$104 Cheap Flights from Chicago (ORD) to Washington (IAD)

Popular airlines from Chicago O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD)

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Cheap Flights from Chicago to Washington (ORD-IAD)

Prices were available within the past 7 days and start at $104 for one-way flights and $157 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
United
United
United
United
Southwest Airlines
United
Delta
Frontier Airlines
American Airlines

Find the cheapest month to fly from Chicago (ORD) to Washington (IAD)

February is typically the cheapest month to fly

From $111 - $421 per traveler.

Graph displaying average flight prices per month

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Flights from Chicago (ORD) to Washington (IAD)
Origin airport
O'Hare Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$157
Distance
587 mi
Average flight time
3 hours 1 min

Chicago to Washington Flights

The cheapest times to fly from Chicago to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Chicago to Washington are during the month of August. You can find some of the cheapest flights from Chicago to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Chicago to Washington

Sunday is one of the best days to book for cheap flights from Chicago to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Chicago to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Chicago to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $104 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Chicago to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Chicago to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD) cost?
Find cheap return tickets from O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD) starting from $119. Reserve your seat and start your adventure. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a United and Spirit Airlines flight leaving ORD on August 19 2025 and touching down at IAD. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from ORD to IAD?
The cheapest flights from ORD to IAD are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD)?
Take a direct flight with United Airlines and head straight from O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD).
What is the cheapest airline that flies from ORD to IAD?
Fly from ORD to IAD with United. This airline currently has the cheapest one-way fare for this route, starting at $79. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from ORD on October 16 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD)?
With an average of 4 nonstop flights that operate from O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD) each day, you'll be cruising above the clouds before you know it.
What are the most popular departure times for flights from O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD)?
More people fly between ORD and IAD at 3 PM than at any other time. Looking to skip the crowds? Try choosing a quieter departure window and you could save on your fare as well.
What day of the week has the most flights from ORD to IAD?
Fly on a Friday if you're after the best choice of flights from O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD).
What is the earliest flight from O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD)?
Take the earliest flight at around 8:50AM UTC-6, heading out of O'Hare Intl. Airport (ORD). You'll be flying for approximately 1h 58m, reaching Washington Dulles Intl. Airport (IAD) at approximately 11:48AM UTC-5.
How long does it take to fly from O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD)?
It takes approximately 1 hour and 54 minutes to travel the 590 mi from ORD to IAD.
What airline has the least delays from ORD to IAD?
United Airlines has the best track record for on-time direct flights from O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD), with an on-time rating of 82%. Use the Expedia App to check your flight status before you take off and get notified of any changes.
What is the best time to fly from O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD)?
Book a flight from O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures after this time are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Washington from O'Hare Intl. Airport (ORD)?
O'Hare Intl. Airport (ORD) has direct flights to Washington. Here are some of the airports you can fly to without layovers:

  • Ronald Reagan Washington National Airport (DCA)
  • Baltimore Washington Intl. Thurgood Marshall Airport (BWI)
  • Washington Dulles Intl. Airport (IAD)

Is it cheaper to buy a plane ticket from O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD) last-minute?
Last-minute fares from ORD to IAD are usually more expensive. To secure the lowest rates, start searching for flights as soon as possible. That being said, if you can play around with your travel dates, you may land a cheap fare right before your trip.
Is it cheaper to book an ORD to IAD flight and hotel package?
Compared with arranging flights and hotels separately, booking an ORD to IAD flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one convenient place will take the hassle out of planning your trip. Simply pick your flights and choose from our extensive range of hotels, then customize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from O'Hare Intl. Airport (ORD) to Washington Dulles Intl. Airport (IAD)?
If you reserved your ORD to IAD flight within the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you want more information.

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