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 Delta ($100), Frontier ($110), and Southwest ($115).

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 $1,212, our data indicates the cheapest price to be $148. The most popular route (Lambert-St Louis - Washington, D.C. Dulles Intl), is priced around $199.

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

Consider GoJet (82%), Avianca (82%) or Copa Airlines (82%) 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 American Airlines, Delta or United Airlines as they are the most popular for this route.

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

To save up to 170% on this flight, we recommend booking at least 31 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from St. Louis to District of Columbia from $424 1-2 weeks out and tickets from $567 for flights departing within the next 72 hours.

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

November is one of the best times of the year to fly to District of Columbia from St. Louis. Prices for November average $298 per person but you can even find prices for as low as $137. The most expensive prices can be found in the month of March. Opting for a November flight can save you 29% on your journey compared to booking in March

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.

$100+ Flights from St. Louis to District of Columbia

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Cheap flight deals from St. Louis to District of Columbia

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$204 (American Airlines)
One-way from	$100 (Delta)
Popular in	March
Cheapest in	November
Average price	$318
Good round-trip deal	$253 or less
Good one-way deal	$147 or less

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

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

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From Lambert-St Louis to District of Columbia

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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 ($34 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

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

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

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Find 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 April 29, 2025.

Thu 5/2910:25 amSTL - DCA

Nonstop1h 59mAmerican Airlines

Mon 6/28:15 amDCA - STL

Nonstop2h 27mAmerican Airlines

Deal found 4/29

$204

Thu 5/295:00 amSTL - IAD

1 stop5h 55mUnited Airlines

Sat 5/318:40 amIAD - STL

Nonstop2h 16mUnited Airlines

Deal found 4/29

$204

Thu 5/297:30 pmSTL - DCA

Nonstop2h 00mSouthwest

Sat 5/312:25 pmDCA - STL

1 stop6h 35mSouthwest

Deal found 4/29

$207

Fri 5/96:53 pmSTL - DCA

1 stop16h 14mFrontier

Fri 5/166:00 pmDCA - STL

1 stop16h 59mFrontier

Deal found 4/29

$208

Wed 5/215:45 pmSTL - IAD

1 stop17h 47mFrontier

Sat 5/2411:02 amIAD - STL

1 stop13h 42mFrontier

Deal found 4/28

$208

Thu 5/293:40 pmSTL - DCA

1 stop7h 03mDelta

Sun 6/16:59 amDCA - STL

1 stop6h 05mDelta

Deal found 4/29

$224

Sat 5/245:40 pmSTL - IAD

1 stop4h 55mDelta

Mon 5/266:00 amIAD - STL

1 stop4h 00mDelta

Deal found 4/28

$224

Fri 6/66:30 amSTL - DCA

1 stop4h 29mUnited Airlines

Wed 6/1110:30 amDCA - STL

1 stop6h 00mUnited Airlines

Deal found 4/29

$249

Sat 5/316:47 pmSTL - IAD

1 stop4h 15mAmerican Airlines

Tue 6/31:59 pmIAD - STL

1 stop6h 24mAmerican Airlines

Deal found 4/29

$251

Thu 5/2910:10 amSTL - IAD

2 stops27h 13mMultiple Airlines

Sun 6/111:54 amIAD - STL

2 stops7h 47mMultiple Airlines

Deal found 4/29

$393

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 April 29, 2025.

Thu 5/294:01 pmSTL - DCA

Nonstop1h 58mAmerican Airlines

Sun 6/18:15 amDCA - STL

Nonstop2h 27mAmerican Airlines

Deal found 4/29

$204

Thu 5/295:00 amSTL - IAD

1 stop5h 55mUnited Airlines

Sat 5/318:40 amIAD - STL

Nonstop2h 16mUnited Airlines

Deal found 4/29

$204

Sat 5/243:45 pmSTL - DCA

1 stop3h 45mSouthwest

Sat 5/316:50 pmDCA - STL

Nonstop2h 15mSouthwest

Deal found 4/28

$207

Sat 5/38:15 pmSTL - DCA

1 stop14h 52mFrontier

Tue 5/61:00 pmDCA - STL

1 stop21h 59mFrontier

Deal found 4/28

$208

Thu 5/296:45 amSTL - DCA

1 stop3h 46mDelta

Mon 6/27:33 pmDCA - STL

1 stop5h 05mDelta

Deal found 4/28

$224

Fri 5/309:50 amSTL - IAD

2 stops27h 54mMultiple Airlines

Sat 5/319:55 pmIAD - STL

2 stops21h 46mMultiple Airlines

Deal found 4/28

$387

Wed 5/215:45 pmSTL - IAD

1 stop17h 47mFrontier

Sat 5/2411:02 amIAD - STL

1 stop13h 42mFrontier

Deal found 4/28

$208

Sat 5/245:40 pmSTL - IAD

1 stop4h 55mDelta

Mon 5/266:00 amIAD - STL

1 stop4h 00mDelta

Deal found 4/28

$224

Fri 6/66:30 amSTL - DCA

1 stop4h 29mUnited Airlines

Wed 6/1110:30 amDCA - STL

1 stop6h 00mUnited Airlines

Deal found 4/29

$249

Sat 5/316:47 pmSTL - IAD

1 stop4h 15mAmerican Airlines

Tue 6/108:14 pmIAD - STL

1 stop4h 45mAmerican Airlines

Deal found 4/29

$251

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 April 29, 2025 and is based on user searches.

Tue 5/61:46 pmSTL - DCA

1 stop4h 13mDelta

Tue 5/138:45 amDCA - STL

1 stop7h 23mDelta

Deal found 4/29

$419

Tue 5/67:10 amSTL - IAD

1 stop4h 51mDelta

Tue 5/135:24 pmIAD - STL

1 stop4h 25mDelta

Deal found 4/29

$419

Tue 5/64:01 pmSTL - DCA

Nonstop1h 58mAmerican Airlines

Wed 5/79:10 pmDCA - STL

Nonstop2h 18mAmerican Airlines

Deal found 4/29

$429

Tue 5/61:00 pmSTL - IAD

Nonstop2h 09mUnited Airlines

Wed 5/78:35 amIAD - STL

Nonstop2h 23mUnited Airlines

Deal found 4/29

$429

Tue 5/61:59 pmSTL - IAD

1 stop4h 33mAmerican Airlines

Wed 5/79:11 amIAD - STL

1 stop4h 41mAmerican Airlines

Deal found 4/29

$449

Tue 5/67:05 pmSTL - DCA

Nonstop2h 00mSouthwest

Fri 5/98:00 amDCA - STL

Nonstop2h 10mSouthwest

Deal found 4/29

$479

Wed 5/73:43 pmSTL - DCA

1 stop4h 22mUnited Airlines

Mon 5/1910:30 amDCA - STL

1 stop6h 17mUnited Airlines

Deal found 4/28

$454

Thu 5/85:45 pmSTL - IAD

1 stop21h 51mFrontier

Mon 5/125:26 pmIAD - STL

1 stop7h 40mFrontier

Deal found 4/28

$228

Thu 5/89:50 amSTL - IAD

3 stops34h 07mMultiple Airlines

Sun 5/111:20 pmIAD - STL

3 stops30h 21mMultiple Airlines

Deal found 4/29

$474

Thu 5/86:30 amSTL - IAD

1 stop16h 53mAlaska Airlines

Wed 5/146:30 amIAD - STL

1 stop18h 29mAlaska Airlines

Deal found 4/29

$1,019

Thu 5/83:08 pmSTL - IAD

1 stop26h 05mAlaska Airlines

Tue 5/136:30 amIAD - STL

1 stop18h 29mAlaska Airlines

Deal found 4/29

$1,019

Fri 5/96:53 pmSTL - DCA

1 stop16h 14mFrontier

Fri 5/166:00 pmDCA - STL

1 stop16h 59mFrontier

Deal found 4/29

$208

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 April 29, 2025.

Wed 5/283:40 pmSTL - IAD

1 stop4h 54mDelta

Deal found 4/28

$100

Sat 5/315:35 pmSTL - IAD

1 stop18h 14mFrontier

Deal found 4/28

$110

Tue 6/108:15 amSTL - DCA

Nonstop2h 00mSouthwest

Deal found 4/29

$115

Wed 6/48:15 amSTL - IAD

Nonstop2h 08mUnited Airlines

Deal found 4/28

$115

Mon 6/27:24 pmSTL - DCA

1 stop15h 36mFrontier

Deal found 4/29

$116

Tue 5/209:40 amSTL - DCA

1 stop5h 01mUnited Airlines

Deal found 4/29

$125

Sat 5/249:50 amSTL - IAD

2 stops24h 14mMultiple Airlines

Deal found 4/28

$143

Thu 5/227:05 amSTL - DCA

1 stop6h 43mDelta

Deal found 4/29

$150

Sun 6/85:47 pmSTL - DCA

Nonstop2h 01mAmerican Airlines

Deal found 4/29

$159

Tue 5/137:10 amSTL - IAD

1 stop5h 12mAmerican Airlines

Deal found 4/29

$195

Tue 6/107:00 amSTL - DCA

1 stop13h 59mAlaska Airlines

Deal found 4/29

$416

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

Thu 5/29

10:25 am-1:24 pm

Nonstop1h 59m

Washington, D.C. Reagan-National

Mon 6/2

8:15 am-9:42 am

Nonstop2h 27m

$204

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Thu 5/29

5:00 am-11:55 am

1 stop5h 55m

Washington, D.C. Dulles Intl

Sat 5/31

8:40 am-9:56 am

Nonstop2h 16m

$204

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Thu 5/29

7:30 pm-10:30 pm

Nonstop2h 00m

Washington, D.C. Reagan-National

Sat 5/31

2:25 pm-8:00 pm

1 stop6h 35m

$207

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Fri 5/9

6:53 pm-12:07 pm

1 stop16h 14m

Washington, D.C. Reagan-National

Fri 5/16

6:00 pm-9:59 am

1 stop16h 59m

$208

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Wed 5/21

5:45 pm-12:32 pm

1 stop17h 47m

Washington, D.C. Dulles Intl

Sat 5/24

11:02 am-11:44 pm

1 stop13h 42m

$208

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Thu 5/29

10:45 am-3:59 pm

1 stop4h 14m

Washington, D.C. Reagan-National

Mon 6/2

6:59 am-12:04 pm

1 stop6h 05m

$224

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Sat 5/24

5:40 pm-11:35 pm

1 stop4h 55m

Washington, D.C. Dulles Intl

Mon 5/26

6:00 am-9:00 am

1 stop4h 00m

$224

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Sat 5/31

6:47 pm-12:02 am

1 stop4h 15m

Washington, D.C. Dulles Intl

Tue 6/3

1:59 pm-7:23 pm

1 stop6h 24m

$251

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Fri 5/30

9:50 am-2:44 pm

2 stops27h 54m

Washington, D.C. Dulles Intl

Sat 5/31

9:55 pm-6:41 pm

2 stops21h 46m

$387

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sat 5/31

5:27 pm-10:42 pm

1 stop4h 15m

Washington, D.C. Reagan-National

Tue 6/3

11:10 am-9:15 pm

2 stops11h 05m

$422

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 21 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, August is the cheapest month in which you can book a flight from St. Louis to District of Columbia (average of $309). Flying from St. Louis to District of Columbia in June is currently the most expensive (average of $373). 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 decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from St. Louis to District of Columbia

The most flights from STL to USDC are scheduled on a Monday (6 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in District of Columbia by month

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.

Temperature in District of Columbia by month

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).

Reviews of airlines servicing District of Columbia

Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from St. Louis to District of Columbia. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

9,968 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Southwest

8.0

Very good

4,295 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Delta

8.0

Very good

7,936 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

United Airlines

7.4

Good

8,696 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.
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 Delta ($100), Frontier ($110), and Southwest ($115).
What are the most reliable airlines from St. Louis to District of Columbia?
Consider GoJet (82%), Avianca (82%) or Copa Airlines (82%) 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 $1,212, our data indicates the cheapest price to be $148. The most popular route (Lambert-St Louis - Washington, D.C. Dulles Intl), is priced around $199.
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, August is the cheapest month in which you can book a flight from St. Louis to District of Columbia (average of $309). Flying from St. Louis to District of Columbia in June is currently the most expensive (average of $373). 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

Browse thousands of different options on Cheapflights for your next trip

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

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$108	Average$197	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$129	Average$325	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$176	Average$300	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$197	Average$340	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$210	Average$398	FlexibilityNo cancel fee	On-time69%

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$100+ 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 5/28. 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

Keep the following information in mind while searching for St. Louis to District of Columbia flight deals. Data was last updated April 29, 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 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 April 29, 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 April 29, 2025.

Cheapflights Fare Finder

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

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.

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?

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 April 29, 2025.

Weekly flight availability from St. Louis to District of Columbia

Rainfall in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average rainfall totals by month.

Temperature in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average temperature totals by month.

Reviews of airlines servicing District of Columbia

Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from St. Louis to District of Columbia. You can also see how each airline stacks up 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.

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

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

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

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

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

How can I 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?

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to District of Columbia

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

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 April 29, 2025.