AED 473 Cheap flights from St Louis to Washington, D.C.

Compare St Louis to Washington, D.C. flight deals

Find the cheapest month or even day of the year to fly to Washington, D.C.

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Flight deals from St Louis to Washington, D.C.

Looking for a cheap last-minute deal or the best round-trip flight from St Louis to Washington, D.C.? Find the lowest prices on one-way and round-trip tickets right here.

Washington, D.C..AED 473 per passenger.Departing Tue, Jan 27, returning Sun, Feb 1.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from St Louis on Tue, Jan 27, arriving in Baltimore Washington International.Inbound indirect flight with Frontier Airlines, departing from Washington Dulles on Sun, Feb 1, arriving in St Louis.Price includes taxes and charges.From AED 473, select.

Washington, D.C..AED 486 per passenger.Departing Tue, Jan 13, returning Sun, Jan 18.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from St Louis on Tue, Jan 13, arriving in Baltimore Washington International.Inbound indirect flight with Frontier Airlines, departing from Washington Dulles on Sun, Jan 18, arriving in St Louis.Price includes taxes and charges.From AED 486, select.

Washington, D.C..AED 639 per passenger.Departing Thu, Dec 25, returning Sat, Jan 10.Round-trip flight with Frontier Airlines and Spirit Airlines.Outbound indirect flight with Frontier Airlines, departing from St Louis on Thu, Dec 25, arriving in Washington Dulles.Inbound indirect flight with Spirit Airlines, departing from Baltimore Washington International on Sat, Jan 10, arriving in St Louis.Price includes taxes and charges.From AED 639, select.

Washington, D.C..AED 650 per passenger.Departing Fri, Feb 6, returning Sun, Feb 8.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from St Louis on Fri, Feb 6, arriving in Washington Ronald Reagan.Inbound indirect flight with Frontier Airlines, departing from Washington Dulles on Sun, Feb 8, arriving in St Louis.Price includes taxes and charges.From AED 650, select.

Washington, D.C..AED 668 per passenger.Departing Thu, Apr 9, returning Mon, Apr 13.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from St Louis on Thu, Apr 9, arriving in Baltimore Washington International.Inbound indirect flight with Frontier Airlines, departing from Baltimore Washington International on Mon, Apr 13, arriving in St Louis.Price includes taxes and charges.From AED 668, select.

Washington, D.C..AED 734 per passenger.Departing Sat, Mar 7, returning Wed, Mar 11.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from St Louis on Sat, Mar 7, arriving in Washington Ronald Reagan.Inbound indirect flight with Frontier Airlines, departing from Baltimore Washington International on Wed, Mar 11, arriving in St Louis.Price includes taxes and charges.From AED 734, select.

Washington, D.C..AED 832 per passenger.Departing Sun, Jan 18, returning Tue, Jan 20.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from St Louis on Sun, Jan 18, arriving in Washington Ronald Reagan.Inbound direct flight with Southwest Airlines departing from Washington Ronald Reagan on Tue, Jan 20, arriving in St Louis.Price includes taxes and charges.From AED 832, select.

Washington, D.C..AED 918 per passenger.Departing Sat, Feb 28, returning Sun, Mar 8.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from St Louis on Sat, Feb 28, arriving in Baltimore Washington International.Inbound indirect flight with Frontier Airlines, departing from Baltimore Washington International on Sun, Mar 8, arriving in St Louis.Price includes taxes and charges.From AED 918, select.

Find the cheapest month to fly from St Louis to Washington, D.C.

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Washington, D.C. flights are currently cheapest in January.

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Direct flights from St Louis to Washington, D.C.

Alternative St Louis to Washington, D.C. routes

Looking for the cheapest, fastest or easiest route from St Louis to Washington, D.C.? You could fly into the following airports instead.

St Louis to Washington, D.C.: Flight information

The things to know before you go.

Cheapest flight found	AED 473
Cheapest month to fly	January
Average flight time	2 hrs, 5 mins
Most popular airline	Southwest Airlines
Average flights per week	145

Finding cheap flights from St Louis to Washington, D.C.: Frequently asked questions

How many airports are there in Washington, D.C.?

There are 5 airports in Washington, D.C.: Washington Ronald Reagan, Camp Springs Andrews AFB, Washington Dulles, Baltimore Washington International, and Manassas.

How much are round-trip flights from St Louis to Washington, D.C.?

The best price we found for a round-trip flight from St Louis to Washington, D.C. is AED 473. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from St Louis to Washington, D.C.?

2 hours and 5 minutes is the average flight time from St Louis to Washington, D.C..

Which airlines fly direct from St Louis to Washington, D.C.?

Southwest Airlines, American Airlines and PSA Airlines fly direct from St Louis to Washington, D.C..

How many flights are there a week from St Louis to Washington, D.C.?

There are 145 flights per week flying from St Louis to Washington, D.C., as of December 2025.

When is the cheapest time to fly from St Louis to Washington, D.C.?

The cheapest month to fly from St Louis to Washington, D.C. is usually January.

What's the cheapest airport to fly to in Washington, D.C.?

If you're flying from St Louis Airport, the cheapest airport near Washington, D.C. is Baltimore Washington International – which is 43.6 km away from the center of Washington, D.C.. We've found flights to this airport from AED 473.

Which upcoming date is cheapest to fly from St Louis Airport to Washington, D.C. on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Washington, D.C. on Tuesday, January 27, 2026.

Can I get a direct flight from St Louis Airport to Washington, D.C.?

Yes – the average flight time is 2 hours and 5 minutes.

How can I get the best flight deal from St Louis Airport to Washington, D.C.?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Washington, D.C. but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Washington, D.C.?

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Washington, D.C. is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in Washington, D.C.?

In December, the average temperature is usually around 2°C. July is typically the warmest month in Washington, D.C., when it usually averages around 31°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging -4°C. The rainiest month is September.

Which is the cheapest airline to fly with from St Louis Airport to Washington, D.C.?

Currently, Frontier Airlines and Southwest Airlines offer the cheapest flight tickets to Washington, D.C..

Flying from Lambert-St. Louis International Airport (STL) to Washington DC: what you need to know

Expect to be traveling for 2 hours 20 minutes. That's the average journey time for a direct flight from Lambert-St. Louis International Airport to Washington DC.
The timezone in Washington DC is UTC-4. The city is one hour ahead of St Louis, where Lambert-St. Louis International Airport is located.
Lambert-St. Louis International Airport (STL) to Ronald Reagan National Airport (DCA) is the most traveled route, with 34 weekly flights to choose from. If you have things to finalize before heading off, the last flight from STL to DCA is with Southwest Airlines at 20:50. Opt for the first departure operated by American Airlines at 05:12 if you want to fly out earlier.
To avoid rushing for your STL to Washington DC flight, leave enough time for things like baggage drop and finding your gate. Arriving two hours ahead of international departures and an hour before domestic flights is the general travel rule.
Planning to travel during a peak time like school or public holidays? Expect longer queues at check-in and security. To give yourself peace of mind, arrive up to four hours before international flights and two hours before domestic departures.
Begin your trip at STL and head straight to Washington DC without any layovers. When booking a direct Lambert-St. Louis International Airport to Washington DC ticket, these are your arrival options:
- Ronald Reagan National Airport (DCA)
- Washington Dulles International Airport (IAD)
- Baltimore/Wash International Thurgood Marshall Airport (BWI)
You'll have your pick of carriers that operate direct flights from Lambert-St. Louis International Airport to Washington DC. Get up and away with one of these:
STL is around 16 kilometers from central St Louis. If you're driving, ride-sharing or catching a cab from the center, it'll take you 20 minutes or so to get there, depending on traffic. If you're using public transport, expect the travel time to be around 35 minutes.
Have an early flight from Lambert-St. Louis International Airport to Washington DC? Avoid the hassle of rushing to the airport (and sneak in some extra snooze time) by choosing one of these stays near STL:
When it comes to Lambert-St. Louis International Airport's on-time performance, 78.04% of flights arrive within the scheduled time frame.
STL is located at 10701 Lambert International Blvd..

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Washington DC

The lowest price we've seen for a one-way Lambert-St. Louis International Airport to Washington DC flight is AED 233. The cheapest price for a return flight is AED 473. Keep in mind fares can change due to demand at the time of booking.
Get cheap flights from STL to Washington DC by booking two months ahead. Based on our research, that's the sweet spot for finding the biggest deals.
Plan your trip for June. That's the best month for scoring a bargain on Lambert-St. Louis International Airport to Washington DC tickets. If you have flexibility with your dates, use the 'Whole month' tool to find the lowest price across each month.
Save time looking for cheap flights from STL to Washington DC by creating a Price Alert. You'll get an email or notification on the app when a new low fare is offered.
Select your ideal arrival and departure times, airlines and number of stops with our filters. Then, sort the results for your flight from Lambert-St. Louis International Airport to Washington DC by 'Best,' 'Cheapest' or 'Fastest.'

Airports in Washington DC

Ronald Reagan National Airport (DCA)

Ronald Reagan National Airport (DCA) to central Washington DC takes about 15 minutes by car. The center is roughly 8 kilometers away.
Traveling to the center on public transport takes around 45 minutes.
Consider staying in a hotel near DCA if you have a late flight from Lambert-St. Louis International Airport to Washington DC. Select one of these accommodation options and make arrival day easier:
Say yes to new adventures by picking up a Ronald Reagan National Airport rental car. Grab a set of wheels from Thrifty, Sixt or Dollar to explore Washington DC and beyond.
Lock in the best rate by reserving your vehicle from Ronald Reagan National Airport around four weeks in advance of your flight from STL to Washington DC.
DCA is located at 1 Aviation Circle.

Washington Dulles International Airport (IAD)

Central Washington DC is about 56 kilometers from Washington Dulles International Airport (IAD). After your flight from Lambert-St. Louis International Airport to Washington DC has hit the runway and you've navigated your way to arrivals, the drive should take about 50 minutes.
The journey will take roughly 1 hour 10 minutes on public transport.
Hang up the 'Do not disturb' sign and rest at a hotel close to IAD. Here are a few options where you can settle in after your STL to Washington DC flight:
The quickest way to get to where you're going is with a Washington Dulles International Airport rental car. Pick up a set of wheels from Dollar, Thrifty or Sixt and hit the road in a heartbeat.
Get first dibs on the best options. Booking your ride from IAD one week in advance often means better prices and a wider range of vehicles.
The address for Washington Dulles International Airport is 1 Saarinen Circle.

Baltimore/Wash International Thurgood Marshall Airport (BWI)

Head to the city center after your flight from Lambert-St. Louis International Airport to Washington DC has landed. Central Washington DC is about 48 kilometers from Baltimore/Wash International Thurgood Marshall Airport (BWI) and takes roughly 50 minutes to reach by car.
If you go by public transport, the journey time is about 1 hour 30 minutes.
Enjoy an unhurried start to your break by choosing a hotel near BWI after your STL to Washington DC flight. Recover from your travel day or simply give yourself time to settle into a new destination at:
Start your journey without stressing over how to get to your destination with a Baltimore/Wash International Thurgood Marshall Airport rental car. Book your wheels with reliable suppliers here like Dollar, Thrifty and Budget.
Plan ahead and enjoy the payoff. Book your ride from BWI two weeks before your flight from Lambert-St. Louis International Airport to Washington DC for the best rates.

Best time to go to Washington DC

Before locking in your flights from Lambert-St. Louis International Airport to Washington DC, consider which time of year is best for you. High season in Washington DC offers a lively atmosphere and plenty of things to do, while the off-season means you'll get better hotel deals and fewer crowds.
When booking your Lambert-St. Louis International Airport to Washington DC flight ticket, think about the kind of weather forecast you're hoping for. July is the warmest month in Washington DC, with temperatures ranging from 19ºC (66ºF) to 33ºC (91ºF).
Look for cheap tickets from STL to Washington DC in January if you'd rather travel when it's cooler. Temperatures are at their lowest then, ranging between -6ºC (21ºF) and 10ºC (50ºF) on average.

More about Washington DC

When it comes to searching for somewhere to rest your head, you'll find the best stays in Washington DC right here. Browse these hotels after you've booked your flight from Lambert-St. Louis International Airport to Washington DC:
There are so many things to do and see in this city it can be tricky to know where to begin. The White House, White House Historical Association and National Mall are top sights which should be on every Washington DC itinerary.

Explore more of United States

New York is just one of the many cities in United States waiting to be explored once you've seen Washington DC. Around 322 kilometers away to the north-east, its top attractions include Statue of Liberty, Central Park and Empire State Building.
Philadelphia is another well-known destination in United States and is around 193 kilometers north-east of Washington DC. No journey is complete without dropping by Liberty Bell, Independence Hall and Philadelphia Museum of Art.