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 5/15. 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
11:36 am - 4:54 pm
BUF
-
STL
6h 18m
1 stop
Frontier Logo
4:19 pm - 6:46 pm
STL
-
BUF
25h 27m
1 stop
$171Frontier
Thu, May 14 - Sat, May 16
Frontier Logo
11:36 am - 5:33 pm
BUF
-
STL
6h 57m
1 stop
Frontier Logo
4:19 pm - 6:59 pm
STL
-
BUF
25h 40m
1 stop
$191Frontier
Thu, Jun 4 - Sun, Jun 7
Frontier Logo
11:36 am - 4:54 pm
BUF
-
STL
6h 18m
1 stop
Frontier Logo
4:19 pm - 6:46 pm
STL
-
BUF
25h 27m
1 stop
$192Frontier
Thu, May 14 - Sat, May 16
Frontier Logo
11:36 am - 5:33 pm
BUF
-
STL
6h 57m
1 stop
Frontier Logo
5:27 pm - 10:41 am
STL
-
BUF
16h 14m
1 stop
$205Frontier
Tue, May 12 - Wed, May 13
Frontier Logo
2:49 pm - 12:21 am
BUF
-
STL
10h 32m
2 stops
Frontier Logo
5:27 pm - 10:41 am
STL
-
BUF
16h 14m
1 stop
$227Frontier
Mon, May 11 - Wed, May 13
Frontier Logo
11:35 am - 5:30 pm
BUF
-
STL
6h 55m
1 stop
Frontier Logo
4:17 pm - 7:12 pm
STL
-
BUF
25h 55m
1 stop
$231Frontier
Thu, Jun 18 - Thu, Jun 25
Frontier Logo
7:57 pm - 12:09 am
BUF
-
STL
29h 12m
1 stop
Frontier Logo
4:17 pm - 7:12 pm
STL
-
BUF
25h 55m
1 stop
$241Frontier
Mon, Jun 15 - Wed, Jun 17
Frontier Logo
11:35 am - 8:52 am
BUF
-
STL
22h 17m
1 stop
Frontier Logo
5:06 pm - 10:40 am
STL
-
BUF
16h 34m
1 stop
$244Frontier
Sun, Jun 21 - Sat, Jun 27
Frontier Logo
2:49 pm - 12:21 am
BUF
-
STL
10h 32m
2 stops
Frontier Logo
5:27 pm - 10:41 am
STL
-
BUF
16h 14m
1 stop
$245Frontier
Mon, May 11 - Wed, May 13
Frontier Logo
10:05 pm - 12:09 am
BUF
-
STL
27h 04m
1 stop
Frontier Logo
4:17 pm - 7:12 pm
STL
-
BUF
25h 55m
1 stop
$255Frontier
Sat, Jun 27 - Tue, Jun 30

Frontier flights from Buffalo to St. Louis

Our best Frontier deals on Buffalo to St. Louis flight tickets
Frontier
May 14
BUF11:36 amBuffalo
6h 18m
1 stop
STL4:54 pmLambert-St Louis
May 16
STL4:19 pmLambert-St Louis
25h 27m
1 stop
BUF6:46 pmBuffalo
$171
Frontier
Jun 4
BUF11:36 amBuffalo
6h 57m
1 stop
STL5:33 pmLambert-St Louis
Jun 7
STL4:19 pmLambert-St Louis
25h 40m
1 stop
BUF6:59 pmBuffalo
$191
Frontier
May 14
BUF11:36 amBuffalo
6h 18m
1 stop
STL4:54 pmLambert-St Louis
May 16
STL4:19 pmLambert-St Louis
25h 27m
1 stop
BUF6:46 pmBuffalo
$192

Southwest flights from Buffalo to St. Louis

Our best Southwest deals on Buffalo to St. Louis flight tickets
Southwest
May 11
BUF8:00 pmBuffalo
3h 45m
1 stop
STL10:45 pmLambert-St Louis
May 13
STL1:15 pmLambert-St Louis
4h 00m
1 stop
BUF6:15 pmBuffalo
$287
Southwest
Sep 15
BUF6:00 amBuffalo
7h 10m
2 stops
STL12:10 pmLambert-St Louis
Sep 18
STL5:10 amLambert-St Louis
5h 40m
1 stop
BUF11:50 amBuffalo
$293
Southwest
May 11
BUF8:00 pmBuffalo
3h 45m
1 stop
STL10:45 pmLambert-St Louis
May 13
STL1:15 pmLambert-St Louis
4h 00m
1 stop
BUF6:15 pmBuffalo
$327

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 April 24, 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

Thu 5/14

11:36 am-4:54 pm

1 stop6h 18m

Lambert-St Louis

Sat 5/16

4:19 pm-6:46 pm

1 stop25h 27m

$171

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 6/4

11:36 am-5:33 pm

1 stop6h 57m

Lambert-St Louis

Sun 6/7

4:19 pm-6:59 pm

1 stop25h 40m

$191

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 5/14

11:36 am-4:54 pm

1 stop6h 18m

Lambert-St Louis

Sat 5/16

4:19 pm-6:46 pm

1 stop25h 27m

$192
Quickest round-trip

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 5/12

11:36 am-5:33 pm

1 stop6h 57m

Lambert-St Louis

Wed 5/13

5:27 pm-10:41 am

1 stop16h 14m

$205

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 5/11

2:49 pm-12:21 am

2 stops10h 32m

Lambert-St Louis

Wed 5/13

5:27 pm-10:41 am

1 stop16h 14m

$227

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 6/18

11:35 am-5:30 pm

1 stop6h 55m

Lambert-St Louis

Thu 6/25

4:17 pm-7:12 pm

1 stop25h 55m

$231

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 6/15

7:57 pm-12:09 am

1 stop29h 12m

Lambert-St Louis

Wed 6/17

4:17 pm-7:12 pm

1 stop25h 55m

$241

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sun 6/21

11:35 am-8:52 am

1 stop22h 17m

Lambert-St Louis

Sat 6/27

5:06 pm-10:40 am

1 stop16h 34m

$244

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 5/11

2:49 pm-12:21 am

2 stops10h 32m

Lambert-St Louis

Wed 5/13

5:27 pm-10:41 am

1 stop16h 14m

$245

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 6/27

10:05 pm-12:09 am

1 stop27h 04m

Lambert-St Louis

Tue 6/30

4:17 pm-7:12 pm

1 stop25h 55m

$255

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 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

3h 45m

Direct flights

None
The fastest flight from Buffalo to St. Louis takes 3h 45m
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 3h 45m, 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
8,451 reviews
Search Delta flights
American AirlinesPriceFrom $236Free CancellationRating
7.1
11,666 reviews
Search American Airlines flights
SouthwestPriceFrom $317Free CancellationRating
8.0
4,334 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
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Wentzville
Alton
Fenton
Farmington
Festus
Clayton
Eureka
Litchfield
Edwardsville
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.

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
Sun 5/24
Sun 5/31
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States