Cheap flights from Chicago O'Hare Intl Airport to Washington, D.C. from $90

The month of December is, on average, the cheapest month to fly to Washington, D.C. from Chicago O'Hare Intl Airport, with most prices found around $335. If you’re not able to fly to Washington, D.C. in December, then November is your next best option. Flight prices from Chicago O'Hare Intl Airport to Washington, D.C. during November average around $343.

On average, the least expensive day to fly to Washington, D.C. from Chicago O'Hare Intl Airport is on a Friday. momondo users have found tickets for Friday departures for as low as $383. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Chicago O'Hare Intl Airport to Washington, D.C. for around $541.

In the morning is the cheapest time of day to fly from Chicago O'Hare Intl Airport to Washington, D.C. when you can find flight prices for as low as $410. Flying to Washington, D.C. in the morning is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $709. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Chicago O'Hare Intl to Baltimore/Washington for the best Chicago O'Hare Intl - Washington, D.C. flight prices

You are more likely to see cheaper flights to Washington, D.C. from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $376 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from Chicago O'Hare Intl Airport for as low as $250 on momondo.

There are 4 cabin classes available to choose from on Chicago O'Hare Intl Airport to Washington, D.C. flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 4% on your flight if you consider stops on a Chicago O'Hare Intl Airport to Washington, D.C. flight.

As of October 2026, prices for Chicago O'Hare Intl Airport to Washington, D.C. flights are approximately 43% cheaper when compared to flights at the same time last year.

Frontier, United Airlines, and Delta are the most popular carriers operating from Chicago O'Hare Intl to Washington, D.C.

United Airlines, American Airlines and Frontier are the top three most popular airlines that fly to Washington, D.C. from Chicago O'Hare Intl Airport according to our data. United Airlines is the first choice among our users, with 66% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 4 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

Historically, on average around 22% of flights between Chicago and Washington, D.C. have experienced a delay on any given week. The average delay length over the past 12 months has been 138 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 21% of their flights experiencing any sort of delay.

Charlotte (CLT) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

Flights via Detroit (DTW) offer the lowest average round-trip price of $364.

Flights connecting via Detroit (DTW) have the shortest average one-way travel time: 3h 56m.

Detroit (DTW) has the shortest average layover time for this route: 1h 19m.

99 flights are operational daily from Chicago O'Hare Intl Airport to Washington, D.C. as of October 2026. The most popular departure time for this route is 10:00AM, with 38% of flights per day taking off at noon.

694 flights are operational weekly from Chicago O'Hare Intl Airport to Washington, D.C. as of October 2026. The most popular departure day for this route is Mon, with 16% of flights per week taking off on this day.