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$61+ Cheap flights from Reagan-National (DCA) to Illinois

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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — ORD
Dec 11 — Dec 181
Thu 12/11
Thu 12/18
1 adult, Economy
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Find flight deals from Reagan-National to Illinois

Cheapest flights from Reagan-National to Illinois
Explore the most affordable flight options available from Reagan-National to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 11, 2025.

This Frontier deal was found by Cheapflights users on 11/10. 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.
Mon 12/82:00 pmDCA - ORD
1 stop11h 12mFrontier
Thu 12/117:00 amORD - DCA
1 stop13h 59mFrontier
Deal found 11/10$150
This Frontier deal was found by Cheapflights users on 11/10. 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 12/42:00 pmDCA - ORD
1 stop11h 12mFrontier
Thu 12/117:00 amORD - DCA
1 stop13h 59mFrontier
Deal found 11/10$170
This CheapOair deal was found by Cheapflights users on 11/10. 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.
Thu 12/42:00 pmDCA - ORD
1 stop11h 12mFrontier
Thu 12/187:00 amORD - DCA
1 stop29h 01mFrontier
Deal found 11/10$180
This CheapOair deal was found by Cheapflights users on 11/10. 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.
Mon 11/172:00 pmDCA - ORD
1 stop11h 15mFrontier
Tue 11/186:05 pmORD - DCA
1 stop17h 57mFrontier
Deal found 11/10$190
This Booking.com deal was found by Cheapflights users on 11/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/172:00 pmDCA - ORD
1 stop30h 38mFrontier
Thu 11/207:00 amORD - DCA
1 stop29h 03mFrontier
Deal found 11/10$192
This Priceline deal was found by Cheapflights users on 11/10. 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.
Tue 11/184:55 pmDCA - ORD
1 stop4h 57mJetBlue
Wed 11/196:45 amORD - DCA
1 stop6h 51mJetBlue
Deal found 11/10$195
This CheapOair deal was found by Cheapflights users on 11/10. 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 11/128:15 amDCA - MDW
1 stop28h 15mFrontier
Thu 1/89:07 pmMDW - DCA
1 stop23h 52mFrontier
Deal found 11/10$200
This Booking.com deal was found by Cheapflights users on 11/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/118:00 amDCA - MDW
1 stop28h 08mFrontier
Mon 12/1512:18 pmMDW - DCA
1 stop8h 41mFrontier
Deal found 11/9$202
This Priceline deal was found by Cheapflights users on 11/10. 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 12/52:00 pmDCA - ORD
1 stop11h 12mFrontier
Mon 12/87:00 amORD - DCA
1 stop8h 59mFrontier
Deal found 11/10$210
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 12/146:00 pmDCA - ORD
1 stop31h 12mFrontier
Sun 1/410:49 pmORD - DCA
2 stops37h 17mFrontier
Deal found 11/11$212
This CheapOair deal was found by Cheapflights users on 11/9. 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.
Sat 11/152:00 pmDCA - MDW
1 stop22h 30mFrontier
Mon 11/1712:30 pmMDW - DCA
1 stop27h 29mFrontier
Deal found 11/9$220
This Booking.com deal was found by Cheapflights users on 11/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/132:00 pmDCA - ORD
1 stop11h 15mFrontier
Tue 11/186:05 pmORD - DCA
1 stop17h 57mFrontier
Deal found 11/10$222

Cheap flight deals from Reagan-National to Illinois

Keep the following information in mind while searching for Reagan-National to Illinois flight deals. Data was last updated November 11, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$150
(Frontier)

One-way from

$61
(CheapOair)

Popular in

November

Cheapest in

September

Average price

$291

Good round-trip deal

$302 or less

Good one-way deal

$156 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Chicago (CHI) flights.
Search Deals
From Washington, D.C. Reagan-National to Illinois
Search Deals
One-way flight from Washington, D.C. Reagan-National to Illinois
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($12 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Reagan-National to Illinois.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Reagan-National to Illinois.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Reagan-National to Illinois 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 11, 2025.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Illinois that are best for you.

Fly from

Reagan-National

Fly to

Illinois

Route

Depart

Return

Price

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 5/7

6:30 am-2:20 pm

1 stop8h 50m

Chicago O'Hare Intl

Mon 5/11

3:15 pm-10:59 pm

1 stop6h 44m

$215

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Fri 1/30

1:00 pm-5:44 pm

1 stop5h 44m

Chicago O'Hare Intl

Sun 2/1

7:45 am-2:34 pm

1 stop5h 49m

$223

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Mon 12/15

12:30 pm-7:43 pm

1 stop8h 13m

Chicago O'Hare Intl

Tue 12/16

11:25 am-9:03 pm

1 stop8h 38m

$223

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Mon 12/8

12:30 pm-7:43 pm

1 stop8h 13m

Chicago O'Hare Intl

Tue 12/9

11:25 am-6:04 pm

1 stop5h 39m

$223

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Mon 12/15

12:30 pm-7:43 pm

1 stop8h 13m

Chicago O'Hare Intl

Wed 12/17

11:25 am-6:04 pm

1 stop5h 39m

$223

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 2/5

10:00 am-5:44 pm

1 stop8h 44m

Chicago O'Hare Intl

Sun 2/8

7:45 am-5:35 pm

1 stop8h 50m

$223

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 12/11

12:30 pm-7:43 pm

1 stop8h 13m

Chicago O'Hare Intl

Wed 12/17

11:25 am-6:04 pm

1 stop5h 39m

$223

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 12/11

12:30 pm-7:43 pm

1 stop8h 13m

Chicago O'Hare Intl

Tue 12/16

11:25 am-9:03 pm

1 stop8h 38m

$223

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 12/31

7:00 am-12:05 pm

1 stop6h 05m

Chicago O'Hare Intl

Thu 1/1

9:00 am-11:58 am

Nonstop1h 58m

$247

Washington, D.C.Moline

DCA - MLI

DCAMLI

Washington, D.C. Reagan-National

Tue 12/9

6:21 pm-10:33 pm

1 stop5h 12m

Moline Quad-City

Sun 12/14

6:00 am-11:37 am

1 stop4h 37m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

Showing 1-10 of 60 results
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Best time to book a flight from Reagan-National to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Reagan-National 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 Washington, D.C. Reagan-National Airport to Illinois

What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Illinois?

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Illinois (average of $98). Flying from Washington, D.C. Reagan-National Airport to Illinois in December is currently the most expensive (average of $214). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from DCA to IL?

Find hourly flight availability from Reagan-National to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 11, 2025.

It’s typically best to fly out from Washington, D.C. Reagan-National Airport to Illinois in the evening. Doing so could potentially save you 34% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Washington, D.C. Reagan-National Airport to Illinois?

Use this chart to determine the cheapest time to fly round-trip from Reagan-National to Illinois. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Washington, D.C. Reagan-National Airport to Illinois flight should consider departing on Thursday mornings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Washington, D.C. Reagan-National Airport to Illinois

Explore weekly flight availability from Reagan-National to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 11, 2025.

The most flights from DCA to USIL are scheduled on a Monday (46 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (33 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated November 11, 2025.
Get a feel of what it's like to fly with Southwest, United Airlines, and American Airlines from Washington, D.C. Reagan-National Airport to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,235 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,235 reviews
Southwest
8.0
Very good
4,235 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
9,012 reviews
Southwest
8.0
Very good
4,235 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,047 reviews
Southwest
8.0
Very good
4,235 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,113 reviews
Southwest
8.0
Very good
4,235 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to Illinois. 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 Washington, D.C. Reagan-National Airport to Illinois?

    For as low as $249, JetBlue can have you in Illinois from Washington, D.C. Reagan-National Airport in 4h 42m. The distance between Washington, D.C. Reagan-National Airport and Illinois is about 732 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Washington, D.C. Reagan-National Airport to Illinois one-way?

    One-way options have recently been found by users for as low as $98 on JetBlue. Other airlines that offer cheap prices include Southwest from $119 and Delta from $129 one-way.

  • What are the most popular routes from Washington, D.C. Reagan-National Airport to Illinois?

    While some choose either Washington, D.C. Reagan-National - Chicago Midway or Washington, D.C. Reagan-National - Lambert-St Louis, Washington, D.C. Reagan-National - Chicago O'Hare Intl is the most popular route from Washington, D.C. Reagan-National Airport to Illinois.

  • What are the most reliable airlines from Washington, D.C. Reagan-National Airport to Illinois?

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. Reagan-National Airport to Illinois consider choosing Envoy Air (100%), Cathay Pacific (88%) or Royal Jordanian (88%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Washington, D.C. Reagan-National Airport to Illinois?

    Looking at all options, your cheapest flight can be booked for $118. While the most popular route (Washington, D.C. Reagan-National - Chicago O'Hare Intl) can be booked for $193 on average, our data indicates $875 when flying from Washington, D.C. Reagan-National Airport to Illinois.

  • Can I find deals for flights from Reagan-National to Illinois that include hotel bookings?

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

  • How can I find direct flights from Reagan-National to Illinois?

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

  • Can I find deals for business class flights from Reagan-National to Illinois?

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

  • What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Illinois?

    Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Illinois (average of $98). Flying from Washington, D.C. Reagan-National Airport to Illinois in December is currently the most expensive (average of $214). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Reagan-National to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Reagan-National to Illinois

Discover the top 4 airlines that operate flights from Reagan-National to Illinois. 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 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$99Average$182FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$154Average$405FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$179Average$309FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$189Average$351FlexibilityNo cancel feeOn-time69%

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