$100 Find Cheap Flights from St. Louis to Reagan Washington National Airport - Compare and Save

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 8:01 am
• Latest: departs at 8:00 pm and lands at 10:01 pm.

The flight takes about 2h 01m.

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

• Economy Class
• Business Class
• First Class

A nonstop flight from St. Louis to Washington, D.C. Reagan-National Airport takes 2h 01m, 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 St. Louis to Washington, D.C. Reagan-National Airport range from $298 to $486, with an average of $358 over the past 12 months. Anything below $298 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 81% above the $358 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 $204 round-trip via Denver Intl (DEN), compared to $359 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 Embraer 175 family is used most often on this route, operated mainly by American Airlines. Other aircraft seen on the route include Boeing 737 MAX 8 variants.

Morning is the busiest departure period on St. Louis to Washington, D.C. Reagan-National Airport flights, with 43% of flights leaving in that window. Afternoon departures account for 43%, evening flights for 14%, 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 $251 to $1,375. That means the highest observed fare was about 5x higher than the lowest one.

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.

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 $113, which is 55% below the typical average for this route.

Washington, D.C. Reagan-National Airport (DCA) hosts 5 major car rental companies, with daily rates starting from around $24 for economy cars. Top options include:

• Sixt
• Dollar
• Thrifty
• Hertz
• Alamo

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).

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

• Denver Intl (DEN) - 57% of one-stop connections
• Chicago O'Hare Intl (ORD) - 29% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 14% of one-stop connections

Yes. Flexible dates can save you up to 33% on flights from St. Louis to Washington, D.C. Reagan-National Airport. Saturday is the cheapest departure day at $324 round-trip on average, while Sunday is the most expensive at $478, a difference of $154.

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

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

Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 4h 06m, compared with 4h 49m via Chicago O'Hare Intl (ORD) and 20h 13m via Denver Intl (DEN).

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.

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.

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.

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.