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Cheap flights from North America to St. Louis from $20

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 12/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
10:15 am - 11:07 amATL-STL
1h 52mnonstop
Frontier Logo
10:42 am - 1:27 pmSTL-ATL
1h 45mnonstop
$92Frontier
Find Deal
Thu, Dec 4 - Sun, Dec 7
Frontier Logo
8:55 am - 9:47 amATL-STL
1h 52mnonstop
Frontier Logo
3:30 pm - 9:41 pmSTL-ATL
5h 11m1 stop
$93Frontier
Find Deal
Fri, Dec 5 - Mon, Dec 8
American Airlines Logo
2:54 pm - 4:34 pmDFW-STL
1h 40mnonstop
American Airlines Logo
5:30 pm - 7:40 pmSTL-DFW
2h 10mnonstop
$149American Airlines
Find Deal
Sat, Dec 13 - Wed, Dec 17
American Airlines Logo
9:45 am - 4:16 pmDCA-STL
7h 31m1 stop
American Airlines Logo
8:41 am - 11:54 amSTL-DCA
2h 13mnonstop
$245American Airlines
Find Deal
Tue, Dec 2 - Sat, Dec 6
United Airlines Logo
9:00 am - 10:50 amEWR-STL
2h 50mnonstop
United Airlines Logo
6:35 pm - 12:26 amSTL-EWR
4h 51m1 stop
$251United Airlines
Find Deal
Tue, Dec 16 - Tue, Dec 23
Delta Logo
6:00 am - 9:50 amIAD-STL
4h 50m1 stop
Delta Logo
11:40 am - 5:00 pmSTL-IAD
4h 20m1 stop
$255Delta
Find Deal
Tue, Dec 2 - Tue, Dec 9
Delta Logo
1:42 pm - 6:33 pmDCA-STL
5h 51m1 stop
Delta Logo
6:05 pm - 11:08 pmSTL-DCA
4h 03m1 stop
$255Delta
Find Deal
Tue, Dec 2 - Tue, Dec 9
Southwest Logo
8:15 am - 9:35 amDCA-STL
2h 20mnonstop
Southwest Logo
1:10 pm - 4:10 pmSTL-DCA
2h 00mnonstop
$263Southwest
Find Deal
Thu, Dec 25 - Thu, Dec 25
Southwest Logo
8:00 am - 9:35 amDCA-STL
2h 35mnonstop
Southwest Logo
3:50 pm - 6:50 pmSTL-DCA
2h 00mnonstop
$265Southwest
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Thu, Jan 22 - Sat, Jan 24
United Airlines Logo
8:40 am - 10:13 amIAD-STL
2h 33mnonstop
United Airlines Logo
8:30 am - 11:40 amSTL-IAD
2h 10mnonstop
$265United Airlines
Find Deal
Thu, Jan 22 - 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 4
ATL10:15 amAtlanta Hartsfield-Jackson
1h 52m
STL11:07 amLambert-St Louis
Dec 7
STL10:42 amLambert-St Louis
1h 45m
ATL1:27 pmAtlanta Hartsfield-Jackson
$92
Find similar
Frontier
Dec 5
ATL8:55 amAtlanta Hartsfield-Jackson
1h 52m
STL9:47 amLambert-St Louis
Dec 8
STL3:30 pmLambert-St Louis
5h 11m
1 stop
ATL9:41 pmAtlanta Hartsfield-Jackson
$93
Find similar
Frontier
Dec 5
ATL8:55 amAtlanta Hartsfield-Jackson
1h 52m
STL9:47 amLambert-St Louis
Dec 7
STL10:42 amLambert-St Louis
1h 45m
ATL1:27 pmAtlanta Hartsfield-Jackson
$94
Find similar

American Airlines flights from North America to St. Louis

Our best American Airlines deals on North America to St. Louis flight tickets
American Airlines
Dec 13
DFW2:54 pmDallas/Fort Worth
1h 40m
STL4:34 pmLambert-St Louis
Dec 17
STL5:30 pmLambert-St Louis
2h 10m
DFW7:40 pmDallas/Fort Worth
$149
Find similar
American Airlines
Nov 24
DFW9:04 pmDallas/Fort Worth
1h 55m
STL10:59 pmLambert-St Louis
Dec 15
STL7:00 amLambert-St Louis
2h 16m
DFW9:16 amDallas/Fort Worth
$169
Find similar
American Airlines
Nov 24
DFW8:49 amDallas/Fort Worth
1h 50m
STL10:39 amLambert-St Louis
Dec 12
STL5:14 amLambert-St Louis
2h 09m
DFW7:23 amDallas/Fort Worth
$179
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 17, 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

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 12/4

10:15 am-11:07 am

Nonstop1h 52m

Lambert-St Louis

Sun 12/7

10:42 am-1:27 pm

Nonstop1h 45m

$92

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Fri 12/5

8:55 am-9:47 am

Nonstop1h 52m

Lambert-St Louis

Mon 12/8

3:30 pm-9:41 pm

1 stop5h 11m

$93

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Sat 12/13

2:54 pm-4:34 pm

Nonstop1h 40m

Lambert-St Louis

Wed 12/17

5:30 pm-7:40 pm

Nonstop2h 10m

$149

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Tue 12/2

9:45 am-4:16 pm

1 stop7h 31m

Lambert-St Louis

Sat 12/6

8:41 am-11:54 am

Nonstop2h 13m

$245

NewarkSt. Louis

EWR - STL

EWRSTL

Newark

Tue 12/16

9:00 am-10:50 am

Nonstop2h 50m

Lambert-St Louis

Tue 12/23

6:35 pm-12:26 am

1 stop4h 51m

$251

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Tue 12/2

6:00 am-9:50 am

1 stop4h 50m

Lambert-St Louis

Tue 12/9

11:40 am-5:00 pm

1 stop4h 20m

$255

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Tue 12/2

1:42 pm-6:33 pm

1 stop5h 51m

Lambert-St Louis

Tue 12/9

6:05 pm-11:08 pm

1 stop4h 03m

$255

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 12/25

8:15 am-9:35 am

Nonstop2h 20m

Lambert-St Louis

Thu 12/25

1:10 pm-4:10 pm

Nonstop2h 00m

$263

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 1/22

8:00 am-9:35 am

Nonstop2h 35m

Lambert-St Louis

Sat 1/24

3:50 pm-6:50 pm

Nonstop2h 00m

$265

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 1/22

8:40 am-10:13 am

Nonstop2h 33m

Lambert-St Louis

Sat 1/24

8:30 am-11:40 am

Nonstop2h 10m

$265

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 39m

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 39m
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
8,144 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $133Free CancellationRating
7.2
11,044 reviews
Search American Airlines flights
United AirlinesPriceFrom $166Free CancellationRating
7.4
9,013 reviews
Search United Airlines flights
DeltaPriceFrom $168Free CancellationRating
7.9
8,006 reviews
Search Delta flights
SouthwestPriceFrom $186Free CancellationRating
8.0
4,244 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $257Free CancellationRating
8.0
11,310 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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