$128 Find Cheap Flights from Reagan Washington National Airport to St. Louis - Compare and Save

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.

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

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).

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 travelers should check the fare details before booking.

Only Economy Class is available on flights from Washington, D.C. Reagan-National Airport to St. Louis.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $282 round-trip via Denver Intl (DEN), compared to $364 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.

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

• Denver Intl (DEN) - 55% of one-stop connections
• Chicago O'Hare Intl (ORD) - 18% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 9% of one-stop connections
• Chicago Midway (MDW) - 9% of one-stop connections

Denver Intl (DEN) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 24% on the Washington, D.C. Reagan-National Airport to St. Louis route. Wednesday is the cheapest departure day at $317 round-trip on average, while Sunday is the most expensive at $416, a difference of $99. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

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%.

Some of the most popular sights in St. Louis are Downtown St. Louis, Busch Stadium and Enterprise Center. These are among the most viewed places in St. Louis on KAYAK.

A nonstop flight from Washington, D.C. Reagan-National Airport to St. Louis takes 2h 28m, covering 717 miles.

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

• Earliest: departs at 8:00 am and lands at 10:28 am
• Latest: departs at 8:00 pm and lands at 10:28 pm.

The flight takes about 2h 28m.

Last-minute fares on this route - booked within 2 weeks of departure - run 100% above the route average of $363. Book 22 weeks before departure for the lowest fares.

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 $237 to $1,496. That means the highest observed fare was about 6x higher than the lowest one.

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 $132, which is 45% below the typical average for this route.

Flying via Atlanta Hartsfield-Jackson (ATL) gives the shortest average 1-stop total travel time at 4h 33m, compared with 4h 41m via Chicago Midway (MDW) and 5h 15m via Chicago O'Hare Intl (ORD).

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.

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

Round-trip flights from Washington, D.C. Reagan-National Airport to St. Louis range from $302 to $493, with an average of $363 over the past 12 months. Anything below $302 counts as a good deal.

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.