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Cheap flights from Buffalo to St. Louis from C$ 165

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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — STL
17 Sep — 24 Sep1
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 18 August 2026.

Thu 10/93:50 p.m. -
1 stop6h 55m
Fri 11/96:05 a.m. -
1 stop8h 10m
Deal found 13/8C$ 344
Tue 15/96:20 a.m. -
1 stop4h 09m
Fri 18/95:59 p.m. -
1 stop4h 54m
Deal found 13/8C$ 356
Mon 14/91:40 p.m. -
2 stops22h 52m
Mon 21/95:19 p.m. -
1 stop23h 30m
Deal found 17/8C$ 380
Thu 10/911:45 a.m. -
1 stop5h 35m
Sat 12/95:45 a.m. -
1 stop3h 25m
Deal found 17/8C$ 428
Tue 22/912:02 p.m. -
1 stop6h 08m
Fri 25/95:59 p.m. -
1 stop4h 54m
Deal found 17/8C$ 446
Sat 19/95:45 a.m. -
2 stops8h 40m
Sat 19/92:55 p.m. -
1 stop5h 15m
Deal found 16/8C$ 453
Wed 16/96:00 a.m. -
2 stops7h 10m
Wed 23/912:50 p.m. -
2 stops7h 20m
Deal found 17/8C$ 460
Wed 23/910:33 a.m. -
2 stops12h 05m
Sat 26/99:04 a.m. -
1 stop6h 39m
Deal found 13/8C$ 462

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 18 August 2026.

Round-trip from

C$ 344

One-way from

C$ 165

Popular in

March

Cheapest in

January

Average price

C$ 542
Southwest
  • Southwest
  • 10/9-11/9
  • 2 total stops
  • 15h 05m total
  • Buffalo to St. Louis
Search Deals
Southwest
  • Southwest
  • 10/9
  • 2 total stops
  • 7h 35m total
  • Buffalo to St. Louis
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (C$ 184 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 18 August 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 Buffalo - STL Lambert-St Louis

BUFSTL

Buffalo

Thu 10/9

3:50 p.m.-10:25 p.m.

2 stops7h 35m

Lambert-St Louis

Fri 11/9

6:05 a.m.-3:15 p.m.

1 stop8h 10m

C$ 351
Quickest round-trip

BuffaloSt. Louis

BUF Buffalo - STL Lambert-St Louis

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$ 356

BuffaloSt. Louis

BUF Buffalo - STL Lambert-St Louis

BUFSTL

Buffalo

Mon 14/9

5:40 a.m.-11:35 a.m.

1 stop6h 55m

Lambert-St Louis

Mon 21/9

6:05 a.m.-10:45 a.m.

1 stop3h 40m

C$ 428

BuffaloSt. Louis

BUF Buffalo - STL Lambert-St Louis

BUFSTL

Buffalo

Wed 21/10

7:00 p.m.-10:00 p.m.

1 stop4h 00m

Lambert-St Louis

Tue 27/10

11:25 a.m.-6:20 p.m.

1 stop5h 55m

C$ 428

BuffaloSt. Louis

BUF Buffalo - STL Lambert-St Louis

BUFSTL

Buffalo

Thu 22/10

4:50 p.m.-11:45 p.m.

1 stop7h 55m

Lambert-St Louis

Sun 25/10

5:45 a.m.-10:15 a.m.

1 stop3h 30m

C$ 489

BuffaloSt. Louis

BUF Buffalo - STL Lambert-St Louis

BUFSTL

Buffalo

Fri 23/10

12:35 p.m.-5:10 p.m.

1 stop5h 35m

Lambert-St Louis

Sun 25/10

5:45 a.m.-10:15 a.m.

1 stop3h 30m

C$ 507

BuffaloSt. Louis

BUF Buffalo - STL Lambert-St Louis

BUFSTL

Buffalo

Sat 29/8

5:58 p.m.-10:59 p.m.

1 stop6h 01m

Lambert-St Louis

Wed 2/9

7:25 a.m.-1:16 p.m.

1 stop4h 51m

C$ 525

BuffaloSt. Louis

BUF Buffalo - STL Lambert-St Louis

BUFSTL

Buffalo

Wed 23/9

10:33 a.m.-9:38 p.m.

2 stops12h 05m

Lambert-St Louis

Sat 26/9

9:04 a.m.-4:43 p.m.

1 stop6h 39m

C$ 546

BuffaloSt. Louis

BUF Buffalo - STL Lambert-St Louis

BUFSTL

Buffalo

Thu 29/10

6:30 a.m.-12:10 p.m.

1 stop6h 40m

Lambert-St Louis

Fri 30/10

1:08 p.m.-8:36 p.m.

1 stop6h 28m

C$ 557
Cheapest one-way

BuffaloSt. Louis

BUF Buffalo - STL Lambert-St Louis

BUFSTL

Buffalo

Thu 10/9

3:50 p.m.-10:25 p.m.

2 stops7h 35m

C$ 165

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/8

Showing 1-10 of 19 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$ 445). Flying from Buffalo to St. Louis in March is currently the most expensive (average of C$ 937). 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$ 542 and C$ 593 in September.
The cheapest round-trip price found within the last 5 days was C$ 344 on Southwest (10 Sep-11 Sep).

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$ 356, Southwest can have you in St. Louis from Buffalo in 4h 09m. 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$ 445). Flying from Buffalo to St. Louis in March is currently the most expensive (average of C$ 937). 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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Buffalo to Kansas City flights

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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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