What is the cheapest airline that flies from Buffalo to Lambert-St Louis?

American Airlines, Frontier, and Southwest are the most popular carriers operating from Buffalo to Lambert-St Louis

What airlines fly to St. Louis?

Delta, American Airlines and Southwest are the top three most popular airlines that fly to St. Louis from Buffalo according to our data. Delta is the first choice among our users, with 44% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 4 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Buffalo Airport to Lambert-St Louis Airport were last updated today.

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

There are 4 operators available for flights from Buffalo Airport to Lambert-St Louis Airport as of July 2025.

How old do you have to be to fly from Buffalo Airport 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 from Buffalo Airport to Lambert-St Louis Airport.

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

The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$119 Cheap Flights from Buffalo to St. Louis in 2025

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Find the cheapest flights from Buffalo to St. Louis

Round-trip

One-way

Cheap round-trip flights

9:02 am - 1:20 pmBUF-STL

5h 18m1 stop

5:11 pm - 11:57 pmSTL-BUF

5h 46m1 stop

$237Delta

Find Deal

Thu, Aug 28 - Sun, Aug 31

5:50 am - 9:35 amBUF-STL

4h 45m1 stop

1:35 pm - 10:10 pmSTL-BUF

7h 35m2 stops

$242Southwest

Find Deal

Wed, Sep 3 - Wed, Sep 10

10:55 am - 3:44 pmBUF-STL

5h 49m1 stop

3:20 pm - 9:16 pmSTL-BUF

4h 56m1 stop

$244United Airlines

Find Deal

Thu, Sep 4 - Sun, Sep 7

7:40 am - 2:15 pmBUF-STL

7h 35m2 stops

7:10 am - 3:15 pmSTL-BUF

7h 05m2 stops

$247Southwest

Find Deal

Wed, Sep 3 - Wed, Sep 10

6:20 am - 9:32 amBUF-STL

4h 12m1 stop

6:00 pm - 11:18 pmSTL-BUF

4h 18m1 stop

$251Delta

Find Deal

Fri, Aug 15 - Sun, Aug 17

8:50 am - 11:47 pmBUF-STL

15h 57m1 stop

5:40 pm - 7:47 amSTL-BUF

13h 07m1 stop

$281Frontier

Find Deal

Fri, Aug 1 - Sun, Aug 3

4:10 pm - 11:25 pmBUF-STL

8h 15m1 stop

7:40 am - 4:15 pmSTL-BUF

7h 35m2 stops

$293Southwest

Find Deal

Thu, Aug 28 - Sun, Aug 31

4:40 pm - 1:59 pmBUF-STL

22h 19m2 stops

5:40 pm - 7:47 amSTL-BUF

13h 07m1 stop

$311Frontier

Find Deal

Fri, Aug 15 - Sun, Aug 17

10:55 am - 2:33 pmBUF-STL

4h 38m1 stop

9:17 am - 11:59 pmSTL-BUF

13h 42m2 stops

$412United Airlines

Find Deal

Thu, Aug 28 - Sun, Aug 31

4:54 pm - 8:19 pmBUF-STL

4h 25m1 stop

12:48 pm - 6:47 pmSTL-BUF

4h 59m1 stop

$467American Airlines

Find Deal

Thu, Jul 24 - Mon, Jul 28

Frontier flights from Buffalo to St. Louis

Our best Frontier deals on Buffalo to St. Louis flight tickets

Frontier

Aug 1

BUF8:50 amBuffalo

15h 57m

1 stop

STL11:47 pmLambert-St Louis

Aug 3

STL5:40 pmLambert-St Louis

13h 07m

1 stop

BUF7:47 amBuffalo

$281

Find similar

Frontier

Jul 21

BUF8:50 amBuffalo

15h 57m

1 stop

STL11:47 pmLambert-St Louis

Jul 24

STL5:40 pmLambert-St Louis

13h 07m

1 stop

BUF7:47 amBuffalo

$309

Find similar

Frontier

Aug 15

BUF4:40 pmBuffalo

22h 19m

2 stops

STL1:59 pmLambert-St Louis

Aug 17

STL5:40 pmLambert-St Louis

13h 07m

1 stop

BUF7:47 amBuffalo

$311

Find similar

Delta flights from Buffalo to St. Louis

Our best Delta deals on Buffalo to St. Louis flight tickets

Delta

Aug 28

BUF9:02 amBuffalo

5h 18m

1 stop

STL1:20 pmLambert-St Louis

Aug 31

STL5:11 pmLambert-St Louis

5h 46m

1 stop

BUF11:57 pmBuffalo

$237

Find similar

Delta

Aug 15

BUF6:20 amBuffalo

4h 12m

1 stop

STL9:32 amLambert-St Louis

Aug 17

STL6:00 pmLambert-St Louis

4h 18m

1 stop

BUF11:18 pmBuffalo

$251

Find similar

Delta

Aug 4

BUF6:04 amBuffalo

6h 30m

1 stop

STL11:34 amLambert-St Louis

Aug 6

STL11:18 amLambert-St Louis

6h 01m

1 stop

BUF6:19 pmBuffalo

$298

Find similar

How to get the cheapest flight ticket from Buffalo 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

Prices

Airlines

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

In general, September is the cheapest month to fly from Buffalo to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $296. The month of July is another great option to travel to St. Louis, with average flight prices from Buffalo averaging around $306.

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 $326. 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 Monday because tickets tend to average around $486. 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 Buffalo at noon is the least expensive time of day to depart. momondo users have found prices as low as $328 when looking at flights departing at noon. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $416 per ticket.

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

You are more likely to see cheaper flights to St. Louis from Buffalo when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $354 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Buffalo for as low as $262 on momondo.

How have Buffalo to St. Louis flight prices changed over time?

As of July 2025, prices for Buffalo to St. Louis flights are approximately 15% cheaper when compared to flights at the same time last year.

When to book flights from Buffalo to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Buffalo to St. Louis according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Buffalo to St. Louis (BUF to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Buffalo to St. Louis

Best Price Found	$119
Fastest flight time	4h 12m
Direct flights	None
Airports in St. Louis	1 airport

The best one-way flight to St. Louis from Buffalo in the past 72 hours is $119. The best round-trip flight deal from Buffalo to St. Louis found on momondo in the last 72 hours is $237.

The fastest flight from Buffalo to St. Louis takes 4h 12m

There are no direct flights from Buffalo to St. Louis. Popular non-direct route for this connection is Buffalo Airport - Lambert-St Louis Airport.

There is 1 airport near St. Louis: Lambert-St Louis (STL)

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How far is Buffalo to Lambert-St Louis by plane?
A flight from Buffalo to Lambert-St Louis will travel around 660.3 mi. Flights usually cover this in 4h 12m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Buffalo Airport to Lambert-St Louis Airport?
Prices for flights from Buffalo Airport to Lambert-St Louis Airport were last updated today.
How many operators does momondo search for flights from Buffalo Airport to Lambert-St Louis Airport?
There are 4 operators available for flights from Buffalo Airport to Lambert-St Louis Airport as of July 2025.
How old do you have to be to fly from Buffalo Airport 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 from Buffalo Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Buffalo to St. Louis?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Buffalo to St. Louis is Delta (42% of total bookings). The next most popular airlines are American Airlines (36%), Southwest (15%), and United Airlines (6%).

Best airlines flying from Buffalo to St. Louis

Compare and see reviews for airlines that fly from Buffalo to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $250	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Delta	PriceFrom $277	Free Cancellation	Rating 8.0 7,956 reviews	Search Delta flights
United Airlines	PriceFrom $286	Free Cancellation	Rating 7.4 8,858 reviews	Search United Airlines flights
Southwest	PriceFrom $301	Free Cancellation	Rating 8.0 4,244 reviews	Search Southwest flights

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Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Buffalo to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Buffalo to St. Louis with flexible booking policies on momondo?

All flight searches from Buffalo to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Buffalo to 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 from Buffalo to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Buffalo and alert you when they change.