4. 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 2/265:00 am
BMI
- PHL
1 stop3h 38m
American Airlines
Wed 3/410:30 am
PHL
- BMI
1 stop4h 56m
American Airlines
Deal found 2/4![American Airlines logo]()
$269
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/257:10 am
ORD
- PHL
1 stop3h 31m
Delta
Tue 3/316:00 am
PHL
- ORD
1 stop6h 35m
Delta
Deal found 2/3![Delta logo]()
$237
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/252:10 pm
ORD
- PHL
Nonstop2h 04m
United Airlines
Tue 3/3110:00 am
PHL
- ORD
Nonstop2h 28m
United Airlines
Deal found 2/3![United Airlines logo]()
$217
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/285:23 pm
PIA
- PHL
1 stop6h 31m
American Airlines
Thu 3/512:27 pm
PHL
- PIA
1 stop6h 58m
American Airlines
Deal found 1/31![American Airlines logo]()
$269
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.
Sat 3/282:40 pm
MDW
- PHL
Nonstop1h 50m
Southwest
Wed 4/14:55 pm
PHL
- MDW
1 stop8h 10m
Southwest
Deal found 2/2![Southwest logo]()
$247
This Kiwi.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/1312:16 pm
STL
- PHL
1 stop21h 43m
Frontier
Mon 3/165:05 am
PHL
- STL
1 stop9h 29m
Frontier
Deal found 2/4![Frontier logo]()
$232
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/189:15 pm
ORD
- PHL
Nonstop2h 01m
United Airlines
Tue 3/248:00 am
PHL
- ORD
Nonstop2h 33m
United Airlines
Deal found 2/2![United Airlines logo]()
$217
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/269:21 am
EVV
- PHL
1 stop9h 28m
Multiple Airlines
Sun 3/110:59 pm
PHL
- EVV
1 stop21h 07m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$326
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.
Wed 3/1112:47 pm
MDW
- PHL
1 stop7h 05m
Delta
Sat 3/149:41 am
PHL
- MDW
1 stop3h 48m
Delta
Deal found 2/1![Delta logo]()
$248
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/182:56 pm
BMI
- PHL
1 stop3h 52m
American Airlines
Sun 2/227:14 am
PHL
- BMI
1 stop4h 47m
American Airlines
Deal found 2/3![American Airlines logo]()
$279
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 4/119:15 am
MDW
- PHL
2 stops11h 20m
Southwest
Wed 4/159:10 am
PHL
- MDW
2 stops11h 20m
Southwest
Deal found 2/1![Southwest logo]()
$257
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.
Thu 3/128:02 am
STL
- PHL
1 stop7h 24m
Multiple Airlines
Wed 3/185:05 am
PHL
- STL
1 stop6h 32m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$343
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.
Wed 3/117:10 am
ORD
- PHL
1 stop3h 31m
Delta
Wed 3/117:36 pm
PHL
- ORD
1 stop5h 18m
Delta
Deal found 2/1![Delta logo]()
$259
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 4/810:15 am
MDW
- PHL
2 stops10h 45m
Southwest
Wed 4/159:10 am
PHL
- MDW
2 stops11h 20m
Southwest
Deal found 2/1![Southwest logo]()
$269
Last-minute flights from Illinois to DelawareDiscover last-minute flight deals from Illinois to Delaware. Data last updated February 4, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Delaware. Data last updated February 4, 2026 and is based on user searches.
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/138:20 am
ORD
- PHL
Nonstop2h 09m
Frontier
Mon 2/169:47 pm
PHL
- ORD
Nonstop2h 36m
Frontier
Deal found 1/31![Frontier logo]()
$107
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.
Mon 2/165:22 pm
ORD
- PHL
Nonstop2h 09m
Frontier
Mon 3/27:35 am
PHL
- ORD
Nonstop2h 36m
Frontier
Deal found 2/3![Frontier logo]()
$114
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/208:20 am
ORD
- PHL
Nonstop2h 09m
Multiple Airlines
Tue 3/38:06 am
PHL
- ORD
1 stop12h 05m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$112
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/208:20 am
ORD
- PHL
Nonstop2h 09m
Frontier
Fri 2/277:11 am
PHL
- ORD
Nonstop2h 36m
Frontier
Deal found 2/2![Frontier logo]()
$118
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.
Tue 2/243:49 pm
STL
- PHL
1 stop19h 33m
Frontier
Wed 2/253:45 pm
PHL
- STL
1 stop7h 42m
Frontier
Deal found 1/31![Frontier logo]()
$133
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.
Tue 2/243:49 pm
STL
- PHL
1 stop19h 33m
Multiple Airlines
Tue 3/37:46 pm
PHL
- STL
1 stop27h 41m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$134
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/273:40 pm
ORD
- PHL
1 stop18h 43m
Frontier
Mon 3/27:35 am
PHL
- ORD
Nonstop2h 36m
Frontier
Deal found 2/3![Frontier logo]()
$115
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/210:15 am
ORD
- PHL
Nonstop2h 09m
Multiple Airlines
Mon 3/95:26 pm
PHL
- ORD
1 stop7h 21m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$111
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.
Mon 3/210:15 am
ORD
- PHL
Nonstop2h 09m
Frontier
Wed 3/411:40 am
PHL
- ORD
1 stop6h 12m
Frontier
Deal found 2/1![Frontier logo]()
$113
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/37:30 am
MDW
- PHL
1 stop8h 42m
Frontier
Wed 3/411:40 am
PHL
- MDW
1 stop8h 27m
Frontier
Deal found 2/3![Frontier logo]()
$128
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.
Wed 3/410:44 am
ORD
- PHL
1 stop7h 07m
Spirit Airlines
Thu 3/58:06 am
PHL
- ORD
1 stop12h 05m
Spirit Airlines
Deal found 2/2![Spirit Airlines logo]()
$101
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 3/55:15 am
ORD
- PHL
1 stop13h 37m
Spirit Airlines
Sat 3/76:00 am
PHL
- ORD
1 stop14h 11m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$117
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 February 4, 2026.
Search for one-way flight options from Illinois to Delaware. Find affordable one-way fares based on user searches. Data last updated February 4, 2026.
This Trip.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/33:49 pm
STL
- PHL
1 stop21h 51m
Frontier
Deal found 2/4![Frontier logo]()
$66
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.
Tue 3/37:30 am
MDW
- PHL
1 stop8h 42m
Frontier
Deal found 2/3![Frontier logo]()
$70
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.
Sat 2/289:30 am
ORD
- PHL
1 stop13h 47m
Frontier
Deal found 2/1![Frontier logo]()
$70
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/283:49 pm
STL
- PHL
1 stop14h 43m
Frontier
Deal found 1/31![Frontier logo]()
$70
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/273:40 pm
ORD
- PHL
1 stop18h 43m
Frontier
Deal found 2/3![Frontier logo]()
$71
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.
Mon 3/23:49 pm
STL
- PHL
1 stop21h 55m
Frontier
Deal found 1/31![Frontier logo]()
$71
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 2/246:10 am
MDW
- PHL
1 stop10h 02m
Frontier
Deal found 2/2![Frontier logo]()
$72
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.
Wed 4/18:10 am
ORD
- PHL
1 stop14h 46m
Frontier
Deal found 2/2![Frontier logo]()
$72
This Trip.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/92:41 pm
MDW
- PHL
1 stop9h 11m
Frontier
Deal found 2/4![Frontier logo]()
$73
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/186:10 pm
ORD
- PHL
1 stop13h 29m
Spirit Airlines
Deal found 2/3![Spirit Airlines logo]()
$73
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.
Thu 2/265:16 pm
MDW
- PHL
1 stop6h 45m
Frontier
Deal found 2/1![Frontier logo]()
$74
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/136:10 pm
ORD
- PHL
1 stop13h 29m
Spirit Airlines
Deal found 2/1![Spirit Airlines logo]()
$74
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 February 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $101 (Expedia) |
One-way from | $66 (Trip.com) |
Popular in | March |
Cheapest in | October |
Average price | $321 |
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 February 4, 2026.
Use the filters below to find and compare flights from Illinois to Delaware that are best for you.
Fly from
Illinois
Fly to
Delaware
Route
Depart
Return
Price
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Tue 2/24
3:49 pm-12:22 pm
1 stop19h 33m
Philadelphia
Tue 3/3
7:46 pm-10:27 pm
1 stop27h 41m
$134
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Fri 2/20
8:20 pm-5:56 pm
1 stop20h 36m
Philadelphia
Fri 2/27
7:12 pm-6:51 am
1 stop12h 39m
$154
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Mon 4/13
4:54 pm-1:25 am
1 stop7h 31m
Philadelphia
Wed 4/15
8:25 pm-7:12 pm
1 stop23h 47m
$160
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Wed 4/8
8:16 pm-5:31 am
1 stop8h 15m
Philadelphia
Wed 4/15
5:29 pm-11:19 pm
1 stop6h 50m
$160
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Sat 3/7
6:08 pm-9:09 pm
Nonstop2h 01m
Philadelphia
Sat 3/14
9:55 am-11:28 am
Nonstop2h 33m
$179
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Fri 4/17
8:13 pm-8:10 am
1 stop10h 57m
Philadelphia
Mon 4/20
10:38 pm-11:19 pm
1 stop25h 41m
$195
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Tue 3/10
7:15 am-10:14 am
Nonstop1h 59m
Philadelphia
Sat 3/14
8:00 am-9:33 am
Nonstop2h 33m
$209
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Wed 3/11
9:15 pm-12:16 am
Nonstop2h 01m
Philadelphia
Sat 3/14
5:10 pm-6:43 pm
Nonstop2h 33m
$209
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Tue 3/24
2:10 pm-5:14 pm
Nonstop2h 04m
Philadelphia
Tue 3/31
11:36 am-1:04 pm
Nonstop2h 28m
$217
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Wed 3/25
2:10 pm-5:14 pm
Nonstop2h 04m
Philadelphia
Tue 3/31
10:00 am-11:28 am
Nonstop2h 28m
$217
Showing 1-10 of 60 results
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
MDW-PHL
STL-PHL
BMI-PHL
EVV-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
MDW-PHL
STL-PHL
BMI-PHL
No data available for this route at this time. Please check back soon.
Related info for your journey
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