How popular is this Washington, D.C. to St. Louis flight route?

Within the past month, 7 users have taken a look at flights from Washington, D.C. to Lambert-St Louis.

What are the cheapest airlines flying from Washington, D.C. to St. Louis round-trip?

Our cheapest airline available from Washington, D.C. to St. Louis is Spirit Airlines. Our recent data shows that you can find tickets from as low as $195 on this airline. Additional options worth looking into are Frontier and United Airlines, starting at $200 and $214 round-trip. These flights start at 40% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from Washington, D.C. to St. Louis one-way?

To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $80. United Airlines flights start at $86 while deals on American Airlines start at $90 one-way.

What are the most popular routes from Washington, D.C. to St. Louis?

When deciding which route to take from Washington, D.C. to St. Louis consider Washington, D.C. Dulles Intl - Lambert-St Louis, Washington, D.C. Reagan-National - Lambert-St Louis or Baltimore/Washington - Lambert-St Louis as they are the most popular.

What are the cheapest flights from Washington, D.C. to St. Louis?

The cheapest flight price from Washington, D.C. to St. Louis is $88. On average you can expect to pay $274. The most popular route, (Washington, D.C. Dulles Intl - Lambert-St Louis), can usually be booked for $189.

What are the most popular airlines that fly from Washington, D.C. to St. Louis?

When booking a flight from Washington, D.C. to St. Louis, you may want to consider flying on American Airlines, Delta or Frontier as they are the most popular for this route.

What is the cheapest day to fly round-trip from Washington, D.C. to St. Louis?

Saturday flights are found to be more expensive to fly from Washington, D.C. to St. Louis. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to St. Louis.

How far in advance should I book a flight from Washington, D.C. to St. Louis?

Find a great deal and save up to 169% by booking at least 59 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Washington, D.C. to St. Louis within the next two weeks, with the cheapest ticket starting at $414.

What is the cheapest month to fly from Washington, D.C. to St. Louis?

The best pricing can be found in the month of August. Prices to St. Louis from Washington, D.C. average $327. You can even find prices in August for less than $327, as users have found deals to St. Louis from as low as $185. The month of March appears to be one of the more expensive times to travel to St. Louis from Washington, D.C.. Flying in the targeted month can save you up to 15%.

Most accurate provider : When it comes to deals on Washington, D.C.-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-St. Louis flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Washington, D.C.-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly into for flights to St. Louis from Washington, D.C.?

Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. to St. Louis. 5 airlines have flights to Lambert-St Louis from Washington, D.C. on a regular basis. Booking flights from Washington, D.C. to Lambert-St Louis should not be difficult; the airport handles an average of 13 inbound flights from Washington, D.C. per day.

Can I find deals for flights from Washington, D.C. to St. Louis that include hotel bookings?

Yes. In addition to deals on Washington, D.C. to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Washington, D.C. to St. Louis?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to St. Louis.

Can I find deals for business class flights from Washington, D.C. to St. Louis?

Yes. Cheapflights offers flight deals from Washington, D.C. to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$80+ Flights from Washington, D.C. to St. Louis

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Washington, D.C. to Lambert-St Louis are usually found in August or May, booked 89 days in advance, depart on a Wednesday or Friday and return on a Friday

Cheap flight deals from Washington, D.C. to St. Louis

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$195 (Mytrip)
One-way from	$80 (Mytrip)
Popular in	March
Cheapest in	August
Average price	$308
Good round-trip deal	$265 or less
Good one-way deal	$108 or less

Provider with most accurate pricing for Washington, D.C. (WAS)-Lambert-St Louis flight deals.

Search Deals

Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Lambert-St Louis flights.

Search Deals

From Washington, D.C. (WAS) to Lambert-St Louis

Search Deals

One-way flight from Washington, D.C. (WAS) to Lambert-St Louis

Search Deals

Highest demand for flights based on searches. 6% potential increase in price ($24 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from Washington, D.C. (WAS) to Lambert-St Louis.

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Price to beat on a one-way flight from Washington, D.C. (WAS) to Lambert-St Louis.

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Find flight deals from Washington, D.C. to St. Louis

Cheapest flights from Washington, D.C. to St. Louis
Explore the most affordable flight options available from Washington, D.C. to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 4, 2025.

Thu 6/122:08 pmBWI - STL

1 stop26h 14mSpirit Airlines

Mon 6/164:17 pmSTL - BWI

2 stops13h 53mSpirit Airlines

Deal found 4/4

$195

Fri 5/96:12 pmBWI - STL

1 stop16h 47mFrontier

Mon 5/125:45 pmSTL - BWI

1 stop21h 12mFrontier

Deal found 4/3

$200

Sat 5/39:21 pmBWI - STL

1 stop27h 45mMultiple Airlines

Sat 5/1010:10 amSTL - BWI

1 stop7h 42mMultiple Airlines

Deal found 4/2

$208

Fri 5/95:26 pmIAD - STL

1 stop7h 48mFrontier

Sat 5/105:45 pmSTL - IAD

1 stop21h 51mFrontier

Deal found 4/4

$210

Thu 5/17:00 amDCA - STL

1 stop9h 07mFrontier

Fri 5/26:53 pmSTL - DCA

1 stop16h 14mFrontier

Deal found 4/4

$210

Wed 5/283:40 pmIAD - STL

1 stop6h 45mUnited Airlines

Sat 5/318:05 amSTL - IAD

1 stop5h 23mUnited Airlines

Deal found 4/4

$214

Thu 5/226:05 amDCA - STL

1 stop6h 40mSouthwest

Sun 5/258:00 pmSTL - DCA

Nonstop2h 00mSouthwest

Deal found 4/3

$214

Thu 5/298:15 amDCA - STL

Nonstop2h 27mAmerican Airlines

Tue 6/31:38 pmSTL - DCA

1 stop4h 18mAmerican Airlines

Deal found 4/4

$223

Sun 4/206:00 amDCA - STL

1 stop4h 28mDelta

Sat 4/2612:47 pmSTL - DCA

1 stop4h 43mDelta

Deal found 4/3

$224

Wed 5/2811:19 amBWI - STL

1 stop5h 11mUnited Airlines

Thu 5/295:00 amSTL - BWI

1 stop4h 13mUnited Airlines

Deal found 4/4

$227

Thu 9/1812:23 pmBWI - STL

1 stop24h 06mSun Country Air

Sun 9/217:34 amSTL - BWI

1 stop8h 07mSun Country Air

Deal found 4/4

$245

Thu 5/16:00 amIAD - STL

1 stop4h 36mDelta

Fri 5/27:01 pmSTL - IAD

1 stop4h 27mDelta

Deal found 4/4

$249

Best flights from Washington, D.C. to St. Louis
Discover carefully curated flight deals from Washington, D.C. to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 4, 2025.

Thu 6/122:08 pmBWI - STL

1 stop26h 14mSpirit Airlines

Mon 6/164:17 pmSTL - BWI

2 stops13h 53mSpirit Airlines

Deal found 4/4

$195

Fri 5/96:12 pmBWI - STL

1 stop16h 47mFrontier

Mon 5/125:45 pmSTL - BWI

1 stop21h 12mFrontier

Deal found 4/3

$200

Sat 5/39:21 pmBWI - STL

1 stop27h 45mMultiple Airlines

Sat 5/1010:10 amSTL - BWI

1 stop7h 42mMultiple Airlines

Deal found 4/2

$208

Wed 5/283:40 pmIAD - STL

1 stop6h 45mUnited Airlines

Sat 5/318:05 amSTL - IAD

1 stop5h 23mUnited Airlines

Deal found 4/4

$214

Thu 5/226:05 amDCA - STL

1 stop6h 40mSouthwest

Sun 5/258:00 pmSTL - DCA

Nonstop2h 00mSouthwest

Deal found 4/3

$214

Thu 5/298:15 amDCA - STL

Nonstop2h 27mAmerican Airlines

Tue 6/31:38 pmSTL - DCA

1 stop4h 18mAmerican Airlines

Deal found 4/4

$223

Sun 4/206:00 amDCA - STL

1 stop4h 28mDelta

Sat 4/2612:47 pmSTL - DCA

1 stop4h 43mDelta

Deal found 4/3

$224

Thu 9/1812:23 pmBWI - STL

1 stop24h 06mSun Country Air

Sun 9/217:34 amSTL - BWI

1 stop8h 07mSun Country Air

Deal found 4/4

$245

Fri 5/95:26 pmIAD - STL

1 stop7h 48mFrontier

Sat 5/105:45 pmSTL - IAD

1 stop21h 51mFrontier

Deal found 4/4

$210

Wed 5/2811:19 amBWI - STL

1 stop5h 11mUnited Airlines

Thu 5/295:00 amSTL - BWI

1 stop4h 13mUnited Airlines

Deal found 4/4

$227

Thu 5/17:00 amDCA - STL

1 stop9h 07mFrontier

Fri 5/26:53 pmSTL - DCA

1 stop16h 14mFrontier

Deal found 4/4

$210

Thu 5/16:00 amIAD - STL

1 stop4h 36mDelta

Sun 5/47:01 pmSTL - IAD

1 stop4h 27mDelta

Deal found 4/4

$249

Last-minute flights from Washington, D.C. to St. Louis
Discover last-minute flight deals from Washington, D.C. to St. Louis. Data last updated April 4, 2025 and is based on user searches.

Wed 4/95:52 pmIAD - STL

1 stop6h 54mFrontier

Mon 4/144:57 pmSTL - IAD

1 stop14h 48mFrontier

Deal found 4/3

$261

Wed 4/99:15 amBWI - STL

1 stop15h 31mFrontier

Mon 4/144:57 pmSTL - BWI

1 stop21h 00mFrontier

Deal found 4/3

$261

Thu 4/107:00 amDCA - STL

1 stop27h 06mFrontier

Fri 4/116:51 pmSTL - DCA

1 stop26h 08mFrontier

Deal found 4/3

$280

Thu 4/1011:57 amIAD - STL

3 stops31h 44mMultiple Airlines

Sat 4/126:45 pmSTL - IAD

1 stop15h 05mMultiple Airlines

Deal found 4/4

$538

Fri 4/114:19 pmBWI - STL

3 stops44h 51mMultiple Airlines

Mon 4/144:57 pmSTL - BWI

1 stop15h 38mMultiple Airlines

Deal found 4/3

$424

Sun 4/139:05 pmDCA - STL

Nonstop2h 20mAmerican Airlines

Sun 4/206:13 amSTL - DCA

Nonstop2h 01mAmerican Airlines

Deal found 4/4

$444

Mon 4/149:30 amDCA - STL

1 stop3h 50mSouthwest

Thu 4/171:15 pmSTL - DCA

Nonstop2h 05mSouthwest

Deal found 4/3

$455

Mon 4/1411:00 amDCA - STL

1 stop4h 46mDelta

Fri 4/185:32 pmSTL - DCA

1 stop5h 07mDelta

Deal found 4/4

$469

Mon 4/149:32 pmBWI - STL

1 stop20h 43mSpirit Airlines

Thu 4/176:10 pmSTL - BWI

2 stops22h 23mSpirit Airlines

Deal found 4/3

$473

Mon 4/1412:29 pmIAD - STL

1 stop6h 27mDelta

Fri 4/184:05 pmSTL - IAD

1 stop4h 18mDelta

Deal found 4/4

$499

Mon 4/149:30 pmBWI - STL

Nonstop2h 15mSouthwest

Thu 4/179:10 pmSTL - BWI

Nonstop2h 00mSouthwest

Deal found 4/3

$527

Mon 4/1410:10 pmIAD - STL

2 stops18h 37mUnited Airlines

Thu 4/176:30 amSTL - IAD

1 stop4h 14mUnited Airlines

Deal found 4/3

$587

One-way flights from Washington, D.C. to St. Louis
Search for one-way flight options from Washington, D.C. to St. Louis. Find affordable one-way fares based on user searches. Data last updated April 4, 2025.

Thu 6/122:08 pmBWI - STL

1 stop26h 14mSpirit Airlines

Deal found 4/4

$80

Tue 5/1310:50 amBWI - STL

1 stop4h 57mUnited Airlines

Deal found 4/4

$86

Sun 5/258:40 amIAD - STL

Nonstop2h 16mUnited Airlines

Deal found 4/4

$90

Sat 5/2410:20 amDCA - STL

Nonstop2h 32mAmerican Airlines

Deal found 4/3

$90

Sat 7/52:00 pmDCA - STL

1 stop3h 25mSouthwest

Deal found 4/4

$95

Thu 5/155:26 pmIAD - STL

1 stop7h 40mFrontier

Deal found 4/4

$96

Wed 4/3012:00 pmBWI - STL

1 stop4h 12mDelta

Deal found 4/2

$99

Sun 5/256:25 amDCA - STL

1 stop5h 20mUnited Airlines

Deal found 4/4

$100

Thu 5/159:16 pmBWI - STL

1 stop27h 58mFrontier

Deal found 4/3

$106

Tue 5/136:00 pmDCA - STL

1 stop16h 59mFrontier

Deal found 4/3

$106

Thu 5/158:10 amBWI - STL

2 stops28h 35mMultiple Airlines

Deal found 4/3

$121

Sun 6/1511:52 amIAD - STL

2 stops28h 30mMultiple Airlines

Deal found 4/4

$128

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Thu 6/12

2:08 pm-3:22 pm

1 stop26h 14m

Lambert-St Louis

Mon 6/16

4:17 pm-7:10 am

2 stops13h 53m

$195

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Fri 5/9

6:12 pm-9:59 am

1 stop16h 47m

Lambert-St Louis

Mon 5/12

5:45 pm-3:57 pm

1 stop21h 12m

$200

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Sat 5/3

9:21 pm-12:06 am

1 stop27h 45m

Lambert-St Louis

Sat 5/10

10:10 am-6:52 pm

1 stop7h 42m

$208

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Fri 5/9

5:26 pm-12:14 am

1 stop7h 48m

Lambert-St Louis

Sat 5/10

5:45 pm-4:36 pm

1 stop21h 51m

$210

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 5/1

7:00 am-3:07 pm

1 stop9h 07m

Lambert-St Louis

Fri 5/2

6:53 pm-12:07 pm

1 stop16h 14m

$210

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Wed 5/28

8:40 am-9:56 am

Nonstop2h 16m

Lambert-St Louis

Sun 6/1

5:27 pm-12:30 am

1 stop6h 03m

$214

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 5/22

6:05 am-11:45 am

1 stop6h 40m

Lambert-St Louis

Sun 5/25

8:00 pm-11:00 pm

Nonstop2h 00m

$214

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 5/29

8:15 am-9:42 am

Nonstop2h 27m

Lambert-St Louis

Tue 6/3

1:38 pm-6:56 pm

1 stop4h 18m

$223

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Sun 4/20

6:00 am-9:45 am

1 stop4h 45m

Lambert-St Louis

Fri 4/25

5:37 pm-11:10 pm

1 stop4h 33m

$224

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Wed 5/28

11:19 am-3:30 pm

1 stop5h 11m

Lambert-St Louis

Thu 5/29

5:00 am-10:13 am

1 stop4h 13m

$227

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/4

Showing 1-10 of 38 results

Compare providers for flights from Washington, D.C. to St. Louis

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to St. Louis in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Washington, D.C.-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-St. Louis flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Washington, D.C.-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Washington, D.C. to St. Louis flights

Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. to St. Louis trip

Airports

DCA

For a stress-free departure from DCA, use the Metro's Yellow or Blue lines for easy access. It's affordable and avoids traffic hassles.

STL

Use the MetroLink light rail for a convenient and economical trip from STL to downtown St. Louis, taking about 40 minutes.

Our travel experts

Emily Zemler

Expert on DCA

Taryn White

Expert on STL

Best time to book a flight from Washington, D.C. to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Washington, D.C. with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to St. Louis

How far ahead should I book a flight from Washington, D.C. to St. Louis?

To ensure you get the cheapest price possible for a flight from Washington, D.C. to St. Louis, you should look to book at least 89 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Washington, D.C. to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. to St. Louis (average of $311). Flying from Washington, D.C. to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WAS to STL?

It’s optimal to fly from Washington, D.C. to St. Louis at noon. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Washington, D.C. to St. Louis?

Travelers seeking maximum savings on their Washington, D.C. to St. Louis flight should consider departing on Saturday at noon when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Washington, D.C. to St. Louis

The most flights from WAS to STL are scheduled on a Monday (16 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (11 on average).

Rainfall in St. Louis by month

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

To help decide which airline to fly from Washington, D.C. to St. Louis, see what other customers have to say about Southwest, Delta and United Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,275 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Southwest

8.0

Very good

4,275 reviews

Southwest

8.0

Very good

4,275 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Delta

8.0

Very good

7,900 reviews

Southwest

8.0

Very good

4,275 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

United Airlines

7.4

Good

8,618 reviews

Southwest

8.0

Very good

4,275 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,275 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Sun Country Air

6.9

Okay

349 reviews

Southwest

8.0

Very good

4,275 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

What airport do you fly into for flights to St. Louis from Washington, D.C.?
Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. to St. Louis. 5 airlines have flights to Lambert-St Louis from Washington, D.C. on a regular basis. Booking flights from Washington, D.C. to Lambert-St Louis should not be difficult; the airport handles an average of 13 inbound flights from Washington, D.C. per day.
How popular is this Washington, D.C. to St. Louis flight route?
Within the past month, 7 users have taken a look at flights from Washington, D.C. to Lambert-St Louis.
What are the cheapest airlines flying from Washington, D.C. to St. Louis round-trip?
Our cheapest airline available from Washington, D.C. to St. Louis is Spirit Airlines. Our recent data shows that you can find tickets from as low as $195 on this airline. Additional options worth looking into are Frontier and United Airlines, starting at $200 and $214 round-trip. These flights start at 40% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Washington, D.C. to St. Louis one-way?
To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $80. United Airlines flights start at $86 while deals on American Airlines start at $90 one-way.
What are the most popular routes from Washington, D.C. to St. Louis?
When deciding which route to take from Washington, D.C. to St. Louis consider Washington, D.C. Dulles Intl - Lambert-St Louis, Washington, D.C. Reagan-National - Lambert-St Louis or Baltimore/Washington - Lambert-St Louis as they are the most popular.
What are the cheapest flights from Washington, D.C. to St. Louis?
The cheapest flight price from Washington, D.C. to St. Louis is $88. On average you can expect to pay $274. The most popular route, (Washington, D.C. Dulles Intl - Lambert-St Louis), can usually be booked for $189.
Can I find deals for flights from Washington, D.C. to St. Louis that include hotel bookings?
Yes. In addition to deals on Washington, D.C. to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Washington, D.C. to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to St. Louis.
Can I find deals for business class flights from Washington, D.C. to St. Louis?
Yes. Cheapflights offers flight deals from Washington, D.C. to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Washington, D.C. to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Washington, D.C. to St. Louis (average of $311). Flying from Washington, D.C. to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 5 airlines flying from Washington, D.C. to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$108	Average$215	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$168	Average$359	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$176	Average$319	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$197	Average$358	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$223	Average$453	FlexibilityNo cancel fee	On-time69%

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$80+ Cheap flights from Washington, D.C. (WAS) to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/12. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from Washington, D.C. to Lambert-St Louis are usually found in August or May, booked 89 days in advance, depart on a Wednesday or Friday and return on a Friday

Cheap flight deals from Washington, D.C. to St. Louis

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Cheapest flights from Washington, D.C. to St. LouisExplore the most affordable flight options available from Washington, D.C. to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 4, 2025.

Explore the most affordable flight options available from Washington, D.C. to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 4, 2025.

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Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to St. Louis in April.

The best insider tips for Washington, D.C. to St. Louis flights

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Best time to book a flight from Washington, D.C. to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Washington, D.C. with our price prediction graph.

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Everything you need to know about your flight from Washington, D.C. to St. Louis

How far ahead should I book a flight from Washington, D.C. to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to St. Louis. Price data was last updated on March 28, 2025.

What is the cheapest month to book a flight from Washington, D.C. to St. Louis?

What is the cheapest time of day to fly from WAS to STL?

Find hourly flight availability from Washington, D.C. to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 4, 2025.

What is the cheapest day to fly from Washington, D.C. to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to St. Louis. Price data was last updated on March 30, 2025.

Weekly flight availability from Washington, D.C. to St. Louis

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

Reviews of airlines servicing St. Louis

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to St. Louis from Washington, D.C.?

How popular is this Washington, D.C. to St. Louis flight route?

What are the cheapest airlines flying from Washington, D.C. to St. Louis round-trip?

What are the cheapest airlines to fly from Washington, D.C. to St. Louis one-way?

What are the most popular routes from Washington, D.C. to St. Louis?

What are the cheapest flights from Washington, D.C. to St. Louis?

Can I find deals for flights from Washington, D.C. to St. Louis that include hotel bookings?

How can I find direct flights from Washington, D.C. to St. Louis?

Can I find deals for business class flights from Washington, D.C. to St. Louis?

What is the cheapest month to book a flight from Washington, D.C. to St. Louis?

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Top 5 airlines flying from Washington, D.C. to St. Louis

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Cheapest flights from Washington, D.C. to St. Louis
Explore the most affordable flight options available from Washington, D.C. to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 4, 2025.