Find flights
When to book
Airlines
FAQs

Cheap flights from Buffalo to St. Louis from C$ 223

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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — STL
16 mar — 23 mar1
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 14 febbraio 2026.

mar 3/37:17 p.m.
BUF
-
STL
1 stop28h 10m
Frontier
ven 6/37:47 a.m.
STL
-
BUF
1 stop11h 43m
Frontier
Deal found 13/2C$ 334
mar 3/37:17 p.m.
BUF
-
STL
1 stop28h 10m
Frontier
gio 5/33:49 p.m.
STL
-
BUF
1 stop18h 00m
Frontier
Deal found 13/2C$ 346
ven 1/55:50 p.m.
BUF
-
STL
1 stop4h 18m
United Airlines
mar 5/59:00 a.m.
STL
-
BUF
1 stop6h 54m
United Airlines
Deal found 11/2C$ 425
ven 1/54:00 p.m.
BUF
-
STL
2 stops7h 45m
Southwest
mar 5/55:35 a.m.
STL
-
BUF
1 stop3h 45m
Southwest
Deal found 11/2C$ 432
mar 7/45:57 p.m.
BUF
-
STL
1 stop4h 11m
United Airlines
lun 13/49:10 a.m.
STL
-
BUF
2 stops8h 39m
United Airlines
Deal found 13/2C$ 433
lun 16/35:59 p.m.
BUF
-
STL
1 stop6h 45m
American Airlines
ven 20/36:40 p.m.
STL
-
BUF
1 stop4h 00m
American Airlines
Deal found 13/2C$ 457
lun 9/35:55 p.m.
BUF
-
STL
1 stop6h 10m
Southwest
gio 12/35:20 a.m.
STL
-
BUF
1 stop5h 20m
Southwest
Deal found 11/2C$ 466
mer 11/35:29 p.m.
BUF
-
STL
1 stop6h 30m
United Airlines
mer 18/36:25 a.m.
STL
-
BUF
2 stops6h 49m
United Airlines
Deal found 10/2C$ 493

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 14 febbraio 2026.

Round-trip from

C$ 334

One-way from

C$ 223

Popular in

February

Cheapest in

September

Average price

C$ 666
Frontier
  • Frontier
  • 3/3-6/3
  • 2 total stops
  • 39h 53m total
  • Buffalo to St. Louis
Search Deals
United Airlines
  • United Airlines
  • 8/7
  • 2 total stops
  • 7h 17m total
  • Buffalo to St. Louis
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 100 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 14 febbraio 2026.
Use the filters below to find and compare flights from Buffalo to St. Louis that are best for you.

Fly from

Buffalo

Fly to

St. Louis

Route

Depart

Return

Price

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

mar 3/3

7:17 p.m.-10:27 p.m.

1 stop28h 10m

Lambert-St Louis

ven 6/3

7:47 a.m.-8:30 p.m.

1 stop11h 43m

C$ 334

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

ven 1/5

5:50 p.m.-9:08 p.m.

1 stop4h 18m

Lambert-St Louis

mar 5/5

9:00 a.m.-4:54 p.m.

1 stop6h 54m

C$ 425

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

ven 1/5

4:00 p.m.-10:45 p.m.

2 stops7h 45m

Lambert-St Louis

mar 5/5

5:35 a.m.-10:20 a.m.

1 stop3h 45m

C$ 432

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

lun 16/3

5:59 p.m.-11:44 p.m.

1 stop6h 45m

Lambert-St Louis

ven 20/3

6:40 p.m.-11:40 p.m.

1 stop4h 00m

C$ 457

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

lun 9/3

5:55 p.m.-11:05 p.m.

1 stop6h 10m

Lambert-St Louis

gio 12/3

5:20 a.m.-11:40 a.m.

1 stop5h 20m

C$ 466

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

lun 20/4

4:00 p.m.-11:15 p.m.

2 stops8h 15m

Lambert-St Louis

mer 22/4

2:30 p.m.-10:15 p.m.

2 stops6h 45m

C$ 472

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

mer 11/3

5:29 p.m.-10:59 p.m.

1 stop6h 30m

Lambert-St Louis

mer 18/3

6:25 a.m.-2:14 p.m.

2 stops6h 49m

C$ 493

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

gio 28/5

6:00 a.m.-10:27 a.m.

1 stop5h 27m

Lambert-St Louis

sab 30/5

1:13 p.m.-9:03 p.m.

1 stop6h 50m

C$ 500

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

ven 12/6

7:00 a.m.-10:34 a.m.

1 stop4h 34m

Lambert-St Louis

sab 13/6

9:23 a.m.-4:40 p.m.

1 stop6h 17m

C$ 500

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

mer 8/7

2:54 p.m.-9:11 p.m.

2 stops7h 17m

C$ 223

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/2

Showing 1-10 of 15 results
1
2

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$ 426). 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?

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated 14 febbraio 2026.
Check out reviews from past customers who have flown with Southwest from Buffalo to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,284 reviews
Check prices

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,284 reviews
Southwest
8.0
Very good
4,284 reviews
Check prices

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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$ 425, Frontier can have you in St. Louis from Buffalo in 4h 18m. The distance between Buffalo and St. Louis is about 1081 km. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Buffalo to St. Louis round-trip?

    Currently priced at C$ 349, Southwest will fly you from Buffalo to St. Louis and back. In addition to Southwest, many other airlines offer competitively priced options for your trip. You may be able to fly from Buffalo to St. Louis for 28% less than the average price by searching for this airline.

  • 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$ 426). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Buffalo to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Buffalo to Kansas City flights

Top airline flying from Buffalo to St. Louis

Discover the top airline that operate flights from Buffalo to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 14 febbraio 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapestC$ 349AverageC$ 608FlexibilityNo cancel feeOn-time63%
Search Southwest flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.