IAD - ORD

$74 Find Cheap Flights from Washington Dulles Airport to Chicago O'Hare Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to O'Hare Intl departing on 3/2. 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 Chicago O'Hare Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Chicago, 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 Chicago, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$160
Overall average: $369
Frontier
Thu 2/5Mon 2/9
IAD - ORD • 1 stop
Cheapest non-stop
$231
Typical prices: $273-$587
United Airlines
Sat 2/14Tue 2/17
IAD - ORD • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Use the AeroTrain for quick terminal transfers at IAD.
The CTA Blue Line from ORD offers a 45-minute downtown ride.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
United Airlines
Cheapest • from $231 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 55% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 17% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to O'Hare Intl!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Dulles Intl to O'Hare Intl (IAD-ORD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to O'Hare Intl 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 Dulles Intl to O'Hare Intl

Thu, Feb 5 - Mon, Feb 9
Frontier Logo
5:37 pm - 10:46 pm
IAD
-
ORD
6h 09m
1 stop
Frontier Logo
5:40 am - 4:28 pm
ORD
-
IAD
9h 48m
1 stop
$160Frontier
Thu, Feb 5 - Mon, Feb 9
Frontier Logo
5:37 pm - 10:46 pm
IAD
-
ORD
6h 09m
1 stop
Frontier Logo
5:40 am - 4:28 pm
ORD
-
IAD
9h 48m
1 stop
$161Frontier
Sun, Feb 22 - Wed, Feb 25
Frontier Logo
11:43 am - 10:39 pm
IAD
-
ORD
11h 56m
1 stop
Frontier Logo
11:51 am - 10:33 am
ORD
-
IAD
21h 42m
1 stop
$163Frontier
Fri, Feb 27 - Mon, Mar 2
Frontier Logo
5:37 pm - 10:39 pm
IAD
-
ORD
6h 02m
1 stop
Frontier Logo
5:05 am - 4:08 pm
ORD
-
IAD
10h 03m
1 stop
$169Frontier
Sat, Feb 7 - Wed, Feb 11
Multiple Airlines Logo
11:39 am - 10:44 pm
IAD
-
ORD
12h 05m
1 stop
Multiple Airlines Logo
5:15 am - 10:49 am
ORD
-
IAD
28h 34m
2 stops
$170Multiple Airlines
Sat, Feb 28 - Mon, Mar 2
Multiple Airlines Logo
10:29 am - 9:13 pm
IAD
-
ORD
11h 44m
2 stops
Multiple Airlines Logo
5:05 am - 4:08 pm
ORD
-
IAD
10h 03m
1 stop
$174Multiple Airlines
Sat, Feb 7 - Wed, Feb 11
Frontier Logo
11:39 am - 10:44 pm
IAD
-
ORD
12h 05m
1 stop
Frontier Logo
6:02 pm - 10:49 am
ORD
-
IAD
15h 47m
1 stop
$177Frontier
Mon, Mar 2 - Thu, Mar 5
Frontier Logo
11:41 am - 10:39 pm
IAD
-
ORD
11h 58m
1 stop
Frontier Logo
5:05 am - 4:43 pm
ORD
-
IAD
10h 38m
1 stop
$179Frontier
Thu, Mar 5 - Sun, Mar 8
Frontier Logo
5:37 pm - 10:39 pm
IAD
-
ORD
6h 02m
1 stop
Frontier Logo
4:28 pm - 12:31 am
ORD
-
IAD
7h 03m
1 stop
$180Frontier
Thu, Jan 29 - Mon, Feb 2
Frontier Logo
11:37 am - 11:16 pm
IAD
-
ORD
12h 39m
1 stop
Frontier Logo
5:40 am - 4:28 pm
ORD
-
IAD
9h 48m
1 stop
$181Frontier
Booking Insights

KAYAK's insights & trends for Dulles Intl to O'Hare Intl flights

Get data-powered insights and trends into flights from Dulles Intl to O'Hare Intl to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Washington Dulles Airport to Chicago O'Hare Airport?

The average price of all round-trip flights from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Washington Dulles Airport to Chicago O'Hare Airport, look for departures on Fridays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Chicago O'Hare Airport, Friday is the cheapest day to fly and Sunday is the most expensive.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport, 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. Dulles Intl Airport to Chicago O'Hare Intl Airport is September, where tickets cost $277 (return) on average. On the other hand, the most expensive months are January and December, where the average cost of round-trip tickets is $463 and $399 respectively.

Can I save money by flying with a layover from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport?

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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $330 on average.

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport?

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. Dulles Intl Airport to Chicago O'Hare Intl Airport, 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. Dulles Intl Airport to Chicago O'Hare Intl Airport, 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 23 weeks before departure.

Expert advice

Expert advice for your flight from Dulles Intl to O'Hare Intl

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
IAD

For a smooth departure from IAD, plan your route using the airport map and choose between the AeroTrain or mobile lounges for terminal transfers.

ORD

Take the CTA Blue Line from ORD to downtown Chicago for a 45-minute ride, avoiding traffic and offering free transfers to other lines.

Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on ORD and IAD

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more

Good to know

Low seasonFebruary
Cheapest flight$74
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly and prices are also 11% lower on average.
Flight from Washington Dulles Airport to Chicago O'Hare Airport

When to book flights from Dulles Intl to O'Hare Intl

Are your dates flexible? Find out the best times to travel from Dulles Intl to O'Hare Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington Dulles Airport to Chicago O'Hare Airport flights

  • Which airlines have their hub at O’Hare International Airport?

    Consider booking flights from Washington Dulles Airport to Chicago O’Hare with American Airlines, United Airlines, or Spirit Airlines. O’Hare International Airport (ORD) is a hub for United Airlines and American Airlines and is an operating base for Spirit Airlines. Flying with these three carriers gives you more flight options to ORD, and you can easily connect to other cities from the destination airport. American Airlines and Spirit Airlines operate out of Terminal 3, while United Airlines operates from Terminal 1.

  • Which airlines from Washington Dulles Airport to Chicago O’Hare Airport offer the Unaccompanied Minor Service?

    Delta Air Lines requires children aged five to 14 to use the Unaccompanied Minor Service when flying to ORD from IAD alone. It is also available for those aged from 15 to 17 on request. The accompanying guardian should also show a photo ID with their address, phone number, and the pick-up adult’s address, contact, and name at check-in.

  • Which airlines from Washington Dulles to Chicago O’Hare have accessible services for reduced-mobility passengers?

    Differently-abled travelers can book flights from Washington Dulles Airport (IAD) to Chicago O’Hare Airport (ORD) with Alaska Airlines or United Airlines. The carrier’s seats have armrests to ease movement, and aircraft lavatories have handrails. In addition to wheelchair assistance, they provide baggage handling services. Low-vision passengers get braille and large-print reading materials on Alaska Airlines, while hard-of-hearing travelers get free headsets.

  • What is the carry-on policy for flights from Washington Dulles to Chicago O’Hare?

    Frontier allows one carry-on and a personal item like a computer bag or a backpack on flights from IAD to ORD. The carry-on should be at most 35 lb and 24 x 16 x 10 inches to fit in the overhead bin. The personal item should be no larger than 14 x 18 x 8 inches and fit beneath an airplane seat.

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport was $74 for a one-way ticket and $160 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Chicago O'Hare Airport?

    No, a passport isn't needed to fly from Washington Dulles Airport to Chicago O'Hare Airport. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Washington Dulles Airport to Chicago O'Hare Airport?

    Washington Dulles Airport and Chicago O'Hare Airport are both served by 1 main airport. You will leave Washington Dulles Airport from Washington, D.C. Dulles Intl and will be arriving at Chicago O'Hare Intl.

  • Which airlines offer Wi-Fi service onboard planes from Washington Dulles Airport to Chicago O'Hare Airport?

    American Airlines, Delta, and Alaska Airlines offer inflight Wi-Fi service on the Washington Dulles Airport to Chicago O'Hare Airport flight route.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Chicago O'Hare Airport?

    The Boeing 737-900 is the aircraft model that flies most regularly on the Washington Dulles Airport to Chicago O'Hare Airport flight route.

  • Which airline alliances offer flights from Washington Dulles Airport to Chicago O'Hare Airport?

    Star Alliance is the only airline alliance operating flights between Washington Dulles Airport and Chicago O'Hare Airport.

  • On which days can I fly direct from Washington Dulles Airport to Chicago O'Hare Airport?

    There are nonstop flights from Washington Dulles Airport to Chicago O'Hare Airport on a daily basis.

  • Which is the best airline for flights from Washington, D.C. to Chicago, United Airlines or Frontier?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Chicago are United Airlines and Frontier. With an average price for the route of $334 and an overall rating of 7.4, United Airlines is the most popular choice. Frontier is also a great choice for the route, with an average price of $206 and an overall rating of 5.7.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Chicago O'Hare Airport?

    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 Washington Dulles Airport to Chicago O'Hare Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to Chicago O'Hare Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport from Washington Dulles Airport 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 Washington Dulles Airport to Chicago O'Hare Airport?

    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 to Chicago O'Hare Airport with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and ORD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Chicago O'Hare Airport?

    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 to Chicago O'Hare Airport from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $246 or less one-way and $334 or less round-trip.
  • If you are flying from Washington Dulles Airport (IAD) to O’Hare International Airport (ORD) with your kids, consider booking flights with Alaska Airlines. The airline has a Family Boarding program for fast-track boarding so you can get settled early.
  • Flights from IAD to ORD may have layovers, depending on your airline. United Airlines, Delta, American Airlines, and Alaska Airlines operate on this route, and they frequently stop at their operating bases or hubs, including Charlotte, San Francisco, Seattle, Detroit, and New Jersey.
  • Frontier and American Airlines are eco-friendly airlines that operate from IAD to ORD. Frontier has a young fuel-efficient fleet, and American Airlines has a carbon offset program that invests in carbon reduction projects.
  • You can fly First Class from IAD to ORD with American Airlines or United Airlines. United First passengers can access the United Club lounges in Terminal 1 near Gates B6 and B18. American Airlines First Class passengers get access to the American Airlines Admirals Club in Concourse G of ORD’s Terminal 3. Other perks include priority boarding and in-flight entertainment.
  • You can carry your pet on flights from IAD to ORD with American Airlines. The pet should be in an 18 x 11 x 11 inches kennel with enough room to move around. The total weight of the carrier plus pet should not exceed 20 lb.

Prefer to fly direct from Washington Dulles Airport to Chicago O'Hare Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Washington, D.C. Dulles Intl to Chicago O'Hare Intl.
Find which airlines fly direct from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport, which days they fly and book direct flights.

Direct departures

Washington, D.C. Dulles Intl to Chicago O'Hare Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

Chicago O'Hare Intl to Washington, D.C. Dulles Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Reviews of the top airlines flying from Dulles Intl to O'Hare Intl

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Chicago. 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 Dulles Intl to O'Hare Intl? 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.
7.4
United AirlinesOverall score based on 9177 reviews
7.7Boarding
8.1Crew
6.6Food
7.1Entertainment
7.3Comfort
Airline reviews

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

10.0 ExcellentDr. Joseph, Jan 2026
EWR - ORD
Read more United Airlines reviews

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

Everything was absolutely wonderful from check in to baggage claim. Staff was very professional and sweet. Will definitely recommend United to family and friends.

They did the one thing that really matters - got to Chicago early.

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

Very bad! They kept delaying my flight and wouldn’t do anything about it

Door to door, the crew and staff were amazing. It was a stressful travel day with delays, but they were focused on customers and doing what they could to get us to our destinations.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

It didn’t happen. I booked it and then was told it wasn’t available and then forced to pay far higher prices for a worse option

A 630departure flight Delayed 6hours! They changed my gate, I moved to the new gate. Had our flight on the screen for 12noon departure. I go get above to eat, check screen again and the flight was gone, no notice no announcement, nothing!! They sent my bag on the flight I wasn’t on, got it back to me 3days later. Thank goodness they did refund my money but I will NEVER fly them again.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

Plane and crew on board were fine. Everything else was terrible.

The third party booking with cheapflightsfares was awful. Kayak should NOT partner with them. They sold me a bundle including seat selection and carry-on, but did not book the carry-ons with Frontier, so I’m out of pocket for $414 more while I await resolution.

This company socks. It's fraud. They canceled our flight yesterday, and today we were late because of a really long line at the check in bag. At the rebook station, there was ton of people. The workers were all rude. I am gonna make a report to FTC.

One of the worst travel experiences I've had. Had a flight scheduled with CVG to RSW on VLSWQX this morning departing at 5:30. Two individuals at the gate and one was in training. Not her fault but she didn't have the ability to check people in resulting in at least 15 families that didn't make it on the plane because they weren't checked into the system in time. When arriving at the airport to drop off our prepaid checked bags, the bag drop off agent asked if we could check our bags at the gate because of the long line. We said no problem so arrived at the gate by 5:00. They told those people that had previously paid for checked bags to stand off to the side while they let others that either didn't have a checked bag or their bag was already on the plan through. Realizing the gate workers had an issue, they either called for help or this lady showed up late for work as she didn't arrive until 5:15. The worker who had been there training the other individual and working diligently to make sure all passengers got on board. He even said that at one point all people that are currently in line are fine but asked the person in training to stand outside the ticketing area around 5:15 to notify any late travels that the flight was in boarding process and they arrrived too late. At that point, we're sill standing off to the side with our pre-paid checked bags patiently waiting. When the new lady arrived she couldn't have been more rude. It was an awful seen. Essentially they had asked for those without an assigned seat to board last, those with pre-paid checked bag stand off to the site and any traveling with a larger items that needed to be checked at the gate (such as a stroller), wait on the side. They realized that the flight needed to leave on time so the gate attendant shut the gate. So anyone without a seat assignment, those that had pre-checked bags, and the worst one I saw was a mother with two infant children was in line with use because she was asked to stand to the side because her stroller. When they shut the door to the plan they told her she could no longer get on. Her checked bags were already on the plane with her car keys in them, and the lady told her we couldn't accept anyone else on because the door was shut. She didn't even have a way to get home from the airport. Truely evil behavior. I've flown Frontier enough to know customer service is not a top priority in the company's mission, but this was an all-time low. I'm sending this after an 18 hour drive that our family just completed to Bonita Springs . I felt really bad for the lady being trained and the other individual trying to help, but when the new lady came to the gate she was truly one of the rudest individuals I've ever met. One lady had been there since 4am but because she didn't have an assigned seat they wouldn't let her on the plan.

Everything you need to know for your flight from Dulles Intl to O'Hare Intl

Information on your arrival and departure airports