$99 Find Cheap Flights from Chicago to Washington Dulles Airport - Compare and Save

The cheapest return flight from Chicago to Washington, D.C. Dulles Intl Airport costs $247 on the route between Chicago O'Hare Intl Airport (ORD) and Washington, D.C. Dulles Intl Airport (IAD). It is also the most popular route.

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

The cheapest month for flights from Chicago to Washington, D.C. Dulles Intl Airport is October, where tickets cost $80 (return) on average. On the other hand, the most expensive months are July and June, where the average cost of round-trip tickets is $173 and $166 respectively.

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 $336 on average.

In the past 5 days, the cheapest round-trip tickets from Chicago to Washington Dulles Airport were found on Delta ($226) and Frontier ($227).

There are 2 airlines that fly nonstop from Chicago to Washington, D.C. Dulles Intl Airport. They are Frontier and United Airlines. The cheapest airline for this route is Frontier, with the best round-trip deal found costing $100. On average, the best prices for this route can be found at Frontier.

Weekly flights between Chicago and Washington, D.C. historically see delays in approximately 19% of cases, with the average delay over the past year being 131 minutes.

Typically, flights leaving in the morning tend to face fewer delays, whereas flights in the evening have historically encountered delays more often.

Statistically, Tuesday is the day of the week with the fewest delays on this flight route, while Sunday has typically experienced more delays than other days.

Based on our data, United Airlines have experienced the fewest delays on this route in the past 12 months, with only about 19% of their flights encountering any delays.

Atlanta (ATL) is the top choice – 87% of KAYAK users who clicked on 1-stop flights from Chicago to Washington Dulles Airport picked an itinerary connecting there.

Flights via Tampa (TPA) offer the most affordable fares, with an average round-trip price of $200.

Consider flying via Detroit (DTW) for the shortest journey. The average one-way travel time for flights connecting there is 3h 20m.

If you prefer a quick connection, Detroit (DTW) often has the shortest layovers from Chicago to Washington Dulles Airport, with an average of 0h 39m.

There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Each day, there are 7 nonstop flights that take off from Chicago and land in Washington, D.C. Dulles Intl Airport, with an average flight time of 2h 04m. The most common departure time is 6:00 pm and most flights take off in the morning. Each week, there are 49 flights and there are the same amount of flights each day (7).