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Cheap flights from North America to St. Louis from $28

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 2/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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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
6:00 am - 6:51 am
ATL
-
STL
1h 51mnonstop
Frontier Logo
8:17 pm - 10:57 pm
STL
-
ATL
1h 40mnonstop
$58Frontier
Wed, Feb 11 - Wed, Feb 18
Frontier Logo
6:00 am - 6:51 am
ATL
-
STL
1h 51mnonstop
Frontier Logo
8:17 pm - 10:57 pm
STL
-
ATL
1h 40mnonstop
$62Frontier
Mon, Feb 16 - Wed, Feb 18
Frontier Logo
6:00 am - 6:51 am
ATL
-
STL
1h 51mnonstop
Frontier Logo
8:22 pm - 11:02 pm
STL
-
ATL
1h 40mnonstop
$63Frontier
Wed, Feb 11 - Mon, Feb 16
American Airlines Logo
12:59 am - 11:01 am
SEA
-
STL
8h 02m
1 stop
American Airlines Logo
6:37 pm - 12:24 am
STL
-
SEA
7h 47m
1 stop
$159American Airlines
Mon, Mar 2 - Tue, Mar 10
American Airlines Logo
11:55 pm - 11:37 am
SEA
-
STL
9h 42m
1 stop
American Airlines Logo
8:03 pm - 12:51 am
STL
-
SEA
6h 48m
1 stop
$167American Airlines
Mon, Apr 20 - Sat, Apr 25
Delta Logo
3:30 pm - 11:25 pm
SEA
-
STL
5h 55m
1 stop
Delta Logo
2:12 pm - 6:30 pm
STL
-
SEA
6h 18m
1 stop
$177Delta
Thu, Mar 26 - Mon, Mar 30
United Airlines Logo
8:40 am - 10:13 am
IAD
-
STL
2h 33mnonstop
United Airlines Logo
12:15 pm - 3:27 pm
STL
-
IAD
2h 12mnonstop
$262United Airlines
Thu, Feb 19 - Sat, Feb 21
Delta Logo
6:00 am - 11:02 am
IAD
-
STL
6h 02m
1 stop
Delta Logo
6:59 pm - 12:27 am
STL
-
IAD
4h 28m
1 stop
$265Delta
Wed, Mar 4 - Wed, Mar 18
Southwest Logo
6:50 am - 8:45 am
LGA
-
STL
2h 55mnonstop
Southwest Logo
6:30 am - 9:50 am
STL
-
LGA
2h 20mnonstop
$271Southwest
Sat, Mar 7 - Sun, Mar 8
Southwest Logo
6:30 pm - 8:30 pm
LGA
-
STL
3h 00mnonstop
Southwest Logo
8:25 am - 11:25 pm
STL
-
LGA
14h 00m
1 stop
$272Southwest
Thu, Mar 5 - Sat, Mar 7

Frontier flights from North America to St. Louis

Our best Frontier deals on North America to St. Louis flight tickets
Frontier
Feb 11
ATL6:00 amAtlanta Hartsfield-Jackson
1h 51m
STL6:51 amLambert-St Louis
Feb 18
STL8:17 pmLambert-St Louis
1h 40m
ATL10:57 pmAtlanta Hartsfield-Jackson
$58
Frontier
Feb 16
ATL6:00 amAtlanta Hartsfield-Jackson
1h 51m
STL6:51 amLambert-St Louis
Feb 18
STL8:17 pmLambert-St Louis
1h 40m
ATL10:57 pmAtlanta Hartsfield-Jackson
$62
Frontier
Feb 11
ATL6:00 amAtlanta Hartsfield-Jackson
1h 51m
STL6:51 amLambert-St Louis
Feb 16
STL8:22 pmLambert-St Louis
1h 40m
ATL11:02 pmAtlanta Hartsfield-Jackson
$63

Southwest flights from North America to St. Louis

Our best Southwest deals on North America to St. Louis flight tickets
Southwest
May 13
SEA11:45 pmSeattle/Tacoma Intl
8h 30m
1 stop
STL10:15 amLambert-St Louis
May 19
STL1:45 pmLambert-St Louis
12h 25m
1 stop
SEA12:10 amSeattle/Tacoma Intl
$232
Southwest
Feb 19
SEA6:35 amSeattle/Tacoma Intl
7h 20m
1 stop
STL3:55 pmLambert-St Louis
Feb 28
STL6:10 amLambert-St Louis
9h 40m
1 stop
SEA1:50 pmSeattle/Tacoma Intl
$233
Southwest
May 12
SEA6:50 amSeattle/Tacoma Intl
9h 15m
2 stops
STL6:05 pmLambert-St Louis
May 19
STL1:45 pmLambert-St Louis
12h 25m
1 stop
SEA12:10 amSeattle/Tacoma Intl
$259

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 February 2, 2026.
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

Wed 2/11

6:00 am-6:51 am

Nonstop1h 51m

Lambert-St Louis

Wed 2/18

8:17 pm-10:57 pm

Nonstop1h 40m

$58

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Mon 2/16

6:00 am-6:51 am

Nonstop1h 51m

Lambert-St Louis

Wed 2/18

8:17 pm-10:57 pm

Nonstop1h 40m

$62

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Wed 2/11

6:00 am-6:51 am

Nonstop1h 51m

Lambert-St Louis

Mon 2/16

8:22 pm-11:02 pm

Nonstop1h 40m

$63

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Mon 3/2

12:59 am-11:01 am

1 stop8h 02m

Lambert-St Louis

Tue 3/10

6:37 pm-12:24 am

1 stop7h 47m

$159

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Mon 4/20

11:55 pm-11:37 am

1 stop9h 42m

Lambert-St Louis

Sat 4/25

8:03 pm-12:51 am

1 stop6h 48m

$167

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Thu 3/26

3:30 pm-11:25 pm

1 stop5h 55m

Lambert-St Louis

Mon 3/30

2:12 pm-6:30 pm

1 stop6h 18m

$177

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 2/19

8:40 am-10:13 am

Nonstop2h 33m

Lambert-St Louis

Sat 2/21

12:15 pm-3:27 pm

Nonstop2h 12m

$262

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Wed 3/4

6:00 am-11:02 am

1 stop6h 02m

Lambert-St Louis

Wed 3/18

6:59 pm-12:27 am

1 stop4h 28m

$265

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Sat 3/7

6:50 am-8:45 am

Nonstop2h 55m

Lambert-St Louis

Sun 3/8

6:30 am-9:50 am

Nonstop2h 20m

$271

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Thu 3/5

6:30 pm-8:30 pm

Nonstop3h 00m

Lambert-St Louis

Sat 3/7

8:25 am-11:25 pm

1 stop14h 00m

$272

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 $304. The month of August is another great option to travel to St. Louis, with average flight prices from North America averaging around $307.

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 $314. 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 $441. 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 $343 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 $370 per ticket.

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

Fly from Orlando 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

$100

Fastest flight time

1h 05m

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 $100. 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 05m
Direct flights go from North America to St. Louis every day.
There is 1 airport in St. Louis. From North America there are direct flights to 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 $53Free CancellationRating
5.7
3,050 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $54Free CancellationRating
6.3
8,395 reviews
Search Spirit Airlines flights
DeltaPriceFrom $126Free CancellationRating
7.9
8,129 reviews
Search Delta flights
American AirlinesPriceFrom $144Free CancellationRating
7.2
11,212 reviews
Search American Airlines flights
United AirlinesPriceFrom $155Free CancellationRating
7.4
9,229 reviews
Search United Airlines flights
SouthwestPriceFrom $177Free CancellationRating
8.0
4,272 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $257Free CancellationRating
8.0
11,829 reviews
Search Alaska Airlines flights
JetBluePriceFrom $385Free CancellationRating
7.2
2,892 reviews
Search JetBlue 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
Maryland Heights
Florissant
O'Fallon
Collinsville
Fenton
St. Peters
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Glencoe
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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