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Delaware

$53+ 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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ILG
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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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 July 3, 2025.

Round-trip from

$147
(Expedia)

One-way from

$53
(Priceline)

Popular in

March

Cheapest in

August

Average price

$177
From Illinois to Delaware
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One-way flight from Illinois to Delaware
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Highest demand for flights based on searches. 29% potential increase in price ($95 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 3, 2025.

This Expedia deal was found by Cheapflights users on 7/1. 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 8/142:30 pmSTL - PHL
1 stop5h 19mSpirit Airlines
Sun 8/177:00 amPHL - STL
1 stop7h 32mSpirit Airlines
Deal found 7/1$147
This FlightHub deal was found by Cheapflights users on 7/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/18:27 pmORD - PHL
Nonstop2h 26mMultiple Airlines
Sun 8/39:12 pmPHL - ORD
1 stop10h 52mMultiple Airlines
Deal found 7/2$156
This FlightHub deal was found by Cheapflights users on 7/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/256:40 pmMDW - PHL
Nonstop2h 05mFrontier
Sat 7/265:30 amPHL - MDW
1 stop18h 05mFrontier
Deal found 7/2$157
This Priceline deal was found by Cheapflights users on 7/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/188:27 pmORD - PHL
Nonstop2h 26mFrontier
Thu 7/248:39 pmPHL - ORD
Nonstop2h 36mFrontier
Deal found 7/2$157
This Southwest deal was found by Cheapflights users on 7/2. 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 8/26:30 amMDW - PHL
Nonstop1h 55mSouthwest
Sun 8/245:30 amPHL - MDW
Nonstop2h 00mSouthwest
Deal found 7/2$159
This United Airlines deal was found by Cheapflights users on 7/3. 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.
Sat 8/29:23 pmORD - PHL
Nonstop2h 07mUnited Airlines
Sun 8/246:30 amPHL - ORD
Nonstop2h 22mUnited Airlines
Deal found 7/3$159
This FlightHub deal was found by Cheapflights users on 6/30. 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.
Mon 8/410:47 amSTL - PHL
1 stop10h 39mMultiple Airlines
Wed 8/66:54 pmPHL - STL
1 stop19h 40mMultiple Airlines
Deal found 6/30$161
This Priceline deal was found by Cheapflights users on 6/30. 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 7/145:40 pmSTL - PHL
1 stop6h 29mFrontier
Wed 7/165:30 pmPHL - STL
1 stop7h 17mFrontier
Deal found 6/30$168
This American Airlines deal was found by Cheapflights users on 7/3. 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.
Fri 8/18:41 pmORD - PHL
Nonstop2h 24mAmerican Airlines
Tue 9/302:15 pmPHL - ORD
Nonstop2h 28mAmerican Airlines
Deal found 7/3$171
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/218:09 amORD - PHL
1 stop9h 10mSpirit Airlines
Sat 8/29:12 pmPHL - ORD
1 stop10h 52mSpirit Airlines
Deal found 7/1$175
This Delta deal was found by Cheapflights users on 7/1. 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.
Tue 10/211:00 pmMDW - PHL
1 stop5h 23mDelta
Tue 10/281:00 pmPHL - MDW
1 stop6h 36mDelta
Deal found 7/1$197
This Delta deal was found by Cheapflights users on 7/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/161:30 pmORD - PHL
1 stop5h 24mDelta
Sat 8/236:00 amPHL - ORD
1 stop7h 04mDelta
Deal found 7/2$197

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 July 3, 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 8/14

2:30 pm-8:49 pm

1 stop5h 19m

Philadelphia

Sun 8/17

7:00 am-1:32 pm

1 stop7h 32m

$147

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Fri 8/1

8:27 pm-11:53 pm

Nonstop2h 26m

Philadelphia

Sun 8/3

9:12 pm-7:04 am

1 stop10h 52m

$156

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Fri 7/25

6:40 pm-9:45 pm

Nonstop2h 05m

Philadelphia

Sun 7/27

5:30 am-1:47 pm

1 stop9h 17m

$157

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Fri 7/18

8:27 pm-11:53 pm

Nonstop2h 26m

Philadelphia

Thu 7/24

8:39 pm-10:15 pm

Nonstop2h 36m

$157

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Sat 8/2

6:30 am-9:25 am

Nonstop1h 55m

Philadelphia

Wed 8/6

6:50 pm-10:25 pm

1 stop4h 35m

$159

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Sat 8/2

9:23 pm-12:30 am

Nonstop2h 07m

Philadelphia

Sun 8/24

6:30 am-7:52 am

Nonstop2h 22m

$159

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Mon 8/4

10:47 am-10:26 pm

1 stop10h 39m

Philadelphia

Wed 8/6

6:54 pm-1:34 pm

1 stop19h 40m

$161

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Mon 7/14

5:40 pm-1:09 am

1 stop6h 29m

Philadelphia

Wed 7/16

5:30 pm-11:47 pm

1 stop7h 17m

$168

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Sun 8/10

6:55 am-10:03 am

Nonstop2h 08m

Philadelphia

Sat 8/16

2:18 pm-3:45 pm

Nonstop2h 27m

$169

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Mon 7/21

8:09 am-6:19 pm

1 stop9h 10m

Philadelphia

Sat 8/2

9:12 pm-7:04 am

1 stop10h 52m

$175

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 45 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 July 3, 2025.
See what other customers who have flown with Southwest, Delta, and United 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.
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,982 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,861 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
JetBlue
7.3
Good
2,916 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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.

  • 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 $53. Spirit Airlines flights start at $55 while deals on American Airlines start at $79 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$181Average$181FlexibilityNo cancel feeOn-time71%

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