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Delaware

$85+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ILG
אפר' 5 — אפר' 121
ש' 4/5
ש' 4/12
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 מרץ 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$166
(FlightHub)

One-way from

$85
(Mytrip)

Popular in

February

Cheapest in

August

Average price

$311
Provider with most accurate pricing for Chicago (CHI)-Philadelphia flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Philadelphia flights.
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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. 35% potential increase in price ($113 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in March 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 מרץ 31, 2025.

This FlightHub deal was found by Cheapflights users on 3/30. 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.
ו' 4/2512:15 pmMDW - PHL
Nonstop2h 00mFrontier
א' 4/276:00 amPHL - MDW
Nonstop2h 18mFrontier
Deal found 3/30$166
This Mytrip deal was found by Cheapflights users on 3/29. 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.
ג' 4/297:10 amORD - PHL
2 stops26h 48mSpirit Airlines
ש' 5/311:53 amPHL - ORD
1 stop12h 23mSpirit Airlines
Deal found 3/29$166
This FlightHub deal was found by Cheapflights users on 3/30. 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.
ג' 4/2911:47 amORD - PHL
1 stop6h 49mMultiple Airlines
ו' 5/25:53 pmPHL - ORD
Nonstop2h 25mMultiple Airlines
Deal found 3/30$167
This Southwest deal was found by Cheapflights users on 3/29. 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.
ג' 4/292:50 pmMDW - PHL
Nonstop1h 55mSouthwest
ש' 5/36:25 amPHL - MDW
Nonstop2h 10mSouthwest
Deal found 3/29$168
This American Airlines deal was found by Cheapflights users on 3/29. 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.
ג' 4/299:55 amORD - PHL
Nonstop2h 00mAmerican Airlines
ש' 5/39:17 pmPHL - ORD
Nonstop2h 30mAmerican Airlines
Deal found 3/29$168
This Frontier deal was found by Cheapflights users on 3/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ב' 5/1212:58 pmORD - PHL
Nonstop2h 08mFrontier
ו' 5/165:53 pmPHL - ORD
Nonstop2h 28mFrontier
Deal found 3/30$170
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ש' 5/109:00 amORD - PHL
Nonstop2h 08mUnited Airlines
ד' 5/146:30 amPHL - ORD
Nonstop2h 24mUnited Airlines
Deal found 3/30$179
This Delta deal was found by Cheapflights users on 3/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ד' 5/146:00 amMDW - PHL
1 stop7h 52mDelta
ד' 5/215:30 amPHL - MDW
1 stop7h 23mDelta
Deal found 3/30$199
This Delta deal was found by Cheapflights users on 3/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ד' 5/147:05 amORD - PHL
1 stop6h 47mDelta
ד' 5/2110:04 amPHL - ORD
1 stop3h 37mDelta
Deal found 3/30$199
This Mytrip deal was found by Cheapflights users on 3/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ב' 4/149:07 pmPIA - PHL
1 stop26h 02mMultiple Airlines
ו' 4/187:00 amPHL - PIA
1 stop8h 18mMultiple Airlines
Deal found 3/30$203
This Southwest deal was found by Cheapflights users on 3/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ו' 5/306:00 amORD - PHL
1 stop11h 10mSouthwest
ב' 6/29:30 amPHL - ORD
1 stop9h 25mSouthwest
Deal found 3/30$242
This Mytrip deal was found by Cheapflights users on 3/29. 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.
א' 4/206:10 pmSTL - PHL
2 stops28h 59mSpirit Airlines
ד' 4/307:05 pmPHL - STL
1 stop23h 10mSpirit Airlines
Deal found 3/29$332

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 מרץ 31, 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

MDW - PHL

MDWPHL

Chicago Midway

ו' 4/25

12:15 pm-3:15 pm

Nonstop2h 00m

Philadelphia

א' 4/27

6:00 am-7:18 am

Nonstop2h 18m

$166

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

ג' 4/29

7:10 am-10:58 am

2 stops26h 48m

Philadelphia

ש' 5/3

11:53 am-11:16 pm

1 stop12h 23m

$166

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

ג' 4/29

11:47 am-7:36 pm

1 stop6h 49m

Philadelphia

ו' 5/2

5:53 pm-7:18 pm

Nonstop2h 25m

$167

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

ג' 4/29

2:50 pm-5:45 pm

Nonstop1h 55m

Philadelphia

ש' 5/3

6:25 am-7:35 am

Nonstop2h 10m

$168

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

ג' 4/29

9:55 am-12:55 pm

Nonstop2h 00m

Philadelphia

ש' 5/3

9:17 pm-10:47 pm

Nonstop2h 30m

$168

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

ב' 5/12

12:58 pm-4:06 pm

Nonstop2h 08m

Philadelphia

ו' 5/16

5:53 pm-7:21 pm

Nonstop2h 28m

$170

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

ש' 5/10

9:00 am-12:08 pm

Nonstop2h 08m

Philadelphia

ד' 5/14

6:30 am-7:54 am

Nonstop2h 24m

$179

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

ד' 5/14

10:25 am-5:10 pm

1 stop5h 45m

Philadelphia

ד' 5/21

8:00 am-11:53 am

1 stop4h 53m

$199

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

ד' 5/14

7:05 am-2:52 pm

1 stop6h 47m

Philadelphia

ד' 5/21

10:04 am-12:41 pm

1 stop3h 37m

$199

PeoriaPhiladelphia

PIA - PHL

PIAPHL

Greater Peoria

ב' 4/14

9:07 pm-12:09 am

1 stop26h 02m

Philadelphia

ו' 4/18

7:00 am-2:18 pm

1 stop8h 18m

$203

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 58 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

Rainfall in Delaware by month

Plan your trip to Delaware by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Delaware ranges from 2.9 - 4.3 inches per month. July is typically the wettest month, when rainfall can reach 4.3 in. February is typically the driest time to visit Delaware when rainfall is around 2.9 in.

Temperature in Delaware by month

Plan your trip to Delaware by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Delaware, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 מרץ 31, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Illinois to Delaware. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,811 reviews

Boarding

8.2

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,811 reviews
Alaska Airlines
8.0
Very good
9,811 reviews

Boarding

8.2

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,275 reviews
Alaska Airlines
8.0
Very good
9,811 reviews

Boarding

8.2

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,899 reviews
Alaska Airlines
8.0
Very good
9,811 reviews

Boarding

8.2

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,614 reviews
Alaska Airlines
8.0
Very good
9,811 reviews

Boarding

8.2

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
JetBlue
7.3
Good
2,924 reviews
Alaska Airlines
8.0
Very good
9,811 reviews

Boarding

8.2

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 Spirit Airlines, which is currently one of the cheapest options available, starting at $85. Frontier flights start at $89 while deals on American Airlines start at $89 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 מרץ 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$181Average$181FlexibilityNo cancel feeOn-time71%
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