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Cheap flights from North America to St. Louis from $43

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.
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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
11:38 am - 2:46 pm
DEN
-
STL
2h 08mnonstop
Frontier Logo
3:46 pm - 5:23 pm
STL
-
DEN
2h 37mnonstop
$82Frontier
Wed, Feb 4 - Sat, Feb 7
Frontier Logo
11:38 am - 2:46 pm
DEN
-
STL
2h 08mnonstop
Frontier Logo
3:28 pm - 5:05 pm
STL
-
DEN
2h 37mnonstop
$83Frontier
Wed, Feb 4 - Wed, Feb 11
Delta Logo
6:00 am - 9:32 am
IAD
-
STL
4h 32m
1 stop
Delta Logo
5:01 pm - 12:21 am
STL
-
IAD
6h 20m
1 stop
$253Delta
Sat, Feb 14 - Sat, Feb 21
American Airlines Logo
5:00 pm - 9:37 pm
JFK
-
STL
5h 37m
1 stop
American Airlines Logo
9:36 am - 2:59 pm
STL
-
JFK
4h 23m
1 stop
$261American Airlines
Wed, Feb 18 - Wed, Feb 25
Delta Logo
10:25 am - 12:24 pm
LGA
-
STL
2h 59mnonstop
Delta Logo
7:20 am - 10:50 am
STL
-
LGA
2h 30mnonstop
$261Delta
Tue, Apr 14 - Sat, Apr 18
United Airlines Logo
8:40 am - 10:13 am
IAD
-
STL
2h 33mnonstop
United Airlines Logo
8:30 am - 11:40 am
STL
-
IAD
2h 10mnonstop
$262United Airlines
Thu, Feb 12 - Sat, Feb 14
American Airlines Logo
6:59 am - 1:03 pm
LGA
-
STL
7h 04m
1 stop
American Airlines Logo
3:30 pm - 6:59 pm
STL
-
LGA
2h 29mnonstop
$264American Airlines
Thu, Feb 5 - Thu, Feb 5
Southwest Logo
5:40 am - 7:35 am
HOU
-
STL
1h 55mnonstop
Southwest Logo
12:55 pm - 3:10 pm
STL
-
HOU
2h 15mnonstop
$277Southwest
Wed, Feb 18 - Wed, Feb 25
Southwest Logo
12:55 pm - 5:10 pm
HOU
-
STL
4h 15m
1 stop
Southwest Logo
6:00 am - 8:20 am
STL
-
HOU
2h 20mnonstop
$283Southwest
Wed, Feb 18 - Wed, Feb 25
United Airlines Logo
6:00 am - 12:27 pm
BOS
-
STL
7h 27m
1 stop
United Airlines Logo
10:00 am - 5:26 pm
STL
-
BOS
6h 26m
1 stop
$325United Airlines
Wed, Mar 25 - Tue, Mar 31

Frontier flights from North America to St. Louis

Our best Frontier deals on North America to St. Louis flight tickets
Frontier
Feb 4
DEN11:38 amDenver Intl
2h 08m
STL2:46 pmLambert-St Louis
Feb 7
STL3:46 pmLambert-St Louis
2h 37m
DEN5:23 pmDenver Intl
$82
Frontier
Feb 4
DEN11:38 amDenver Intl
2h 08m
STL2:46 pmLambert-St Louis
Feb 9
STL1:40 pmLambert-St Louis
2h 36m
DEN3:16 pmDenver Intl
$83
Frontier
Feb 27
DEN10:01 amDenver Intl
2h 08m
STL1:09 pmLambert-St Louis
Mar 2
STL1:54 pmLambert-St Louis
2h 36m
DEN3:30 pmDenver Intl
$88

American Airlines flights from North America to St. Louis

Our best American Airlines deals on North America to St. Louis flight tickets
American Airlines
Feb 18
JFK5:00 pmNew York John F Kennedy Intl
5h 37m
1 stop
STL9:37 pmLambert-St Louis
Feb 25
STL9:36 amLambert-St Louis
4h 23m
1 stop
JFK2:59 pmNew York John F Kennedy Intl
$261
American Airlines
Feb 5
LGA6:00 amNew York LaGuardia
5h 20m
1 stop
STL10:20 amLambert-St Louis
Feb 5
STL11:27 amLambert-St Louis
2h 28m
LGA2:55 pmNew York LaGuardia
$264
American Airlines
Feb 5
LGA6:59 amNew York LaGuardia
7h 04m
1 stop
STL1:03 pmLambert-St Louis
Feb 5
STL3:30 pmLambert-St Louis
2h 29m
LGA6:59 pmNew York LaGuardia
$265

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 January 21, 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

DenverSt. Louis

DEN - STL

DENSTL

Denver Intl

Wed 2/4

11:38 am-2:46 pm

Nonstop2h 08m

Lambert-St Louis

Sat 2/7

3:46 pm-5:23 pm

Nonstop2h 37m

$82

DenverSt. Louis

DEN - STL

DENSTL

Denver Intl

Wed 2/4

11:38 am-2:46 pm

Nonstop2h 08m

Lambert-St Louis

Wed 2/11

3:28 pm-5:05 pm

Nonstop2h 37m

$83

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 2/14

6:00 am-9:32 am

1 stop4h 32m

Lambert-St Louis

Sat 2/21

5:01 pm-12:21 am

1 stop6h 20m

$253

New YorkSt. Louis

JFK - STL

JFKSTL

New York John F Kennedy Intl

Wed 2/18

5:00 pm-9:37 pm

1 stop5h 37m

Lambert-St Louis

Wed 2/25

9:36 am-2:59 pm

1 stop4h 23m

$261

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Tue 4/14

10:25 am-12:24 pm

Nonstop2h 59m

Lambert-St Louis

Sat 4/18

7:20 am-10:50 am

Nonstop2h 30m

$261

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 2/12

8:40 am-10:13 am

Nonstop2h 33m

Lambert-St Louis

Sat 2/14

8:30 am-11:40 am

Nonstop2h 10m

$262

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Thu 2/5

6:59 am-1:03 pm

1 stop7h 04m

Lambert-St Louis

Thu 2/5

3:30 pm-6:59 pm

Nonstop2h 29m

$264

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Wed 2/18

5:40 am-7:35 am

Nonstop1h 55m

Lambert-St Louis

Wed 2/25

12:55 pm-3:10 pm

Nonstop2h 15m

$277

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Wed 2/18

12:55 pm-5:10 pm

1 stop4h 15m

Lambert-St Louis

Wed 2/25

6:00 am-8:20 am

Nonstop2h 20m

$283

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Wed 3/25

6:00 am-12:27 pm

1 stop7h 27m

Lambert-St Louis

Tue 3/31

10:00 am-5:26 pm

1 stop6h 26m

$325

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 $298. The month of April 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 $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 $440. 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 $368 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

$99

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 $99. 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 $49Free CancellationRating
5.7
3,057 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $54Free CancellationRating
6.3
8,364 reviews
Search Spirit Airlines flights
DeltaPriceFrom $126Free CancellationRating
7.9
8,088 reviews
Search Delta flights
American AirlinesPriceFrom $133Free CancellationRating
7.2
11,174 reviews
Search American Airlines flights
United AirlinesPriceFrom $154Free CancellationRating
7.4
9,191 reviews
Search United Airlines flights
SouthwestPriceFrom $177Free CancellationRating
8.0
4,266 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $257Free CancellationRating
8.0
11,775 reviews
Search Alaska Airlines flights
JetBluePriceFrom $385Free CancellationRating
7.2
2,890 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
Fenton
Collinsville
St. Peters
Wentzville
Alton
Farmington
Clayton
Eureka
Edwardsville
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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