How long is the flight from St. Louis to District of Columbia?

There are many flights that can get you from St. Louis to District of Columbia in 2h 11m. Fly via American Airlines, Southwest, or United Airlines to get the fastest option. There are 717 mi between St. Louis and District of Columbia. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

The cheapest airlines for a one-way flight from St. Louis to District of Columbia are Frontier ($63), American Airlines ($72), and Delta ($89).

In terms of precipitation, rainfall in District of Columbia ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit District of Columbia when rainfall is around 2.6 in.

If weather is an important factor for your trip to District of Columbia, 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 35.6 F).

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

Looking for the cheapest flight from St. Louis to District of Columbia? While on average our users pay $1,317, our data indicates the cheapest price to be $156. The most popular route (Lambert-St Louis - Washington, D.C. Dulles Intl), is priced around $155.

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

Consider Copa Airlines (81%), Avianca (78%) or GoJet (71%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to District of Columbia.

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

When booking a flight from St. Louis to District of Columbia, you may want to consider flying on Southwest, American Airlines or United Airlines as they are the most popular for this route.

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

If you book a flight to District of Columbia from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis.

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

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

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

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

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

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

$68+ Flights from St. Louis to District of Columbia

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Cheap flight deals from St. Louis to District of Columbia

Cheapest flights from St. Louis to District of Columbia
Explore the most affordable flight options available from St. Louis to District of Columbia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

Wed 12/246:35 pmSTL - IAD

1 stop4h 40mUnited Airlines

Wed 12/318:35 amIAD - STL

Nonstop2h 33mUnited Airlines

Deal found 12/16

$237

Wed 12/247:00 amSTL - DCA

1 stop7h 05mDelta

Wed 12/3112:32 pmDCA - STL

1 stop5h 28mDelta

Deal found 12/16

$247

Thu 12/2510:42 amSTL - IAD

1 stop6h 34mFrontier

Mon 12/299:58 pmIAD - STL

1 stop25h 35mFrontier

Deal found 12/16

$258

Fri 12/199:07 amSTL - IAD

1 stop22h 44mFrontier

Tue 12/309:58 pmIAD - STL

1 stop25h 35mFrontier

Deal found 12/16

$261

Thu 12/1810:42 amSTL - IAD

1 stop6h 34mFrontier

Sun 1/116:00 amIAD - STL

1 stop9h 48mFrontier

Deal found 12/17

$277

Thu 12/2510:42 amSTL - IAD

1 stop6h 34mFrontier

Tue 12/309:58 pmIAD - STL

1 stop25h 35mFrontier

Deal found 12/16

$283

Thu 12/258:15 amSTL - IAD

Nonstop2h 09mUnited Airlines

Wed 12/315:50 pmIAD - STL

Nonstop2h 32mUnited Airlines

Deal found 12/16

$297

Wed 12/244:27 pmSTL - IAD

2 stops18h 11mFrontier

Wed 12/317:01 pmIAD - STL

1 stop15h 39mFrontier

Deal found 12/16

$313

Wed 12/317:43 pmSTL - DCA

1 stop16h 18mFrontier

Fri 1/26:00 pmDCA - STL

1 stop17h 02mFrontier

Deal found 12/16

$330

Thu 12/1810:42 amSTL - IAD

1 stop6h 34mFrontier

Mon 12/299:58 pmIAD - STL

1 stop25h 35mFrontier

Deal found 12/16

$333

Thu 12/256:02 amSTL - DCA

Nonstop2h 08mAmerican Airlines

Fri 1/28:14 pmDCA - STL

Nonstop2h 31mAmerican Airlines

Deal found 12/18

$348

Thu 12/257:00 amSTL - DCA

1 stop7h 05mDelta

Fri 1/25:42 pmDCA - STL

1 stop4h 58mDelta

Deal found 12/18

$368

Best flights from St. Louis to District of Columbia
Discover carefully curated flight deals from St. Louis to District of Columbia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.

Wed 1/75:59 pmSTL - DCA

Nonstop2h 11mAmerican Airlines

Sat 1/107:40 amDCA - STL

Nonstop2h 44mAmerican Airlines

Deal found 12/16

$235

Sat 1/1710:25 amSTL - DCA

1 stop4h 05mSouthwest

Sun 1/1812:00 pmDCA - STL

Nonstop2h 35mSouthwest

Deal found 12/17

$237

Sat 1/176:30 amSTL - IAD

1 stop4h 16mUnited Airlines

Sat 1/175:38 pmIAD - STL

1 stop7h 21mUnited Airlines

Deal found 12/15

$242

Mon 1/510:10 pmSTL - DCA

2 stops13h 52mFrontier

Fri 1/96:00 pmDCA - STL

1 stop17h 02mFrontier

Deal found 12/16

$244

Wed 1/217:10 amSTL - IAD

1 stop6h 35mDelta

Fri 1/233:42 pmIAD - STL

1 stop5h 55mDelta

Deal found 12/17

$296

Sun 1/255:42 pmSTL - DCA

2 stops27h 17mFrontier

Fri 1/306:00 pmDCA - STL

1 stop21h 46mFrontier

Deal found 12/17

$247

Thu 1/81:05 pmSTL - DCA

Nonstop1h 55mSouthwest

Sat 1/108:00 amDCA - STL

Nonstop2h 35mSouthwest

Deal found 12/16

$273

Sat 1/318:30 amSTL - IAD

Nonstop2h 10mUnited Airlines

Mon 2/25:17 pmIAD - STL

1 stop6h 41mUnited Airlines

Deal found 12/16

$275

Thu 1/228:20 amSTL - DCA

Nonstop1h 55mSouthwest

Sat 1/2412:45 pmDCA - STL

2 stops8h 25mSouthwest

Deal found 12/16

$280

Fri 1/169:57 amSTL - IAD

1 stop6h 38mUnited Airlines

Sat 1/178:40 amIAD - STL

Nonstop2h 33mUnited Airlines

Deal found 12/15

$282

Tue 3/107:10 amSTL - IAD

1 stop6h 29mDelta

Wed 3/1112:12 pmIAD - STL

1 stop5h 30mDelta

Deal found 12/15

$313

Sat 1/317:40 amSTL - DCA

2 stops7h 35mSouthwest

Mon 2/26:45 pmDCA - STL

Nonstop2h 30mSouthwest

Deal found 12/16

$280

Thu 1/226:57 pmSTL - IAD

1 stop4h 27mDelta

Mon 1/2612:40 pmIAD - STL

1 stop6h 10mDelta

Deal found 12/15

$315

Fri 1/166:30 amSTL - IAD

1 stop4h 16mUnited Airlines

Tue 1/276:00 amIAD - STL

1 stop5h 41mUnited Airlines

Deal found 12/16

$296

Sat 2/77:40 amSTL - DCA

2 stops7h 35mSouthwest

Mon 2/96:35 pmDCA - STL

Nonstop2h 30mSouthwest

Deal found 12/16

$280

Tue 1/2712:44 pmSTL - IAD

Nonstop2h 11mUnited Airlines

Sun 2/18:40 amIAD - STL

Nonstop2h 33mUnited Airlines

Deal found 12/17

$298

Fri 1/169:40 amSTL - DCA

1 stop4h 15mSouthwest

Tue 1/276:45 pmDCA - STL

Nonstop2h 30mSouthwest

Deal found 12/16

$282

Thu 1/158:30 amSTL - IAD

Nonstop2h 10mUnited Airlines

Thu 1/228:40 amIAD - STL

Nonstop2h 33mUnited Airlines

Deal found 12/17

$303

Wed 1/141:05 pmSTL - DCA

Nonstop1h 55mSouthwest

Thu 1/156:10 amDCA - STL

1 stop7h 20mSouthwest

Deal found 12/17

$283

Mon 2/26:30 amSTL - IAD

1 stop4h 16mUnited Airlines

Thu 2/56:00 amIAD - STL

1 stop5h 41mUnited Airlines

Deal found 12/15

$315

Last-minute flights from St. Louis to District of Columbia
Discover last-minute flight deals from St. Louis to District of Columbia. Data last updated December 18, 2025 and is based on user searches.

Wed 12/246:35 pmSTL - IAD

1 stop4h 40mUnited Airlines

Wed 12/318:35 amIAD - STL

Nonstop2h 33mUnited Airlines

Deal found 12/16

$237

Thu 1/110:42 amSTL - IAD

1 stop6h 34mFrontier

Mon 1/59:58 pmIAD - STL

1 stop25h 35mFrontier

Deal found 12/16

$219

Sun 1/410:57 amSTL - IAD

1 stop23h 41mFrontier

Wed 1/75:42 pmIAD - STL

1 stop22h 06mFrontier

Deal found 12/17

$227

Mon 1/510:40 amSTL - IAD

1 stop9h 23mFrontier

Fri 1/96:00 amIAD - STL

1 stop9h 48mFrontier

Deal found 12/16

$218

Wed 1/75:59 pmSTL - DCA

Nonstop2h 11mAmerican Airlines

Sat 1/107:40 amDCA - STL

Nonstop2h 44mAmerican Airlines

Deal found 12/16

$235

Thu 1/85:11 pmSTL - IAD

1 stop13h 44mFrontier

Sun 1/118:35 amIAD - STL

1 stop24h 30mFrontier

Deal found 12/16

$209

Thu 1/83:43 pmSTL - IAD

2 stops21h 25mFrontier

Mon 1/128:35 amIAD - STL

1 stop14h 58mFrontier

Deal found 12/16

$211

Fri 1/98:35 amSTL - IAD

1 stop23h 33mFrontier

Mon 1/128:35 amIAD - STL

1 stop14h 58mFrontier

Deal found 12/16

$221

Wed 1/143:43 pmSTL - DCA

1 stop20h 19mFrontier

Thu 1/156:00 pmDCA - STL

1 stop25h 32mFrontier

Deal found 12/17

$226

Sat 1/173:43 pmSTL - DCA

1 stop20h 19mFrontier

Sun 1/256:00 pmDCA - STL

1 stop19h 50mFrontier

Deal found 12/17

$216

Sat 1/178:55 amSTL - DCA

Nonstop1h 55mSouthwest

Sun 1/1812:00 pmDCA - STL

Nonstop2h 35mSouthwest

Deal found 12/17

$227

Thu 1/2910:01 pmSTL - DCA

2 stops17h 58mFrontier

Tue 2/36:00 pmDCA - STL

1 stop21h 46mFrontier

Deal found 12/16

$240

One-way flights from St. Louis to District of Columbia
Search for one-way flight options from St. Louis to District of Columbia. Find affordable one-way fares based on user searches. Data last updated December 18, 2025.

Wed 1/288:22 pmSTL - IAD

1 stop19h 06mFrontier

Deal found 12/16

$68

Wed 1/148:32 pmSTL - IAD

1 stop14h 11mFrontier

Deal found 12/17

$69

Wed 1/213:46 pmSTL - DCA

1 stop29h 13mFrontier

Deal found 12/17

$70

Sat 1/245:42 pmSTL - IAD

1 stop13h 51mFrontier

Deal found 12/18

$70

Mon 1/127:43 pmSTL - DCA

1 stop16h 19mFrontier

Deal found 12/17

$79

Wed 1/77:43 pmSTL - DCA

1 stop20h 16mFrontier

Deal found 12/17

$80

Mon 1/261:40 pmSTL - DCA

1 stop7h 19mFrontier

Deal found 12/16

$81

Tue 4/710:42 amSTL - IAD

1 stop7h 01mFrontier

Deal found 12/18

$81

Fri 1/237:39 pmSTL - DCA

1 stop16h 23mFrontier

Deal found 12/17

$83

Fri 1/167:27 pmSTL - DCA

1 stop25h 32mFrontier

Deal found 12/17

$85

Sat 1/107:43 pmSTL - DCA

1 stop16h 18mFrontier

Deal found 12/17

$87

Sat 1/105:11 pmSTL - IAD

1 stop13h 29mFrontier

Deal found 12/16

$87

Find flight deals from St. Louis to District of Columbia

Most accurate provider	Gotogate 3 stars
Most trusted provider	Gotogate 3 stars
Round-trip from	$209 (Mytrip)
One-way from	$68 (Kiwi.com)
Popular in	March
Cheapest in	August
Average price	$335
Good round-trip deal	$315 or less
Good one-way deal	$191 or less

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

Search Deals

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

Search Deals

From Lambert-St Louis to District of Columbia

Search Deals

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

Search Deals

Highest demand for flights based on searches. 10% potential increase in price ($33 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

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

Search Deals

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

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Wed 1/7

5:59 pm-9:10 pm

Nonstop2h 11m

Washington, D.C. Reagan-National

Sat 1/10

7:40 am-9:24 am

Nonstop2h 44m

$235

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sat 1/17

10:25 am-3:30 pm

1 stop4h 05m

Washington, D.C. Reagan-National

Sun 1/18

12:00 pm-1:35 pm

Nonstop2h 35m

$237

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Sat 1/17

6:30 am-11:46 am

1 stop4h 16m

Washington, D.C. Dulles Intl

Sat 1/17

5:38 pm-11:59 pm

1 stop7h 21m

$242

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Mon 1/5

10:10 pm-1:02 pm

2 stops13h 52m

Washington, D.C. Reagan-National

Fri 1/9

6:00 pm-10:02 am

1 stop17h 02m

$244

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sun 1/25

5:42 pm-9:59 pm

2 stops27h 17m

Washington, D.C. Reagan-National

Fri 1/30

6:00 pm-2:46 pm

1 stop21h 46m

$247

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Thu 1/8

1:05 pm-4:00 pm

Nonstop1h 55m

Washington, D.C. Reagan-National

Sat 1/10

8:00 am-9:35 am

Nonstop2h 35m

$273

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Sat 1/31

8:30 am-11:40 am

Nonstop2h 10m

Washington, D.C. Dulles Intl

Mon 2/2

5:17 pm-10:58 pm

1 stop6h 41m

$275

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Thu 1/22

8:20 am-11:15 am

Nonstop1h 55m

Washington, D.C. Reagan-National

Sat 1/24

12:45 pm-8:10 pm

2 stops8h 25m

$280

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sat 1/31

7:40 am-4:15 pm

2 stops7h 35m

Washington, D.C. Reagan-National

Mon 2/2

6:45 pm-8:15 pm

Nonstop2h 30m

$280

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sat 2/7

7:40 am-4:15 pm

2 stops7h 35m

Washington, D.C. Reagan-National

Mon 2/9

6:35 pm-8:05 pm

Nonstop2h 30m

$280

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 39 results

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

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

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

Currently, December is the cheapest month in which you can book a flight from St. Louis to District of Columbia (average of $98). Flying from St. Louis to District of Columbia in June is currently the most expensive (average of $198). 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 STL to DC?

When flying from St. Louis to District of Columbia, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 48% versus a flight at noon.

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

Travelers seeking maximum savings on their St. Louis to District of Columbia flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing District of Columbia

Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from St. Louis to District of Columbia by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Southwest

7.9

Good

4,250 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Delta

7.9

Good

8,005 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

United Airlines

7.4

Good

9,091 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

American Airlines

7.2

Good

11,054 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Frontier

5.8

Fair

3,081 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

What airport do you fly from for flights from St. Louis to District of Columbia?
If you book a flight to District of Columbia from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis.
How long is the flight from St. Louis to District of Columbia?
There are many flights that can get you from St. Louis to District of Columbia in 2h 11m. Fly via American Airlines, Southwest, or United Airlines to get the fastest option. There are 717 mi between St. Louis and District of Columbia. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What are the cheapest airlines to fly from St. Louis to District of Columbia one-way?
The cheapest airlines for a one-way flight from St. Louis to District of Columbia are Frontier ($63), American Airlines ($72), and Delta ($89).
What are the most reliable airlines from St. Louis to District of Columbia?
Consider Copa Airlines (81%), Avianca (78%) or GoJet (71%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to District of Columbia.
What are the cheapest flights from St. Louis to District of Columbia?
Looking for the cheapest flight from St. Louis to District of Columbia? While on average our users pay $1,317, our data indicates the cheapest price to be $156. The most popular route (Lambert-St Louis - Washington, D.C. Dulles Intl), is priced around $155.
Can I find deals for flights from St. Louis to District of Columbia that include hotel bookings?
Yes. In addition to deals on St. Louis to District of Columbia flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to District of Columbia?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to District of Columbia.
Can I find deals for business class flights from St. Louis to District of Columbia?
Yes. Cheapflights offers flight deals from St. Louis to District of Columbia 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 St. Louis to District of Columbia?
Currently, December is the cheapest month in which you can book a flight from St. Louis to District of Columbia (average of $98). Flying from St. Louis to District of Columbia in June is currently the most expensive (average of $198). 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 5 airlines flying from St. Louis to District of Columbia

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$113	Average$217	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$124	Average$282	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$177	Average$346	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$197	Average$343	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$264	Average$459	FlexibilityNo cancel fee	On-time69%

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$68+ Cheap flights from St. Louis (STL) to District of Columbia

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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from St. Louis to District of Columbia

Cheapest flights from St. Louis to District of ColumbiaExplore the most affordable flight options available from St. Louis to District of Columbia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

Explore the most affordable flight options available from St. Louis to District of Columbia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

Find flight deals from St. Louis to District of Columbia

Keep the following information in mind while searching for St. Louis to District of Columbia flight deals. Data was last updated December 18, 2025.

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

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

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

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

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

Find hourly flight availability from St. Louis to District of Columbia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

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

Use this chart to determine the cheapest time to fly round-trip from St. Louis to District of Columbia. Price data was last updated on December 13, 2025.

Reviews of airlines servicing District of Columbia

Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from St. Louis to District of Columbia by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

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

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Alternative routes for St. Louis to District of Columbia

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Top 5 airlines flying from St. Louis to District of Columbia

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Cheapest flights from St. Louis to District of Columbia
Explore the most affordable flight options available from St. Louis to District of Columbia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.