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Cheap flights from Buffalo to St. Louis from $115

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Buffalo to St. Louis departing on 5/24. 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 Buffalo to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
3:00 pm - 11:25 pm
BUF
-
STL
9h 25m
1 stop
Frontier Logo
4:59 pm - 7:26 pm
STL
-
BUF
25h 27m
1 stop
$183Frontier
Mon, Apr 13 - Wed, Apr 22
Frontier Logo
3:00 pm - 11:25 pm
BUF
-
STL
9h 25m
1 stop
Frontier Logo
4:59 pm - 7:26 pm
STL
-
BUF
25h 27m
1 stop
$212Frontier
Mon, Apr 13 - Wed, Apr 22
Southwest Logo
9:45 am - 3:15 pm
BUF
-
STL
6h 30m
1 stop
Southwest Logo
10:25 am - 3:20 pm
STL
-
BUF
3h 55m
1 stop
$221Southwest
Tue, Apr 14 - Tue, Apr 21
Southwest Logo
3:10 pm - 10:00 pm
BUF
-
STL
7h 50m
2 stops
Southwest Logo
10:25 am - 3:20 pm
STL
-
BUF
3h 55m
1 stop
$226Southwest
Tue, Apr 14 - Tue, Apr 21
Frontier Logo
8:16 pm - 11:19 pm
BUF
-
STL
28h 03m
1 stop
Frontier Logo
4:59 pm - 7:13 pm
STL
-
BUF
25h 14m
1 stop
$236Frontier
Mon, Apr 13 - Wed, Apr 15
Frontier Logo
1:56 pm - 6:50 am
BUF
-
STL
17h 54m
1 stop
Frontier Logo
8:23 pm - 11:09 am
STL
-
BUF
13h 46m
1 stop
$242Frontier
Tue, Apr 14 - Sat, Apr 18
Southwest Logo
6:55 pm - 10:10 pm
BUF
-
STL
4h 15m
1 stop
Southwest Logo
5:35 am - 10:20 am
STL
-
BUF
3h 45m
1 stop
$243Southwest
Tue, Apr 21 - Tue, Apr 28
Southwest Logo
1:10 pm - 8:00 pm
BUF
-
STL
7h 50m
2 stops
Southwest Logo
5:35 am - 10:20 am
STL
-
BUF
3h 45m
1 stop
$249Southwest
Tue, Apr 21 - Tue, Apr 28
Frontier Logo
10:52 am - 11:19 pm
BUF
-
STL
13h 27m
1 stop
Frontier Logo
4:59 pm - 7:26 pm
STL
-
BUF
25h 27m
1 stop
$257Frontier
Fri, Apr 17 - Sun, Apr 19
Southwest Logo
4:00 pm - 9:05 pm
BUF
-
STL
6h 05m
1 stop
Southwest Logo
10:25 am - 3:20 pm
STL
-
BUF
3h 55m
1 stop
$261Southwest
Tue, Apr 14 - Tue, Apr 21

Frontier flights from Buffalo to St. Louis

Our best Frontier deals on Buffalo to St. Louis flight tickets
Frontier
Apr 13
BUF3:00 pmBuffalo
9h 25m
1 stop
STL11:25 pmLambert-St Louis
Apr 22
STL4:59 pmLambert-St Louis
25h 27m
1 stop
BUF7:26 pmBuffalo
$183
Frontier
Apr 13
BUF3:00 pmBuffalo
9h 25m
1 stop
STL11:25 pmLambert-St Louis
Apr 22
STL4:59 pmLambert-St Louis
25h 27m
1 stop
BUF7:26 pmBuffalo
$212
Frontier
Apr 13
BUF8:16 pmBuffalo
28h 03m
1 stop
STL11:19 pmLambert-St Louis
Apr 15
STL4:59 pmLambert-St Louis
25h 14m
1 stop
BUF7:13 pmBuffalo
$236

Southwest flights from Buffalo to St. Louis

Our best Southwest deals on Buffalo to St. Louis flight tickets
Southwest
Apr 14
BUF9:45 amBuffalo
6h 30m
1 stop
STL3:15 pmLambert-St Louis
Apr 21
STL10:25 amLambert-St Louis
3h 55m
1 stop
BUF3:20 pmBuffalo
$221
Southwest
Apr 14
BUF3:10 pmBuffalo
7h 50m
2 stops
STL10:00 pmLambert-St Louis
Apr 21
STL10:25 amLambert-St Louis
3h 55m
1 stop
BUF3:20 pmBuffalo
$226
Southwest
Apr 21
BUF6:55 pmBuffalo
4h 15m
1 stop
STL10:10 pmLambert-St Louis
Apr 28
STL5:35 amLambert-St Louis
3h 45m
1 stop
BUF10:20 amBuffalo
$243

momondo Fare Finder

 
Customize your flight search to find flights from Buffalo 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 March 28, 2026.
Use the filters below to find and compare flights from Buffalo to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 4/13

3:00 pm-11:25 pm

1 stop9h 25m

Lambert-St Louis

Wed 4/22

4:59 pm-7:26 pm

1 stop25h 27m

$183

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 4/13

3:00 pm-11:25 pm

1 stop9h 25m

Lambert-St Louis

Wed 4/22

4:59 pm-7:26 pm

1 stop25h 27m

$212

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/14

9:45 am-3:15 pm

1 stop6h 30m

Lambert-St Louis

Tue 4/21

10:25 am-3:20 pm

1 stop3h 55m

$221

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/14

3:10 pm-10:00 pm

2 stops7h 50m

Lambert-St Louis

Tue 4/21

10:25 am-3:20 pm

1 stop3h 55m

$226

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 4/13

8:16 pm-11:19 pm

1 stop28h 03m

Lambert-St Louis

Wed 4/15

4:59 pm-7:13 pm

1 stop25h 14m

$236

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/14

1:56 pm-6:50 am

1 stop17h 54m

Lambert-St Louis

Sat 4/18

8:23 pm-11:09 am

1 stop13h 46m

$242
Quickest round-trip

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/21

6:55 pm-10:10 pm

1 stop4h 15m

Lambert-St Louis

Tue 4/28

5:35 am-10:20 am

1 stop3h 45m

$243

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/21

1:10 pm-8:00 pm

2 stops7h 50m

Lambert-St Louis

Tue 4/28

5:35 am-10:20 am

1 stop3h 45m

$249

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 4/17

10:52 am-11:19 pm

1 stop13h 27m

Lambert-St Louis

Sun 4/19

4:59 pm-7:26 pm

1 stop25h 27m

$257

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/14

4:00 pm-9:05 pm

1 stop6h 05m

Lambert-St Louis

Tue 4/21

10:25 am-3:20 pm

1 stop3h 55m

$261

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 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

What is the typical price of a round-trip flight between Buffalo and St. Louis?

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 $316. The month of December is another great option to travel to St. Louis, with average flight prices from Buffalo averaging around $319.

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

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

Fastest flight time

5h 29m

Direct flights

None
The fastest flight from Buffalo to St. Louis takes 5h 29m
There are no direct flights from Buffalo to St. Louis. There are no popular flight routes from Buffalo to St. Louis.
Search flight deals

  • 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 5h 29m, 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?

  • 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?

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
DeltaPriceFrom $164Free CancellationRating
7.9
8,356 reviews
Search Delta flights
American AirlinesPriceFrom $236Free CancellationRating
7.1
11,520 reviews
Search American Airlines flights
SouthwestPriceFrom $317Free CancellationRating
8.0
4,333 reviews
Search Southwest 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
Collinsville
St. Peters
Wentzville
Alton
Fenton
Farmington
Clayton
Festus
Edwardsville
Eureka
Litchfield
Shrewsbury
Grafton

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.

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