$82 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 5/2. 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, 0 bags

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

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$192
Moline
Moline1 stop$271
Peoria
Peoria1 stop$271
St. Louis
St. Louis2 stops$269
Chicago
Chicago1 stop$192
Moline
Moline1 stop$271
Peoria
Peoria1 stop$271
St. Louis
St. Louis2 stops$269

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

Sat, Apr 18 - Mon, Apr 20
Frontier Logo
6:00 pm - 9:45 am
DCA
-
ORD
16h 45m
1 stop
Frontier Logo
10:55 am - 1:00 pm
ORD
-
DCA
25h 05m
1 stop
$192Frontier
Wed, May 6 - Sat, May 9
Southwest Logo
8:00 am - 11:35 am
DCA
-
MDW
4h 35m
1 stop
Southwest Logo
11:00 am - 1:50 pm
MDW
-
DCA
1h 50mnonstop
$196Southwest
Thu, Apr 16 - Mon, Apr 20
Frontier Logo
6:00 pm - 9:50 am
DCA
-
ORD
16h 50m
1 stop
Frontier Logo
10:55 am - 1:00 pm
ORD
-
DCA
25h 05m
1 stop
$199Frontier
Wed, Apr 15 - Fri, Apr 17
Frontier Logo
6:00 pm - 9:50 am
DCA
-
ORD
16h 50m
1 stop
Frontier Logo
10:55 am - 9:59 pm
ORD
-
DCA
10h 04m
1 stop
$201Frontier
Sat, Apr 25 - Mon, Apr 27
American Airlines Logo
1:45 pm - 3:09 pm
DCA
-
ORD
2h 24mnonstop
American Airlines Logo
9:01 pm - 11:57 pm
ORD
-
DCA
1h 56mnonstop
$204American Airlines
Wed, Apr 1 - Wed, Apr 1
United Airlines Logo
8:20 am - 9:41 am
DCA
-
ORD
2h 21mnonstop
United Airlines Logo
2:00 pm - 5:04 pm
ORD
-
DCA
2h 04mnonstop
$209United Airlines
Sat, Apr 11 - Sat, Apr 11
American Airlines Logo
6:36 am - 10:11 am
DCA
-
ORD
4h 35m
1 stop
American Airlines Logo
9:01 pm - 11:57 pm
ORD
-
DCA
1h 56mnonstop
$210American Airlines
Tue, Apr 14 - Sat, Apr 18
Delta Logo
10:10 am - 3:32 pm
DCA
-
STL
6h 22m
1 stop
Delta Logo
11:42 am - 5:10 pm
STL
-
DCA
4h 28m
1 stop
$276Delta
Thu, Apr 9 - Sun, Apr 12
United Airlines Logo
6:30 am - 10:02 am
DCA
-
PIA
4h 32m
1 stop
United Airlines Logo
6:30 am - 11:59 am
PIA
-
DCA
4h 29m
1 stop
$289United Airlines
Sat, Jul 25 - Fri, Jul 31
Delta Logo
7:00 am - 11:11 am
DCA
-
BMI
5h 11m
1 stop
Delta Logo
4:00 pm - 10:20 pm
BMI
-
DCA
5h 20m
1 stop
$289Delta
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.

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 $237 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 $237.

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

The average price for all round-trip flights from Washington, D.C. Reagan-National Airport to Illinois depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Illinois is generally at night, when round-trip flights cost $361 on average. Morning departures are around 3% 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 $425.

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 $337, 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 July, when tickets cost $279 (return) on average. On the other hand, the most expensive months are March and November, when the average cost of round-trip tickets is $383 and $354 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 53% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$82
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 17% increase in price.
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.

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 $191 one-way - $341 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 4319 reviews
8.6Crew
7.5Entertainment
8.0Comfort
8.1Boarding
7.0Food
Airline reviews

Long layover between flights to Long Island from BWI - need better coordination between flights

4.0 OkayKenny, Mar 2026
TPA - BWI
Read more Southwest reviews

Long layover between flights to Long Island from BWI - need better coordination between flights

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

I realize they are still working out kinks with the new boarding process, but by the time I boarded in group 5, most of the bins were full. All airlines should better enforce small bags and jackets going under the seats until everyone has boarded.

WiFi was not working and didn’t have a beverage service

Snacks are always pretzels. Why can't you also offer peanuts ?

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

Wonderful. Quick boarding. Early departure and we arrived 30 minutes early at our destination. Unfortunately, when you arrive early, there is still a departing aircraft at our gate. We had to park for 30 minutes until the gate was clear. So our early arrival was not really early at the gate. Otherwise it was a quick and smooth flight. Appreciated the efficiency.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Ineffective communication with United resulted in lost baggage. Their Baggage Tracing counter at MUC was shut down from 11:00-14:15 on my arrival. Undertrained, underinformed staff had me Running all over MUC to find someone to help me to no avail. Staff was rude, unhelpful, and unable to effectively use the systems they did have operational. They refused to contact United in any way or provide any accommodation or other resources while I waited for my luggage. This has destroyed my downstream itinerary. If they had even the slightest visibility I may have been able to reschedule/plan, but again, their staff provided nothing, and did nothing more than their website, which doesn’t even work on a standard phone browser. Miserable failure at all levels that weren’t associated with the operation of the aircraft.

Sat next to a one year old. She crawled all over the place and made me laugh.

The Crew and the food was the worst I ever had in Business Class. First they told us there were no space for carry on. It was plenty of space over our 2 row seats, we had to ask to let us travel with it which was accepted. They were aware that we had to run for the connection due to the previous flight delay. Have us one hour waiting for more customers and not even offer a glass of water. Then started the service and they started to serve other passengers drinks in business and did not offer any drinks until they serve our pre ordered meal and I ask for something to drink. I had to wait until they finished to serve all passengers until Inget something. The crew was the worts I ever had for Business Class in my life.

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

Flight delay for mechanical. Inbound arrived on time. No one said why mechanical delay.

The chicken wrap was tiny ($13 for what looked like a 1/3 of a normal wrap?) and disgusting.

It was good experience this time. The flight was on time.

Flight boarded, departed and landed on time. Excellent service from flight attendant in FIRST

There was a delay with the plan which cause the flight to leave later and once arrived in Chicago there was another delay and some passengers missed their connecting flights

The gate agent had a really bad attitude and refused to help me get on the standby list. She just handed me a card and said I needed to call a number. I asked her to help with the AA app on my phone and she just shrugged and said she didnt know. After a few phone calls, I eventually just went to a different gate agent on the other side of the terminal and got the help I needed.

This was one of the most frustrating travel experiences I've had to date. I had changed my flight day of to this one as it was slated to depart on time. It ended up being so delayed that my original flight took off before this one did. The boarding process began but eventually stopped and everyone had to get off the plane as a problem was identified. The person at the front desk just tried to laugh it off as if this wasn't already a huge inconvenience. From there, we eventually got to board only to sit at the gate for an additional hour because of some additional issue. This was extremely frustrating and caused a lot of stress.

It was a little concerning to hear the ground crew arguing with the flight crew over baggage space. Instead of taking them and checking them, they started checking for space in the first class cabin moving items around like the flight crew didn't know what they were doing. I was embarrassed for them.

delayed due to weather. Could not communicate with family since the wifi was broken

I got sick nothing contagious but distressing and the care I received by Kayla? Keighly the flight attendant will be memorable for ever. Thank You

Remind customers of the need to have passport or new ID for boarding.

Flight was canceled. Most upsetting was message from Kayak, stating that the flight was canceled and click with Kayak for details regarding rebook, refund details. THERE'S NO INFORMATION PROVIDED BY KAYAK EXCEPT THAT FLIGHT IS CANCELED. AND NOW THIS SURVEY TO FIND OUT HOW WAS THE FLIGHT !!!!!!!

The flight never took off and we spent 7 hours at the airport

Gate not determined until I got to the airport - hard to plan the trip to the airport.

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

Frontier.. nickel and dime add-ons. Flight late, on time, late again, last minute gate change, arrival gate required a shuttle to the terminal. They sure keep you guessing.. if you like a little chaos and airport anxiety, this is the airline for you!

This is my second time flying with Frontier. My current experience was very favorable. The staff from the gate to the plane was friendly, warm and professional. The food options lacked in my opinion. This area needs some attention in my opinion.

There was no food and no entertainment, so I'm not sure why these are even in the survey, as my understanding is frontier does not ever offer food without a few, not even a snack, and there are no screens so unless the flight safety talk is our entertainment why ask how we liked it?. One of the flight attendants say in the back of the plane as people filed in to their seats, yelling orders about where to put baggage and telling people to hurry up. It was the least professional experience I've ever had on a flight.

Very well recently! Frontier is improving and less harrassing customer on luggages! Positive!

Good for a budget airline! It was easy to get on, staff was really nice. Can’t say anything about the food or entertainment because it wasn’t available, which is fine.

Everything you need to know for your flight from Reagan-National to Illinois

Information on your arrival and departure airports