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Delaware

$48+ 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 12/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ILG
Dec 5 — Dec 121
Fri 12/5
Fri 12/12
1 adult, Economy
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Find 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 November 5, 2025.

This Frontier deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/93:30 pmSTL - PHL
1 stop8h 10mFrontier
Thu 12/1110:00 pmPHL - STL
1 stop11h 59mFrontier
Deal found 11/4$110
This Priceline deal was found by Cheapflights users on 11/4. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/38:00 amORD - PHL
1 stop7h 52mFrontier
Mon 12/86:00 amPHL - ORD
1 stop9h 05mFrontier
Deal found 11/4$110
This Priceline deal was found by Cheapflights users on 11/3. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/63:26 pmORD - PHL
1 stop6h 50mMultiple Airlines
Tue 12/912:20 pmPHL - ORD
1 stop7h 26mMultiple Airlines
Deal found 11/3$112
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/93:26 pmORD - PHL
1 stop6h 50mSpirit Airlines
Sat 12/134:00 pmPHL - ORD
1 stop9h 09mSpirit Airlines
Deal found 11/4$113
This Kiwi.com deal was found by Cheapflights users on 11/4. 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.
Sat 11/229:58 pmMDW - PHL
1 stop29h 47mFrontier
Mon 11/244:50 pmPHL - MDW
Nonstop2h 16mFrontier
Deal found 11/4$114
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1810:52 amORD - PHL
1 stop11h 34mSpirit Airlines
Wed 11/193:10 pmPHL - ORD
1 stop10h 17mSpirit Airlines
Deal found 11/4$114
This Mytrip deal was found by Cheapflights users on 11/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1711:24 amORD - PHL
1 stop6h 20mMultiple Airlines
Tue 11/183:10 pmPHL - ORD
1 stop10h 17mMultiple Airlines
Deal found 11/3$115
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 11/218:41 pmMDW - PHL
Nonstop1h 57mFrontier
Mon 11/244:50 pmPHL - MDW
Nonstop2h 16mFrontier
Deal found 11/3$117
This Frontier deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/235:30 amORD - PHL
Nonstop2h 07mFrontier
Sun 11/2310:45 amPHL - ORD
1 stop7h 54mFrontier
Deal found 11/4$117
This Priceline deal was found by Cheapflights users on 11/4. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/228:29 pmMDW - PHL
Nonstop1h 57mFrontier
Mon 12/13:25 pmPHL - MDW
1 stop9h 48mFrontier
Deal found 11/4$118
This Kiwi.com deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/126:05 pmORD - PHL
1 stop9h 44mFrontier
Mon 11/176:00 amPHL - ORD
Nonstop2h 26mFrontier
Deal found 11/5$118
This Priceline deal was found by Cheapflights users on 11/4. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/171:37 pmMDW - PHL
1 stop9h 42mFrontier
Thu 11/206:09 pmPHL - MDW
Nonstop2h 22mFrontier
Deal found 11/4$119

Cheap flight deals from Illinois to Delaware

Keep the following information in mind while searching for Illinois to Delaware flight deals. Data was last updated November 5, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$107
(Kiwi.com)

One-way from

$48
(Kiwi.com)

Popular in

March

Cheapest in

October

Average price

$227
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 ($57 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 November 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 November 5, 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

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Thu 12/4

3:30 pm-12:40 am

1 stop8h 10m

Philadelphia

Mon 12/8

10:00 pm-10:33 pm

1 stop25h 33m

$120

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Thu 11/20

3:14 pm-12:30 am

1 stop8h 16m

Philadelphia

Sun 11/23

5:45 am-2:29 pm

1 stop9h 44m

$127

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Tue 12/16

11:05 am-2:07 pm

Nonstop2h 02m

Philadelphia

Wed 12/31

5:00 pm-6:31 pm

Nonstop2h 31m

$139

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Sat 1/24

11:20 am-2:31 pm

Nonstop2h 11m

Philadelphia

Sat 1/31

10:10 am-11:38 am

Nonstop2h 28m

$139

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Thu 11/27

9:30 am-5:05 pm

1 stop6h 35m

Philadelphia

Wed 12/3

6:00 am-7:15 am

Nonstop2h 15m

$149

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Thu 11/13

11:07 am-6:44 pm

1 stop6h 37m

Philadelphia

Thu 12/4

5:30 am-11:07 am

1 stop6h 37m

$150

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Tue 12/2

8:10 am-11:05 am

Nonstop1h 55m

Philadelphia

Wed 12/3

6:00 am-7:15 am

Nonstop2h 15m

$159

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Wed 12/31

6:08 pm-11:17 pm

1 stop4h 09m

Philadelphia

Tue 1/6

6:00 am-8:54 am

1 stop3h 54m

$177

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Tue 2/24

6:00 am-1:24 pm

1 stop6h 24m

Philadelphia

Wed 2/25

6:23 pm-10:44 pm

1 stop5h 21m

$177

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Thu 2/5

1:40 pm-4:30 pm

Nonstop1h 50m

Philadelphia

Sun 2/8

5:40 am-7:00 am

Nonstop2h 20m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/3

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 November 5, 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
11,042 reviews

Entertainment

6.9

Boarding

7.5

Overall

7.2

Crew

8.0

Food

6.4

Comfort

7.2

Reviews

1 / 20
8.0
Excellent

Monica,Nov 2025

JAC - DFW

At least there was an option of entertainment on this flight.
American Airlines
7.2
Good
11,042 reviews
American Airlines
7.2
Good
11,042 reviews

Entertainment

6.9

Boarding

7.5

Overall

7.2

Crew

8.0

Food

6.4

Comfort

7.2

Reviews

1 / 20
8.0
Excellent

Monica,Nov 2025

JAC - DFW

At least there was an option of entertainment on this flight.

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 02m. Frontier provides one of the quickest options available for as low as $139. The distance between Illinois and Delaware is about 676 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 Frontier, which is currently one of the cheapest options available, starting at $55. Southwest flights start at $70 while deals on United Airlines start at $70 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 November 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$181Average$181FlexibilityNo cancel feeOn-time71%

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