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

According to our data, Southwest have had the least number of delays on this route over the last 12 months; with about 13% of their flights experiencing any sort of delay.

What is the most punctual flight time for St. Louis to the United States 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 many flights depart from St. Louis to United States on average per week?

As of December 2025, 656 flights take off from St. Louis and land in United States each week. The most common flight departure day for this route is Fri, with 18% of weekly flights taking off on this day.

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

93 flights are operational daily from St. Louis to United States as of December 2025. The most popular departure time for this route is 7:00AM, with 41% of flights per day taking off at noon.

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

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

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 40% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 9 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.

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

Historically, on average around 14% of flights between St. Louis and United States have experienced a delay on any given week. The average delay length over the past 12 months has been 130 minutes.

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 December 2025, there are 7 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.

$32 Cheap Flights from St. Louis to the United States in 2025/26

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One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:43 pm - 9:15 pm

STL

DEN

2h 32mnonstop

6:50 am - 10:02 am

DEN

STL

2h 12mnonstop

$76Frontier

vie., feb. 27 - lun., mar. 2

5:11 pm - 8:27 pm

STL

MCO

2h 16mnonstop

9:47 pm - 11:33 pm

MCO

STL

2h 46mnonstop

$77Frontier

dom., ene. 18 - vie., ene. 23

5:11 pm - 8:27 pm

STL

MCO

2h 16mnonstop

8:45 pm - 10:34 pm

MCO

STL

2h 49mnonstop

$78Frontier

dom., ene. 11 - sáb., ene. 17

7:15 am - 9:34 am

STL

DFW

2h 19mnonstop

8:31 am - 6:14 pm

DFW

STL

9h 43m1 stop

$131American Airlines

mié., ene. 21 - mié., ene. 28

5:04 pm - 7:20 pm

STL

DFW

2h 16mnonstop

8:31 am - 6:14 pm

DFW

STL

9h 43m1 stop

$143American Airlines

mar., ene. 20 - vie., feb. 6

5:55 am - 11:05 am

STL

LAX

7h 10m1 stop

5:55 am - 5:10 pm

LAX

STL

9h 15m1 stop

$217Southwest

mar., ene. 6 - sáb., ene. 10

11:35 am - 8:05 pm

STL

MIA

7h 30m1 stop

4:55 pm - 7:00 pm

MIA

STL

3h 05mnonstop

$221Southwest

mar., ene. 20 - vie., ene. 23

6:00 am - 3:40 pm

STL

MIA

8h 40m1 stop

9:00 am - 4:03 pm

MIA

STL

8h 03m1 stop

$231United Airlines

mié., ene. 14 - sáb., ene. 17

1:05 pm - 4:30 pm

STL

LGA

2h 25mnonstop

6:05 pm - 8:06 pm

LGA

STL

3h 01mnonstop

$249Delta

dom., ene. 25 - lun., feb. 2

7:10 am - 12:42 pm

STL

LGA

4h 32m1 stop

10:30 am - 12:33 pm

LGA

STL

3h 03mnonstop

$252Delta

vie., ene. 23 - vie., feb. 6

Southwest flights from St. Louis to United States

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

Southwest

Jan 7

STL9:00 amLambert-St Louis

6h 25m

2 stops

PHX2:25 pmPhoenix Sky Harbor Intl

Jan 14

PHX1:20 pmPhoenix Sky Harbor Intl

2h 50m

STL5:10 pmLambert-St Louis

$179

Find similar

Southwest

Jan 6

STL5:55 amLambert-St Louis

7h 10m

1 stop

LAX11:05 amLos Angeles

Jan 10

LAX5:55 amLos Angeles

9h 15m

1 stop

STL5:10 pmLambert-St Louis

$217

Find similar

Southwest

Jan 20

STL11:35 amLambert-St Louis

7h 30m

1 stop

MIA8:05 pmMiami

Jan 23

MIA4:55 pmMiami

3h 05m

STL7:00 pmLambert-St Louis

$221

Find similar

Delta flights from St. Louis to United States

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

Delta

Jan 29

STL6:57 pmLambert-St Louis

4h 54m

1 stop

MIA12:51 amMiami

Feb 4

MIA8:15 amMiami

4h 39m

1 stop

STL11:54 amLambert-St Louis

$235

Find similar

Delta

Jan 13

STL11:23 amLambert-St Louis

7h 26m

1 stop

LAX4:49 pmLos Angeles

Jan 17

LAX3:20 pmLos Angeles

6h 05m

1 stop

STL11:25 pmLambert-St Louis

$237

Find similar

Delta

Jan 30

STL6:57 pmLambert-St Louis

4h 54m

1 stop

MIA12:51 amMiami

Feb 4

MIA8:15 amMiami

4h 39m

1 stop

STL11:54 amLambert-St Louis

$240

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

vie. 2/27

7:43 pm-9:15 pm

Nonstop2h 32m

Denver Intl

lun. 3/2

6:50 am-10:02 am

Nonstop2h 12m

$76

St. LouisOrlando

STL - MCO

STLMCO

Lambert-St Louis

dom. 1/18

5:11 pm-8:27 pm

Nonstop2h 16m

Orlando

vie. 1/23

9:47 pm-11:33 pm

Nonstop2h 46m

$77

St. LouisOrlando

STL - MCO

STLMCO

Lambert-St Louis

dom. 1/11

5:11 pm-8:27 pm

Nonstop2h 16m

Orlando

sáb. 1/17

8:45 pm-10:34 pm

Nonstop2h 49m

$78

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

mié. 1/21

7:15 am-9:34 am

Nonstop2h 19m

Dallas/Fort Worth

mié. 1/28

8:31 am-6:14 pm

1 stop9h 43m

$131

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

mar. 1/20

5:04 pm-7:20 pm

Nonstop2h 16m

Dallas/Fort Worth

vie. 2/6

8:31 am-6:14 pm

1 stop9h 43m

$143

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

mar. 1/6

5:55 am-11:05 am

1 stop7h 10m

Los Angeles

sáb. 1/10

5:55 am-5:10 pm

1 stop9h 15m

$217

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

mar. 1/20

11:35 am-8:05 pm

1 stop7h 30m

Miami

vie. 1/23

4:55 pm-7:00 pm

Nonstop3h 05m

$221

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

mié. 1/14

6:00 am-3:40 pm

1 stop8h 40m

Miami

sáb. 1/17

9:00 am-4:03 pm

1 stop8h 03m

$231

St. LouisNew York

STL - LGA

STLLGA

Lambert-St Louis

dom. 1/25

1:05 pm-4:30 pm

Nonstop2h 25m

New York LaGuardia

lun. 2/2

6:05 pm-8:06 pm

Nonstop3h 01m

$249

St. LouisNew York

STL - LGA

STLLGA

Lambert-St Louis

vie. 1/23

7:10 am-12:42 pm

1 stop4h 32m

New York LaGuardia

vie. 2/6

10:30 am-12:33 pm

Nonstop3h 03m

$252

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

Delays

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 $263. If you aren’t able to travel during the month of April, then book flights to United States from St. Louis during September instead. Flights to United States in September, while not as cheap as those in April, still average around $281.

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

According to our data, Wednesday is the cheapest day to fly to United States from St. Louis. The lowest ticket price found for a Wednesday departure recently was $333. 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 $429. 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 $310. Try not to purchase tickets in the afternoon because they tend to be around $394. 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 $323 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 $217 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	$73
Fastest flight time	1h 05m
Direct flights	Every day
Airports in United States	2 airports

The best one-way flight to United States from St. Louis in the past 72 hours is $73. The best round-trip flight deal from St. Louis to United States found on momondo in the last 72 hours is $139.

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

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

There are 2 airports near United States: Dallas/Fort Worth (DFW), New York LaGuardia (LGA)

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 December 2025, there are 7 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 MAX 8, representing 21.43% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 18.55%, Boeing 737-700 Passenger/BBJ1 (winglets) at 11.56%, and Embraer 175 at 7.59%.

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 $50	Free Cancellation	Rating 5.8 3,092 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $69	Free Cancellation	Rating 6.3 8,158 reviews	Search Spirit Airlines flights
Delta	PriceFrom $128	Free Cancellation	Rating 7.9 8,010 reviews	Search Delta flights
United Airlines	PriceFrom $150	Free Cancellation	Rating 7.4 9,065 reviews	Search United Airlines flights
American Airlines	PriceFrom $158	Free Cancellation	Rating 7.2 11,045 reviews	Search American Airlines flights
Southwest	PriceFrom $176	Free Cancellation	Rating 8.0 4,255 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $257	Free Cancellation	Rating 8.0 11,401 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.

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Popular cities in the United States

Flights to New Yorkfrom $48

Flights to Los Angelesfrom $49

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Flights to Chicagofrom $47

Flights to Orlandofrom $47

Flights to San Franciscofrom $49

Flights to Las Vegasfrom $40

Flights to Washington, D.C.from $41

Flights to Bostonfrom $57

Flights to Atlantafrom $48

Flights to Dallasfrom $52

Flights to Seattlefrom $56

Cheap flights from St. Louis to the United States from $32

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 2/4. 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 St. Louis to the United States

Cheap round-trip flights

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Southwest flights from St. Louis to United States

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

Delta flights from St. Louis to United States

Our best Delta 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 $310. Try not to purchase tickets in the afternoon because they tend to be around $394. 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, United Airlines, and American Airlines are the most popular carriers operating from Lambert-St Louis to United States

What airlines fly to United States?

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

Historically, on average around 14% of flights between St. Louis and United States have experienced a delay on any given week. The average delay length over the past 12 months has been 130 minutes.

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

According to our data, Southwest have had the least number of delays on this route over the last 12 months; with about 13% of their flights experiencing any sort of delay.

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

93 flights are operational daily from St. Louis to United States as of December 2025. The most popular departure time for this route is 7:00AM, with 41% of flights per day taking off at noon.

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

As of December 2025, 656 flights take off from St. Louis and land in United States each week. The most common flight departure day for this route is Fri, with 18% 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