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Cheap flights from North America to St. Louis from $24

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 12/6. 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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Find the cheapest flights from North America to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:05 am - 10:14 amDEN-STL
2h 09mnonstop
Frontier Logo
1:16 pm - 3:58 amSTL-DEN
15h 42m1 stop
$104Frontier
Find Deal
Fri, Dec 12 - Mon, Dec 15
Frontier Logo
6:50 am - 10:02 amDEN-STL
2h 12mnonstop
Frontier Logo
5:11 pm - 11:23 amSTL-DEN
19h 12m1 stop
$108Frontier
Find Deal
Wed, Jan 7 - Tue, Jan 13
American Airlines Logo
5:40 pm - 7:22 pmDFW-STL
1h 42mnonstop
American Airlines Logo
7:00 am - 9:11 amSTL-DFW
2h 11mnonstop
$139American Airlines
Find Deal
Thu, Dec 25 - Thu, Jan 1
American Airlines Logo
8:49 am - 10:36 amDFW-STL
1h 47mnonstop
American Airlines Logo
1:20 pm - 3:22 pmSTL-DFW
2h 02mnonstop
$154American Airlines
Find Deal
Wed, Dec 10 - Wed, Dec 10
United Airlines Logo
8:20 am - 12:29 pmIAD-STL
5h 09m1 stop
United Airlines Logo
12:44 pm - 3:55 pmSTL-IAD
2h 11mnonstop
$245United Airlines
Find Deal
Wed, Jan 28 - Tue, Feb 3
Delta Logo
7:25 am - 9:35 pmSEA-STL
12h 10m2 stops
Delta Logo
6:35 am - 2:21 pmSTL-SEA
9h 46m1 stop
$252Delta
Find Deal
Thu, Jan 8 - Fri, Jan 9
Delta Logo
6:55 am - 10:24 amIAD-STL
4h 29m1 stop
Delta Logo
6:00 am - 11:49 amSTL-IAD
4h 49m1 stop
$255Delta
Find Deal
Sat, Dec 13 - Sat, Jan 17
United Airlines Logo
8:15 am - 12:25 pmIAD-STL
5h 10m1 stop
United Airlines Logo
6:30 am - 11:49 amSTL-IAD
4h 19m1 stop
$257United Airlines
Find Deal
Thu, Feb 19 - Sat, Feb 21
Southwest Logo
12:30 pm - 5:50 pmLGA-STL
6h 20m1 stop
Southwest Logo
7:50 pm - 11:05 pmSTL-LGA
2h 15mnonstop
$286Southwest
Find Deal
Thu, Jan 15 - Sun, Jan 18
Southwest Logo
6:00 am - 12:55 pmLGA-STL
7h 55m1 stop
Southwest Logo
5:45 pm - 9:05 pmSTL-LGA
2h 20mnonstop
$291Southwest
Find Deal
Sat, Jan 24 - Sat, Jan 24

Frontier flights from North America to St. Louis

Our best Frontier deals on North America to St. Louis flight tickets
Frontier
Dec 12
DEN7:05 amDenver Intl
2h 09m
STL10:14 amLambert-St Louis
Dec 15
STL1:16 pmLambert-St Louis
15h 42m
1 stop
DEN3:58 amDenver Intl
$104
Find similar
Frontier
Jan 7
DEN6:50 amDenver Intl
2h 12m
STL10:02 amLambert-St Louis
Jan 13
STL5:11 pmLambert-St Louis
19h 12m
1 stop
DEN11:23 amDenver Intl
$108
Find similar
Frontier
Jan 8
DEN8:00 amDenver Intl
27h 12m
1 stop
STL12:12 pmLambert-St Louis
Jan 12
STL8:21 pmLambert-St Louis
19h 04m
1 stop
DEN2:25 pmDenver Intl
$110
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Southwest flights from North America to St. Louis

Our best Southwest deals on North America to St. Louis flight tickets
Southwest
Dec 17
SEA8:10 amSeattle/Tacoma Intl
9h 35m
2 stops
STL7:45 pmLambert-St Louis
Dec 18
STL5:25 amLambert-St Louis
8h 40m
1 stop
SEA12:05 pmSeattle/Tacoma Intl
$267
Find similar
Southwest
Dec 11
SEA5:15 amSeattle/Tacoma Intl
10h 00m
2 stops
STL5:15 pmLambert-St Louis
Dec 16
STL1:05 pmLambert-St Louis
10h 45m
2 stops
SEA9:50 pmSeattle/Tacoma Intl
$272
Find similar
Southwest
Dec 25
SEA5:40 amSeattle/Tacoma Intl
5h 40m
1 stop
STL1:20 pmLambert-St Louis
Jan 1
STL6:00 amLambert-St Louis
8h 05m
1 stop
SEA12:05 pmSeattle/Tacoma Intl
$273
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from North America to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 20, 2025.
Use the filters below to find and compare flights from North America to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverSt. Louis

DEN - STL

DENSTL

Denver Intl

Fri 12/12

7:05 am-10:14 am

Nonstop2h 09m

Lambert-St Louis

Mon 12/15

1:16 pm-3:58 am

1 stop15h 42m

$104

DenverSt. Louis

DEN - STL

DENSTL

Denver Intl

Wed 1/7

6:50 am-10:02 am

Nonstop2h 12m

Lambert-St Louis

Tue 1/13

5:11 pm-11:23 am

1 stop19h 12m

$108

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Thu 12/25

5:40 pm-7:22 pm

Nonstop1h 42m

Lambert-St Louis

Thu 1/1

7:00 am-9:11 am

Nonstop2h 11m

$139

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Wed 12/10

8:49 am-10:36 am

Nonstop1h 47m

Lambert-St Louis

Wed 12/10

1:20 pm-3:22 pm

Nonstop2h 02m

$154

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Wed 1/28

8:20 am-12:29 pm

1 stop5h 09m

Lambert-St Louis

Tue 2/3

12:44 pm-3:55 pm

Nonstop2h 11m

$245

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Thu 1/8

7:25 am-9:35 pm

2 stops12h 10m

Lambert-St Louis

Fri 1/9

6:35 am-2:21 pm

1 stop9h 46m

$252

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 12/13

6:55 am-10:24 am

1 stop4h 29m

Lambert-St Louis

Sat 1/17

6:00 am-11:49 am

1 stop4h 49m

$255

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 2/19

8:15 am-12:25 pm

1 stop5h 10m

Lambert-St Louis

Sat 2/21

6:30 am-11:49 am

1 stop4h 19m

$257

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Thu 1/15

12:30 pm-5:50 pm

1 stop6h 20m

Lambert-St Louis

Sun 1/18

7:50 pm-11:05 pm

Nonstop2h 15m

$286

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Sat 1/24

6:00 am-12:55 pm

1 stop7h 55m

Lambert-St Louis

Sat 1/24

5:45 pm-9:05 pm

Nonstop2h 20m

$291

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

In general, March 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 $300. The month of January is another great option to travel to St. Louis, with average flight prices from North America averaging around $305.

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 $319. 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 $439. 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 $344 when looking at flights departing in the morning. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $377 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

$89

Fastest flight time

1h 40m

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 $89. The best round-trip flight deal from North America to St. Louis found on momondo in the last 72 hours is $61.
The fastest flight from North America to St. Louis takes 1h 40m
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?

  • 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?

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
FrontierPriceFrom $65Free CancellationRating
5.8
3,104 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $80Free CancellationRating
6.3
8,156 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $133Free CancellationRating
7.2
11,045 reviews
Search American Airlines flights
United AirlinesPriceFrom $166Free CancellationRating
7.4
9,027 reviews
Search United Airlines flights
DeltaPriceFrom $168Free CancellationRating
7.9
8,002 reviews
Search Delta flights
SouthwestPriceFrom $186Free CancellationRating
8.0
4,249 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $257Free CancellationRating
8.0
11,321 reviews
Search Alaska Airlines flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
Eureka
Litchfield
Shrewsbury

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

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