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

89 flights are operational daily from St. Louis to United States as of September 2025. The most popular departure time for this route is 6:00AM, with 45% of flights per day taking off at noon.

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

As of September 2025, 625 flights take off from St. Louis and land in United States each week. The most common flight departure day for this route is Mon, with 19% of weekly flights taking off on this day.

What airlines fly to United States?

Frontier, Southwest and American Airlines are the top three most popular airlines that fly to United States from St. Louis according to our data. Frontier is the first choice among our users, with 37% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 10 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.

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

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

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

Prices for flights from Lambert-St Louis Airport to United States refresh daily.

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

As of September 2025, there are 9 operators available to choose from for flights from Lambert-St Louis Airport to United States.

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

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 Lambert-St Louis Airport to United States.

What documentation or ID do you need to fly to United States?

The required travel and health documents for your United States 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 United States. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$36 Cheap Flights from St. Louis to the United States in 2025/26

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

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

8:40 pm - 10:10 pmSTL-DEN

2h 30mnonstop

6:00 am - 9:07 amDEN-STL

2h 07mnonstop

$75Frontier

Find Deal

Thu, Oct 30 - Wed, Nov 5

7:52 pm - 9:20 pmSTL-DEN

2h 28mnonstop

6:00 am - 9:07 amDEN-STL

2h 07mnonstop

$81Frontier

Find Deal

Sat, Oct 11 - Mon, Oct 13

5:20 am - 7:18 amSTL-DFW

1h 58mnonstop

7:00 am - 8:53 amDFW-STL

1h 53mnonstop

$139American Airlines

Find Deal

Sat, Oct 18 - Tue, Oct 21

5:20 am - 7:18 amSTL-DFW

1h 58mnonstop

7:00 am - 8:53 amDFW-STL

1h 53mnonstop

$159American Airlines

Find Deal

Tue, Oct 7 - Sat, Oct 11

5:15 am - 6:35 amSTL-PHX

3h 20mnonstop

4:15 pm - 9:10 pmPHX-STL

2h 55mnonstop

$174Southwest

Find Deal

Thu, Oct 23 - Sat, Oct 25

5:15 pm - 12:29 amSTL-MIA

6h 14m1 stop

8:11 am - 12:35 pmMIA-STL

5h 24m1 stop

$197Delta

Find Deal

Sat, Nov 1 - Sat, Nov 8

11:49 am - 3:12 pmSTL-EWR

2h 23mnonstop

9:46 pm - 11:44 pmEWR-STL

2h 58mnonstop

$197United Airlines

Find Deal

Tue, Nov 11 - Tue, Nov 18

7:05 am - 1:11 pmSTL-MIA

5h 06m1 stop

6:00 am - 12:35 pmMIA-STL

7h 35m1 stop

$198Delta

Find Deal

Tue, Oct 14 - Tue, Oct 21

7:00 am - 10:29 amSTL-EWR

2h 29mnonstop

10:01 am - 2:25 pmEWR-STL

5h 24m1 stop

$207United Airlines

Find Deal

Tue, Nov 11 - Tue, Nov 18

1:45 pm - 10:05 pmSTL-LGA

7h 20m2 stops

5:30 am - 7:15 amLGA-STL

2h 45mnonstop

$212Southwest

Find Deal

Sat, Nov 1 - Sun, Nov 2

Delta flights from St. Louis to United States

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

Delta

Nov 1

STL5:15 pmLambert-St Louis

6h 14m

1 stop

MIA12:29 amMiami

Nov 8

MIA8:11 amMiami

5h 24m

1 stop

STL12:35 pmLambert-St Louis

$197

Find similar

Delta

Oct 14

STL7:05 amLambert-St Louis

5h 06m

1 stop

MIA1:11 pmMiami

Oct 21

MIA6:00 amMiami

7h 35m

1 stop

STL12:35 pmLambert-St Louis

$198

Find similar

Delta

Oct 7

STL11:21 amLambert-St Louis

4h 49m

1 stop

MIA5:10 pmMiami

Oct 14

MIA6:00 amMiami

5h 26m

1 stop

STL10:26 amLambert-St Louis

$199

Find similar

American Airlines flights from St. Louis to United States

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

American Airlines

Oct 18

STL5:20 amLambert-St Louis

1h 58m

DFW7:18 amDallas/Fort Worth

Oct 21

DFW7:00 amDallas/Fort Worth

1h 53m

STL8:53 amLambert-St Louis

$139

Find similar

American Airlines

Oct 7

STL5:20 amLambert-St Louis

1h 58m

DFW7:18 amDallas/Fort Worth

Oct 11

DFW7:00 amDallas/Fort Worth

1h 53m

STL8:53 amLambert-St Louis

$159

Find similar

American Airlines

Oct 14

STL5:23 amLambert-St Louis

2h 47m

MIA9:10 amMiami

Oct 21

MIA10:01 pmMiami

2h 55m

STL11:56 pmLambert-St Louis

$169

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Thu 10/30

8:40 pm-10:10 pm

Nonstop2h 30m

Denver Intl

Wed 11/5

6:00 am-9:07 am

Nonstop2h 07m

$75

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Sat 10/11

7:52 pm-9:20 pm

Nonstop2h 28m

Denver Intl

Mon 10/13

6:00 am-9:07 am

Nonstop2h 07m

$81

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Sat 10/18

5:20 am-7:18 am

Nonstop1h 58m

Dallas/Fort Worth

Tue 10/21

7:00 am-8:53 am

Nonstop1h 53m

$139

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Tue 10/7

5:20 am-7:18 am

Nonstop1h 58m

Dallas/Fort Worth

Sat 10/11

7:00 am-8:53 am

Nonstop1h 53m

$159

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Thu 10/23

5:15 am-6:35 am

Nonstop3h 20m

Phoenix Sky Harbor Intl

Sat 10/25

4:15 pm-9:10 pm

Nonstop2h 55m

$174

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Sat 11/1

5:15 pm-12:29 am

1 stop6h 14m

Miami

Sat 11/8

8:11 am-12:35 pm

1 stop5h 24m

$197

St. LouisNewark

STL - EWR

STLEWR

Lambert-St Louis

Tue 11/11

11:49 am-3:12 pm

Nonstop2h 23m

Newark

Tue 11/18

9:46 pm-11:44 pm

Nonstop2h 58m

$197

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Tue 10/14

7:05 am-1:11 pm

1 stop5h 06m

Miami

Tue 10/21

6:00 am-12:35 pm

1 stop7h 35m

$198

St. LouisNewark

STL - EWR

STLEWR

Lambert-St Louis

Tue 11/11

7:00 am-10:29 am

Nonstop2h 29m

Newark

Tue 11/18

10:01 am-2:25 pm

1 stop5h 24m

$207

St. LouisNew York

STL - LGA

STLLGA

Lambert-St Louis

Sat 11/1

1:45 pm-10:05 pm

2 stops7h 20m

New York LaGuardia

Sun 11/2

5:30 am-7:15 am

Nonstop2h 45m

$212

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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 United States?

In general, April is the cheapest month to fly from St. Louis to United States. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $261. If you aren’t able to travel during the month of April, then book flights to United States from St. Louis during August instead. Flights to United States in August, while not as cheap as those in April, still average around $284.

What is the cheapest day to depart on your flight to United States?

According to our data, Tuesday is the cheapest day to fly to United States from St. Louis. The lowest ticket price found for a Tuesday departure recently was $346. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $403. These prices are subject to change though, so be sure to set up a Price Alert for flights to United States.

What is the cheapest time of day to depart on your flight to United States?

The cheapest time of day to fly to United States is at noon when flights can be purchased for as low as $307. Try not to purchase tickets in the afternoon because they tend to be around $405. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

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

How far in advance should I book a flight to United States?

You are more likely to see cheaper flights to United States from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to United States for around $325 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United States from St. Louis for as low as $224 on momondo.

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

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

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

Cheap St. Louis to United States flight deals and tips

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

Best Price Found	$93
Fastest flight time	1h 50m
Direct flights	Every day
Airports in United States	1 airport

The best one-way flight to United States from St. Louis in the past 72 hours is $93. The best round-trip flight deal from St. Louis to United States found on momondo in the last 72 hours is $78.

The fastest flight from St. Louis to United States takes 1h 50m

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

There is 1 airport near United States: Dallas/Fort Worth (DFW)

Search flight deals

When did momondo last update prices for flights from Lambert-St Louis Airport to United States?
Prices for flights from Lambert-St Louis Airport to United States refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to United States?
As of September 2025, there are 9 operators available to choose from for flights from Lambert-St Louis Airport to United States.
How old do you have to be to fly from Lambert-St Louis Airport to United States?
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 Lambert-St Louis Airport to United States.
What documentation or ID do you need to fly to United States?
The required travel and health documents for your United States 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 United States. 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 St. Louis to United States?
momondo data reveals that the most frequently booked plane model on the route from St. Louis to United States is Boeing 737-800 Passenger/BBJ2 (winglets), representing 20.02% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 18.68%, Boeing 737-700 Passenger/BBJ1 (winglets) at 11.98%, and Embraer 175 at 8.08%.

Best airlines flying from St. Louis to United States

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $53	Free Cancellation	Rating 5.8 3,173 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $76	Free Cancellation	Rating 6.3 8,023 reviews	Search Spirit Airlines flights
Allegiant Air	PriceFrom $104	Free Cancellation	Rating 7.2 699 reviews	Search Allegiant Air flights
Delta	PriceFrom $128	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights
United Airlines	PriceFrom $154	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
Southwest	PriceFrom $174	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights
Southern / Mokulele	PriceFrom $194	Free Cancellation	Rating 6.3 25 reviews	Search Southern / Mokulele flights
American Airlines	PriceFrom $194	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Alaska Airlines	PriceFrom $296	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights

Why use momondo?

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

Finding the right flight to United States from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to United States quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for St. Louis to United States flights to just show those with flexible booking policies.

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

Once you have performed a search for St. Louis to United States flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to United States from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your United States 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.

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Find better results for your trip to the United States

Popular cities in the United States

Flights to New Yorkfrom $49

Flights to Los Angelesfrom $49

Flights to Miamifrom $49

Flights to Chicagofrom $49

Flights to Orlandofrom $60

Flights to Las Vegasfrom $48

Flights to San Franciscofrom $53

Flights to Washington, D.C.from $49

Flights to Bostonfrom $62

Flights to Atlantafrom $51

Flights to Dallasfrom $68

Flights to Seattlefrom $69

Cheap flights from St. Louis to the United States from $36

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to the United States departing on 10/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

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

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Delta flights from St. Louis to United States

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

American Airlines flights from St. Louis to United States

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

momondo Fare Finder

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

See travel insights to the United States from

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

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 United States?

What is the cheapest day to depart on your flight to United States?

What is the cheapest time of day to depart on your flight to United States?

The cheapest time of day to fly to United States is at noon when flights can be purchased for as low as $307. Try not to purchase tickets in the afternoon because they tend to be around $405. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

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

How far in advance should I book a flight to United States?

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

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

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

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

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

What airlines fly to United States?

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

89 flights are operational daily from St. Louis to United States as of September 2025. The most popular departure time for this route is 6:00AM, with 45% of flights per day taking off at noon.

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

As of September 2025, 625 flights take off from St. Louis and land in United States each week. The most common flight departure day for this route is Mon, with 19% of weekly flights taking off on this day.

Cheap St. Louis to United States flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in United States

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

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

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

What documentation or ID do you need to fly to United States?

What is the most popular plane model from St. Louis to United States?

Best airlines flying from St. Louis to United States

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

Why use momondo?

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

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

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

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

An easier way to manage your United States 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

Popular cities in the United States

Popular flights according to clicks in the last 7 days on momondo