$49 Find Cheap Flights from Washington Dulles Airport to St. Louis - Compare and Save

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

• Earliest: departs at 8:30 am and lands at 11:04 am
• Latest: departs at 6:00 pm and lands at 8:34 pm.

The flight takes about 2h 34m.

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

• Economy Class
• First Class

A nonstop flight from Washington, D.C. Dulles Intl Airport to St. Louis takes 2h 34m, 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 Washington, D.C. Dulles Intl Airport to St. Louis range from $344 to $671, with an average of $479 over the past 12 months. Anything below $344 counts as a good deal.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $315 round-trip via Atlanta Hartsfield-Jackson (ATL), compared to $562 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 variants.

Morning is the busiest departure period on Washington, D.C. Dulles Intl Airport to St. Louis flights, with 50% of flights leaving in that window. Evening departures account for 50%, afternoon 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 $243 to $2,119. That means the highest observed fare was about 9x higher than the lowest one.

One-way fares from Washington, D.C. Dulles Intl Airport to St. Louis are currently lower than usual. Average one-way flight prices are about $110, which is 52% below the typical average for this route.

Lambert-St Louis Airport (STL) hosts 5 major car rental companies, with daily rates averaging $78 for economy cars. Top options include:

• Hertz
• Budget
• Alamo
• Enterprise Rent-A-Car
• Payless

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

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

• Atlanta Hartsfield-Jackson (ATL) - 51% of one-stop connections
• Chicago O'Hare Intl (ORD) - 22% of one-stop connections
• Charlotte Douglas (CLT) - 18% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 10% of one-stop connections

Yes. Flexible dates can save you up to 50% on flights from Washington, D.C. Dulles Intl Airport to St. Louis. Saturday is the cheapest departure day at $390 round-trip on average, while Monday is the most expensive at $768, a difference of $378.

Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

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

Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 4h 42m, compared with 4h 58m via Chicago O'Hare Intl (ORD) and 4h 58m via Charlotte Douglas (CLT).

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

Some of the most popular sights in St. Louis are Busch Stadium, Enterprise Center and America's Center Convention Complex. These are among the most viewed places in St. Louis on KAYAK.

Among airlines operating Washington, D.C. Dulles Intl Airport to St. Louis 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 Economy Class

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