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Cheap flights from St. Louis to Buffalo from $139

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 11/13. 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

Enter your travel dates to find the best prices.
Frontier Logo
3:30 pm - 2:15 pmSTL-BUF
21h 45m1 stop
Frontier Logo
3:18 pm - 10:33 pmBUF-STL
8h 15m1 stop
$231Frontier
Find Deal
Fri, Dec 5 - Mon, Dec 8
Frontier Logo
2:12 pm - 11:44 amSTL-BUF
20h 32m1 stop
Frontier Logo
11:40 am - 11:57 pmBUF-STL
13h 17m1 stop
$238Frontier
Find Deal
Sun, Nov 16 - Thu, Nov 20
Frontier Logo
3:30 pm - 2:15 pmSTL-BUF
21h 45m1 stop
Frontier Logo
11:40 am - 10:33 pmBUF-STL
11h 53m2 stops
$256Frontier
Find Deal
Fri, Dec 5 - Mon, Dec 8
Delta Logo
6:00 am - 1:02 pmSTL-BUF
6h 02m1 stop
Delta Logo
10:30 am - 3:52 pmBUF-STL
6h 22m1 stop
$257Delta
Find Deal
Sat, Feb 28 - Mon, Mar 2
Delta Logo
6:25 am - 2:10 pmSTL-BUF
6h 45m1 stop
Delta Logo
6:00 am - 11:05 amBUF-STL
6h 05m1 stop
$307Delta
Find Deal
Fri, Jan 16 - Sun, Jan 18
Southwest Logo
5:10 am - 12:00 pmSTL-BUF
5h 50m1 stop
Southwest Logo
6:25 pm - 10:20 pmBUF-STL
4h 55m1 stop
$322Southwest
Find Deal
Fri, Nov 21 - Wed, Dec 3
Southwest Logo
2:30 pm - 9:50 pmSTL-BUF
6h 20m1 stop
Southwest Logo
12:40 pm - 7:30 pmBUF-STL
7h 50m2 stops
$327Southwest
Find Deal
Fri, Nov 21 - Wed, Dec 3
American Airlines Logo
5:10 pm - 10:46 pmSTL-BUF
4h 36m1 stop
American Airlines Logo
8:00 pm - 11:32 pmBUF-STL
4h 32m1 stop
$362American Airlines
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Wed, Mar 11 - Mon, Mar 16
United Airlines Logo
7:30 am - 7:06 pmSTL-BUF
10h 36m2 stops
United Airlines Logo
6:45 pm - 11:50 pmBUF-STL
6h 05m1 stop
$417United Airlines
Find Deal
Wed, Mar 11 - Mon, Mar 16
United Airlines Logo
11:05 am - 10:58 pmSTL-BUF
10h 53m2 stops
United Airlines Logo
6:00 am - 3:47 pmBUF-STL
10h 47m2 stops
$422United Airlines
Find Deal
Thu, Nov 13 - Tue, Nov 18

Frontier flights from St. Louis to Buffalo

Our best Frontier deals on St. Louis to Buffalo flight tickets
Frontier
Dec 5
STL3:30 pmLambert-St Louis
21h 45m
1 stop
BUF2:15 pmBuffalo
Dec 8
BUF3:18 pmBuffalo
8h 15m
1 stop
STL10:33 pmLambert-St Louis
$231
Find similar
Frontier
Nov 16
STL2:12 pmLambert-St Louis
20h 32m
1 stop
BUF11:44 amBuffalo
Nov 20
BUF11:40 amBuffalo
13h 17m
1 stop
STL11:57 pmLambert-St Louis
$238
Find similar
Frontier
Dec 5
STL3:30 pmLambert-St Louis
21h 45m
1 stop
BUF2:15 pmBuffalo
Dec 8
BUF11:40 amBuffalo
11h 53m
2 stops
STL10:33 pmLambert-St Louis
$256
Find similar

Delta flights from St. Louis to Buffalo

Our best Delta deals on St. Louis to Buffalo flight tickets
Delta
Feb 28
STL6:00 amLambert-St Louis
6h 02m
1 stop
BUF1:02 pmBuffalo
Mar 2
BUF10:30 amBuffalo
6h 22m
1 stop
STL3:52 pmLambert-St Louis
$257
Find similar
Delta
Jan 16
STL6:25 amLambert-St Louis
6h 45m
1 stop
BUF2:10 pmBuffalo
Jan 18
BUF6:00 amBuffalo
6h 05m
1 stop
STL11:05 amLambert-St Louis
$307
Find similar
Delta
Jan 2
STL5:59 pmLambert-St Louis
4h 29m
1 stop
BUF11:28 pmBuffalo
Jan 5
BUF2:54 pmBuffalo
6h 12m
1 stop
STL8:06 pmLambert-St Louis
$312
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 October 30, 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

Fri 12/5

3:30 pm-2:15 pm

1 stop21h 45m

Buffalo

Mon 12/8

3:18 pm-10:33 pm

1 stop8h 15m

$231

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sun 11/16

2:12 pm-11:44 am

1 stop20h 32m

Buffalo

Thu 11/20

11:40 am-11:57 pm

1 stop13h 17m

$238

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Fri 12/5

3:30 pm-2:15 pm

1 stop21h 45m

Buffalo

Mon 12/8

11:40 am-10:33 pm

2 stops11h 53m

$256

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sat 2/28

6:00 am-1:02 pm

1 stop6h 02m

Buffalo

Mon 3/2

10:30 am-3:52 pm

1 stop6h 22m

$257

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Fri 1/16

6:25 am-2:10 pm

1 stop6h 45m

Buffalo

Sun 1/18

6:00 am-11:05 am

1 stop6h 05m

$307

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Fri 11/21

5:10 am-12:00 pm

1 stop5h 50m

Buffalo

Wed 12/3

6:25 pm-10:20 pm

1 stop4h 55m

$322

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Fri 11/21

2:30 pm-9:50 pm

1 stop6h 20m

Buffalo

Wed 12/3

12:40 pm-7:30 pm

2 stops7h 50m

$327

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Wed 3/11

5:10 pm-10:46 pm

1 stop4h 36m

Buffalo

Mon 3/16

8:00 pm-11:32 pm

1 stop4h 32m

$362

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Wed 3/11

7:30 am-7:06 pm

2 stops10h 36m

Buffalo

Mon 3/16

6:45 pm-11:50 pm

1 stop6h 05m

$417

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 11/13

11:05 am-10:58 pm

2 stops10h 53m

Buffalo

Tue 11/18

6:00 am-3:47 pm

2 stops10h 47m

$422

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 July, then book flights to Buffalo from St. Louis during August instead. Flights to Buffalo in August, while not as cheap as those in July, 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 4h 29m 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
8,998 reviews
Search United Airlines flights
American AirlinesPriceFrom $233Free CancellationRating
7.2
11,035 reviews
Search American Airlines flights
DeltaPriceFrom $238Free CancellationRating
7.9
7,998 reviews
Search Delta flights
SouthwestPriceFrom $326Free CancellationRating
8.0
4,243 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
Tonawanda
Grand Island
Williamsville
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.

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