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Cheap flights from Buffalo to St. Louis from C$ 195

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 24/4. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — STL
12 Apr — 19 Apr1
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 13 March 2026.

Mon 4/56:15 a.m.
BUF
-
STL
1 stop8h 30m
Southwest
Wed 13/55:35 a.m.
STL
-
BUF
1 stop3h 45m
Southwest
Deal found 13/3C$ 393
Wed 1/46:00 p.m.
BUF
-
STL
1 stop4h 52m
United Airlines
Sat 4/48:21 a.m.
STL
-
BUF
1 stop3h 51m
United Airlines
Deal found 8/3C$ 433
Thu 23/48:00 p.m.
BUF
-
STL
1 stop3h 45m
Southwest
Sun 26/45:25 a.m.
STL
-
BUF
1 stop4h 00m
Southwest
Deal found 12/3C$ 468
Mon 1/64:00 p.m.
BUF
-
STL
2 stops8h 15m
Southwest
Wed 3/62:10 p.m.
STL
-
BUF
2 stops7h 45m
Southwest
Deal found 9/3C$ 479
Mon 4/55:55 p.m.
BUF
-
STL
1 stop4h 18m
United Airlines
Tue 5/59:21 a.m.
STL
-
BUF
1 stop6h 33m
United Airlines
Deal found 11/3C$ 488
Fri 3/46:55 p.m.
BUF
-
STL
1 stop6h 02m
United Airlines
Mon 6/49:10 a.m.
STL
-
BUF
1 stop7h 00m
United Airlines
Deal found 8/3C$ 491

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 13 March 2026.

Round-trip from

C$ 393

One-way from

C$ 195

Popular in

March

Cheapest in

September

Average price

C$ 782
Southwest
  • Southwest
  • 4/5-13/5
  • 2 total stops
  • 12h 15m total
  • Buffalo to St. Louis
Search Deals
Frontier
  • Frontier
  • 24/4
  • 1 total stop
  • 19h 32m total
  • Buffalo to St. Louis
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (C$ 190 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 13 March 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

Mon 1/6

8:00 p.m.-10:45 p.m.

1 stop3h 45m

Lambert-St Louis

Wed 3/6

1:45 p.m.-10:15 p.m.

2 stops7h 30m

C$ 400

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 1/4

7:00 a.m.-10:45 a.m.

1 stop4h 45m

Lambert-St Louis

Sat 4/4

7:45 a.m.-6:13 p.m.

2 stops9h 28m

C$ 439
Quickest round-trip

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 4/5

5:55 p.m.-9:13 p.m.

1 stop4h 18m

Lambert-St Louis

Tue 5/5

9:21 a.m.-4:54 p.m.

1 stop6h 33m

C$ 488

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 5/6

2:50 p.m.-8:50 p.m.

2 stops7h 00m

Lambert-St Louis

Sun 7/6

8:00 p.m.-8:10 a.m.

1 stop11h 10m

C$ 514
Cheapest one-way

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 24/4

12:18 p.m.-6:50 a.m.

1 stop19h 32m

C$ 195

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 1/4

1:02 p.m.-5:34 p.m.

1 stop29h 32m

C$ 223

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 5/8

8:55 a.m.-2:50 p.m.

1 stop6h 55m

C$ 235
Quickest one-way

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sun 9/8

7:00 a.m.-12:11 p.m.

1 stop6h 11m

C$ 312

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 15/5

10:35 a.m.-9:13 p.m.

2 stops11h 38m

C$ 442

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 1/4

1:02 p.m.-9:17 p.m.

3 stops33h 15m

C$ 505

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/3

Sorted by cheapest first

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, August is the cheapest month in which you can book a flight from Buffalo to St. Louis (average of C$ 152). Flying from Buffalo to St. Louis in February is currently the most expensive (average of C$ 424). 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.

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$ 400, Southwest can have you in St. Louis from Buffalo in 3h 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, August is the cheapest month in which you can book a flight from Buffalo to St. Louis (average of C$ 152). Flying from Buffalo to St. Louis in February is currently the most expensive (average of C$ 424). 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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