$89 Find Cheap Flights from Chicago to Washington Dulles Airport - Compare and Save

Among airlines operating Chicago to Washington, D.C. Dulles Intl Airport flights:

• United Airlines: offers extra legroom; offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Only United Airlines operates flights between Chicago and Washington, D.C. Dulles Intl Airport.

Flights from Chicago to Washington, D.C. Dulles Intl Airport may depart from several airports in Chicago area, including Chicago Midway (MDW), Chicago O'Hare Intl (ORD) and Chicago Greater Rockford (RFD). Flights usually arrive at Washington, D.C. Dulles Intl (IAD).

Here are some options for this route, based on selected ticket types and cabin classes:

• United Airlines: a cabin bag and a checked bag in Economy Class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Three cabin classes are available on flights from Chicago to Washington, D.C. Dulles Intl Airport:

• Economy Class
• Premium Economy Class
• First Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $200 round-trip via Tampa (TPA), compared to $352 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$80 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

One-stop flights from Chicago to Washington, D.C. Dulles Intl Airport most commonly connect through:

• Atlanta Hartsfield-Jackson (ATL) - 85% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 10% of one-stop connections
• Charlotte Douglas (CLT) - 5% of one-stop connections
• Tampa (TPA) - 1% of one-stop connections

Atlanta Hartsfield-Jackson (ATL) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 37% on the Chicago to Washington, D.C. Dulles Intl Airport route. Wednesday is the cheapest departure day at $309 round-trip on average, while Monday is the most expensive at $487, a difference of $178. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Chicago to Washington, D.C. Dulles Intl Airport route, 17% of flights were delayed in the past 3 months, with delays averaging 1 hour 50 minutes.

Morning is the busiest departure period on Chicago to Washington, D.C. Dulles Intl Airport flights, with 43% of flights leaving in that window. Afternoon departures account for 29%, evening flights for 14%, and night flights for 14%.

Some of the most popular sights in Washington, D.C. Dulles Intl Airport are Walter E. Washington Convention Center, National Mall and Capital One Arena. These are among the most viewed places in Washington, D.C. Dulles Intl Airport on KAYAK.

These are the earliest and latest flight times available from Chicago to Washington, D.C. Dulles Intl Airport:

• Earliest: departs at 5:55 am and lands at 7:58 am
• Latest: departs at 11:55 pm and lands at 1:58 am.

The flight takes about 2h 03m.

Last-minute fares on this route - booked within 2 weeks of departure - run 77% above the route average of $347. Book 15 weeks before departure for the lowest fares.

A nonstop flight from Chicago to Washington, D.C. Dulles Intl Airport takes 2h 03m, covering 572 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $180 to $1,165. That means the highest observed fare was about 6x higher than the lowest one.

One-way fares from Chicago to Washington, D.C. Dulles Intl Airport are currently lower than usual. Average one-way flight prices are about $127, which is 42% below the typical average for this route.

Morning flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 4h 19m, compared with 5h 04m via Charlotte Douglas (CLT) and 7h 41m via Atlanta Hartsfield-Jackson (ATL).

Washington, D.C. Dulles Intl Airport is 1 hour ahead of Chicago (Eastern Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

Washington, D.C. Dulles Intl Airport (IAD) hosts 5 major car rental companies, with daily rates starting from around $24 for economy cars. Top options include:
· Dollar
· Budget
· Hertz
· Sixt
· Thrifty

Round-trip flights from Chicago to Washington, D.C. Dulles Intl Airport range from $278 to $482, with an average of $347 over the past 12 months. Anything below $278 counts as a good deal.