How many flights depart from United States to St. Louis on average per week?

650 flights are operational weekly from United States to St. Louis as of December 2025. The most popular departure day for this route is Mon, with 18% of flights per week taking off on this day.

How many flights depart from United States to St. Louis on average per day?

92 flights are operational daily from United States to St. Louis as of December 2025. The most popular departure time for this route is 3:00PM, with 44% of flights per day taking off in the afternoon.

What is the most punctual flight time for the United States to St. Louis flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

How often are flights from the United States to St. Louis delayed?

Historically, on average around 15% of flights between United States and St. Louis have experienced a delay on any given week. The average delay length over the past 12 months has been 127 minutes.

What airlines fly to St. Louis?

Southwest, American Airlines and Frontier are the top three most popular airlines that fly to St. Louis from United States according to our data. Southwest is the first choice among our users, with 39% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 14 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from United States to Lambert-St Louis?

Frontier, United Airlines, and Delta are the most popular carriers operating from United States to Lambert-St Louis

Which airline has the best punctuality record on the United States to St. Louis flights?

According to our data, Southwest have had the least number of delays on this route over the last 12 months; with about 14% of their flights experiencing any sort of delay.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

How long does it take to fly to St. Louis?

Flight times from United States to St. Louis vary, but if you’re flying out of New York and flying into St. Louis (one of the most popular routes), then the duration is 2h 45m on average. Another popular route from United States to St. Louis is flying from Boston to St. Louis, which will take roughly 2h 50m. Keep in mind that layovers or delays could extend your travel time.

When did momondo last update prices for flights from United States to Lambert-St Louis Airport?

Prices for flights from United States to Lambert-St Louis Airport are refreshed on a daily basis.

How many operators does momondo search for flights from United States to Lambert-St Louis Airport?

As of December 2025, there are 8 operators available to choose from for flights from United States to Lambert-St Louis Airport.

How old do you have to be to fly from United States to Lambert-St Louis Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United States to Lambert-St Louis Airport.

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

The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$43 Cheap Flights from the United States to St. Louis in 2025/26

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Find the cheapest flights from the United States to St. Louis

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from the United States to St. Louis

Enter your travel dates to find the best prices.

6:00 am - 6:51 am

ATL

STL

1h 51mnonstop

8:32 pm - 11:16 pm

STL

ATL

1h 44mnonstop

$79Frontier

Sat, Jan 17 - Sat, Jan 17

6:00 am - 6:51 am

ATL

STL

1h 51mnonstop

8:17 pm - 10:57 pm

STL

ATL

1h 40mnonstop

$80Frontier

Wed, Feb 25 - Sat, Feb 28

8:40 am - 10:13 am

IAD

STL

2h 33mnonstop

12:44 pm - 3:55 pm

STL

IAD

2h 11mnonstop

$263United Airlines

Sat, Jan 17 - Mon, Jan 19

5:50 pm - 7:27 pm

IAD

STL

2h 37mnonstop

8:30 am - 11:40 am

STL

IAD

2h 10mnonstop

$267United Airlines

Fri, Jan 23 - Sat, Jan 24

10:30 am - 12:33 pm

LGA

STL

3h 03mnonstop

9:45 am - 1:11 pm

STL

LGA

2h 26mnonstop

$273Delta

Tue, Jan 20 - Wed, Jan 21

9:00 am - 6:16 pm

JFK

STL

10h 16m1 stop

9:54 am - 2:57 pm

STL

JFK

4h 03m1 stop

$276American Airlines

Tue, Jan 20 - Fri, Jan 30

6:05 pm - 8:06 pm

LGA

STL

3h 01mnonstop

6:35 am - 11:59 am

STL

LGA

4h 24m1 stop

$277Delta

Wed, Jan 28 - Fri, Jan 30

1:30 pm - 8:10 pm

LGA

STL

7h 40m1 stop

7:55 pm - 11:15 pm

STL

LGA

2h 20mnonstop

$278Southwest

Sat, Jan 17 - Mon, Jan 19

7:20 am - 4:50 pm

LGA

STL

10h 30m2 stops

6:00 am - 4:25 pm

STL

LGA

9h 25m1 stop

$282Southwest

Wed, Feb 11 - Wed, Feb 18

5:16 pm - 11:26 pm

LGA

STL

7h 10m1 stop

3:30 pm - 6:59 pm

STL

LGA

2h 29mnonstop

$283American Airlines

Sat, Jan 17 - Mon, Jan 26

Frontier flights from United States to St. Louis

Our best Frontier deals on United States to St. Louis flight tickets

Frontier

Jan 17

ATL6:00 amAtlanta Hartsfield-Jackson

1h 51m

STL6:51 amLambert-St Louis

Jan 17

STL8:32 pmLambert-St Louis

1h 44m

ATL11:16 pmAtlanta Hartsfield-Jackson

$79

Find similar

Frontier

Feb 25

ATL6:00 amAtlanta Hartsfield-Jackson

1h 51m

STL6:51 amLambert-St Louis

Feb 28

STL8:17 pmLambert-St Louis

1h 40m

ATL10:57 pmAtlanta Hartsfield-Jackson

$80

Find similar

Frontier

Feb 18

ATL6:00 amAtlanta Hartsfield-Jackson

10h 53m

1 stop

STL3:53 pmLambert-St Louis

Feb 21

STL8:17 pmLambert-St Louis

1h 40m

ATL10:57 pmAtlanta Hartsfield-Jackson

$93

Find similar

American Airlines flights from United States to St. Louis

Our best American Airlines deals on United States to St. Louis flight tickets

American Airlines

Jan 20

JFK9:00 amNew York John F Kennedy Intl

10h 16m

1 stop

STL6:16 pmLambert-St Louis

Jan 30

STL9:54 amLambert-St Louis

4h 03m

1 stop

JFK2:57 pmNew York John F Kennedy Intl

$276

Find similar

American Airlines

Jan 29

IAD11:34 amWashington, D.C. Dulles Intl

4h 30m

1 stop

STL3:04 pmLambert-St Louis

Feb 4

STL6:52 amLambert-St Louis

4h 44m

1 stop

IAD12:36 pmWashington, D.C. Dulles Intl

$285

Find similar

American Airlines

Jan 20

MSP11:40 amMinneapolis St Paul

7h 49m

1 stop

STL7:29 pmLambert-St Louis

Jan 23

STL8:13 amLambert-St Louis

7h 54m

1 stop

MSP4:07 pmMinneapolis St Paul

$292

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from the United States to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Sat 1/17

6:00 am-6:51 am

Nonstop1h 51m

Lambert-St Louis

Sat 1/17

8:32 pm-11:16 pm

Nonstop1h 44m

$79

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Wed 2/25

6:00 am-6:51 am

Nonstop1h 51m

Lambert-St Louis

Sat 2/28

8:17 pm-10:57 pm

Nonstop1h 40m

$80

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 1/17

8:40 am-10:13 am

Nonstop2h 33m

Lambert-St Louis

Mon 1/19

12:44 pm-3:55 pm

Nonstop2h 11m

$263

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Fri 1/23

5:50 pm-7:27 pm

Nonstop2h 37m

Lambert-St Louis

Sat 1/24

8:30 am-11:40 am

Nonstop2h 10m

$267

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Tue 1/20

10:30 am-12:33 pm

Nonstop3h 03m

Lambert-St Louis

Wed 1/21

9:45 am-1:11 pm

Nonstop2h 26m

$273

New YorkSt. Louis

JFK - STL

JFKSTL

New York John F Kennedy Intl

Tue 1/20

9:00 am-6:16 pm

1 stop10h 16m

Lambert-St Louis

Fri 1/30

9:54 am-2:57 pm

1 stop4h 03m

$276

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Wed 1/28

6:05 pm-8:06 pm

Nonstop3h 01m

Lambert-St Louis

Fri 1/30

6:35 am-11:59 am

1 stop4h 24m

$277

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Sat 1/17

1:30 pm-8:10 pm

1 stop7h 40m

Lambert-St Louis

Mon 1/19

7:55 pm-11:15 pm

Nonstop2h 20m

$278

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Wed 2/11

7:20 am-4:50 pm

2 stops10h 30m

Lambert-St Louis

Wed 2/18

6:00 am-4:25 pm

1 stop9h 25m

$282

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Sat 1/17

5:16 pm-11:26 pm

1 stop7h 10m

Lambert-St Louis

Mon 1/26

3:30 pm-6:59 pm

Nonstop2h 29m

$283

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How to get the cheapest flight ticket from United States 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

Delays

Other information

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

In general, January is the cheapest month to fly from United States to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $299. The month of March is another great option to travel to St. Louis, with average flight prices from United States averaging around $299.

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 $311. 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 $440. 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 United States in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $341 when looking at flights departing in the afternoon. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $369 per ticket.

What is the cheapest United States to Lambert-St Louis flight route?

Fly from Orlando to Lambert-St Louis for the best United States - Lambert-St Louis flight prices

What cabin class options are available on United States to Lambert-St Louis flights?

There are 4 cabin classes available to choose from on United States 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 United States to St. Louis flights?

No. A direct flight is the cheapest option for a flight between United States to St. Louis.

Cheap United States to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to St. Louis

Best Price Found	$89
Fastest flight time	1h 05m
Direct flights	Every day
Airports in St. Louis	1 airport

The best one-way flight to St. Louis from United States in the past 72 hours is $89. The best round-trip flight deal from United States to St. Louis found on momondo in the last 72 hours is $61.

The fastest flight from United States to St. Louis takes 1h 05m

Direct flights go from United States to St. Louis every day.

There is 1 airport in St. Louis. From United States there are direct flights to Lambert-St Louis (STL).

Search flight deals

When did momondo last update prices for flights from United States to Lambert-St Louis Airport?
Prices for flights from United States to Lambert-St Louis Airport are refreshed on a daily basis.
How many operators does momondo search for flights from United States to Lambert-St Louis Airport?
As of December 2025, there are 8 operators available to choose from for flights from United States to Lambert-St Louis Airport.
How old do you have to be to fly from United States to Lambert-St Louis Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United States to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from United States to St. Louis?
Based on momondo bookings for flights between United States and St. Louis, the leading plane model is Boeing 737 MAX 8, making up 18.64% of the total bookings. Other popular models include Boeing 737-800 Passenger/BBJ2 (winglets) with 13.52%, Boeing 737-700 Passenger/BBJ1 (winglets) with 12.33%, and Embraer 175 with 8.07%.

Best airlines flying from United States to St. Louis

Compare and see reviews for airlines that fly from United States to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $65	Free Cancellation	Rating 5.7 3,063 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $71	Free Cancellation	Rating 6.3 8,221 reviews	Search Spirit Airlines flights
American Airlines	PriceFrom $133	Free Cancellation	Rating 7.2 11,073 reviews	Search American Airlines flights
United Airlines	PriceFrom $166	Free Cancellation	Rating 7.4 9,119 reviews	Search United Airlines flights
Delta	PriceFrom $177	Free Cancellation	Rating 7.9 8,015 reviews	Search Delta flights
Southwest	PriceFrom $177	Free Cancellation	Rating 8.0 4,252 reviews	Search Southwest flights
JetBlue	PriceFrom $243	Free Cancellation	Rating 7.2 2,902 reviews	Search JetBlue flights
Alaska Airlines	PriceFrom $257	Free Cancellation	Rating 8.0 11,559 reviews	Search Alaska Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

O'Fallon

Florissant

Fenton

Collinsville

St. Peters

Wentzville

Alton

Farmington

Clayton

Glencoe

Eureka

Festus

Edwardsville

Litchfield

Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from United States to St. Louis?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from United States to St. Louis for you.

Can I find flights from United States to St. Louis with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to St. Louis from United States with this policy.

How can momondo help me find flights from United States to St. Louis?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from United States to St. Louis.

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

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from United States and alert you when they change.

An easier way to manage your St. Louis trip

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Cheap flights from the United States to St. Louis from $43

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to St. Louis departing on 1/26. 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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momondo Fare Finder

Use the filters below to find and compare flights from the United States to St. Louis that are best for you.

See travel insights to St. Louis from

How to get the cheapest flight ticket from United States to St. Louis

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 United States to Lambert-St Louis flight route?

Fly from Orlando to Lambert-St Louis for the best United States - Lambert-St Louis flight prices

What cabin class options are available on United States to Lambert-St Louis flights?

There are 4 cabin classes available to choose from on United States 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 United States to St. Louis flights?

No. A direct flight is the cheapest option for a flight between United States to St. Louis.

What is the cheapest airline that flies from United States to Lambert-St Louis?

Frontier, United Airlines, and Delta are the most popular carriers operating from United States to Lambert-St Louis

What airlines fly to St. Louis?

How often are flights from the United States to St. Louis delayed?

Historically, on average around 15% of flights between United States and St. Louis have experienced a delay on any given week. The average delay length over the past 12 months has been 127 minutes.

What is the most punctual flight time for the United States to St. Louis flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on the United States to St. Louis flights?

According to our data, Southwest have had the least number of delays on this route over the last 12 months; with about 14% of their flights experiencing any sort of delay.

How many flights depart from United States to St. Louis on average per day?

92 flights are operational daily from United States to St. Louis as of December 2025. The most popular departure time for this route is 3:00PM, with 44% of flights per day taking off in the afternoon.

How many flights depart from United States to St. Louis on average per week?

650 flights are operational weekly from United States to St. Louis as of December 2025. The most popular departure day for this route is Mon, with 18% of flights per week taking off on this day.

How long does it take to fly to St. Louis?

Cheap United States to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to St. Louis

Best Price Found

Fastest flight time

Direct flights

Airports in St. Louis

When did momondo last update prices for flights from United States to Lambert-St Louis Airport?

How many operators does momondo search for flights from United States to Lambert-St Louis Airport?

How old do you have to be to fly from United States 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 United States to St. Louis?

Best airlines flying from United States to St. Louis

Compare and see reviews for airlines that fly from United States 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 United States to St. Louis?

Can I find flights from United States to St. Louis with flexible booking policies on momondo?

How can momondo help me find flights from United States to St. Louis?

I’m not ready to book a flight from United States 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

Airports servicing Missouri