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Cheap flights from Buffalo to St. Louis from C$ 130

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — STL
22 Aug — 29 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Buffalo to St. Louis

Enter your travel dates to find the best prices.

Cheapest flights from Buffalo to St. Louis
Explore the most affordable flight options available from Buffalo to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 July 2026.

Thu 20/811:36 a.m.
BUF
-
STL
1 stop6h 46m
Frontier
Sun 23/86:17 p.m.
STL
-
BUF
1 stop15h 12m
Frontier
Deal found 19/7C$ 231
Fri 11/91:16 p.m.
BUF
-
STL
1 stop21h 24m
Frontier
Mon 14/910:35 a.m.
STL
-
BUF
1 stop24h 46m
Frontier
Deal found 21/7C$ 235
Sun 8/111:13 p.m.
BUF
-
STL
1 stop21h 27m
Frontier
Sat 14/1110:35 a.m.
STL
-
BUF
1 stop24h 43m
Frontier
Deal found 20/7C$ 282
Tue 18/810:43 a.m.
BUF
-
STL
1 stop7h 18m
American Airlines
Tue 25/85:57 p.m.
STL
-
BUF
1 stop4h 39m
American Airlines
Deal found 21/7C$ 427

Find flight deals from Buffalo to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Buffalo (BUF) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 23 July 2026.

Round-trip from

C$ 231

One-way from

C$ 130

Popular in

March

Cheapest in

January

Average price

C$ 657
Frontier
  • Frontier
  • 20/8-23/8
  • 2 total stops
  • 21h 58m total
  • Buffalo to St. Louis
Search Deals
Frontier
  • Frontier
  • 8/9
  • 1 total stop
  • 23h 04m total
  • Buffalo to St. Louis
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (C$ 184 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights 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, Cheapflights users made 629,999 searches. Data last updated 23 July 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

Sun 8/11

1:13 p.m.-9:40 a.m.

1 stop21h 27m

Lambert-St Louis

Sat 14/11

10:35 a.m.-12:18 p.m.

1 stop24h 43m

C$ 282

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 20/8

11:36 a.m.-5:22 p.m.

1 stop6h 46m

Lambert-St Louis

Sun 23/8

6:17 p.m.-6:09 p.m.

2 stops22h 52m

C$ 350

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 18/8

8:05 a.m.-4:50 p.m.

1 stop9h 45m

Lambert-St Louis

Tue 25/8

6:30 a.m.-2:20 p.m.

2 stops6h 50m

C$ 443

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 11/9

3:55 p.m.-10:05 p.m.

2 stops7h 10m

Lambert-St Louis

Mon 14/9

2:45 p.m.-9:50 p.m.

2 stops6h 05m

C$ 457
Quickest round-trip

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 15/9

6:20 a.m.-9:29 a.m.

1 stop4h 09m

Lambert-St Louis

Fri 18/9

5:59 p.m.-11:53 p.m.

1 stop4h 54m

C$ 500

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 20/8

12:02 p.m.-5:38 p.m.

1 stop6h 36m

Lambert-St Louis

Sun 23/8

6:30 a.m.-11:22 a.m.

1 stop3h 52m

C$ 500

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 23/10

12:00 p.m.-5:11 p.m.

1 stop6h 11m

Lambert-St Louis

Mon 26/10

6:00 p.m.-11:59 p.m.

1 stop4h 59m

C$ 502

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sun 8/11

3:05 p.m.-9:00 p.m.

2 stops6h 55m

Lambert-St Louis

Sat 14/11

7:00 a.m.-2:55 p.m.

2 stops6h 55m

C$ 516
Cheapest one-way

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 8/9

11:36 a.m.-9:40 a.m.

1 stop23h 04m

C$ 130
Quickest one-way

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 25/8

8:40 a.m.-11:20 a.m.

1 stop3h 40m

C$ 214

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/7

Showing 1-10 of 17 resultsSorted by cheapest first
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Best time to book a flight from Buffalo to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Buffalo with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Buffalo to St. Louis

What is the cheapest month to book a flight from Buffalo to St. Louis?

Currently, January is the cheapest month in which you can book a flight from Buffalo to St. Louis (average of C$ 452). Flying from Buffalo to St. Louis in March is currently the most expensive (average of C$ 953). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Buffalo to St. Louis?

Airfare is below average for this route at the moment.

Buffalo to St. Louis flights typically cost between C$ 504 and C$ 712 in August.
The cheapest round-trip price found within the last 5 days was C$ 231 on Frontier (20 Aug-23 Aug).

Related info for your journey

Find useful and relevant information for your journey from Buffalo to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Buffalo to St. Louis?

    For as low as C$ 443, Frontier can have you in St. Louis from Buffalo in 9h 45m. The distance between Buffalo and St. Louis is about 1081 km. This flight may include one or multiple stops.

  • Can I find deals for flights from Buffalo to St. Louis that include hotel bookings?

    Yes. In addition to deals on Buffalo to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Buffalo to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Buffalo to St. Louis.

  • Can I find deals for business class flights from Buffalo to St. Louis?

    Yes. Cheapflights offers flight deals from Buffalo to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Buffalo to St. Louis?

    Currently, January is the cheapest month in which you can book a flight from Buffalo to St. Louis (average of C$ 452). Flying from Buffalo to St. Louis in March is currently the most expensive (average of C$ 953). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Chesterfield

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Alternative routes for Buffalo to St. Louis

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How does Cheapflights help users find flights from Buffalo to St. Louis?

Cheapflights makes it easy to find Buffalo to St. Louis flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Buffalo to St. Louis?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Buffalo to St. Louis.

Can Cheapflights find flights from Buffalo to St. Louis with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Buffalo to St. Louis, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Buffalo to St. Louis become cheaper?

Yes! Start tracking prices for Buffalo to St. Louis flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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