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Cheap flights from St. Louis to Buffalo 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 St. Louis to Buffalo departing on 10/8. 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 St. Louis to Buffalo

Cheap round-trip flights

Delta Logo
5:22 pm - 10:52 pmSTL-BUF
4h 30m1 stop
Delta Logo
11:15 am - 4:43 pmBUF-STL
6h 28m1 stop
$257Delta
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Sat, Oct 25 - Wed, Oct 29
United Airlines Logo
12:25 pm - 10:42 pmSTL-BUF
9h 17m2 stops
United Airlines Logo
8:20 am - 2:27 pmBUF-STL
7h 07m1 stop
$262United Airlines
Find Deal
Sat, Oct 11 - Sat, Oct 18
American Airlines Logo
6:45 pm - 12:08 amSTL-BUF
4h 23m1 stop
American Airlines Logo
6:00 am - 11:03 amBUF-STL
6h 03m1 stop
$277American Airlines
Find Deal
Thu, Nov 13 - Tue, Nov 18
American Airlines Logo
4:49 pm - 11:39 pmSTL-BUF
5h 50m1 stop
American Airlines Logo
5:05 am - 10:17 amBUF-STL
6h 12m1 stop
$278American Airlines
Find Deal
Sat, Dec 6 - Mon, Dec 8
Frontier Logo
11:32 am - 11:36 amSTL-BUF
23h 04m1 stop
Frontier Logo
7:14 pm - 9:07 amBUF-STL
14h 53m2 stops
$286Frontier
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Fri, Oct 10 - Thu, Oct 16
Frontier Logo
7:55 pm - 11:22 amSTL-BUF
14h 27m2 stops
Frontier Logo
7:41 pm - 3:04 pmBUF-STL
20h 23m2 stops
$290Frontier
Find Deal
Thu, Oct 2 - Sun, Oct 5
Multiple Airlines Logo
10:35 am - 11:22 amSTL-BUF
23h 47m2 stops
Multiple Airlines Logo
4:57 pm - 9:06 amBUF-STL
17h 09m1 stop
$310Multiple Airlines
Find Deal
Thu, Oct 2 - Sun, Oct 5
Southwest Logo
4:20 pm - 11:20 pmSTL-BUF
6h 00m1 stop
Southwest Logo
8:40 pm - 12:05 amBUF-STL
4h 25m1 stop
$312Southwest
Find Deal
Sat, Nov 22 - Mon, Dec 1
Southwest Logo
1:55 pm - 10:15 pmSTL-BUF
7h 20m1 stop
Southwest Logo
6:00 am - 12:35 pmBUF-STL
7h 35m2 stops
$317Southwest
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Sat, Dec 6 - Mon, Dec 8
Multiple Airlines Logo
10:57 am - 8:18 pmSTL-BUF
32h 21m2 stops
Multiple Airlines Logo
5:24 pm - 9:07 amBUF-STL
16h 43m1 stop
$319Multiple Airlines
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Thu, Oct 9 - Mon, Oct 20

Frontier flights from St. Louis to Buffalo

Our best Frontier deals on St. Louis to Buffalo flight tickets
Frontier
Oct 10
STL11:32 amLambert-St Louis
23h 04m
1 stop
BUF11:36 amBuffalo
Oct 16
BUF7:14 pmBuffalo
14h 53m
2 stops
STL9:07 amLambert-St Louis
$286
Find similar
Frontier
Oct 2
STL7:55 pmLambert-St Louis
14h 27m
2 stops
BUF11:22 amBuffalo
Oct 5
BUF7:41 pmBuffalo
20h 23m
2 stops
STL3:04 pmLambert-St Louis
$290
Find similar
Frontier
Oct 10
STL11:32 amLambert-St Louis
32h 17m
2 stops
BUF8:49 pmBuffalo
Oct 20
BUF5:24 pmBuffalo
16h 43m
1 stop
STL9:07 amLambert-St Louis
$292
Find similar

United Airlines flights from St. Louis to Buffalo

Our best United Airlines deals on St. Louis to Buffalo flight tickets
United Airlines
Oct 11
STL12:25 pmLambert-St Louis
9h 17m
2 stops
BUF10:42 pmBuffalo
Oct 18
BUF8:20 amBuffalo
7h 07m
1 stop
STL2:27 pmLambert-St Louis
$262
Find similar
United Airlines
Oct 11
STL12:25 pmLambert-St Louis
9h 17m
2 stops
BUF10:42 pmBuffalo
Oct 18
BUF6:30 amBuffalo
10h 14m
2 stops
STL3:44 pmLambert-St Louis
$267
Find similar
United Airlines
Oct 12
STL5:00 amLambert-St Louis
3h 53m
1 stop
BUF9:53 amBuffalo
Oct 14
BUF7:07 amBuffalo
4h 42m
1 stop
STL10:49 amLambert-St Louis
$322
Find similar

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 September 16, 2025.
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

Sat 10/25

5:22 pm-10:52 pm

1 stop4h 30m

Buffalo

Wed 10/29

11:15 am-4:43 pm

1 stop6h 28m

$257

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sat 10/11

12:25 pm-10:42 pm

2 stops9h 17m

Buffalo

Sat 10/18

8:20 am-2:27 pm

1 stop7h 07m

$262

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 11/13

6:45 pm-12:08 am

1 stop4h 23m

Buffalo

Tue 11/18

6:00 am-11:03 am

1 stop6h 03m

$277

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sat 12/6

4:49 pm-11:39 pm

1 stop5h 50m

Buffalo

Mon 12/8

5:05 am-10:17 am

1 stop6h 12m

$278

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Fri 10/10

11:32 am-11:36 am

1 stop23h 04m

Buffalo

Thu 10/16

7:14 pm-9:07 am

2 stops14h 53m

$286

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 10/2

7:55 pm-11:22 am

2 stops14h 27m

Buffalo

Sun 10/5

7:41 pm-3:04 pm

2 stops20h 23m

$290

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 10/2

10:35 am-11:22 am

2 stops23h 47m

Buffalo

Sun 10/5

4:57 pm-9:06 am

1 stop17h 09m

$310

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sat 11/22

4:20 pm-11:20 pm

1 stop6h 00m

Buffalo

Mon 12/1

8:40 pm-12:05 am

1 stop4h 25m

$312

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sat 12/6

1:55 pm-10:15 pm

1 stop7h 20m

Buffalo

Mon 12/8

6:00 am-12:35 pm

2 stops7h 35m

$317

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 10/9

10:57 am-8:18 pm

2 stops32h 21m

Buffalo

Mon 10/20

5:24 pm-9:07 am

1 stop16h 43m

$319

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 October, then book flights to Buffalo from St. Louis during July instead. Flights to Buffalo in July, while not as cheap as those in October, still average around $346.

What is the cheapest day to depart on your flight to Buffalo?

Our data shows that Wednesday is the least expensive day to fly to Buffalo. Tickets to fly out on this day can be as low as $332. Flights from St. Louis to Buffalo on a Saturday will generally be more expensive and average around $386. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Buffalo?

In the evening is the cheapest time of day to fly from St. Louis to Buffalo when you can find flight prices for as low as $248. Flying to Buffalo in the evening is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to Buffalo, so prices are often more expensive at around $371 per ticket.

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 $404 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

Direct flights

None
There are no direct flights from St. Louis to Buffalo. There are no popular flight routes from St. Louis to Buffalo.
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  • 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 53m 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
United AirlinesPriceFrom $167Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
American AirlinesPriceFrom $236Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $238Free CancellationRating
7.9
7,957 reviews
Search Delta flights
SouthwestPriceFrom $306Free CancellationRating
8.0
4,242 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
Tonawanda
Amherst
Williamsville
Grand Island
Orchard Park
Lockport
West Seneca
East Aurora
Bowmansville
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.

An easier way to manage your Buffalo trip

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