What is the cheapest airline that flies from North America to Lambert-St Louis?

Frontier, Southwest, and American Airlines are the most popular carriers operating from North America to Lambert-St Louis

What airlines fly to St. Louis?

Southwest, Frontier and United Airlines are the top three most popular airlines that fly to St. Louis from North America according to our data. Southwest is the first choice among our users, with 30% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 8 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

How many flights depart from North America to St. Louis on average per week?

As of September 2025, there are 877 flights per week flying from North America to St. Louis. The most common day of the week flights depart is Mon, with 17% of flights taking off on this day.

How many flights depart from North America to St. Louis on average per day?

As of September 2025, there are 125 flights per day flying from North America to St. Louis. The most common time of day flights depart is 5:00PM, with 41% of flights taking off in the afternoon.

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

Prices for flights from North America to Lambert-St Louis Airport refresh daily.

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

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

How old do you have to be to fly from North America 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 North America to Lambert-St Louis Airport.

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

The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$35 Cheap Flights from North America to St. Louis in 2025/26

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Find the cheapest flights from North America to St. Louis

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

6:50 am - 10:02 amDEN-STL

2h 12mnonstop

7:43 pm - 9:15 pmSTL-DEN

2h 32mnonstop

$96Frontier

Find Deal

Fri, Dec 5 - Mon, Dec 8

6:00 am - 9:07 amDEN-STL

2h 07mnonstop

7:45 pm - 9:13 pmSTL-DEN

2h 28mnonstop

$100Frontier

Find Deal

Wed, Nov 12 - Fri, Nov 14

8:45 pm - 11:58 pmDEN-STL

2h 13mnonstop

1:40 pm - 3:00 pmSTL-DEN

2h 20mnonstop

$131United Airlines

Find Deal

Fri, Oct 10 - Tue, Oct 14

7:00 am - 8:53 amDFW-STL

1h 53mnonstop

8:49 am - 10:46 amSTL-DFW

1h 57mnonstop

$139American Airlines

Find Deal

Sat, Oct 25 - Tue, Oct 28

6:59 pm - 8:53 pmDFW-STL

1h 54mnonstop

5:58 pm - 8:05 pmSTL-DFW

2h 07mnonstop

$140American Airlines

Find Deal

Tue, Oct 28 - Tue, Nov 4

8:45 pm - 11:58 pmDEN-STL

2h 13mnonstop

5:15 am - 6:53 amSTL-DEN

2h 38mnonstop

$144United Airlines

Find Deal

Fri, Oct 10 - Mon, Oct 13

12:10 pm - 5:10 pmDEN-STL

4h 00m1 stop

8:50 pm - 12:40 amSTL-DEN

4h 50m1 stop

$162Southwest

Find Deal

Sat, Oct 25 - Sun, Oct 26

5:40 pm - 12:15 amDEN-STL

5h 35m1 stop

6:40 pm - 11:50 pmSTL-DEN

6h 10m1 stop

$167Southwest

Find Deal

Sat, Nov 22 - Sun, Nov 23

11:15 am - 7:06 pmSEA-STL

5h 51m1 stop

2:36 pm - 10:15 pmSTL-SEA

9h 39m1 stop

$177Delta

Find Deal

Wed, Dec 3 - Tue, Dec 9

1:39 pm - 11:28 pmSEA-STL

7h 49m1 stop

6:00 am - 10:54 amSTL-SEA

6h 54m1 stop

$185Delta

Find Deal

Wed, Dec 3 - Sun, Dec 14

Frontier flights from North America to St. Louis

Our best Frontier deals on North America to St. Louis flight tickets

Frontier

Dec 5

DEN6:50 amDenver Intl

2h 12m

STL10:02 amLambert-St Louis

Dec 8

STL7:43 pmLambert-St Louis

2h 32m

DEN9:15 pmDenver Intl

$96

Find similar

Frontier

Nov 12

DEN6:00 amDenver Intl

2h 07m

STL9:07 amLambert-St Louis

Nov 14

STL7:45 pmLambert-St Louis

2h 28m

DEN9:13 pmDenver Intl

$100

Find similar

Frontier

Sep 26

DEN6:00 amDenver Intl

2h 06m

STL9:06 amLambert-St Louis

Sep 26

STL7:55 pmLambert-St Louis

2h 25m

DEN9:20 pmDenver Intl

$101

Find similar

Alaska Airlines flights from North America to St. Louis

Our best Alaska Airlines deals on North America to St. Louis flight tickets

Alaska Airlines

Dec 6

SEA8:34 amSeattle/Tacoma Intl

3h 53m

STL2:27 pmLambert-St Louis

Dec 13

STL7:00 amLambert-St Louis

4h 40m

SEA9:40 amSeattle/Tacoma Intl

$237

Find similar

Alaska Airlines

Oct 24

SEA6:02 pmSeattle/Tacoma Intl

4h 01m

STL12:03 amLambert-St Louis

Oct 26

STL7:00 amLambert-St Louis

4h 33m

SEA9:33 amSeattle/Tacoma Intl

$257

Find similar

Alaska Airlines

Sep 29

SEA12:59 amSeattle/Tacoma Intl

6h 27m

1 stop

STL9:26 amLambert-St Louis

Oct 7

STL7:00 amLambert-St Louis

8h 31m

1 stop

SEA1:31 pmSeattle/Tacoma Intl

$441

Find similar

Fly from

Fly to

Route

Depart

Return

Price

DenverSt. Louis

DEN - STL

DENSTL

Denver Intl

Fri 12/5

6:50 am-10:02 am

Nonstop2h 12m

Lambert-St Louis

Mon 12/8

7:43 pm-9:15 pm

Nonstop2h 32m

$96

DenverSt. Louis

DEN - STL

DENSTL

Denver Intl

Wed 11/12

6:00 am-9:07 am

Nonstop2h 07m

Lambert-St Louis

Fri 11/14

7:45 pm-9:13 pm

Nonstop2h 28m

$100

DenverSt. Louis

DEN - STL

DENSTL

Denver Intl

Fri 10/10

8:45 pm-11:58 pm

Nonstop2h 13m

Lambert-St Louis

Tue 10/14

1:40 pm-3:00 pm

Nonstop2h 20m

$131

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Sat 10/25

7:00 am-8:53 am

Nonstop1h 53m

Lambert-St Louis

Tue 10/28

8:49 am-10:46 am

Nonstop1h 57m

$139

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Tue 10/28

6:59 pm-8:53 pm

Nonstop1h 54m

Lambert-St Louis

Tue 11/4

5:58 pm-8:05 pm

Nonstop2h 07m

$140

DenverSt. Louis

DEN - STL

DENSTL

Denver Intl

Fri 10/10

8:45 pm-11:58 pm

Nonstop2h 13m

Lambert-St Louis

Mon 10/13

5:15 am-6:53 am

Nonstop2h 38m

$144

DenverSt. Louis

DEN - STL

DENSTL

Denver Intl

Sat 10/25

12:10 pm-5:10 pm

1 stop4h 00m

Lambert-St Louis

Sun 10/26

8:50 pm-12:40 am

1 stop4h 50m

$162

DenverSt. Louis

DEN - STL

DENSTL

Denver Intl

Sat 11/22

5:40 pm-12:15 am

1 stop5h 35m

Lambert-St Louis

Sun 11/23

6:40 pm-11:50 pm

1 stop6h 10m

$167

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Wed 12/3

11:15 am-7:06 pm

1 stop5h 51m

Lambert-St Louis

Tue 12/9

2:36 pm-10:15 pm

1 stop9h 39m

$177

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Wed 12/3

1:39 pm-11:28 pm

1 stop7h 49m

Lambert-St Louis

Sun 12/14

6:00 am-10:54 am

1 stop6h 54m

$185

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 North America 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, January is the cheapest month to fly from North America 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 North America averaging around $308.

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 $328. 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 $433. 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 North America in the morning is the least expensive time of day to depart. momondo users have found prices as low as $348 when looking at flights departing in the morning. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $385 per ticket.

What is the cheapest North America to Lambert-St Louis flight route?

Fly from Atlanta Hartsfield-Jackson to Lambert-St Louis for the best North America - Lambert-St Louis flight prices

What cabin class options are available on North America to Lambert-St Louis flights?

There are 4 cabin classes available to choose from on North America 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 North America to St. Louis flights?

No. A direct flight is the cheapest option for a flight between North America to St. Louis.

Cheap North America to St. Louis flight deals and tips

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

Best Price Found	$79
Fastest flight time	1h 36m
Direct flights	Every day
Airports in St. Louis	1 airport

The best one-way flight to St. Louis from North America in the past 72 hours is $79. The best round-trip flight deal from North America to St. Louis found on momondo in the last 72 hours is $105.

The fastest flight from North America to St. Louis takes 1h 36m

Direct flights go from North America 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 North America to Lambert-St Louis Airport?
Prices for flights from North America to Lambert-St Louis Airport refresh daily.
How many operators does momondo search for flights from North America to Lambert-St Louis Airport?
As of September 2025, there are 9 operators available to choose from for flights from North America to Lambert-St Louis Airport.
How old do you have to be to fly from North America 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 North America to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from North America to St. Louis?
Based on momondo bookings for flights between North America and St. Louis, the leading plane model is Boeing 737-800 Passenger/BBJ2 (winglets), making up 17.03% of the total bookings. Other popular models include Boeing 737 MAX 8 with 14.92%, Boeing 737-700 Passenger/BBJ1 (winglets) with 11.48%, and Embraer 175 with 10.75%.

Best airlines flying from North America to St. Louis

Compare and see reviews for airlines that fly from North America to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $57	Free Cancellation	Rating 5.8 3,172 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $83	Free Cancellation	Rating 6.3 8,015 reviews	Search Spirit Airlines flights
American Airlines	PriceFrom $133	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $154	Free Cancellation	Rating 7.4 8,929 reviews	Search United Airlines flights
Southwest	PriceFrom $173	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights
Delta	PriceFrom $181	Free Cancellation	Rating 7.9 7,954 reviews	Search Delta flights
Southern / Mokulele	PriceFrom $194	Free Cancellation	Rating 6.3 25 reviews	Search Southern / Mokulele flights
Alaska Airlines	PriceFrom $257	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights

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O'Fallon

Fenton

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Alton

St. Peters

Farmington

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Why use momondo?

Why should I use momondo to find a flight deal from North America to St. Louis?

It is quick and easy to find North America to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

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

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

How can momondo help me find flights from North America 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 North America to St. Louis.

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

Yes momondo offers price alerts on flights to St. Louis from North America. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when 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.

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Cheap flights from North America to St. Louis from $35

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from North America to St. Louis departing on 9/28. 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

Trusted and free

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Price Alerts

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Find the cheapest flights from North America to St. Louis

Cheap round-trip flights

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Cheap last minute flights

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Frontier flights from North America to St. Louis

Our best Frontier deals on North America to St. Louis flight tickets

Alaska Airlines flights from North America to St. Louis

Our best Alaska Airlines deals on North America to St. Louis flight tickets

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

See travel insights to St. Louis from

How to get the cheapest flight ticket from North America 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 North America to Lambert-St Louis flight route?

Fly from Atlanta Hartsfield-Jackson to Lambert-St Louis for the best North America - Lambert-St Louis flight prices

What cabin class options are available on North America to Lambert-St Louis flights?

There are 4 cabin classes available to choose from on North America 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 North America to St. Louis flights?

No. A direct flight is the cheapest option for a flight between North America to St. Louis.

What is the cheapest airline that flies from North America to Lambert-St Louis?

Frontier, Southwest, and American Airlines are the most popular carriers operating from North America to Lambert-St Louis

What airlines fly to St. Louis?

How many flights depart from North America to St. Louis on average per day?

As of September 2025, there are 125 flights per day flying from North America to St. Louis. The most common time of day flights depart is 5:00PM, with 41% of flights taking off in the afternoon.

How many flights depart from North America to St. Louis on average per week?

As of September 2025, there are 877 flights per week flying from North America to St. Louis. The most common day of the week flights depart is Mon, with 17% of flights taking off on this day.

Cheap North America to St. Louis flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in St. Louis

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

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

How old do you have to be to fly from North America 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 North America to St. Louis?

Best airlines flying from North America to St. Louis

Compare and see reviews for airlines that fly from North America 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 North America to St. Louis?

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

How can momondo help me find flights from North America to St. Louis?

I’m not ready to book a flight from North America 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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