CHI to WAS, to Cheap Flights

Based on HopeGoo data, Frontier Airlines offers one-way fares as low as US$49 on Cheapest nonstop routes (e.g. ORD to IAD on Sat, Mar 7), while American Airlines offers Cheapest nonstop round-trips from US$144 departing on Sat, Feb 28 and returning on Mon, Mar 2.

At the moment, you can catch a nonstop flight from Chicago to Washington D.C. with the following airlines, including: American Airlines Selected airlines are based on historical data collected from flight bookings users made on HopeGoo within the last 90 days.

It takes about 2 hours 46 minutes to fly from Chicago to Washington D.C..

By analyzing data from all airlines on the HopeGoo flight calendar, it looks like the best time to book a flight from Chicago to Washington D.C. is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

Based on HopeGoo data in the past 4 weeks, there is 154 flight per week flying from Chicago to Washington D.C.. You can check the weekly schedule for popular airlines on this route below: American Airlines: S/M/T/W/T/F/S -- AA2345 (06:29)

To find best deals on flights from Chicago to Washington D.C., you can use various tools on HopeGoo: · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sat, Mar 7, with one-way flights priced at just US$49. · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is United Airlines. · Set up price alerts to easily monitor ticket prices without having to check every day. · Check HopeGoo flight deals and promo codes frequently. · Avoid peak season unless you book very early. It seems the peak season for Washington D.C. travel is around January. · Get exclusive promo codes for HopeGoo app users.

The cheapest months to fly from Chicago to Washington D.C. is November, when demand for travel is lower.

After crunching the numbers on our February flight calendar, it's currently cheapest to fly from Chicago to Washington D.C. on February 11, 2026 with American Airlines, with prices starting at US$43.

You can land at any one of the following hubs in Washington D.C., with O'Hare International Airport to Dulles International Airport (ORD-IAD) is by far the most common option on this route: Ronald Reagan Washington National Airport (DCA) Dulles International Airport (IAD).

The time difference between Washington D.C. and Chicago is 1h.

Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your HopeGoo, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.