$94 Find Cheap Flights from Reagan Washington National Airport to St. Louis - Compare and Save

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

• Earliest: departs at 7:25 am and lands at 9:58 am
• Latest: departs at 8:03 pm and lands at 10:36 pm.

The flight takes about 2h 33m.

Two cabin classes are available on flights from Washington, D.C. Reagan-National Airport to St. Louis:

• Economy Class
• First Class

A nonstop flight from Washington, D.C. Reagan-National Airport to St. Louis takes 2h 33m, covering 717 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. Reagan-National Airport to St. Louis range from $305 to $502, with an average of $369 over the past 12 months. Anything below $305 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 89% above the $369 route average. Book 22 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $176 round-trip via Detroit Metropolitan Wayne County (DTW), compared to $369 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 737 MAX 8 family is used most often on this route, operated mainly by Southwest. Other aircraft seen on the route include Embraer 175 variants.

Afternoon is the busiest departure period on Washington, D.C. Reagan-National Airport to St. Louis flights, with 43% of flights leaving in that window. Morning departures account for 29%, evening flights for 28%, 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 $241 to $1,764. That means the highest observed fare was about 7x higher than the lowest one.

American Airlines is the only airline on the Washington, D.C. Reagan-National Airport to St. Louis route offering in-flight Wi-Fi. Pricing depends on fare class.

One-way fares from Washington, D.C. Reagan-National Airport to St. Louis are currently lower than usual. Average one-way flight prices are about $107, which is 57% below the typical average for this route.

Lambert-St Louis Airport (STL) hosts 5 major car rental companies, with daily rates starting from around $31 for economy cars. Top options include:

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

Flights from Washington, D.C. Reagan-National Airport to St. Louis usually depart from Washington, D.C. Reagan-National (DCA) and arrive at Lambert-St Louis (STL).

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

• Denver Intl (DEN) - 41% of one-stop connections
• Chicago O'Hare Intl (ORD) - 41% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 5% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 5% of one-stop connections

Yes. Flexible dates can save you up to 25% on flights from Washington, D.C. Reagan-National Airport to St. Louis. Wednesday is the cheapest departure day at $330 round-trip on average, while Sunday is the most expensive at $438, a difference of $108.

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

2 airlines operate flights between Washington, D.C. Reagan-National Airport and St. Louis. The airlines offering nonstop flights on this route include:

• Southwest
• American Airlines

Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 4h 10m, compared with 4h 33m via Atlanta Hartsfield-Jackson (ATL) and 4h 41m via Chicago Midway (MDW).

St. Louis is 1 hour behind Washington, D.C. Reagan-National 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. Reagan-National Airport to St. Louis flights:

• Southwest: offers free seat selection
• American Airlines: offers extra legroom; 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:

• Southwest: a cabin bag and a checked bag in Economy Class
• American Airlines: a cabin bag and a checked bag in Economy 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.