$67 Find Cheap Flights from St. Louis to Washington Dulles Airport - Compare and Save

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

• Earliest: departs at 8:00 am and lands at 10:09 am
• Latest: departs at 1:25 pm and lands at 3:34 pm.

The flight takes about 2h 09m.

Two cabin classes are available on flights from St. Louis to Washington, D.C. Dulles Intl Airport:

• Economy Class
• First Class

A nonstop flight from St. Louis to Washington, D.C. Dulles Intl Airport takes 2h 09m, covering 694 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.

Round-trip flights from St. Louis to Washington, D.C. Dulles Intl Airport range from $298 to $515, with an average of $380 over the past 12 months. Anything below $298 counts as a good deal.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $252 round-trip via Atlanta Hartsfield-Jackson (ATL), compared to $476 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.

The Canadair (Bombardier) Regional Jet CRJ-550 family is used most often on this route, operated mainly by United Airlines. Other aircraft seen on the route include Embraer 175 (Enhanced Winglets) variants.

Morning is the busiest departure period on St. Louis to Washington, D.C. Dulles Intl Airport flights, with 50% of flights leaving in that window. Afternoon departures account for 50%, evening flights for 0%, and night flights for 0%.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $258 to $2,226. That means the highest observed fare was about 9x higher than the lowest one.

JetBlue is the only airline on the St. Louis to Washington, D.C. Dulles Intl Airport route offering in-flight Wi-Fi. Pricing depends on fare class.

One-way fares from St. Louis to Washington, D.C. Dulles Intl Airport are currently lower than usual. Average one-way flight prices are about $142, which is 37% below the typical average for this route.

Washington, D.C. Dulles Intl Airport (IAD) hosts 5 major car rental companies, with daily rates averaging $70 for economy cars. Top options include:

• Dollar
• Hertz
• Budget
• Sixt
• Thrifty

Flights from St. Louis to Washington, D.C. Dulles Intl Airport usually depart from Lambert-St Louis (STL) and arrive at Washington, D.C. Dulles Intl (IAD).

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

• Atlanta Hartsfield-Jackson (ATL) - 64% of one-stop connections
• Charlotte Douglas (CLT) - 17% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 10% of one-stop connections
• Chicago O'Hare Intl (ORD) - 5% of one-stop connections

Yes. Flexible dates can save you up to 38% on flights from St. Louis to Washington, D.C. Dulles Intl Airport. Thursday is the cheapest departure day at $301 round-trip on average, while Tuesday is the most expensive at $484, a difference of $183.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

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

Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 4h 29m, compared with 4h 39m via Charlotte Douglas (CLT) and 4h 53m via Chicago O'Hare Intl (ORD).

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

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.

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

• United Airlines: offers free seat selection

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

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 First Class
• JetBlue: a cabin bag in Economy Class class

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