$95 Find Cheap Flights from St. Louis to Reagan Washington National Airport - Compare and Save

Among airlines operating St. Louis to Washington, D.C. Reagan-National Airport 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 St. Louis and Washington, D.C. Reagan-National Airport. The airlines offering nonstop flights on this route include:

• Southwest
• American Airlines

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

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.

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

• Economy Class
• Business Class
• First Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $211 round-trip via Denver Intl (DEN), compared to $353 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 St. Louis to Washington, D.C. Reagan-National Airport most commonly connect through:

• Denver Intl (DEN) - 71% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 12% of one-stop connections
• Chicago O'Hare Intl (ORD) - 12% of one-stop connections
• Charlotte Douglas (CLT) - 6% of one-stop connections

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

On the St. Louis to Washington, D.C. Reagan-National Airport route, being flexible with your departure day can save you up to 29%. Saturday is the cheapest day at $325 round-trip on average, while Sunday is the most expensive at $453: a $128 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

Morning is the busiest departure period on St. Louis to Washington, D.C. Reagan-National Airport flights, with 51% of flights leaving in that window. Afternoon departures account for 33%, evening flights for 16%, and night flights for 0%.

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

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

• Earliest: departs at 6:00 am and lands at 8:03 am
• Latest: departs at 8:00 pm and lands at 10:03 pm.

The flight takes about 2h 03m.

Last-minute fares on this route - booked within 2 weeks of departure - run 91% above the route average of $352. Book 22 weeks before departure for the lowest fares.

A nonstop flight from St. Louis to Washington, D.C. Reagan-National Airport takes 2h 03m, 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.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $237 to $1,526. That means the highest observed fare was about 6x higher than the lowest one.

One-way fares from St. Louis to Washington, D.C. Reagan-National Airport are currently lower than usual. Average one-way flight prices are about $109, which is 57% below the typical average for this route.

Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 4h 08m, compared with 5h 02m via Chicago O'Hare Intl (ORD) and 7h 59m via Charlotte Douglas (CLT).

Washington, D.C. Reagan-National 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.

Washington, D.C. Reagan-National Airport (DCA) hosts 5 major car rental companies, with daily rates starting from around $23 for economy cars. Top options include:
• Sixt
• Dollar
• Thrifty
• Alamo
• Budget

Round-trip flights from St. Louis to Washington, D.C. Reagan-National Airport range from $295 to $466, with an average of $352 over the past 12 months. Anything below $295 counts as a good deal.

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