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Delaware

$76+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ILG
Mar 22 — Mar 291
Sun 3/22
Sun 3/29
1 adult, Economy
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Cheap flight deals from Illinois to Delaware

Cheapest flights from Illinois to Delaware
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 20, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/15. 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.
Sat 4/181:27 pm
ORD
-
PHL
1 stop8h 43m
Frontier
Thu 4/306:34 pm
PHL
-
ORD
Nonstop2h 34m
Frontier
Deal found 2/15$112
This Frontier deal was found by Cheapflights users on 2/16. 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.
Thu 4/162:20 pm
ORD
-
PHL
Nonstop2h 14m
Frontier
Mon 4/205:05 am
PHL
-
ORD
1 stop6h 39m
Frontier
Deal found 2/16$113
This Super.com deal was found by Cheapflights users on 2/16. 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.
Thu 4/302:20 pm
ORD
-
PHL
Nonstop2h 14m
Frontier
Sun 5/36:34 pm
PHL
-
ORD
Nonstop2h 34m
Frontier
Deal found 2/16$115
This Super.com deal was found by Cheapflights users on 2/18. 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 4/272:20 pm
ORD
-
PHL
Nonstop2h 14m
Frontier
Mon 5/46:34 pm
PHL
-
ORD
Nonstop2h 34m
Frontier
Deal found 2/18$116
This Kiwi.com deal was found by Cheapflights users on 2/15. 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.
Sun 4/192:20 pm
ORD
-
PHL
Nonstop2h 14m
Frontier
Thu 4/306:34 pm
PHL
-
ORD
Nonstop2h 34m
Frontier
Deal found 2/15$120
This Frontier deal was found by Cheapflights users on 2/19. 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.
Fri 5/82:20 pm
ORD
-
PHL
Nonstop2h 14m
Frontier
Mon 5/116:34 pm
PHL
-
ORD
Nonstop2h 34m
Frontier
Deal found 2/19$122
This Super.com deal was found by Cheapflights users on 2/19. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/12:20 pm
ORD
-
PHL
Nonstop2h 14m
Frontier
Sun 5/36:29 pm
PHL
-
ORD
Nonstop2h 34m
Frontier
Deal found 2/19$123
This Kiwi.com deal was found by Cheapflights users on 2/18. 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.
Sat 5/21:27 pm
ORD
-
PHL
1 stop9h 32m
Frontier
Sun 5/36:34 pm
PHL
-
ORD
Nonstop2h 34m
Frontier
Deal found 2/18$126
This Southwest deal was found by Cheapflights users on 2/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/187:40 am
MDW
-
PHL
Nonstop1h 55m
Southwest
Sat 4/253:45 pm
PHL
-
MDW
Nonstop2h 15m
Southwest
Deal found 2/16$147
This Frontier deal was found by Cheapflights users on 2/16. 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.
Fri 4/242:20 pm
MDW
-
PHL
1 stop9h 34m
Frontier
Sat 4/259:17 am
PHL
-
MDW
1 stop11h 14m
Frontier
Deal found 2/16$160
This Frontier deal was found by Cheapflights users on 2/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/168:13 pm
STL
-
PHL
1 stop10h 57m
Frontier
Tue 5/195:29 pm
PHL
-
STL
1 stop6h 50m
Frontier
Deal found 2/17$160
This Frontier deal was found by Cheapflights users on 2/19. 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 4/162:15 pm
MDW
-
PHL
1 stop9h 39m
Frontier
Tue 4/2111:02 am
PHL
-
MDW
1 stop9h 29m
Frontier
Deal found 2/19$161

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 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$112
(Kiwi.com)

One-way from

$76
(Mytrip)

Popular in

March

Cheapest in

October

Average price

$345
Provider with most accurate pricing for Chicago (CHI)-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Philadelphia flights.
Search Deals
From Illinois to Delaware
Search Deals
One-way flight from Illinois to Delaware
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 20, 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

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Sat 4/18

2:20 pm-5:32 pm

Nonstop2h 12m

Philadelphia

Thu 4/30

8:20 pm-9:48 pm

Nonstop2h 28m

$140

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Fri 5/8

3:25 pm-6:25 pm

Nonstop2h 00m

Philadelphia

Sun 5/10

7:05 pm-8:25 pm

Nonstop2h 20m

$177

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Tue 5/12

7:55 am-10:50 am

Nonstop1h 55m

Philadelphia

Tue 5/12

5:45 pm-6:55 pm

Nonstop2h 10m

$177

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Wed 5/13

7:15 am-10:29 am

Nonstop2h 14m

Philadelphia

Wed 5/13

6:34 pm-8:02 pm

Nonstop2h 28m

$177

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Fri 4/24

6:45 pm-9:45 pm

Nonstop2h 00m

Philadelphia

Mon 4/27

2:15 pm-3:25 pm

Nonstop2h 10m

$177

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Sat 5/16

11:05 am-2:16 pm

Nonstop2h 11m

Philadelphia

Wed 5/20

11:32 am-1:01 pm

Nonstop2h 29m

$177

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Sun 4/19

7:15 am-10:28 am

Nonstop2h 13m

Philadelphia

Wed 4/22

1:27 pm-2:55 pm

Nonstop2h 28m

$177

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Fri 4/24

7:15 am-10:28 am

Nonstop2h 13m

Philadelphia

Sun 4/26

6:04 am-7:32 am

Nonstop2h 28m

$177

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Sat 4/18

6:20 pm-9:32 pm

Nonstop2h 12m

Philadelphia

Sun 4/19

6:04 am-7:32 am

Nonstop2h 28m

$177

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Fri 5/8

9:39 pm-12:45 am

Nonstop2h 06m

Philadelphia

Sun 5/17

8:20 pm-9:49 pm

Nonstop2h 29m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/15

Showing 1-10 of 60 results
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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.
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
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Delaware. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Delaware?

    A quick flight from Illinois to Delaware can take about 2h. United Airlines provides one of the quickest options available for as low as $177. The distance between Illinois and Delaware is about 666 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Illinois to Delaware that include hotel bookings?

    Yes. In addition to deals on Illinois to Delaware flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Delaware?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Delaware.

  • Can I find deals for business class flights from Illinois to Delaware?

    Yes. Cheapflights offers flight deals from Illinois to Delaware by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Illinois to Delaware

See prices for flight routes from nearby airports that may be better suited for you.
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