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Cheap flights from Buffalo to St. Louis from $93

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 8/18. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Buffalo to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
2:48 pm - 5:37 pm
BUF
-
STL
27h 49m
1 stop
Frontier Logo
6:34 pm - 1:53 pm
STL
-
BUF
18h 19m
1 stop
$186Frontier
Wed, Jul 29 - Sun, Aug 2
Frontier Logo
2:50 pm - 8:52 am
BUF
-
STL
19h 02m
1 stop
Frontier Logo
5:33 pm - 10:40 am
STL
-
BUF
16h 07m
1 stop
$187Frontier
Fri, Aug 28 - Mon, Aug 31
Frontier Logo
2:48 pm - 5:37 pm
BUF
-
STL
27h 49m
1 stop
Frontier Logo
6:34 pm - 1:53 pm
STL
-
BUF
18h 19m
1 stop
$191Frontier
Wed, Jul 22 - Tue, Aug 11
Frontier Logo
11:29 am - 5:37 pm
BUF
-
STL
7h 08m
1 stop
Frontier Logo
6:34 pm - 1:53 pm
STL
-
BUF
18h 19m
1 stop
$209Frontier
Tue, Jul 21 - Thu, Jul 23
American Airlines Logo
7:34 pm - 11:34 pm
BUF
-
STL
5h 00m
1 stop
American Airlines Logo
5:00 am - 11:39 am
STL
-
BUF
5h 39m
1 stop
$221American Airlines
Wed, Sep 2 - Tue, Sep 15
Southwest Logo
2:35 pm - 7:55 pm
BUF
-
STL
6h 20m
1 stop
Southwest Logo
6:30 am - 2:20 pm
STL
-
BUF
6h 50m
2 stops
$227Southwest
Wed, Sep 2 - Tue, Sep 15
Southwest Logo
3:00 pm - 10:10 pm
BUF
-
STL
8h 10m
2 stops
Southwest Logo
6:30 am - 2:20 pm
STL
-
BUF
6h 50m
2 stops
$232Southwest
Wed, Sep 2 - Tue, Sep 15
American Airlines Logo
7:34 pm - 11:34 pm
BUF
-
STL
5h 00m
1 stop
American Airlines Logo
6:00 am - 12:38 pm
STL
-
BUF
5h 38m
1 stop
$237American Airlines
Sat, Aug 22 - Tue, Aug 25
Southwest Logo
10:10 am - 3:50 pm
BUF
-
STL
6h 40m
2 stops
Southwest Logo
9:20 am - 2:10 pm
STL
-
BUF
3h 50m
1 stop
$252Southwest
Tue, Oct 20 - Sat, Oct 24
Frontier Logo
2:50 pm - 8:52 am
BUF
-
STL
19h 02m
1 stop
Frontier Logo
5:33 pm - 7:07 pm
STL
-
BUF
24h 34m
2 stops
$255Frontier
Fri, Aug 28 - Mon, Aug 31

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Frontier flights from Buffalo to St. Louis

Our best Frontier deals on Buffalo to St. Louis flight tickets
Frontier
Jul 29
BUF2:48 pmBuffalo
27h 49m
1 stop
STL5:37 pmLambert-St Louis
Aug 2
STL6:34 pmLambert-St Louis
18h 19m
1 stop
BUF1:53 pmBuffalo
$186
Frontier
Aug 28
BUF2:50 pmBuffalo
19h 02m
1 stop
STL8:52 amLambert-St Louis
Aug 31
STL5:33 pmLambert-St Louis
16h 07m
1 stop
BUF10:40 amBuffalo
$187
Frontier
Jul 22
BUF2:48 pmBuffalo
27h 49m
1 stop
STL5:37 pmLambert-St Louis
Aug 11
STL6:34 pmLambert-St Louis
18h 19m
1 stop
BUF1:53 pmBuffalo
$191

American Airlines flights from Buffalo to St. Louis

Our best American Airlines deals on Buffalo to St. Louis flight tickets
American Airlines
Oct 20
BUF11:57 amBuffalo
5h 14m
1 stop
STL4:11 pmLambert-St Louis
Oct 24
STL6:28 pmLambert-St Louis
3h 58m
1 stop
BUF11:26 pmBuffalo
$237
American Airlines
Aug 21
BUF7:34 pmBuffalo
5h 00m
1 stop
STL11:34 pmLambert-St Louis
Aug 24
STL6:00 amLambert-St Louis
5h 38m
1 stop
BUF12:38 pmBuffalo
$364
American Airlines
Jul 2
BUF8:27 amBuffalo
6h 25m
1 stop
STL1:52 pmLambert-St Louis
Jul 7
STL6:14 amLambert-St Louis
7h 05m
1 stop
BUF2:19 pmBuffalo
$385

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 June 15, 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

Wed 7/29

2:48 pm-5:37 pm

1 stop27h 49m

Lambert-St Louis

Sun 8/2

6:34 pm-1:53 pm

1 stop18h 19m

$186

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 8/28

2:50 pm-8:52 am

1 stop19h 02m

Lambert-St Louis

Mon 8/31

5:33 pm-10:40 am

1 stop16h 07m

$187

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 7/22

2:48 pm-5:37 pm

1 stop27h 49m

Lambert-St Louis

Tue 8/11

6:34 pm-1:53 pm

1 stop18h 19m

$191

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 7/21

11:29 am-5:37 pm

1 stop7h 08m

Lambert-St Louis

Thu 7/23

6:34 pm-1:53 pm

1 stop18h 19m

$209

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 9/2

7:34 pm-11:34 pm

1 stop5h 00m

Lambert-St Louis

Tue 9/15

5:00 am-11:39 am

1 stop5h 39m

$221

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 9/2

2:35 pm-7:55 pm

1 stop6h 20m

Lambert-St Louis

Tue 9/15

6:30 am-2:20 pm

2 stops6h 50m

$227

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 9/2

3:00 pm-10:10 pm

2 stops8h 10m

Lambert-St Louis

Tue 9/15

6:30 am-2:20 pm

2 stops6h 50m

$232

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 8/22

7:34 pm-11:34 pm

1 stop5h 00m

Lambert-St Louis

Tue 8/25

6:00 am-12:38 pm

1 stop5h 38m

$237
Quickest round-trip

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 10/20

10:10 am-3:50 pm

2 stops6h 40m

Lambert-St Louis

Sat 10/24

9:20 am-2:10 pm

1 stop3h 50m

$252

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 8/28

2:50 pm-8:52 am

1 stop19h 02m

Lambert-St Louis

Mon 8/31

5:33 pm-7:07 pm

2 stops24h 34m

$255

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

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, December 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 $319. The month of January is another great option to travel to St. Louis, with average flight prices from Buffalo averaging around $321.

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

4h 02m

Direct flights

None
The fastest flight from Buffalo to St. Louis takes 4h 02m
There are no direct flights from Buffalo to St. Louis. There are no popular flight routes from Buffalo to St. Louis.
Search flight deals

Frequently asked questions about flying from Buffalo to St. Louis

  • 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 02m, 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
8,397 reviews
Search Delta flights
American AirlinesPriceFrom $236Free CancellationRating
7.1
11,660 reviews
Search American Airlines flights
SouthwestPriceFrom $317Free CancellationRating
7.9
4,235 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
Fairview Heights
Hermann
Maryland Heights
Florissant
O'Fallon
St. Peters
Collinsville
Alton
Wentzville
Clayton
Fenton
Farmington
Festus
Eureka
Litchfield
Edwardsville
Grafton
Shrewsbury

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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