What are the cheapest airlines to fly from District of Columbia to St. Louis one-way?

One-way options have recently been found by users for as low as $89 on United Airlines. Other airlines that offer cheap prices include Southwest from $89 and American Airlines from $90 one-way.

What are the cheapest flights from District of Columbia to St. Louis?

Looking at all options, your cheapest flight can be booked for $88. While the most popular route (Washington, D.C. Dulles Intl - Lambert-St Louis) can be booked for $197 on average our data indicates $384 when flying from District of Columbia to St. Louis.

What are the most reliable airlines from District of Columbia to St. Louis?

No one likes to see their flight delayed. When booking a flight from District of Columbia to St. Louis consider choosing GoJet (84%), Avianca (84%) or Copa Airlines (84%) as they are the most reliable in getting you off to your destination on time.

What are the most popular airlines that fly from District of Columbia to St. Louis?

American Airlines, Delta and United Airlines are the most popular airlines when flying from District of Columbia to St. Louis.

How far in advance should I book a flight from District of Columbia to St. Louis?

Find a great deal and save up to 192% 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 District of Columbia to St. Louis within the next two weeks, with the cheapest ticket starting at $414.

What is the cheapest month to fly from District of Columbia to St. Louis?

The best pricing can be found in the month of August. Prices to St. Louis from District of Columbia average $328. You can even find prices in August for less than $328, 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 District of Columbia. Flying in the targeted month can save you up to 15%.

What airport do you fly into for flights to St. Louis from District of Columbia?

Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to St. Louis from District of Columbia.

Can I find deals for flights from District of Columbia to St. Louis that include hotel bookings?

Yes. In addition to deals on District of Columbia to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from District of Columbia to St. Louis?

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

Can I find deals for business class flights from District of Columbia to St. Louis?

Yes. Cheapflights offers flight deals from District of Columbia 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.

$89+ Flights from District of Columbia to St. Louis

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Cheap flight deals from District of Columbia to St. Louis

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$207 (Southwest)
One-way from	$89 (United Airlines)
Popular in	March
Cheapest in	August
Average price	$379
Good round-trip deal	$277 or less
Good one-way deal	$149 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.

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From District of Columbia to Lambert-St Louis

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One-way flight from District of Columbia to Lambert-St Louis

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($25 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 March 2025

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Price to beat on a round-trip flight from District of Columbia to Lambert-St Louis.

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Price to beat on a one-way flight from District of Columbia to Lambert-St Louis.

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Find flight deals from District of Columbia to St. Louis

Cheapest flights from District of Columbia to St. Louis
Explore the most affordable flight options available from District of Columbia to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

Thu 4/178:00 amDCA - STL

Nonstop2h 10mSouthwest

Thu 4/2412:30 pmSTL - DCA

1 stop7h 20mSouthwest

Deal found 3/27

$207

Thu 5/85:26 pmIAD - STL

1 stop7h 40mFrontier

Sun 5/115:45 pmSTL - IAD

1 stop21h 51mFrontier

Deal found 3/27

$208

Sat 5/36:00 amIAD - STL

1 stop4h 47mDelta

Mon 5/57:01 pmSTL - IAD

1 stop4h 27mDelta

Deal found 3/28

$217

Sat 5/36:00 amDCA - STL

1 stop4h 28mDelta

Mon 5/54:05 pmSTL - DCA

1 stop6h 34mDelta

Deal found 3/28

$217

Tue 4/157:00 amDCA - STL

1 stop27h 06mFrontier

Wed 4/166:51 pmSTL - DCA

1 stop16h 13mFrontier

Deal found 3/27

$220

Thu 4/178:22 amDCA - STL

Nonstop2h 30mAmerican Airlines

Thu 4/2410:48 amSTL - DCA

Nonstop2h 02mAmerican Airlines

Deal found 3/27

$227

Tue 7/228:40 amIAD - STL

Nonstop2h 19mUnited Airlines

Thu 7/248:00 amSTL - IAD

1 stop4h 49mUnited Airlines

Deal found 3/27

$239

Mon 4/1412:00 pmDCA - STL

1 stop4h 47mUnited Airlines

Wed 4/235:35 pmSTL - DCA

1 stop4h 00mUnited Airlines

Deal found 3/26

$293

Fri 5/95:02 amIAD - STL

1 stop4h 54mAmerican Airlines

Tue 5/131:59 pmSTL - IAD

1 stop4h 33mAmerican Airlines

Deal found 3/28

$297

Thu 5/1512:49 pmIAD - STL

1 stop23h 48mMultiple Airlines

Sun 5/187:30 amSTL - IAD

3 stops36h 27mMultiple Airlines

Deal found 3/26

$375

Best flights from District of Columbia to St. Louis
Discover carefully curated flight deals from District of Columbia to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 28, 2025.

Thu 4/178:00 amDCA - STL

Nonstop2h 10mSouthwest

Thu 4/2412:30 pmSTL - DCA

1 stop7h 20mSouthwest

Deal found 3/27

$207

Thu 5/85:26 pmIAD - STL

1 stop7h 40mFrontier

Sun 5/115:45 pmSTL - IAD

1 stop21h 51mFrontier

Deal found 3/27

$208

Sat 5/36:00 amIAD - STL

1 stop4h 47mDelta

Mon 5/57:01 pmSTL - IAD

1 stop4h 27mDelta

Deal found 3/27

$217

Thu 4/178:22 amDCA - STL

Nonstop2h 30mAmerican Airlines

Thu 4/2410:48 amSTL - DCA

Nonstop2h 02mAmerican Airlines

Deal found 3/27

$227

Thu 5/18:30 amIAD - STL

1 stop7h 17mUnited Airlines

Tue 5/68:25 amSTL - IAD

Nonstop2h 09mUnited Airlines

Deal found 3/27

$257

Thu 5/1512:49 pmIAD - STL

1 stop23h 48mMultiple Airlines

Sun 5/187:30 amSTL - IAD

3 stops36h 27mMultiple Airlines

Deal found 3/26

$375

Mon 5/56:28 pmDCA - STL

1 stop6h 08mDelta

Fri 5/93:40 pmSTL - DCA

1 stop5h 01mDelta

Deal found 3/27

$217

Tue 4/157:00 amDCA - STL

1 stop27h 06mFrontier

Wed 4/166:51 pmSTL - DCA

1 stop16h 13mFrontier

Deal found 3/27

$220

Mon 4/1412:00 pmDCA - STL

1 stop4h 47mUnited Airlines

Wed 4/235:35 pmSTL - DCA

1 stop4h 00mUnited Airlines

Deal found 3/26

$293

Sat 5/315:02 amIAD - STL

1 stop4h 16mAmerican Airlines

Sat 5/316:47 pmSTL - IAD

1 stop4h 15mAmerican Airlines

Deal found 3/27

$297

Wed 4/165:55 pmDCA - STL

1 stop21h 20mAlaska Airlines

Fri 4/186:44 amSTL - DCA

1 stop14h 15mAlaska Airlines

Deal found 3/27

$722

Last-minute flights from District of Columbia to St. Louis
Discover last-minute flight deals from District of Columbia to St. Louis. Data last updated March 28, 2025 and is based on user searches.

Thu 4/310:30 amDCA - STL

1 stop5h 12mUnited Airlines

Mon 4/143:40 pmSTL - DCA

1 stop5h 55mUnited Airlines

Deal found 3/27

$538

Fri 4/46:00 pmDCA - STL

1 stop16h 06mFrontier

Mon 4/76:51 pmSTL - DCA

1 stop16h 13mFrontier

Deal found 3/26

$240

Sat 4/52:12 pmIAD - STL

2 stops7h 35mAmerican Airlines

Sun 4/69:18 amSTL - IAD

1 stop6h 04mAmerican Airlines

Deal found 3/27

$712

Mon 4/75:54 pmIAD - STL

1 stop6h 52mFrontier

Fri 4/114:57 pmSTL - IAD

1 stop18h 01mFrontier

Deal found 3/27

$238

Mon 4/78:22 amDCA - STL

Nonstop2h 30mAmerican Airlines

Thu 4/1010:48 amSTL - DCA

Nonstop2h 02mAmerican Airlines

Deal found 3/26

$449

Mon 4/74:05 pmDCA - STL

1 stop4h 55mSouthwest

Thu 4/108:05 amSTL - DCA

Nonstop2h 00mSouthwest

Deal found 3/26

$455

Mon 4/77:46 pmIAD - STL

1 stop4h 43mDelta

Fri 4/1110:30 amSTL - IAD

1 stop4h 48mDelta

Deal found 3/27

$469

Mon 4/72:40 pmDCA - STL

1 stop7h 11mDelta

Fri 4/113:30 pmSTL - DCA

1 stop6h 25mDelta

Deal found 3/27

$469

Mon 4/73:47 pmIAD - STL

1 stop8h 20mUnited Airlines

Fri 4/111:00 pmSTL - IAD

Nonstop2h 06mUnited Airlines

Deal found 3/27

$528

Mon 4/1412:00 pmDCA - STL

1 stop4h 47mUnited Airlines

Wed 4/235:35 pmSTL - DCA

1 stop4h 00mUnited Airlines

Deal found 3/26

$293

Mon 4/148:25 amIAD - STL

3 stops33h 50mMultiple Airlines

Thu 4/1712:15 pmSTL - IAD

3 stops22h 08mMultiple Airlines

Deal found 3/27

$408

Mon 4/146:22 pmIAD - STL

1 stop20h 53mAlaska Airlines

Tue 4/226:30 amSTL - IAD

1 stop16h 28mAlaska Airlines

Deal found 3/26

$782

One-way flights from District of Columbia to St. Louis
Search for one-way flight options from District of Columbia to St. Louis. Find affordable one-way fares based on user searches. Data last updated March 28, 2025.

Tue 4/298:35 amIAD - STL

Nonstop2h 23mUnited Airlines

Deal found 3/27

$89

Mon 4/213:00 pmDCA - STL

Nonstop2h 15mSouthwest

Deal found 3/27

$89

Tue 7/17:59 pmDCA - STL

Nonstop2h 20mAmerican Airlines

Deal found 3/27

$90

Mon 4/217:46 pmIAD - STL

1 stop4h 50mDelta

Deal found 3/27

$99

Mon 4/217:35 pmDCA - STL

1 stop5h 01mDelta

Deal found 3/28

$99

Thu 5/17:00 amDCA - STL

1 stop9h 07mFrontier

Deal found 3/27

$100

Wed 4/237:50 amIAD - STL

2 stops10h 55mSouthwest

Deal found 3/27

$104

Sat 4/266:20 amDCA - STL

1 stop7h 00mUnited Airlines

Deal found 3/27

$119

Sat 4/512:48 pmIAD - STL

1 stop11h 58mFrontier

Deal found 3/27

$126

Thu 5/1512:49 pmIAD - STL

1 stop23h 48mSun Country Air

Deal found 3/27

$128

Thu 5/155:02 amIAD - STL

1 stop4h 54mAmerican Airlines

Deal found 3/27

$134

Sun 6/111:54 amIAD - STL

2 stops7h 47mMultiple Airlines

Deal found 3/27

$186

Cheapflights Fare Finder

Use the filters below to find and compare flights from District of Columbia to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 4/17

8:00 am-9:10 am

Nonstop2h 10m

Lambert-St Louis

Thu 4/24

12:30 pm-8:50 pm

1 stop7h 20m

$207

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 5/8

5:26 pm-12:06 am

1 stop7h 40m

Lambert-St Louis

Sun 5/11

5:45 pm-4:36 pm

1 stop21h 51m

$208

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 5/3

6:00 am-9:47 am

1 stop4h 47m

Lambert-St Louis

Mon 5/5

7:01 pm-12:28 am

1 stop4h 27m

$217

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Sat 5/3

6:00 am-9:28 am

1 stop4h 28m

Lambert-St Louis

Mon 5/5

4:05 pm-11:39 pm

1 stop6h 34m

$217

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Tue 4/15

7:00 am-9:06 am

1 stop27h 06m

Lambert-St Louis

Wed 4/16

6:51 pm-12:04 pm

1 stop16h 13m

$220

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 4/17

8:22 am-9:52 am

Nonstop2h 30m

Lambert-St Louis

Thu 4/24

10:48 am-1:50 pm

Nonstop2h 02m

$227

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Tue 7/22

8:40 am-9:59 am

Nonstop2h 19m

Lambert-St Louis

Thu 7/24

8:00 am-1:49 pm

1 stop4h 49m

$239

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Mon 4/14

12:00 pm-3:47 pm

1 stop4h 47m

Lambert-St Louis

Wed 4/23

5:35 pm-10:35 pm

1 stop4h 00m

$293

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Fri 5/9

5:02 am-8:56 am

1 stop4h 54m

Lambert-St Louis

Tue 5/13

1:59 pm-7:32 pm

1 stop4h 33m

$297

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 5/15

12:49 pm-11:37 am

1 stop23h 48m

Lambert-St Louis

Sun 5/18

7:30 am-8:57 pm

3 stops36h 27m

$375

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 23 results

Best time to book a flight from District of Columbia to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from District of Columbia 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 District of Columbia to St. Louis

What is the cheapest month to book a flight from District of Columbia to St. Louis?

Currently, August is the cheapest month in which you can book a flight from District of Columbia to St. Louis (average of $311). Flying from District of Columbia 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 DC to STL?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from District of Columbia to St. Louis as you normally would.

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

See what other customers who have flown with Southwest, Alaska Airlines and Delta from District of Columbia to St. Louis have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.1

Very good

4,274 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

8.1

Very good

4,274 reviews

Southwest

8.1

Very good

4,274 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.

Alaska Airlines

8.0

Very good

9,798 reviews

Southwest

8.1

Very good

4,274 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

7,897 reviews

Southwest

8.1

Very good

4,274 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

8,603 reviews

Southwest

8.1

Very good

4,274 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

8.1

Very good

4,274 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 District of Columbia?
Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to St. Louis from District of Columbia.
What are the cheapest airlines to fly from District of Columbia to St. Louis one-way?
One-way options have recently been found by users for as low as $89 on United Airlines. Other airlines that offer cheap prices include Southwest from $89 and American Airlines from $90 one-way.
What are the most reliable airlines from District of Columbia to St. Louis?
No one likes to see their flight delayed. When booking a flight from District of Columbia to St. Louis consider choosing GoJet (84%), Avianca (84%) or Copa Airlines (84%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from District of Columbia to St. Louis?
Looking at all options, your cheapest flight can be booked for $88. While the most popular route (Washington, D.C. Dulles Intl - Lambert-St Louis) can be booked for $197 on average our data indicates $384 when flying from District of Columbia to St. Louis.
Can I find deals for flights from District of Columbia to St. Louis that include hotel bookings?
Yes. In addition to deals on District of Columbia to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from District of Columbia to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from District of Columbia to St. Louis.
Can I find deals for business class flights from District of Columbia to St. Louis?
Yes. Cheapflights offers flight deals from District of Columbia 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 District of Columbia to St. Louis?
Currently, August is the cheapest month in which you can book a flight from District of Columbia to St. Louis (average of $311). Flying from District of Columbia 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.

See more FAQs

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Top 6 airlines flying from District of Columbia to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$108	Average$202	FlexibilityNo cancel fee	On-time62%
Spirit Airlines	Cheapest$133	Average$189	FlexibilityNo cancel fee	On-time65%
American Airlines	Cheapest$168	Average$358	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$176	Average$331	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$200	Average$358	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$223	Average$455	FlexibilityNo cancel fee	On-time69%

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$89+ Cheap flights from District of Columbia 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from District of Columbia to St. Louis with Cheapflights

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Cheap flight deals from District of Columbia to St. Louis

Keep the following information in mind while searching for District of Columbia to St. Louis flight deals. Data was last updated March 28, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from District of Columbia to St. Louis

Cheapest flights from District of Columbia to St. LouisExplore the most affordable flight options available from District of Columbia to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

Explore the most affordable flight options available from District of Columbia to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from District of Columbia to St. Louis that are best for you.

Best time to book a flight from District of Columbia to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from District of Columbia with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from District of Columbia to St. Louis

What is the cheapest month to book a flight from District of Columbia to St. Louis?

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

Find hourly flight availability from District of Columbia 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 March 28, 2025.

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

See what other customers who have flown with Southwest, Alaska Airlines and Delta from District of Columbia to St. Louis have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from District of Columbia 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 District of Columbia?

What are the cheapest airlines to fly from District of Columbia to St. Louis one-way?

What are the most reliable airlines from District of Columbia to St. Louis?

What are the cheapest flights from District of Columbia to St. Louis?

Can I find deals for flights from District of Columbia to St. Louis that include hotel bookings?

How can I find direct flights from District of Columbia to St. Louis?

Can I find deals for business class flights from District of Columbia to St. Louis?

What is the cheapest month to book a flight from District of Columbia to St. Louis?

Traveling to a place near District of Columbia?

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Alternative routes for District of Columbia to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from District of Columbia to St. Louis

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Cheapest flights from District of Columbia to St. Louis
Explore the most affordable flight options available from District of Columbia to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.