Which airlines fly to St. Louis?

Southwest is the airline most momondo users in United States opt for when booking flights to St. Louis. American Airlines, Delta and United Airlines are also popular choices when flying to St. Louis from United States. Most major airlines flying from United States to St. Louis will offer flights on a regular basis, though your options may vary depending on what airport you fly from.

Southwest Flights to St. Louis

Southwest is a popular choice for users traveling to St. Louis. It operates 41 flights every week to St. Louis, most often flying from Denver Intl. Southwest ticket prices will depend on when and where you need to fly from - deals as low as $173 (from Atlanta Hartsfield-Jackson) have been found by momondo users. In 4,242 reviews, momondo users have rated Southwest at an average score of 8.0/10.

Alaska Airlines Flights to St. Louis

Alaska Airlines flight deals to St. Louis start from $257 - this is the best price found recently on momondo, and was a round-trip journey departing from Los Angeles. Over any normal week, Alaska Airlines flight prices are typically higher, but vary depending on where you fly from - Dallas/Fort Worth is the most popular Alaska Airlines departure point to St. Louis so generally has the most availability. Alaska Airlines is scored a 8.0/10 in 10,000 reviews.

How long does it take to fly to St. Louis?

Flight times from United States to St. Louis vary, but if you’re flying out of Los Angeles and flying into Lambert-St Louis (one of the most popular routes), then the duration is 3h 25m on average. Another popular route from United States to St. Louis is flying from Miami to Lambert-St Louis, which will take roughly 2h 50m. Keep in mind that layovers or delays could extend your travel time.

$21 Cheap Flights to St. Louis in 2025/26

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Find the cheapest flights from the United States to St. Louis

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

7:30 am - 9:22 amDFW-STL

1h 52mnonstop

1:41 pm - 9:25 amSTL-DFW

19h 44m1 stop

$108Frontier

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Thu, Oct 16 - Thu, Oct 23

7:30 am - 9:22 amDFW-STL

1h 52mnonstop

10:17 am - 12:14 pmSTL-DFW

1h 57mnonstop

$111Frontier

Find Deal

Thu, Oct 9 - Sun, Oct 12

6:29 am - 10:49 amBWI-STL

5h 20m1 stop

3:23 pm - 9:22 pmSTL-BWI

4h 59m1 stop

$151United Airlines

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Tue, Oct 21 - Tue, Oct 21

6:13 pm - 11:54 pmBWI-STL

6h 41m1 stop

4:25 pm - 9:54 pmSTL-BWI

4h 29m1 stop

$159American Airlines

Find Deal

Wed, Oct 8 - Sat, Oct 11

7:08 am - 8:57 amDFW-STL

1h 49mnonstop

11:42 am - 1:40 pmSTL-DFW

1h 58mnonstop

$170American Airlines

Find Deal

Sat, Nov 8 - Mon, Nov 10

9:53 am - 4:20 pmDFW-STL

6h 27m1 stop

3:59 pm - 10:18 pmSTL-DFW

6h 19m1 stop

$197Delta

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Sat, Oct 11 - Sat, Oct 18

6:00 am - 9:15 amBWI-STL

4h 15m1 stop

9:10 am - 5:17 pmSTL-BWI

7h 07m1 stop

$197Delta

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Sat, Oct 11 - Wed, Oct 15

5:45 am - 5:00 pmSEA-STL

9h 15m1 stop

5:10 pm - 11:00 pmSTL-SEA

7h 50m1 stop

$202Southwest

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Sat, Oct 11 - Wed, Oct 15

6:15 am - 10:51 amBWI-STL

5h 36m1 stop

10:00 am - 5:14 pmSTL-BWI

6h 14m1 stop

$207United Airlines

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Sat, Nov 22 - Mon, Nov 24

5:45 am - 5:00 pmSEA-STL

9h 15m1 stop

1:45 pm - 10:30 pmSTL-SEA

10h 45m2 stops

$208Southwest

Find Deal

Sat, Oct 11 - Sat, Oct 18

Fly from

Route

Depart

Return

Price

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Thu 10/16

7:30 am-9:22 am

Nonstop1h 52m

Lambert-St Louis

Thu 10/23

1:41 pm-9:25 am

1 stop19h 44m

$108

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Thu 10/9

7:30 am-9:22 am

Nonstop1h 52m

Lambert-St Louis

Sun 10/12

10:17 am-12:14 pm

Nonstop1h 57m

$111

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Tue 10/21

6:29 am-10:49 am

1 stop5h 20m

Lambert-St Louis

Tue 10/21

3:23 pm-9:22 pm

1 stop4h 59m

$151

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Wed 10/8

6:13 pm-11:54 pm

1 stop6h 41m

Lambert-St Louis

Sat 10/11

4:25 pm-9:54 pm

1 stop4h 29m

$159

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Sat 11/8

7:08 am-8:57 am

Nonstop1h 49m

Lambert-St Louis

Mon 11/10

11:42 am-1:40 pm

Nonstop1h 58m

$170

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Sat 10/11

9:53 am-4:20 pm

1 stop6h 27m

Lambert-St Louis

Sat 10/18

3:59 pm-10:18 pm

1 stop6h 19m

$197

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Sat 10/11

6:00 am-9:15 am

1 stop4h 15m

Lambert-St Louis

Wed 10/15

9:10 am-5:17 pm

1 stop7h 07m

$197

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Sat 10/11

5:45 am-5:00 pm

1 stop9h 15m

Lambert-St Louis

Wed 10/15

5:10 pm-11:00 pm

1 stop7h 50m

$202

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Sat 11/22

6:15 am-10:51 am

1 stop5h 36m

Lambert-St Louis

Mon 11/24

10:00 am-5:14 pm

1 stop6h 14m

$207

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Sat 10/11

5:45 am-5:00 pm

1 stop9h 15m

Lambert-St Louis

Sat 10/18

1:45 pm-10:30 pm

2 stops10h 45m

$208

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

St. Louis flights insights and trends

Explore insights for your St. Louis flight to craft the best travel plan

Prices

Other information

What is the cheapest month to fly to St. Louis?

In general, January is the cheapest month to fly from United States 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 United States averaging around $308.

What is the absolute cheapest flight to St. Louis?

Users booking trips to St. Louis from Orlando found flights 45% cheaper than the average price of flights to St. Louis. To find the cheapest price to St. Louis from your area, use momondo’s Airport-to-Airport Pricing Tool.

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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 United States in the morning is the least expensive time of day to depart. momondo users have found prices as low as $346 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 $383 per ticket.

Cheapest flights to Lambert-St Louis

Find the cheapest flights to Lambert-St Louis from your nearest city or airport

Find flights from Los Angeles to St. Louis

CHEAPEST MONTH TO FLY TO ST. LOUIS FROM LOS ANGELES	October	12% cheaper	Flying from Los Angeles to St. Louis costs on average just $355 in October
MOST EXPENSIVE MONTH TO FLY TO ST. LOUIS FROM LOS ANGELES	December	15% more expensive	It costs about $467 for flights to St. Louis from Los Angeles in December
MOST POPULAR MONTH TO FLY TO ST. LOUIS FROM LOS ANGELES	July	314% more users visited	More momondo users searched in flights to St. Louis from Los Angeles in July than any other month

Cheap St. Louis flight deals and tips

Summary info about St. Louis flight prices, duration and airlines

Best One-Way Price	$21
Best Round-Trip Price	$108
Fastest flight time	1h 46m
Popular in	December

The best one-way flight price to St. Louis from United States in the last 72 hours is $21 (Atlanta Hartsfield-Jackson to Lambert-St Louis).

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The best round-trip flight price to St. Louis from United States in the last 72 hours is $108 (Dallas/Fort Worth to Lambert-St Louis).

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The fastest flight to St. Louis from United States takes 1h 46m (Dallas/Fort Worth to Lambert-St Louis).

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December has the highest demand for flights to St. Louis, with a 9% price increase on average.

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Frequently asked questions about flying to St. Louis

How far in advance should I book a flight to St. Louis?

The best time to book a flight to St. Louis from United States is 62 days out, which is when prices tend to be around $337. In the past 72 hours, momondo users found flights from United States to St. Louis for as low as $221.

Is there an alternative airport near St. Louis?

Finding an alternative and possibly cheaper destination airport near St. Louis is possible. If you are planning a flight to St. Louis, consider booking flights to Belleville Airport (22 mi from St. Louis city center), Marion Williamson County Airport (88 mi from St. Louis city center) or Springfield Capital Airport (88 mi from St. Louis city center).

Is there a cheaper alternative to flying into St. Louis?

The cheapest airport near St. Louis is typically Belleville Airport with an average price of $161/person. These prices vary based on where travelers are coming from. It is suggested that travelers looking to save money try momondo’s Airport-to-Airport Pricing Tool.

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

Prices for flights to Lambert-St Louis Airport are refreshed on a daily basis.

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

There are 22 operators available for flights to Lambert-St Louis Airport as of September 2025.

How old do you have to be to fly to Lambert-St Louis Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel to Lambert-St Louis Airport.

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

The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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Why use momondo?

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

It is quick and easy to find flights to St. Louis 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 to St. Louis with flexible booking policies on momondo?

momondo does allow users to show only those flights to St. Louis which offer a flexible booking policy as well as other useful filters and features.

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

Once all potential St. Louis flight options are in front of you momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.