Cheap Flights from St. Louis (SUS) to Washington (DCA)

Popular airlines from St. Louis, MO (SUS-Spirit of St. Louis) to Ronald Reagan Washington National Airport (DCA)

Frequently asked questions

How much does a flight from Spirit of St. Louis Airport (SUS) to Ronald Reagan Washington National Airport (DCA) cost?
Grab a cheap one-way flight or cheap return flight from Spirit of St. Louis Airport (SUS) to Ronald Reagan Washington National Airport (DCA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Spirit of St. Louis Airport (SUS) to Ronald Reagan Washington National Airport (DCA)?
is the cheapest month to fly from SUS to DCA. Planning your trip for the off-season is often the key to finding a great deal.
Which airlines fly direct from Spirit of St. Louis Airport (SUS) to Ronald Reagan Washington National Airport (DCA)?
While St. Louis, MO (SUS-Spirit of St. Louis) has no direct flights to Ronald Reagan Washington National Airport (DCA), other airports have nonstop options. Leaving from Lambert-St. Louis Intl. Airport (STL) will get you to Washington without any detours.
What is the cheapest airline that flies from Spirit of St. Louis Airport (SUS) to Ronald Reagan Washington National Airport (DCA)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll take you from SUS to DCA. Then, sort your results by "Price (lowest to highest)" to snag the best deal available.
How many flights per day from Spirit of St. Louis Airport (SUS) to Ronald Reagan Washington National Airport (DCA)?
Nonstop flights from Spirit of St. Louis Airport (SUS) to Ronald Reagan Washington National Airport (DCA) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SUS to DCA?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can change based on a number of factors, such as the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Spirit of St. Louis Airport (SUS) to Ronald Reagan Washington National Airport (DCA)?
Choose a flight from Spirit of St. Louis Airport (SUS) to Ronald Reagan Washington National Airport (DCA) that leaves before 3 PM to reduce the likelihood of delays. Later departures have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Spirit of St. Louis Airport (SUS) to Ronald Reagan Washington National Airport (DCA) last-minute?
Holding off until just before your departure to book a flight from SUS to DCA generally means paying more. While you may come across some last-minute discounts, they aren't always guaranteed. Be flexible with your travel plans to maximize your chances of scoring a bargain.
Is it cheaper to book a SUS to DCA flight and hotel package?
Compared with arranging flights and hotels separately, booking a SUS to DCA flight and hotel package with Expedia could lead to significant savings. What's more, having it all in one place takes the hassle out of planning your trip. Simply pick your flights and choose from our wide range of hotels, then tailor your trip with other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Spirit of St. Louis Airport (SUS) to Ronald Reagan Washington National Airport (DCA)?
Typically, you're able to reschedule or cancel your SUS to DCA flight. However, additional charges may apply, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you'd like more information, head to our Customer Service portal.

Travel information

Travel information

Origin airport
Spirit of St. Louis
Destination airport
Ronald Reagan Washington National
Distance
732 mi

Book with confidence

Book with confidence

St. Louis to Washington Flights

The cheapest times to fly from St. Louis to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Washington are during the month of . You can find some of the cheapest flights from St. Louis to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Washington

Sunday is one of the best days to book for cheap flights from St. Louis to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Washington Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.