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Cheap flights from Buffalo to St. Louis from C$ 150

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 30/6. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — STL
18 Jun — 25 Jun1
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 19 May 2026.

Fri 26/62:50 p.m.
BUF
-
STL
1 stop19h 02m
Frontier
Tue 30/66:31 p.m.
STL
-
BUF
1 stop18h 24m
Frontier
Deal found 17/5C$ 270
Mon 15/62:50 p.m.
BUF
-
STL
1 stop27h 40m
Frontier
Sun 21/66:31 p.m.
STL
-
BUF
1 stop18h 24m
Frontier
Deal found 17/5C$ 276
Tue 16/64:25 p.m.
BUF
-
STL
2 stops7h 35m
Southwest
Wed 24/63:15 p.m.
STL
-
BUF
2 stops6h 25m
Southwest
Deal found 19/5C$ 450
Tue 15/912:50 p.m.
BUF
-
STL
1 stop4h 59m
Delta
Fri 18/92:18 p.m.
STL
-
BUF
1 stop3h 39m
Delta
Deal found 19/5C$ 484
Wed 10/611:00 a.m.
BUF
-
STL
2 stops8h 25m
Southwest
Mon 15/64:35 p.m.
STL
-
BUF
2 stops6h 35m
Southwest
Deal found 19/5C$ 498
Fri 12/611:00 a.m.
BUF
-
STL
2 stops8h 30m
Southwest
Tue 16/63:15 p.m.
STL
-
BUF
2 stops6h 25m
Southwest
Deal found 18/5C$ 512
Fri 28/83:55 p.m.
BUF
-
STL
1 stop6h 45m
Southwest
Sun 30/86:00 a.m.
STL
-
BUF
1 stop3h 50m
Southwest
Deal found 15/5C$ 532
Thu 2/74:10 p.m.
BUF
-
STL
2 stops7h 35m
Southwest
Mon 6/74:25 p.m.
STL
-
BUF
2 stops6h 45m
Southwest
Deal found 15/5C$ 546
Mon 27/75:55 p.m.
BUF
-
STL
1 stop6h 15m
Southwest
Wed 29/75:40 a.m.
STL
-
BUF
2 stops7h 40m
Southwest
Deal found 18/5C$ 551

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 19 May 2026.

Round-trip from

C$ 270

One-way from

C$ 150

Popular in

March

Cheapest in

December

Average price

C$ 494
Frontier
  • Frontier
  • 26/6-30/6
  • 2 total stops
  • 37h 26m total
  • Buffalo to St. Louis
Search Deals
Frontier
  • Frontier
  • 30/6
  • 1 total stop
  • 6h 40m total
  • Buffalo to St. Louis
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (C$ 236 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 19 May 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

Fri 12/6

11:00 a.m.-6:30 p.m.

2 stops8h 30m

Lambert-St Louis

Tue 16/6

3:15 p.m.-10:40 p.m.

2 stops6h 25m

C$ 512

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 9/10

7:05 p.m.-12:40 a.m.

1 stop6h 35m

Lambert-St Louis

Sun 11/10

2:40 p.m.-10:30 p.m.

1 stop6h 50m

C$ 532

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 24/7

5:55 p.m.-12:35 a.m.

2 stops7h 40m

Lambert-St Louis

Mon 27/7

4:25 p.m.-12:10 a.m.

2 stops6h 45m

C$ 546

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 2/7

4:10 p.m.-10:45 p.m.

2 stops7h 35m

Lambert-St Louis

Mon 6/7

4:25 p.m.-12:10 a.m.

2 stops6h 45m

C$ 546

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 29/6

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

2 stops7h 00m

Lambert-St Louis

Mon 6/7

4:25 p.m.-12:10 a.m.

2 stops6h 45m

C$ 573

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 26/6

5:55 p.m.-12:35 a.m.

2 stops7h 40m

Lambert-St Louis

Tue 30/6

3:15 p.m.-10:40 p.m.

2 stops6h 25m

C$ 573

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 23/6

6:02 p.m.-9:30 p.m.

1 stop4h 28m

Lambert-St Louis

Sat 27/6

1:13 p.m.-11:59 p.m.

2 stops9h 46m

C$ 587

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 15/9

6:00 a.m.-3:38 p.m.

2 stops10h 38m

Lambert-St Louis

Fri 18/9

12:59 p.m.-9:07 p.m.

1 stop7h 08m

C$ 634
Quickest round-trip

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 15/6

5:55 p.m.-10:45 p.m.

2 stops5h 50m

Lambert-St Louis

Sun 21/6

6:00 a.m.-2:25 p.m.

2 stops7h 25m

C$ 642

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 12/6

5:55 p.m.-10:45 p.m.

2 stops5h 50m

Lambert-St Louis

Sun 14/6

6:00 a.m.-2:25 p.m.

2 stops7h 25m

C$ 657

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/5

Showing 1-10 of 16 resultsSorted by cheapest first
1
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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, December is the cheapest month in which you can book a flight from Buffalo to St. Louis (average of C$ 439). Flying from Buffalo to St. Louis in March is currently the most expensive (average of C$ 876). 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?

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$ 512, Southwest can have you in St. Louis from Buffalo in 8h 30m. The distance between Buffalo and St. Louis is about 1081 km.

  • 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, December is the cheapest month in which you can book a flight from Buffalo to St. Louis (average of C$ 439). Flying from Buffalo to St. Louis in March is currently the most expensive (average of C$ 876). 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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