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Cheap flights from St. Louis to Buffalo from $142

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Buffalo departing on 2/15. 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

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Find the cheapest flights from St. Louis to Buffalo

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:20 pm - 10:52 am
STL
-
BUF
13h 32m
1 stop
Frontier Logo
2:19 pm - 6:51 am
BUF
-
STL
17h 32m
1 stop
$204Frontier
ven., févr. 13 - dim., févr. 15
Frontier Logo
8:13 pm - 12:13 pm
STL
-
BUF
15h 00m
1 stop
Frontier Logo
1:08 pm - 10:30 am
BUF
-
STL
22h 22m
1 stop
$269Frontier
mer., avr. 15 - sam., avr. 18
Frontier Logo
8:20 pm - 5:45 pm
STL
-
BUF
20h 25m
2 stops
Frontier Logo
2:19 pm - 6:51 am
BUF
-
STL
17h 32m
1 stop
$302Frontier
ven., févr. 13 - dim., févr. 15
Frontier Logo
4:55 pm - 10:30 am
STL
-
BUF
16h 35m
2 stops
Frontier Logo
1:08 pm - 10:30 am
BUF
-
STL
22h 22m
1 stop
$315Frontier
mer., avr. 15 - sam., avr. 18
United Airlines Logo
1:13 pm - 9:02 pm
STL
-
BUF
6h 49m
1 stop
United Airlines Logo
7:00 am - 12:11 pm
BUF
-
STL
6h 11m
1 stop
$317United Airlines
mar., juin 16 - mar., juin 23
Frontier Logo
7:47 am - 10:49 am
STL
-
BUF
26h 02m
1 stop
Frontier Logo
9:25 pm - 1:19 pm
BUF
-
STL
16h 54m
2 stops
$319Frontier
ven., mars 6 - dim., mars 8
Frontier Logo
8:13 pm - 12:13 pm
STL
-
BUF
15h 00m
1 stop
Frontier Logo
11:25 am - 11:19 pm
BUF
-
STL
12h 54m
1 stop
$336Frontier
ven., avr. 24 - dim., avr. 26
Delta Logo
6:04 pm - 11:59 pm
STL
-
BUF
4h 55m
1 stop
Delta Logo
6:25 am - 9:26 am
BUF
-
STL
4h 01m
1 stop
$342Delta
mer., juin 3 - sam., juin 6
Frontier Logo
1:09 pm - 10:49 am
STL
-
BUF
20h 40m
2 stops
Frontier Logo
9:25 pm - 7:02 am
BUF
-
STL
10h 37m
1 stop
$348Frontier
ven., mars 6 - dim., mars 8
United Airlines Logo
6:00 am - 2:13 pm
STL
-
BUF
7h 13m
2 stops
United Airlines Logo
7:00 am - 12:11 pm
BUF
-
STL
6h 11m
1 stop
$349United Airlines
mar., juin 16 - mar., juin 23

Frontier flights from St. Louis to Buffalo

Our best Frontier deals on St. Louis to Buffalo flight tickets
Frontier
Feb 13
STL8:20 pmLambert-St Louis
13h 32m
1 stop
BUF10:52 amBuffalo
Feb 15
BUF2:19 pmBuffalo
17h 32m
1 stop
STL6:51 amLambert-St Louis
$204
Frontier
Apr 15
STL8:13 pmLambert-St Louis
15h 00m
1 stop
BUF12:13 pmBuffalo
Apr 18
BUF1:08 pmBuffalo
22h 22m
1 stop
STL10:30 amLambert-St Louis
$269
Frontier
Feb 13
STL8:20 pmLambert-St Louis
20h 25m
2 stops
BUF5:45 pmBuffalo
Feb 15
BUF2:19 pmBuffalo
17h 32m
1 stop
STL6:51 amLambert-St Louis
$302

United Airlines flights from St. Louis to Buffalo

Our best United Airlines deals on St. Louis to Buffalo flight tickets
United Airlines
Jun 16
STL1:13 pmLambert-St Louis
6h 49m
1 stop
BUF9:02 pmBuffalo
Jun 23
BUF7:00 amBuffalo
6h 11m
1 stop
STL12:11 pmLambert-St Louis
$317
United Airlines
Jun 16
STL6:00 amLambert-St Louis
7h 13m
2 stops
BUF2:13 pmBuffalo
Jun 23
BUF7:00 amBuffalo
6h 11m
1 stop
STL12:11 pmLambert-St Louis
$349
United Airlines
Jun 19
STL9:23 amLambert-St Louis
8h 39m
2 stops
BUF7:02 pmBuffalo
Jun 26
BUF7:00 amBuffalo
6h 11m
1 stop
STL12:11 pmLambert-St Louis
$372

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Buffalo 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 février 3, 2026.
Use the filters below to find and compare flights from St. Louis to Buffalo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

ven. 2/13

8:20 pm-10:52 am

1 stop13h 32m

Buffalo

dim. 2/15

2:19 pm-6:51 am

1 stop17h 32m

$204

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

mer. 4/15

8:13 pm-12:13 pm

1 stop15h 00m

Buffalo

sam. 4/18

1:08 pm-10:30 am

1 stop22h 22m

$269

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

ven. 2/13

8:20 pm-5:45 pm

2 stops20h 25m

Buffalo

dim. 2/15

2:19 pm-6:51 am

1 stop17h 32m

$302

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

mer. 4/15

4:55 pm-10:30 am

2 stops16h 35m

Buffalo

sam. 4/18

1:08 pm-10:30 am

1 stop22h 22m

$315

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

mar. 6/16

1:13 pm-9:02 pm

1 stop6h 49m

Buffalo

mar. 6/23

7:00 am-12:11 pm

1 stop6h 11m

$317

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

ven. 3/6

7:47 am-10:49 am

1 stop26h 02m

Buffalo

dim. 3/8

9:25 pm-1:19 pm

2 stops16h 54m

$319

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

ven. 4/24

8:13 pm-12:13 pm

1 stop15h 00m

Buffalo

dim. 4/26

11:25 am-11:19 pm

1 stop12h 54m

$336

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

mer. 6/3

6:04 pm-11:59 pm

1 stop4h 55m

Buffalo

sam. 6/6

6:25 am-9:26 am

1 stop4h 01m

$342

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

ven. 3/6

1:09 pm-10:49 am

2 stops20h 40m

Buffalo

dim. 3/8

9:25 pm-7:02 am

1 stop10h 37m

$348

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

mar. 6/16

6:00 am-2:13 pm

2 stops7h 13m

Buffalo

mar. 6/23

7:00 am-12:11 pm

1 stop6h 11m

$349

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 Buffalo from

How to get the cheapest flight ticket from St. Louis to Buffalo

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 Buffalo?

If you aren’t able to travel during the month of November, then book flights to Buffalo from St. Louis during October instead. Flights to Buffalo in October, while not as cheap as those in November, still average around $344.

How far in advance should I book a flight to Buffalo?

You are more likely to see cheaper flights to Buffalo from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Buffalo for around $383 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buffalo from St. Louis for as low as $285 on momondo.

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

When to book flights from St. Louis to Buffalo

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

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

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

Fastest flight time

3h 50m

Direct flights

Fri

Airports in Buffalo

1 airport
The fastest flight from St. Louis to Buffalo takes 3h 50m
Direct flights go from St. Louis to Buffalo on Friday. There are no airlines offering direct flights.
There is 1 airport in Buffalo. From St. Louis there are direct flights to Buffalo (BUF).
Search flight deals

  • How far is Lambert-St Louis to Buffalo by plane?

    Buffalo is 660.3 mi away from Lambert-St Louis. Typically, this will take 3h 50m by plane in normal conditions.

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

    Prices for flights from Lambert-St Louis Airport to Buffalo Airport are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Buffalo Airport.

  • What documentation or ID do you need to fly to Buffalo Airport?

    The travel and health documents required for your trip to Buffalo Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Buffalo Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from St. Louis to Buffalo?

Best airlines flying from St. Louis to Buffalo

Compare and see reviews for airlines that fly from St. Louis to Buffalo with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $143Free CancellationRating
7.9
8,132 reviews
Search Delta flights
United AirlinesPriceFrom $167Free CancellationRating
7.4
9,229 reviews
Search United Airlines flights
American AirlinesPriceFrom $221Free CancellationRating
7.2
11,212 reviews
Search American Airlines flights
SouthwestPriceFrom $306Free CancellationRating
8.0
4,271 reviews
Search Southwest flights

Traveling to a place near Buffalo?

Book flights to Buffalo if you plan to visit one of these locations
Batavia
Cheektowaga
Amherst
Grand Island
Tonawanda
Williamsville
Orchard Park
Lockport
West Seneca
Bowmansville
East Aurora
Eden
Angola

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Buffalo. momondo saves you time and could save you money on your trip.

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

Yes. All flights to Buffalo from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Buffalo from St. Louis.

I’m not ready to book a flight from St. Louis to Buffalo right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Buffalo from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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