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$85+ 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — ORD
Apr 8 — Apr 151
Tue 4/8
Tue 4/15
1 adult, Economy
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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 April 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$176
(Southwest)

One-way from

$85
(Frontier)

Popular in

March

Cheapest in

September

Average price

$246

Good round-trip deal

$244 or less

Good one-way deal

$169 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Chicago (CHI) flights.
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From Washington, D.C. Reagan-National to Illinois
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One-way flight from Washington, D.C. Reagan-National to Illinois
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Highest demand for flights based on searches. 0% potential increase in price ($1 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Washington, D.C. Reagan-National to Illinois.
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Price to beat on a one-way flight from Washington, D.C. Reagan-National to Illinois.
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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 April 3, 2025.

This Southwest deal was found by Cheapflights users on 4/2. 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.
Tue 5/131:10 pmDCA - MDW
1 stop3h 10mSouthwest
Wed 5/142:40 pmMDW - DCA
1 stop6h 25mSouthwest
Deal found 4/2$176
This Frontier deal was found by Cheapflights users on 4/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/181:03 pmDCA - MDW
1 stop12h 18mFrontier
Tue 4/226:45 amMDW - DCA
1 stop14h 14mFrontier
Deal found 4/2$178
This United Airlines deal was found by Cheapflights users on 4/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/245:59 pmDCA - ORD
Nonstop2h 16mUnited Airlines
Sun 5/257:00 amORD - DCA
Nonstop1h 57mUnited Airlines
Deal found 4/2$179
This Southwest deal was found by Cheapflights users on 4/2. 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.
Tue 5/136:05 amDCA - ORD
1 stop7h 40mSouthwest
Wed 5/144:00 pmORD - DCA
1 stop5h 25mSouthwest
Deal found 4/2$181
This American Airlines deal was found by Cheapflights users on 4/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/235:59 pmDCA - ORD
Nonstop2h 14mAmerican Airlines
Mon 4/287:17 pmORD - DCA
Nonstop1h 58mAmerican Airlines
Deal found 4/2$195
This Delta deal was found by Cheapflights users on 4/2. 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.
Wed 5/76:00 amDCA - ORD
1 stop4h 51mDelta
Tue 5/1311:05 amORD - DCA
1 stop3h 54mDelta
Deal found 4/2$197
This Delta deal was found by Cheapflights users on 4/2. 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.
Wed 4/236:00 amDCA - MDW
1 stop3h 40mDelta
Tue 4/295:59 pmMDW - DCA
1 stop4h 11mDelta
Deal found 4/2$197
This CheapOair deal was found by Cheapflights users on 4/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/257:00 amDCA - ORD
1 stop17h 37mFrontier
Mon 5/55:21 pmORD - DCA
1 stop27h 38mFrontier
Deal found 4/2$200
This JetBlue deal was found by Cheapflights users on 4/2. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/36:15 amDCA - ORD
1 stop6h 58mJetBlue
Mon 5/58:50 amORD - DCA
1 stop8h 10mJetBlue
Deal found 4/2$203
This Southwest deal was found by Cheapflights users on 4/2. 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.
Thu 5/293:00 pmDCA - STL
Nonstop2h 15mSouthwest
Tue 6/37:10 amSTL - DCA
1 stop4h 20mSouthwest
Deal found 4/2$214
This CheapOair deal was found by Cheapflights users on 4/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/201:03 pmDCA - STL
1 stop21h 03mFrontier
Mon 4/216:51 pmSTL - DCA
1 stop26h 08mFrontier
Deal found 4/1$220
This American Airlines deal was found by Cheapflights users on 4/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/298:15 amDCA - STL
Nonstop2h 27mAmerican Airlines
Tue 6/35:00 amSTL - DCA
1 stop4h 44mAmerican Airlines
Deal found 4/2$223

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 April 3, 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 - MDW

DCAMDW

Washington, D.C. Reagan-National

Tue 5/13

1:10 pm-3:20 pm

1 stop3h 10m

Chicago Midway

Wed 5/14

2:40 pm-10:05 pm

1 stop6h 25m

$176

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Fri 4/18

1:03 pm-12:21 am

1 stop12h 18m

Chicago Midway

Tue 4/22

6:45 am-9:59 pm

1 stop14h 14m

$178

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Sat 5/24

5:59 pm-7:15 pm

Nonstop2h 16m

Chicago O'Hare Intl

Sun 5/25

7:00 am-9:57 am

Nonstop1h 57m

$179

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Tue 5/13

6:05 am-12:45 pm

1 stop7h 40m

Chicago O'Hare Intl

Wed 5/14

4:00 pm-10:25 pm

1 stop5h 25m

$181

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 4/23

10:00 pm-11:16 pm

Nonstop2h 16m

Chicago O'Hare Intl

Sat 4/26

1:23 pm-4:19 pm

Nonstop1h 56m

$195

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 5/7

6:00 am-10:03 am

1 stop5h 03m

Chicago O'Hare Intl

Wed 5/7

5:15 pm-11:15 pm

1 stop5h 00m

$197

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Wed 4/23

6:00 am-8:40 am

1 stop3h 40m

Chicago Midway

Tue 4/29

5:59 pm-11:10 pm

1 stop4h 11m

$197

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Fri 4/25

7:00 am-11:37 pm

1 stop17h 37m

Chicago O'Hare Intl

Mon 5/5

5:21 pm-9:59 pm

1 stop27h 38m

$200

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Sat 5/3

6:15 am-12:13 pm

1 stop6h 58m

Chicago O'Hare Intl

Mon 5/5

8:50 am-6:00 pm

1 stop8h 10m

$203

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 5/29

3:00 pm-4:15 pm

Nonstop2h 15m

Lambert-St Louis

Tue 6/3

7:10 am-12:30 pm

1 stop4h 20m

$214

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 45 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, August is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Illinois (average of $245). Flying from Washington, D.C. Reagan-National Airport to Illinois in March is currently the most expensive (average of $321). 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 April 3, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Reagan-National Airport to Illinois as you normally would.

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 April 3, 2025.

The most flights from DCA to USIL are scheduled on a Thursday (46 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Illinois by month

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

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

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

If weather is an important factor for your trip to Illinois, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 April 3, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Washington, D.C. to Illinois to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,827 reviews

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

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
9,827 reviews
Alaska Airlines
8.0
Very good
9,827 reviews

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

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
4,274 reviews
Alaska Airlines
8.0
Very good
9,827 reviews

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

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
7,897 reviews
Alaska Airlines
8.0
Very good
9,827 reviews

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

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
8,616 reviews
Alaska Airlines
8.0
Very good
9,827 reviews

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

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
2,922 reviews
Alaska Airlines
8.0
Very good
9,827 reviews

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

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 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.

  • 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 $85 on Frontier. Other airlines that offer cheap prices include Southwest from $86 and United Airlines from $90 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 Japan Airlines (91%), Republic Airways (89%) or ANA (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 $98. While the most popular route (Washington, D.C. Reagan-National - Chicago O'Hare Intl) can be booked for $161 on average our data indicates $1,209 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, August is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Illinois (average of $245). Flying from Washington, D.C. Reagan-National Airport to Illinois in March is currently the most expensive (average of $321). 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.

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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.
Dulles Intl to Dallas/Fort Worth flights
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Dulles Intl to Miami flights
Reagan-National to Dallas/Fort Worth flights
Baltimore to Fort Lauderdale flights
Reagan-National to Seattle flights
Baltimore to Miami flights
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Dulles Intl to O'Hare Intl flights
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Baltimore to Atlanta flights
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Dulles Intl to Atlanta flights
Reagan-National to O'Hare Intl flights
Reagan-National to Tampa flights
Baltimore to San Francisco flights
Baltimore to Boston flights
Reagan-National to Denver flights
Baltimore to O'Hare Intl flights
Dulles Intl to Austin flights
Dulles Intl to New Orleans flights
Reagan-National to Hobby flights
Reagan-National to Nashville flights
Reagan-National to Fort Lauderdale flights
Dulles Intl to Nashville flights
Reagan-National to San Diego flights
Dulles Intl to Midway flights
Reagan-National to Austin flights

Top 5 airlines flying from Reagan-National to Illinois

Discover the top 5 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 April 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$101Average$219FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$170Average$386FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$177Average$312FlexibilityNo cancel feeOn-time63%
DeltaCheapest$177Average$498FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$193Average$365FlexibilityNo cancel feeOn-time69%

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