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$86+ 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 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — ORD
Feb 4 — Feb 111
Tue 2/4
Tue 2/11
1 adult, Economy
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Cheap flight deals from Reagan-National to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$175
(Trip.com)

One-way from

$86
(Booking.com)

Popular in

March

Cheapest in

September

Average price

$230

Good round-trip deal

$265 or less

Good one-way deal

$185 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Chicago (CHI) flight deals.
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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. 2% potential increase in price ($6 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 January 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 January 30, 2025.

This United Airlines deal was found by Cheapflights users on 1/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/33:30 pmDCA - ORD
Nonstop2h 21mUnited Airlines
Tue 3/412:45 pmORD - DCA
Nonstop1h 51mUnited Airlines
Deal found 1/29$177
This Southwest deal was found by Cheapflights users on 1/30. 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.
Thu 2/2011:55 amDCA - MDW
Nonstop2h 10mSouthwest
Mon 2/246:25 amMDW - DCA
Nonstop1h 50mSouthwest
Deal found 1/30$177
This Frontier deal was found by Cheapflights users on 1/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/137:00 amDCA - ORD
1 stop7h 25mFrontier
Wed 2/196:50 amORD - DCA
1 stop14h 09mFrontier
Deal found 1/29$180
This Frontier deal was found by Cheapflights users on 1/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/91:03 pmDCA - MDW
1 stop12h 16mFrontier
Thu 3/136:40 amMDW - DCA
1 stop9h 19mFrontier
Deal found 1/29$181
This Southwest deal was found by Cheapflights users on 1/29. 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.
Wed 3/56:10 amDCA - ORD
1 stop6h 20mSouthwest
Wed 3/53:10 pmORD - DCA
1 stop6h 25mSouthwest
Deal found 1/29$191
This American Airlines deal was found by Cheapflights users on 1/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/216:59 amDCA - ORD
Nonstop2h 18mAmerican Airlines
Sat 2/228:20 pmORD - DCA
Nonstop1h 49mAmerican Airlines
Deal found 1/30$198
This United Airlines deal was found by Cheapflights users on 1/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/156:20 amDCA - PIA
1 stop5h 00mUnited Airlines
Tue 2/185:20 pmPIA - DCA
1 stop5h 37mUnited Airlines
Deal found 1/29$199
This American Airlines deal was found by Cheapflights users on 1/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/226:00 amDCA - MLI
1 stop6h 06mAmerican Airlines
Tue 2/255:00 amMLI - DCA
1 stop5h 00mAmerican Airlines
Deal found 1/30$199
This Delta deal was found by Cheapflights users on 1/30. 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.
Sat 2/2210:30 amDCA - ORD
1 stop3h 48mDelta
Mon 2/245:10 pmORD - DCA
1 stop4h 40mDelta
Deal found 1/30$207
This Kissandfly.com deal was found by Cheapflights users on 1/29. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/16:00 amDCA - ORD
1 stop6h 05mSpirit Airlines
Mon 3/33:00 pmORD - DCA
Nonstop1h 54mSpirit Airlines
Deal found 1/29$212
This Delta deal was found by Cheapflights users on 1/30. 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.
Fri 2/286:00 amDCA - MDW
1 stop3h 51mDelta
Mon 3/32:08 pmMDW - DCA
1 stop4h 52mDelta
Deal found 1/30$217
This JetBlue deal was found by Cheapflights users on 1/30. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/126:30 amDCA - ORD
1 stop6h 47mJetBlue
Wed 5/211:12 pmORD - DCA
1 stop8h 47mJetBlue
Deal found 1/30$220

Find flights from Reagan-National to Illinois within your budget

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 January 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Tue 3/4

7:00 am-1:25 pm

1 stop7h 25m

Chicago O'Hare Intl

Sun 3/9

6:45 am-12:03 pm

1 stop28h 18m

$175

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 2/20

6:25 am-7:45 am

Nonstop2h 20m

Chicago O'Hare Intl

Thu 2/20

9:05 pm-11:57 pm

Nonstop1h 52m

$177

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Thu 2/20

11:55 am-1:05 pm

Nonstop2h 10m

Chicago Midway

Mon 2/24

9:15 am-12:00 pm

Nonstop1h 45m

$177

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 2/20

11:59 am-1:14 pm

Nonstop2h 15m

Chicago O'Hare Intl

Mon 2/24

6:06 am-8:54 am

Nonstop1h 48m

$178

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Mon 2/10

6:00 pm-12:17 am

1 stop7h 17m

Chicago Midway

Thu 2/20

6:40 am-4:59 pm

1 stop9h 19m

$180

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Fri 5/2

6:30 am-12:17 pm

1 stop6h 47m

Chicago O'Hare Intl

Sat 5/3

10:50 am-5:53 pm

1 stop6h 03m

$183

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 3/5

6:10 am-11:30 am

1 stop6h 20m

Chicago O'Hare Intl

Wed 3/5

3:10 pm-10:35 pm

1 stop6h 25m

$191

Washington, D.C.Peoria

DCA - PIA

DCAPIA

Washington, D.C. Reagan-National

Sat 2/15

6:20 am-10:20 am

1 stop5h 00m

Greater Peoria

Tue 2/18

5:20 pm-11:57 pm

1 stop5h 37m

$199

Washington, D.C.Moline

DCA - MLI

DCAMLI

Washington, D.C. Reagan-National

Sat 2/22

6:00 am-11:06 am

1 stop6h 06m

Moline Quad-City

Tue 2/25

5:00 am-11:00 am

1 stop5h 00m

$199

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Sat 2/22

10:30 am-1:18 pm

1 stop3h 48m

Chicago O'Hare Intl

Mon 2/24

5:10 pm-10:50 pm

1 stop4h 40m

$207

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

Showing 1-10 of 49 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.

Travel insights for flights from Reagan-National to Illinois

Get recent, data-driven insights about flights from Reagan-National to Illinois including ideal travel times, pricing trends, and more.

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 $325). 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 January 30, 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 January 30, 2025.

The most flights from DCA to USIL are scheduled on a Tuesday (45 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 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 January 30, 2025.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines 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.
Southwest
8.1
Very good
4,585 reviews

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Overall

8.1

Food

7.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,585 reviews
Southwest
8.1
Very good
4,585 reviews

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Overall

8.1

Food

7.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,686 reviews
Southwest
8.1
Very good
4,585 reviews

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Overall

8.1

Food

7.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,450 reviews
Southwest
8.1
Very good
4,585 reviews

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Overall

8.1

Food

7.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

JetBlue
7.4
Good
3,153 reviews
Southwest
8.1
Very good
4,585 reviews

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Overall

8.1

Food

7.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,906 reviews
Southwest
8.1
Very good
4,585 reviews

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Overall

8.1

Food

7.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 $86 on Frontier. Other airlines that offer cheap prices include United Airlines from $89 and Southwest from $89 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 (91%) or ANA (89%) 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 $114. While the most popular route (Washington, D.C. Reagan-National - Chicago O'Hare Intl) can be booked for $144 on average our data indicates $1,018 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 $325). 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.
Reagan-National to Miami flights
Dulles Intl to Orlando flights
Baltimore to Fort Lauderdale flights
Dulles Intl to Miami flights
Baltimore to Orlando flights
Baltimore to Miami flights
Reagan-National to Orlando flights
Baltimore to Dallas/Fort Worth flights
Dulles Intl to Las Vegas flights
Dulles Intl to Dallas/Fort Worth flights
Dulles Intl to Atlanta flights
Dulles Intl to New Orleans flights
Dulles Intl to Tampa flights
Reagan-National to Los Angeles flights
Dulles Intl to Fort Lauderdale flights
Dulles Intl to Denver flights
Baltimore to Los Angeles flights
Baltimore to Hobby flights
Reagan-National to New Orleans flights
Dulles Intl to Sky Harbor Intl flights
Reagan-National to Las Vegas flights
Baltimore to Las Vegas flights
Reagan-National to Dallas/Fort Worth flights
Baltimore to O'Hare Intl flights
Reagan-National to Fort Lauderdale flights
Dulles Intl to O'Hare Intl flights
Baltimore to Denver flights
Dulles Intl to Hobby flights
Reagan-National to O'Hare Intl flights
Reagan-National to San Francisco flights
Reagan-National to Seattle flights
Baltimore to New Orleans flights
Dulles Intl to San Francisco flights
Baltimore to Tampa flights
Reagan-National to Denver flights
Dulles Intl to Seattle flights
Dulles Intl to Los Angeles flights
Reagan-National to Atlanta flights
Reagan-National to Sky Harbor Intl flights
Reagan-National to Tampa flights
Dulles Intl to George Bush Intcntl flights
Reagan-National to Hobby flights
Dulles Intl to Boston flights
Dulles Intl to West Palm Beach flights
Baltimore to San Francisco flights
Dulles Intl to Austin flights
Reagan-National to West Palm Beach flights
Reagan-National to Boston flights
Baltimore to Seattle flights
Baltimore to George Bush Intcntl 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 January 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$101Average$219FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$159Average$324FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$163Average$399FlexibilityNo cancel feeOn-time71%
DeltaCheapest$177Average$324FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$189Average$387FlexibilityNo cancel feeOn-time69%
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