$47 Find Cheap Flights from Illinois to District of Columbia

1 adult
1 adult, Economy

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

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

Save 22% 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.

Useful Info

Good to know

Low seasonFebruary
High seasonOctober
Cheapest flight$47
Best time to beat the crowds but there is an average 6% increase in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Chicago O'Hare Airport to Reagan Washington National Airport

FAQs for booking flights from Illinois to District of Columbia

  • How does KAYAK find such low prices on flights from Illinois to District of Columbia?

    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 Illinois to District of Columbia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to District of Columbia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Illinois to District of Columbia 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 Illinois to District of Columbia?

    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 Illinois to District of Columbia 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 Illinois to District of Columbia?

    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 Illinois to District of Columbia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which is the cheapest airport to fly into in District of Columbia?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in District of Columbia is Baltimore/Washington Airport (BWI), with an average flight price of $138.

  • What is the cheapest day to fly to District of Columbia?

    Based on KAYAK data, the cheapest day to fly to District of Columbia is Friday where round-trip tickets can be as cheap as $299. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $455 on average.

  • What is the cheapest time of day to fly to District of Columbia?

    The cheapest time of day to fly to District of Columbia is generally in the morning, when round-trip flights cost $301 on average. Morning departures are around 34% cheaper than evening flights, on average. The most expensive time of day to fly to District of Columbia is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $641.

  • What is the cheapest flight to District of Columbia?

    The cheapest ticket to District of Columbia from Illinois found in the last 72 hours was to Baltimore, at $82 round-trip. The most popular route is Chicago Midway Airport (MDW) to Baltimore (BWI) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $82.

  • What is the cheapest month to fly from Illinois to District of Columbia?

    The cheapest month for flights from Illinois to District of Columbia is April, when tickets cost $248 (return) on average. On the other hand, the most expensive months are October and June, when the average cost of round-trip tickets is $772 and $678 respectively.

  • How far in advance should I book a flight from Illinois to District of Columbia?

    To get a below average price on the flight from Illinois to District of Columbia, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

  • How long is the flight to District of Columbia?

    An average nonstop flight from Illinois to District of Columbia takes 4h 14m, covering a distance of 643 miles. The shortest route is Chicago O'Hare Intl Airport (ORD) to Washington, D.C. Reagan-National Airport (DCA) with an average flight time of 1h 43m.

  • What is the most popular destination in District of Columbia?

    Based on KAYAK flight searches, the most popular destination is Washington, D.C. (100% of total searches to District of Columbia).

Reviews of the top 5 airlines serving from Illinois to District of Columbia

 
Need help choosing which airline to fly with from Illinois to District of Columbia? 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 4250 reviews
7.6Entertainment
8.0Comfort
8.6Crew
8.1Boarding
7.0Food
Airline reviews

It was one and half hour late... Not sure if any other experience matters.

4.0 OkaySudhir, Jul 2025LGA - MCI
Read more Southwest reviews

It was one and half hour late... Not sure if any other experience matters.

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

For my birthday trip this was my second time ever flying, this trip was the best.

after landing, we stay 2 hours on the taxi way before reaching the gate The airline and the crew were good though

No trays in our seats, we sat in first row, purchased a business class fare. Had to hold our drinks and snack in our hands. No plugs for our cell phones. Had to pay for it a drink cocktail each. Seats so uncomfortable.

Flight wasn’t even full, but too many carry-ons caused us to run out of bin space. New bag fee has folks who would usually check their bags carrying on. Watching Southwest morph into Spirit/Frontier is so sad to watch

Sat on tarmac for 2 hours and then missed my connecting flight

First time traveling on Southwest since bag fees were implemented. Usual good service. Just more expensive now.

Everything was on time. I was disappointed by the front section female, African American flight attendant. I did not see her name tag or would have identified by name not race. As passengers moved to the bathroom early in flight, she would say with a disdainful tone “I have to say the seat belt light is on” then go back to her book. Better trained flight attendants say something like be careful the seat belt light is on.

Cluster mess boarding. Can't wait for SWA reserved seating. Internet didn't seem to work on the plane.

Very late arrival at PWM. Late jet getting to ATL. Equipment problem with aircraft - could not get enough water onto plane., Another delay getting FAA approval for flight with bottled H2O. Not the crew’s problem.

Everything was fine except the entertainment was not working for half of the flight.

Easy boarding with an extremely kind attendant. Seats were spacious and we had 3 seats for 2 people so we could stretch out. Comfortable air flow and very attentive and hospital attendants. Bathrooms and food were the only negative. Bathrooms were so small you could hardly get in and close the door. I don’t think an obese person would fit or a person with a movement disability. Food was the trending food for flights, nonexistent. We spent $40 getting sandwich and snack at airport for our 6 hour flught.

At first, we were on the runway for about an hour, literally. The Captain did explain that the Control Tower just had a change shift (sounds like an unrealistic excuse) and then that we had to change a runway. A regular economy seat is made for 12 yo twiggy. I understand Delta wants to push for an upgrade, but after sitting in a Comfort seat and in First class. I would say First class is not worthy of my money. The landing was delayed because of the weather in NYC, I don't hold that against Delta, of course. The Captain did alert us to that upon takeoff in Vegas and again as we reached NY.

No one fussed at me about my pap machine as a 3rd pice on the plane. Boarding was pleasant and smooth. The boarding agent in Anchorage was a fun character- he could be in a movie. :~) The on-board crew were downright pleasant. No militant attitudes on Delta. Like all planes these days the seats are too narrow for standard Americans and at 5’2” there is barely enough leg room. I don’t know how tall people fold themselves into the seats. But that’s nothing specific to Delta

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

My flight was extremely cold. I had a jacket and a cover was left in each seat. The cover was extremely thin and I have a disability, fibromyalgia and arthrithis and AC air is the worst. I closed my vent and my husbands vent and it still was frigid. I asked the attendant if I could get another cover and she quickly almost dismissively and totally unconcerned stating, (I quote) (one per chair) and walked off so quickly that I didn't get a chance to explain to her that I literally have adisability. I didnt want to make a seen so I set on that flight for over 5 hours in pain, joints locking up and extremely uncomfortable. When my fibromyalgia flares up my joints not only ache but they will lock up also and it takes me days to get back to my regular self even though I take medication for it. I felt like it would not have hurt anyone at all for her to just give me an extra cover because I'm sure they have all types of medical issues in people that fly every day.

After all the weather issues at least they got me to my destination the next day

My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.

They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.

It was great, I’m very grateful for the pilots and crew flight attendants for everything.

The attendant were friendly. I suggest you have a medical attendant on board every flight so that in case someone is sick , he/she will help them.

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

United airlines, mediocre at best. No issues , nothing great . Worked for me

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

Turbulent taking off & landing to Dulles from Raleigh. Flight from Dulles to Tokyo very good!!

I was charged for my daughters bag when I am supposed to receive two free checked bags with my United Explorer card.

The schedule to Moline changed 5 times. The gate changed 6 times. That is a pathetic way to run an airline. No wonder that no one in our company flies on United Express to or from Moline. Changes happen most of the time. I learned my lesson on this trip…never again!

Flight was great. Efficient boarding. Short flight. Early arrival. Friendly flight crew. The entertainment system did not work well. Could not access it until the aircraft reached 10K feet or more. Lots of glitches.

A bit rush for transit. Food and entertainment are not available

Initial flight was cancelled at the time of arrival to the airport, flight alternative requires switching from direct to flight with a layover, and the plane felt like it would split apart, it was so rattle-y.

Amazing food, great staff, with one noticable detail missing ...but no seat entertainment in any of aircraft ...I am not a fan

I wish American Airlines would change the airline industry by loading the plane back to front instead of front to back. Planes would board so much more smoothly and quickly.

Weather delay for 2.5 hours followed by half hour crew delay, did not have ginger ale, uncomfortable seats

It was nobody’s fault - but the plane came 4-hrs late and we were updated randomly in 20-30 mins increments which left us hostage to sit and wait expectantly. It was very long and got very late. Our plane didn’t land until nearly 1 am! Also the toilet wasn’t working. The hosts were nice enough but were clearly “about to pass out” as one told me. Lastly, there was no snack or even time for it. Just a bad experience overall.

I have long legs, my foot was out in the aisle and when a flight attendant came walking by and I didn't notice, instead of saying "excuse me" or anything like that, she kicked my foot. Extremely rude

Excellent! The gate agents were kind enough to rebook me on an earlier flight saving me from a 6 hour layover. Even my luggage made it despite the fact that the connection was technically too narrow. The flight itself was very comfortable, roomy, and clean. Plenty of space for my carryon items with plugs to charge my phone. After a long international flight of 14 hours, this was an excellent way to end my travels!

The boarding crew was incredibly helpful getting me on an earlier flight

Great experience. Flight boarded easily. Departed early. Smooth flight. Great arrival in DC--almost no taxing! Almost direct to gate from runway. Crew was terrific. Same cookies and beverages in main cabin. I did not use the entertainment system on this flight.

Flight delayed on both ends - have a gate ready at DCA, don't make us sit for 30min after being late to take off as well.

Terrible communication with weather delay, lost baggage, near impossible to reach customer service

My tickets got canceled on me by your site and I didn't have a flight. Then you kept sending me emails on the status of q flight I didn't have tickets for.

The delay was ridiculous because nary a word escaped from the gate attendant regarding our flight status. It was a complete joke.

I missed a flight because of a delay. I had to buy a new ticket through Southwest.

The crew was mostly okay. The flight attendant who answered our questions was curt and unhelpful unfortunately. He seemed upset and I understand having off days.

Flight was delayed one hour. Notification to the crowd waiting near the gate was terrible…announcements were unclear and very hard to hear and therefore understand. Frontier does NOT send texts to notify, only email. The reader board over the gate itself was NEVER updated to indicate the gate had been changed. It’s like a bunch of children are running things.

I’m not gonna fly Frontier Airlines because booking is not an option. No water or food is for high price, not equipped for health emergency incompetent crew for emergency services. Cheap airline shows it is cheaper in all service categories. Boarding is the best of all airlines!

We’ve all seen the YouTube vids of out of control passengers. But this was an instance of a highly aggressive, bully flight attendant. Yelling in the face of a vet with PTSD who was texting their family. And no , we had not yet been instructed to put our phones in airplane mode. My suggestion is that you should pay whatever difference there is in order to avoid Frontier airlines. Additionally, after 3hrs trying to get customer service frontier offered a $25 voucher. I declined. This experience was so traumatic. To be verbally assaulted and abused by a flight attendant that has the power to say “boo” and I miss my flight ( which was to a family member’s funeral ). Frontier is unsafe and I cannot impress enough how much I discourage anyone ( esp those with any kind of disability like PTSD ) flying on Frontier.

My flight was delayed by two hours which made it so that I would miss my layover flight. I stood in line for customer service for over an hour and when I reached the agent she told me to scan a QR code and it'll give me options. I wasn't offered any help, guidance or compensation, only told that I have options but that I had to figure it all out myself. I was refunded part of the trip and had to buy an expensive same day ticket from another airline in order to get home. I will never fly Frontier again.

We were delayed three times ,and that destroyed my plans, and reservations

Book cheap flights from Illinois to District of Columbia

Recent round-trip flight deals

8/18Mon
nonstopUnited Airlines
1h 57mORD-DCA
8/21Thu
nonstopUnited Airlines
2h 13mDCA-ORD
$93
8/7Thu
nonstopSouthwest
1h 50mMDW-DCA
8/11Mon
nonstopSouthwest
2h 00mDCA-MDW
$93
9/10Wed
nonstopUnited Airlines
1h 57mORD-IAD
9/13Sat
nonstopUnited Airlines
2h 15mIAD-ORD
$93
8/9Sat
nonstopAmerican Airlines
1h 56mORD-DCA
8/11Mon
nonstopAmerican Airlines
2h 21mDCA-ORD
$94
8/16Sat
nonstopSouthwest
1h 50mMDW-DCA
8/20Wed
1 stopSouthwest
6h 45mDCA-MDW
$103
8/23Sat
nonstopAmerican Airlines
1h 54mORD-DCA
8/30Sat
nonstopAmerican Airlines
2h 26mDCA-ORD
$117
7/31Thu
1 stopFrontier
8h 17mMDW-IAD
8/2Sat
1 stopFrontier
7h 45mIAD-MDW
$173
8/14Thu
1 stopFrontier
8h 43mSTL-IAD
8/17Sun
1 stopFrontier
8h 24mIAD-STL
$181
8/23Sat
1 stopDelta
3h 26mMDW-IAD
8/30Sat
1 stopDelta
4h 47mIAD-MDW
$197
8/14Thu
1 stopDelta
3h 17mORD-IAD
8/15Fri
1 stopDelta
5h 26mIAD-ORD
$197

Search by stops

Search by airline

Search by price

Recent one-way flight deals

8/25Mon
nonstopUnited Airlines
1h 58mORD-DCA
$47
8/18Mon
nonstopSouthwest
1h 55mMDW-DCA
$47
9/11Thu
nonstopUnited Airlines
1h 57mORD-IAD
$47
12/3Wed
nonstopAmerican Airlines
2h 08mSTL-DCA
$52
8/25Mon
nonstopSouthwest
2h 05mSTL-DCA
$53
8/13Wed
nonstopAmerican Airlines
2h 01mSTL-DCA
$62
8/9Sat
1 stopFrontier
7h 34mSTL-IAD
$75
8/17Sun
1 stopFrontier
8h 43mSTL-IAD
$80
8/7Thu
1 stopDelta
6h 49mSTL-DCA
$99
8/15Fri
1 stopDelta
4h 35mORD-DCA
$99

Search by stops

Search by airline

Search by price

Last minute flights from Illinois to District of Columbia

Last minute flight, train and bus deals

7/12Sat
multi-stopFrontier
9h 15mORD-IAD
7/21Mon
multi-stopFrontier
11h 04mIAD-ORD
$195
7/12Sat
multi-stopFrontier
5h 12mORD-IAD
7/13Sun
multi-stopFrontier
5h 15mIAD-ORD
$213
7/15Tue
multi-stopAmerican Airlines
4h 20mMLI-DCA
7/19Sat
multi-stopAmerican Airlines
6h 56mDCA-MLI
$309
7/11Fri
multi-stopAmerican Airlines
6h 36mMLI-IAD
7/15Tue
multi-stopAmerican Airlines
5h 29mIAD-MLI
$324
7/11Fri
multi-stopDelta
5h 46mMLI-DCA
7/15Tue
multi-stopDelta
4h 59mDCA-MLI
$324
7/15Tue
multi-stopUnited Airlines
4h 10mMLI-IAD
7/19Sat
multi-stopUnited Airlines
6h 58mIAD-MLI
$379
7/12Sat
multi-stopUnited Airlines
6h 05mPIA-IAD
7/19Sat
multi-stopUnited Airlines
5h 19mIAD-PIA
$394
7/15Tue
multi-stopDelta
6h 08mMDW-DCA
7/22Tue
multi-stopDelta
7h 01mDCA-MDW
$430
7/15Tue
nonstopSouthwest
1h 50mMDW-DCA
7/16Wed
nonstopSouthwest
1h 55mDCA-MDW
$437
7/15Tue
nonstopSouthwest
1h 50mMDW-DCA
7/22Tue
multi-stopSouthwest
4h 30mDCA-MDW
$447

Search by stops

Search by airline

Search by price

Everything you need to know for your flight to District of Columbia

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.