$80 Find Cheap Flights from Reagan Washington National Airport to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Reagan-National to Illinois departing on 8/31. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Illinois, as well as popular online travel agencies
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Cheap Flights from Reagan-National to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Chicago
Chicago1 stop$160
Moline
Moline1 stop$199
Peoria
Peoria1 stop$199
St. Louis
St. Louis1 stop$191
Chicago
Chicago1 stop$160
Moline
Moline1 stop$199
Peoria
Peoria1 stop$199
St. Louis
St. Louis1 stop$191

Book Cheap Reagan-National to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Reagan-National to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Reagan-National to Illinois

Fri, Sep 5 - Mon, Sep 8
Frontier Logo
1:00 pm - 11:59 pmDCA-ORD
11h 59m1 stop
Frontier Logo
10:42 am - 4:59 pmORD-DCA
29h 17m1 stop
$160Frontier
Find Deal
Thu, Sep 18 - Mon, Sep 22
Frontier Logo
6:00 pm - 2:51 pmDCA-MDW
21h 51m1 stop
Frontier Logo
4:48 pm - 4:59 pmMDW-DCA
23h 11m1 stop
$160Frontier
Find Deal
Fri, Sep 5 - Sat, Sep 6
United Airlines Logo
5:00 pm - 8:52 pmDCA-PIA
4h 52m1 stop
United Airlines Logo
6:55 am - 2:01 pmPIA-DCA
6h 06m1 stop
$199United Airlines
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Fri, Sep 5 - Sat, Sep 6
United Airlines Logo
1:00 pm - 7:27 pmDCA-MLI
7h 27m1 stop
United Airlines Logo
3:40 pm - 9:03 pmMLI-DCA
4h 23m1 stop
$199United Airlines
Find Deal
Tue, Oct 14 - Wed, Oct 22
JetBlue Logo
6:25 am - 12:10 pmDCA-ORD
6h 45m1 stop
JetBlue Logo
1:36 pm - 7:22 pmORD-DCA
4h 46m1 stop
$203JetBlue
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Wed, Oct 15 - Fri, Oct 24
JetBlue Logo
6:25 am - 12:10 pmDCA-ORD
6h 45m1 stop
JetBlue Logo
1:35 pm - 7:20 pmORD-DCA
4h 45m1 stop
$206JetBlue
Find Deal
Sat, Oct 11 - Mon, Oct 13
American Airlines Logo
3:50 pm - 5:13 pmDCA-ORD
2h 23mnonstop
American Airlines Logo
8:04 pm - 11:12 pmORD-DCA
2h 08mnonstop
$217American Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
Southwest Logo
6:35 pm - 7:30 pmDCA-MDW
1h 55mnonstop
Southwest Logo
12:15 pm - 3:10 pmMDW-DCA
1h 55mnonstop
$217Southwest
Find Deal
Wed, Oct 1 - Sat, Oct 4
Southwest Logo
9:00 am - 10:00 amDCA-MDW
2h 00mnonstop
Southwest Logo
6:30 am - 11:20 amMDW-DCA
3h 50m1 stop
$227Southwest
Find Deal
Thu, Oct 9 - Thu, Oct 16
American Airlines Logo
6:59 am - 8:24 amDCA-ORD
2h 25mnonstop
American Airlines Logo
8:04 pm - 11:12 pmORD-DCA
2h 08mnonstop
$229American Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Reagan-National to Illinois flights

Get data-powered insights and trends into flights from Reagan-National to Illinois to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Washington, D.C. Reagan-National Airport to Illinois?

What is the cheapest Washington, D.C. Reagan-National Airport to Illinois flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Illinois from Washington, D.C. Reagan-National Airport found in the last 72 hours was to Chicago, at $157 round-trip. The most popular route is from Washington, D.C. Reagan-National Airport (DCA) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $174.

Can I save money by flying with a layover from Washington, D.C. Reagan-National Airport to Illinois?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $407, prices are generally cheapest when you fly direct.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Reagan-National Airport to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. Reagan-National Airport to Illinois is September, when tickets cost $243 (return) on average. On the other hand, the most expensive months are December and August, when the average cost of round-trip tickets is $360 and $333 respectively.

What’s the cheapest day of the week to fly from Reagan Washington National Airport to Illinois?

The average price of all round-trip flights from Washington, D.C. Reagan-National Airport to Illinois clicked on KAYAK for each day over the last 12 months.

For Reagan Washington National Airport to Illinois, Friday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Illinois back to Reagan Washington National Airport, the best deals are generally found on Thursday, with Monday being the most expensive.

How far in advance should I book a flight from Washington, D.C. Reagan-National Airport to Illinois?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. Reagan-National Airport to Illinois, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Washington, D.C. Reagan-National Airport to Illinois, you should book around 4 weeks before departure, which saves you about 55% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$80
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly and prices are also 18% lower on average.
Flight from Reagan Washington National Airport to Chicago O'Hare Airport

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Reagan Washington National Airport to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Reagan Washington National Airport to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Reagan Washington National Airport to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Reagan Washington National Airport to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Reagan Washington National Airport to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Reagan Washington National Airport to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Reagan Washington National Airport to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Reagan Washington National Airport to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally at night, when round-trip flights cost $347 on average. Morning departures are around 4% cheaper than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $437.

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from Reagan Washington National Airport to the following destinations at these prices or less: Chicago $177 one-way - $295 round-trip

Reviews of the top 4 airlines serving from Reagan-National to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Reagan-National to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4243 reviews
8.1Boarding
7.5Entertainment
8.0Comfort
8.6Crew
7.0Food
Airline reviews

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

2.0 MediocreMike, Aug 2025AUS - BWI
Read more Southwest reviews

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

Southwest's seats are the least comfortable I have ever sat in.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Southwest like most American domestic airlines, is a mediocre airline. But it is among the cheapest. Oh well.

My flight was delayed 50 minutes and we were rushed to board to then sit for 15 minutes until the pilot arrived. Unacceptable since we could have waited to board. Also the delayed flight was updated AFTER we boarded to more than the 10 minutes as originally stated.

Other than a bit of a delay, everything was good. Again, the boarding process and picking seats is the only thing I don't enjoy.

If we are going to have to pay for luggage, make it easier to do. Put something on the app during check-in so I don't need to do it at the kiosk. I've done it twice recently and I ended up having to pay at the desk because something went wrong at the kiosk in Tampa.

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

The quality of Southwest Airlines continues to degrade each time I fly with them. If it were not for the free luggage, I would probably choose another airline. Their prices are a little bit competitive, but way too high for the quality of the service. Southwest is not unique in this way. Domestic flight in the United States of America has continued to be a lower and lower quality product. Very sad when you compare the quality of domestic airlines to that of many international airlines around the world.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight attendant in first class gave poor service (like he didn't want to be there) and food was awful. We sat waiting for gate upon arrival over 45 mins.

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

We were given vouchers we couldn’t use with a 5.5 hour delay

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

The AA staff person who checked our bags was curt and almost rude. The FA also seemed unhappy doing her job. Overall it was like riding the school bus back in grade school.

Any flight to ORD after about 2pm this summer has been challenging. Flight was delayed getting in (coming from ORD) and that led to it not leaving before a ground stop due to lightening before they could fuel the plane, and so forth. They made up some time but we were still late in arriving at ORD, and that led to missed connections.

Food was ok, but not as good as I have had before on AA.

Pretty good. The food was just mediocre, the boarding and crew were good.

My flight got switched and my prepaid bag didnt transfer over properly so I paid to check ANOTHER BAG. I was placed in a middle seat and it was just miserable. At least it was a bulkhead row so I had legroom. The flight just never seem3d to end

Was not able to watch most shows on the entertainment site. They would not load

On Wednesday, July 30 we were in mid flight from Manchester to Charlotte and we turned around because the right engine was malfunctioning. That was the last flight out of Manchester that night. I was rebooked for Thursday, which became a weather event Friday. There were no seats left on the flight from Manchester to Charlotte. Consequently I didn’t leave Manchester until Saturday morning and we flew to Chicago so to say the least my scheduled flight and return to Iowa was three days off and it messed with my business schedule. Consequently cash flow. I would like some sort of acknowledgment of this event.

Dreadful experience. Our flight was delayed more than 8 hours due to a maintenance issue and the assistance from rebooking was poor. I was travelling with a bad knee and needed assistance waited in one place more than 3 hours before someone came with a wheelchair. The woman next to me was a 91 year old great grandmother who had waited more than 4 hours. There were moments of support from the staff but it appeared as they were going against the direction of management. It was apathy, lack of ownership and dismissive responses with small moments of kindness and understanding typically from grey haired, female, veteran staff..

Couldn’t get the door on the plane to close leading to a nearly 2 hour delay. But, hey at least they didn’t cancel the flight.

The flight was fine and the crew awesome. The problem is ORD and AA. Computers went down, ORD fell apart and a 40 min flight turned into a 3 hour trip. Guess the answer is to not try and fly to ORD after noon. But, as I said, crew was awesome and did everything they could to lesson the flight time.

Great for the price. No wifi or entertainment, but gate agents and crew were fantastic and we boarded quickly and left on time.

sluggish boarding and arrival procedures, fake nice flight attendants, and lots of delays.

Disaster. They lied every step of the way. We ended up being delayed due to crew and then allegedly abandoned the flight because of a curfew at LGA. No rebooking to LGA at any reasonable time. No hotel. No meal vouchers. Had to sleep in the airport and fly to Newark instead. Will never fly Frontier again.

What I expected, nickeled and dined and a frontier flight attendant loudly complained about her job and lack of communication as she headed to the gate on her cell phone. Not professional.

As every law enforcement agency I could imagine surrounded the plane and we didn’t disembark for 2 hours and then had to stick around for another hour to go get our personal belongings after leaving them behind and being bused away from the plane, it was scary and inconvenient. We were given no information as to why this was happening. Lack of communication with passengers was disappointing.

After boarding and un-boarding twice over 6+hours, the flight was canceled.

Severe turbulence. Captain never came on to reassure passengers after things settled down.

My first flight was delayed 5 hours. The 2nd flight was canceled til the next day and the never even tried to compensate for it. Worse I was delayed again on the flight the rebooked me on.

Boarding in Orlando was not good. Giant mob at the gate, should have been lines.

Decent clean onboard experience. Okay discount airline experience. Unfortunately, any customer service interactions are difficult and unhelpful. There is no service. Also, a premium seat only gets you premium boarding if you line up first. Once they start general boarding you must go to the back of the line. Not very premium

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