How many flights depart from District of Columbia to St. Louis on average per day?

As of August 2025, there are 12 flights per day flying from District of Columbia to St. Louis. The most common time of day flights depart is 5:00PM, with 48% of flights taking off in the afternoon.

What is the cheapest airline that flies from District of Columbia to Lambert-St Louis?

Frontier, United Airlines, and American Airlines are the most popular carriers operating from District of Columbia to Lambert-St Louis

How many flights depart from District of Columbia to St. Louis on average per week?

As of August 2025, 89 flights take off from District of Columbia and land in St. Louis each week. The most common flight departure day for this route is Mon, with 18% of weekly flights taking off on this day.

What airlines fly to St. Louis?

Southwest, American Airlines and United Airlines are the top three most popular airlines that fly to St. Louis from District of Columbia according to our data. Southwest is the first choice among our users, with 50% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 5 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from District of Columbia to Lambert-St Louis Airport?

Prices for flights from District of Columbia to Lambert-St Louis Airport are refreshed on a daily basis.

How many operators does momondo search for flights from District of Columbia to Lambert-St Louis Airport?

As of August 2025, there are 4 operators available to choose from for flights from District of Columbia to Lambert-St Louis Airport.

How old do you have to be to fly from District of Columbia to Lambert-St Louis Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from District of Columbia to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$77 Cheap Flights from District of Columbia to St. Louis in 2025

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Find the cheapest flights from District of Columbia to St. Louis

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

6:10 am - 3:04 pmIAD-STL

9h 54m1 stop

4:00 pm - 12:15 amSTL-IAD

7h 15m1 stop

$143Frontier

Find Deal

Thu, Sep 25 - Mon, Sep 29

7:14 pm - 1:02 pmIAD-STL

18h 48m1 stop

4:00 pm - 12:15 amSTL-IAD

7h 15m1 stop

$160Frontier

Find Deal

Sun, Sep 7 - Mon, Sep 22

8:40 am - 10:02 amIAD-STL

2h 22mnonstop

1:10 pm - 4:20 pmSTL-IAD

2h 10mnonstop

$173United Airlines

Find Deal

Wed, Sep 3 - Mon, Sep 8

3:20 pm - 4:40 pmDCA-STL

2h 20mnonstop

6:30 pm - 9:35 pmSTL-DCA

2h 05mnonstop

$173Southwest

Find Deal

Thu, Sep 25 - Sat, Sep 27

1:15 pm - 7:27 pmIAD-STL

7h 12m1 stop

1:10 pm - 4:20 pmSTL-IAD

2h 10mnonstop

$183United Airlines

Find Deal

Wed, Sep 3 - Mon, Sep 8

12:00 pm - 1:20 pmDCA-STL

2h 20mnonstop

8:30 am - 11:25 amSTL-DCA

1h 55mnonstop

$195Southwest

Find Deal

Mon, Oct 6 - Sun, Nov 2

7:22 pm - 11:24 pmIAD-STL

5h 02m1 stop

3:55 pm - 11:17 pmSTL-IAD

6h 22m1 stop

$197Delta

Find Deal

Thu, Sep 25 - Sat, Sep 27

6:00 am - 9:33 amDCA-STL

4h 33m1 stop

3:40 pm - 10:42 pmSTL-DCA

6h 02m1 stop

$197Delta

Find Deal

Sun, Sep 14 - Thu, Sep 18

8:30 am - 10:21 amDCA-STL

2h 51mnonstop

10:34 am - 1:35 pmSTL-DCA

2h 01mnonstop

$212American Airlines

Find Deal

Thu, Sep 25 - Sun, Sep 28

7:51 pm - 9:02 pmDCA-STL

2h 11mnonstop

5:52 pm - 8:53 pmSTL-DCA

2h 01mnonstop

$213American Airlines

Find Deal

Sun, Aug 31 - Tue, Sep 2

American Airlines flights from District of Columbia to St. Louis

Our best American Airlines deals on District of Columbia to St. Louis flight tickets

American Airlines

Sep 25

DCA8:30 amWashington, D.C. Reagan-National

2h 51m

STL10:21 amLambert-St Louis

Sep 28

STL10:34 amLambert-St Louis

2h 01m

DCA1:35 pmWashington, D.C. Reagan-National

$212

Find similar

American Airlines

Aug 31

DCA7:51 pmWashington, D.C. Reagan-National

2h 11m

STL9:02 pmLambert-St Louis

Sep 2

STL5:52 pmLambert-St Louis

2h 01m

DCA8:53 pmWashington, D.C. Reagan-National

$213

Find similar

American Airlines

Sep 25

DCA2:56 pmWashington, D.C. Reagan-National

2h 19m

STL4:15 pmLambert-St Louis

Sep 28

STL6:05 amLambert-St Louis

3h 55m

1 stop

DCA11:00 amWashington, D.C. Reagan-National

$222

Find similar

Delta flights from District of Columbia to St. Louis

Our best Delta deals on District of Columbia to St. Louis flight tickets

Delta

Sep 14

DCA6:00 amWashington, D.C. Reagan-National

4h 33m

1 stop

STL9:33 amLambert-St Louis

Sep 18

STL3:40 pmLambert-St Louis

6h 02m

1 stop

DCA10:42 pmWashington, D.C. Reagan-National

$197

Find similar

Delta

Aug 31

IAD6:00 amWashington, D.C. Dulles Intl

4h 15m

1 stop

STL9:15 amLambert-St Louis

Sep 2

STL5:25 pmLambert-St Louis

5h 01m

1 stop

IAD11:26 pmWashington, D.C. Dulles Intl

$235

Find similar

Delta

Sep 26

IAD6:00 amWashington, D.C. Dulles Intl

4h 59m

1 stop

STL9:59 amLambert-St Louis

Sep 30

STL6:00 pmLambert-St Louis

4h 06m

1 stop

IAD11:06 pmWashington, D.C. Dulles Intl

$258

Find similar

momondo 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

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 9/25

6:10 am-3:04 pm

1 stop9h 54m

Lambert-St Louis

Mon 9/29

4:00 pm-12:15 am

1 stop7h 15m

$143

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sun 9/7

7:14 pm-1:02 pm

1 stop18h 48m

Lambert-St Louis

Mon 9/22

4:00 pm-12:15 am

1 stop7h 15m

$160

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Wed 9/3

8:40 am-10:02 am

Nonstop2h 22m

Lambert-St Louis

Mon 9/8

1:10 pm-4:20 pm

Nonstop2h 10m

$173

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 9/25

3:20 pm-4:40 pm

Nonstop2h 20m

Lambert-St Louis

Sat 9/27

6:30 pm-9:35 pm

Nonstop2h 05m

$173

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Wed 9/3

1:15 pm-7:27 pm

1 stop7h 12m

Lambert-St Louis

Mon 9/8

1:10 pm-4:20 pm

Nonstop2h 10m

$183

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Mon 10/6

12:00 pm-1:20 pm

Nonstop2h 20m

Lambert-St Louis

Sun 11/2

8:30 am-11:25 am

Nonstop1h 55m

$195

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 9/25

7:22 pm-11:24 pm

1 stop5h 02m

Lambert-St Louis

Sat 9/27

3:55 pm-11:17 pm

1 stop6h 22m

$197

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Sun 9/14

6:00 am-9:33 am

1 stop4h 33m

Lambert-St Louis

Thu 9/18

3:40 pm-10:42 pm

1 stop6h 02m

$197

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 9/25

8:30 am-10:21 am

Nonstop2h 51m

Lambert-St Louis

Sun 9/28

10:34 am-1:35 pm

Nonstop2h 01m

$212

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Sun 8/31

7:51 pm-9:02 pm

Nonstop2h 11m

Lambert-St Louis

Tue 9/2

5:52 pm-8:53 pm

Nonstop2h 01m

$213

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from District of Columbia to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to St. Louis?

In general, August is the cheapest month to fly from District of Columbia to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $277. The month of May is another great option to travel to St. Louis, with average flight prices from District of Columbia averaging around $297.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $348. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $404. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from District of Columbia in the evening is the least expensive time of day to depart. momondo users have found prices as low as $314 when looking at flights departing in the evening. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $386 per ticket.

What is the cheapest District of Columbia to Lambert-St Louis flight route?

Fly from Washington, D.C. Reagan-National to Lambert-St Louis for the best District of Columbia - Lambert-St Louis flight prices

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from District of Columbia when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $415 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from District of Columbia for as low as $315 on momondo.

What cabin class options are available on District of Columbia to Lambert-St Louis flights?

There are 4 cabin classes available to choose from on District of Columbia to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on District of Columbia to St. Louis flights?

No. A direct flight is the cheapest option for a flight between District of Columbia to St. Louis.

Cheap District of Columbia to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from District of Columbia to St. Louis

Best Price Found	$77
Fastest flight time	2h 10m
Direct flights	Every day
Airports in St. Louis	1 airport

The best one-way flight to St. Louis from District of Columbia in the past 72 hours is $77. The best round-trip flight deal from District of Columbia to St. Louis found on momondo in the last 72 hours is $143.

The fastest flight from District of Columbia to St. Louis takes 2h 10m

Direct flights go from District of Columbia to St. Louis every day.

There is 1 airport near St. Louis: Lambert-St Louis (STL)

Search flight deals

When did momondo last update prices for flights from District of Columbia to Lambert-St Louis Airport?
Prices for flights from District of Columbia to Lambert-St Louis Airport are refreshed on a daily basis.
How many operators does momondo search for flights from District of Columbia to Lambert-St Louis Airport?
As of August 2025, there are 4 operators available to choose from for flights from District of Columbia to Lambert-St Louis Airport.
How old do you have to be to fly from District of Columbia to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from District of Columbia to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from District of Columbia to St. Louis?
Based on momondo bookings for flights between District of Columbia and St. Louis, the leading plane model is Boeing 737 MAX 8, making up 15.20% of the total bookings. Other popular models include Boeing 737-700 Passenger/BBJ1 (winglets) with 14.58%, Boeing 737-800 Passenger/BBJ2 (winglets) with 14.04%, and Airbus A319 with 14.04%.

Best airlines flying from District of Columbia to St. Louis

Compare and see reviews for airlines that fly from District of Columbia to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $108	Free Cancellation	Rating 5.8 3,219 reviews	Search Frontier flights
American Airlines	PriceFrom $158	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Delta	PriceFrom $169	Free Cancellation	Rating 8.0 7,980 reviews	Search Delta flights
Southwest	PriceFrom $189	Free Cancellation	Rating 8.0 4,244 reviews	Search Southwest flights
United Airlines	PriceFrom $255	Free Cancellation	Rating 7.4 8,916 reviews	Search United Airlines flights

St. Charles

Chesterfield

Fairview Heights

Hermann

Maryland Heights

Florissant

O'Fallon

Fenton

Wentzville

Collinsville

Alton

St. Peters

Farmington

Festus

Glencoe

Eureka

Clayton

Edwardsville

Litchfield

Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from District of Columbia to St. Louis?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from District of Columbia to St. Louis. momondo saves you time and could save you money on your trip.

Can I find flights from District of Columbia to St. Louis with flexible booking policies on momondo?

Yes. All flights to St. Louis from District of Columbia on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from District of Columbia to St. Louis?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from District of Columbia.

I’m not ready to book a flight from District of Columbia to St. Louis right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of District of Columbia to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Cheap flights from District of Columbia to St. Louis from $77

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from District of Columbia to St. Louis departing on 9/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names and deals

Filter for what you want

Filter for what you want

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Find the cheapest flights from District of Columbia to St. Louis

Cheap round-trip flights

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Cheap last minute flights

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American Airlines flights from District of Columbia to St. Louis

Our best American Airlines deals on District of Columbia to St. Louis flight tickets

Delta flights from District of Columbia to St. Louis

Our best Delta deals on District of Columbia to St. Louis flight tickets

momondo Fare Finder

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

See travel insights to St. Louis from

How to get the cheapest flight ticket from District of Columbia to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to St. Louis?

What is the cheapest day to depart on your flight to St. Louis?

What is the cheapest time of day to depart on your flight to St. Louis?

What is the cheapest District of Columbia to Lambert-St Louis flight route?

Fly from Washington, D.C. Reagan-National to Lambert-St Louis for the best District of Columbia - Lambert-St Louis flight prices

How far in advance should I book a flight to St. Louis?

What cabin class options are available on District of Columbia to Lambert-St Louis flights?

There are 4 cabin classes available to choose from on District of Columbia to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on District of Columbia to St. Louis flights?

No. A direct flight is the cheapest option for a flight between District of Columbia to St. Louis.

What is the cheapest airline that flies from District of Columbia to Lambert-St Louis?

Frontier, United Airlines, and American Airlines are the most popular carriers operating from District of Columbia to Lambert-St Louis

What airlines fly to St. Louis?

How many flights depart from District of Columbia to St. Louis on average per day?

As of August 2025, there are 12 flights per day flying from District of Columbia to St. Louis. The most common time of day flights depart is 5:00PM, with 48% of flights taking off in the afternoon.

How many flights depart from District of Columbia to St. Louis on average per week?

As of August 2025, 89 flights take off from District of Columbia and land in St. Louis each week. The most common flight departure day for this route is Mon, with 18% of weekly flights taking off on this day.

Cheap District of Columbia to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from District of Columbia to St. Louis

Best Price Found

Fastest flight time

Direct flights

Airports in St. Louis

When did momondo last update prices for flights from District of Columbia to Lambert-St Louis Airport?

How many operators does momondo search for flights from District of Columbia to Lambert-St Louis Airport?

How old do you have to be to fly from District of Columbia to Lambert-St Louis Airport?

What documentation or ID do you need to fly to Lambert-St Louis Airport?

What is the most popular plane model from District of Columbia to St. Louis?

Best airlines flying from District of Columbia to St. Louis

Compare and see reviews for airlines that fly from District of Columbia to St. Louis with momondo

Traveling to a place near St. Louis?

Why use momondo?

Why should I use momondo to find a flight deal from District of Columbia to St. Louis?

Can I find flights from District of Columbia to St. Louis with flexible booking policies on momondo?

How can momondo help me find flights from District of Columbia to St. Louis?

I’m not ready to book a flight from District of Columbia to St. Louis right now. Can momondo alert me if prices change?

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

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