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Delaware

$58+ 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ILG
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
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 December 18, 2025.

This Frontier deal was found by Cheapflights users on 12/17. 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.
Wed 12/242:15 pmORD - PHL
Nonstop2h 15mFrontier
Wed 12/312:25 pmPHL - ORD
1 stop8h 59mFrontier
Deal found 12/17$121
This Frontier deal was found by Cheapflights users on 12/17. 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.
Fri 12/265:15 amORD - PHL
Nonstop2h 15mFrontier
Wed 12/316:36 pmPHL - ORD
Nonstop2h 30mFrontier
Deal found 12/17$133
This Frontier deal was found by Cheapflights users on 12/16. 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 12/255:25 amORD - PHL
1 stop10h 31mFrontier
Wed 12/316:36 pmPHL - ORD
Nonstop2h 30mFrontier
Deal found 12/16$145
This Frontier deal was found by Cheapflights users on 12/16. 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.
Wed 12/312:15 pmORD - PHL
Nonstop2h 15mFrontier
Thu 1/812:42 pmPHL - ORD
Nonstop2h 40mFrontier
Deal found 12/16$154
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Tue 12/306:50 amORD - PHL
1 stop14h 21mMultiple Airlines
Wed 1/78:00 amPHL - ORD
1 stop25h 18mMultiple Airlines
Deal found 12/16$157
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Tue 12/306:50 amORD - PHL
1 stop14h 21mFrontier
Thu 1/812:42 pmPHL - ORD
Nonstop2h 40mFrontier
Deal found 12/16$159
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Wed 12/312:15 pmORD - PHL
Nonstop2h 15mMultiple Airlines
Wed 1/78:00 amPHL - ORD
1 stop25h 18mMultiple Airlines
Deal found 12/16$160
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Tue 12/306:50 amORD - PHL
1 stop14h 21mFrontier
Tue 1/67:11 pmPHL - ORD
1 stop28h 28mFrontier
Deal found 12/16$161
This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/242:16 pmMDW - PHL
1 stop8h 27mFrontier
Tue 12/3010:00 pmPHL - MDW
1 stop24h 58mFrontier
Deal found 12/16$163
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Wed 12/312:15 pmORD - PHL
Nonstop2h 15mFrontier
Tue 1/67:11 pmPHL - ORD
1 stop28h 28mFrontier
Deal found 12/16$164
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Tue 12/306:50 amORD - PHL
1 stop14h 21mMultiple Airlines
Thu 1/86:11 pmPHL - ORD
1 stop18h 11mMultiple Airlines
Deal found 12/16$165
This American Airlines deal was found by Cheapflights users on 12/16. 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 12/316:38 pmORD - PHL
Nonstop2h 11mAmerican Airlines
Thu 1/17:10 amPHL - ORD
Nonstop2h 32mAmerican Airlines
Deal found 12/16$166

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 December 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$113
(Kiwi.com)

One-way from

$58
(Spirit)

Popular in

March

Cheapest in

October

Average price

$253
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. 17% potential increase in price ($59 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 18, 2025.
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

Wed 1/14

5:57 pm-8:47 am

2 stops13h 50m

Philadelphia

Sun 1/18

4:45 pm-6:25 pm

Nonstop2h 40m

$126

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Mon 1/12

5:11 pm-5:43 pm

1 stop23h 32m

Philadelphia

Thu 1/15

8:43 pm-7:54 am

1 stop12h 11m

$137

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 1/7

5:11 pm-8:37 am

1 stop14h 26m

Philadelphia

Wed 1/14

4:08 pm-10:34 pm

1 stop7h 26m

$139

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Wed 1/14

11:20 am-2:31 pm

Nonstop2h 11m

Philadelphia

Sun 1/18

6:30 am-7:59 am

Nonstop2h 29m

$139

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Sat 2/7

2:30 pm-5:34 pm

Nonstop2h 04m

Philadelphia

Tue 2/10

5:00 pm-6:30 pm

Nonstop2h 30m

$139

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Wed 1/14

10:00 am-12:55 pm

Nonstop1h 55m

Philadelphia

Sun 1/18

5:40 am-7:00 am

Nonstop2h 20m

$149

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Sat 1/31

2:30 pm-5:34 pm

Nonstop2h 04m

Philadelphia

Mon 2/2

10:10 am-11:38 am

Nonstop2h 28m

$158

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Tue 1/6

6:20 pm-9:36 pm

Nonstop2h 16m

Philadelphia

Sat 1/10

5:00 pm-6:30 pm

Nonstop2h 30m

$159

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Thu 1/22

5:42 pm-9:59 am

1 stop15h 17m

Philadelphia

Mon 1/26

3:54 pm-11:33 pm

1 stop8h 39m

$169

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Wed 12/31

6:08 pm-11:17 pm

1 stop4h 09m

Philadelphia

Thu 1/1

6:00 am-8:49 am

1 stop3h 49m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

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.

Reviews of airlines servicing Delaware

Get insights into the airlines that provide service to Delaware. 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 Delaware. Reviews last updated December 18, 2025.
See what other customers who have flown with American Airlines from Illinois to Delaware have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,055 reviews

Boarding

7.5

Entertainment

6.9

Food

6.5

Crew

8.0

Comfort

7.2

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit
American Airlines
7.2
Good
11,055 reviews
American Airlines
7.2
Good
11,055 reviews

Boarding

7.5

Entertainment

6.9

Food

6.5

Crew

8.0

Comfort

7.2

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit

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 1h 55m. Frontier provides one of the quickest options available for as low as $149. The distance between Illinois and Delaware is about 666 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Illinois to Delaware one-way?

    To fly one-way, consider booking your trip with Qatar Airways, which is currently one of the cheapest options available, starting at $389. Etihad Airways flights start at $395 while deals on Turkish Airlines start at $412 one-way.

  • 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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Top airline flying from Illinois to Delaware

Discover the top airline that operate flights from Illinois to Delaware. 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$181Average$181FlexibilityNo cancel feeOn-time71%

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