Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Buffalo to St. Louis from $129

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 3/25. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Buffalo to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
1:56 pm - 6:50 am
BUF
-
STL
17h 54m
1 stop
Frontier Logo
4:59 pm - 12:42 pm
STL
-
BUF
18h 43m
2 stops
$228Frontier
Tue, Apr 14 - Tue, Apr 21
United Airlines Logo
5:57 pm - 9:08 pm
BUF
-
STL
4h 11m
1 stop
United Airlines Logo
9:10 am - 5:16 pm
STL
-
BUF
7h 06m
1 stop
$237United Airlines
Tue, Apr 14 - Wed, Apr 15
Frontier Logo
8:16 pm - 11:19 pm
BUF
-
STL
28h 03m
1 stop
Frontier Logo
4:59 pm - 10:49 am
STL
-
BUF
16h 50m
1 stop
$246Frontier
Mon, Apr 13 - Fri, Apr 17
American Airlines Logo
12:22 pm - 5:12 pm
BUF
-
STL
5h 50m
1 stop
American Airlines Logo
5:51 am - 10:51 am
STL
-
BUF
4h 00m
1 stop
$250American Airlines
Tue, Apr 7 - Thu, Apr 9
Southwest Logo
4:00 pm - 10:10 pm
BUF
-
STL
7h 10m
2 stops
Southwest Logo
5:35 am - 10:20 am
STL
-
BUF
3h 45m
1 stop
$252Southwest
Tue, Apr 14 - Wed, Apr 15
Frontier Logo
12:42 pm - 11:25 pm
BUF
-
STL
11h 43m
2 stops
Frontier Logo
8:23 pm - 11:40 am
STL
-
BUF
14h 17m
1 stop
$255Frontier
Mon, Apr 13 - Wed, Apr 15
Southwest Logo
6:55 pm - 10:10 pm
BUF
-
STL
4h 15m
1 stop
Southwest Logo
10:25 am - 3:20 pm
STL
-
BUF
3h 55m
1 stop
$257Southwest
Tue, Apr 14 - Tue, Apr 21
Southwest Logo
9:45 am - 6:00 pm
BUF
-
STL
9h 15m
2 stops
Southwest Logo
7:35 am - 2:35 pm
STL
-
BUF
6h 00m
2 stops
$267Southwest
Tue, Apr 14 - Tue, Apr 21
Frontier Logo
8:59 pm - 7:51 am
BUF
-
STL
11h 52m
1 stop
Frontier Logo
4:59 pm - 12:52 pm
STL
-
BUF
18h 53m
2 stops
$276Frontier
Thu, Apr 9 - Tue, Apr 14
United Airlines Logo
5:29 pm - 9:07 pm
BUF
-
STL
4h 38m
1 stop
United Airlines Logo
6:25 am - 1:17 pm
STL
-
BUF
5h 52m
1 stop
$277United Airlines
Wed, Mar 25 - Sat, Mar 28

Frontier flights from Buffalo to St. Louis

Our best Frontier deals on Buffalo to St. Louis flight tickets
Frontier
Apr 14
BUF1:56 pmBuffalo
17h 54m
1 stop
STL6:50 amLambert-St Louis
Apr 21
STL4:59 pmLambert-St Louis
18h 43m
2 stops
BUF12:42 pmBuffalo
$228
Frontier
Apr 13
BUF8:16 pmBuffalo
28h 03m
1 stop
STL11:19 pmLambert-St Louis
Apr 17
STL4:59 pmLambert-St Louis
16h 50m
1 stop
BUF10:49 amBuffalo
$246
Frontier
Apr 13
BUF12:42 pmBuffalo
11h 43m
2 stops
STL11:25 pmLambert-St Louis
Apr 15
STL8:23 pmLambert-St Louis
14h 17m
1 stop
BUF11:40 amBuffalo
$255

Delta flights from Buffalo to St. Louis

Our best Delta deals on Buffalo to St. Louis flight tickets
Delta
Apr 8
BUF6:02 amBuffalo
7h 20m
1 stop
STL12:22 pmLambert-St Louis
Apr 13
STL5:59 pmLambert-St Louis
3h 40m
1 stop
BUF10:39 pmBuffalo
$279
Delta
Mar 14
BUF6:08 pmBuffalo
6h 50m
1 stop
STL11:58 pmLambert-St Louis
Mar 20
STL6:10 amLambert-St Louis
7h 09m
1 stop
BUF2:19 pmBuffalo
$367
Delta
Mar 16
BUF7:38 pmBuffalo
5h 20m
1 stop
STL11:58 pmLambert-St Louis
Mar 20
STL6:10 amLambert-St Louis
7h 09m
1 stop
BUF2:19 pmBuffalo
$377

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 1, 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

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/14

1:56 pm-6:50 am

1 stop17h 54m

Lambert-St Louis

Tue 4/21

4:59 pm-12:42 pm

2 stops18h 43m

$228

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/14

5:57 pm-9:08 pm

1 stop4h 11m

Lambert-St Louis

Wed 4/15

9:10 am-5:16 pm

1 stop7h 06m

$237

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 4/13

8:16 pm-11:19 pm

1 stop28h 03m

Lambert-St Louis

Fri 4/17

4:59 pm-10:49 am

1 stop16h 50m

$246

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/7

12:22 pm-5:12 pm

1 stop5h 50m

Lambert-St Louis

Thu 4/9

5:51 am-10:51 am

1 stop4h 00m

$250

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/14

4:00 pm-10:10 pm

2 stops7h 10m

Lambert-St Louis

Wed 4/15

5:35 am-10:20 am

1 stop3h 45m

$252

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 4/13

12:42 pm-11:25 pm

2 stops11h 43m

Lambert-St Louis

Wed 4/15

8:23 pm-11:40 am

1 stop14h 17m

$255

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/14

6:55 pm-10:10 pm

1 stop4h 15m

Lambert-St Louis

Tue 4/21

10:25 am-3:20 pm

1 stop3h 55m

$257

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/14

9:45 am-6:00 pm

2 stops9h 15m

Lambert-St Louis

Tue 4/21

7:35 am-2:35 pm

2 stops6h 00m

$267

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 4/9

8:59 pm-7:51 am

1 stop11h 52m

Lambert-St Louis

Tue 4/14

4:59 pm-12:52 pm

2 stops18h 53m

$276

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 3/25

5:29 pm-9:07 pm

1 stop4h 38m

Lambert-St Louis

Sat 3/28

6:25 am-1:17 pm

1 stop5h 52m

$277

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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 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

4h 04m

Direct flights

None
The fastest flight from Buffalo to St. Louis takes 4h 04m
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 4h 04m, 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
8,244 reviews
Search Delta flights
American AirlinesPriceFrom $236Free CancellationRating
7.1
11,370 reviews
Search American Airlines flights
SouthwestPriceFrom $317Free CancellationRating
8.0
4,303 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
St. Peters
Wentzville
Collinsville
Alton
Fenton
Farmington
Edwardsville
Festus
Clayton
Eureka
Litchfield
Glencoe
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.

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 3/31
Tue 4/7
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States