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Cheap flights from Buffalo to St. Louis from C$ 179

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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — STL
27 Nov — 4 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Buffalo to Lambert-St Louis are usually found in September or July, booked 82 days in advance, depart on a Thursday or Tuesday and return on a Monday

Cheap 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 28 October 2025.

Round-trip from

C$ 352

One-way from

C$ 179

Popular in

October

Cheapest in

September

Average price

C$ 590
Southwest
  • Southwest
  • 27/11-8/12
  • 2 total stops
  • 12h 20m total
  • Buffalo to St. Louis
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American Airlines
  • American Airlines
  • 11/12
  • 1 total stop
  • 5h 13m total
  • Buffalo to St. Louis
Search Deals
High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 1% potential price decrease (C$ 13 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 28 October 2025.

Thu 27/115:45 a.m.BUF - STL
1 stop5h 05mSouthwest
Mon 8/126:05 a.m.STL - BUF
1 stop7h 15mSouthwest
Deal found 26/10C$ 352
Tue 18/116:00 a.m.BUF - STL
1 stop7h 40mDelta
Wed 19/119:35 a.m.STL - BUF
1 stop6h 25mDelta
Deal found 27/10C$ 359
Tue 18/1110:50 a.m.BUF - STL
1 stop5h 57mUnited Airlines
Wed 19/116:30 a.m.STL - BUF
2 stops6h 50mUnited Airlines
Deal found 27/10C$ 366
Wed 26/113:20 p.m.BUF - STL
1 stop10h 15mSouthwest
Wed 3/126:05 a.m.STL - BUF
1 stop7h 15mSouthwest
Deal found 27/10C$ 401
Fri 28/116:40 p.m.BUF - STL
1 stop6h 10mSouthwest
Tue 2/128:25 a.m.STL - BUF
1 stop4h 00mSouthwest
Deal found 27/10C$ 436
Fri 12/123:40 p.m.BUF - STL
2 stops8h 30mSouthwest
Sun 14/122:30 p.m.STL - BUF
2 stops8h 10mSouthwest
Deal found 28/10C$ 527

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 28 October 2025.
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

Thu 27/11

5:45 a.m.-9:50 a.m.

1 stop5h 05m

Lambert-St Louis

Mon 8/12

6:05 a.m.-2:20 p.m.

1 stop7h 15m

C$ 352

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 14/1

12:07 p.m.-4:39 p.m.

1 stop5h 32m

Lambert-St Louis

Thu 15/1

6:25 a.m.-2:10 p.m.

1 stop6h 45m

C$ 359

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 18/11

6:00 a.m.-12:40 p.m.

1 stop7h 40m

Lambert-St Louis

Wed 19/11

9:35 a.m.-5:00 p.m.

1 stop6h 25m

C$ 359

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 13/1

6:00 a.m.-12:25 p.m.

1 stop7h 25m

Lambert-St Louis

Sun 18/1

6:35 a.m.-11:24 a.m.

1 stop3h 49m

C$ 359

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 13/1

5:44 p.m.-8:45 p.m.

1 stop4h 01m

Lambert-St Louis

Thu 15/1

6:25 a.m.-2:10 p.m.

1 stop6h 45m

C$ 359

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 15/1

6:03 a.m.-9:39 a.m.

1 stop4h 36m

Lambert-St Louis

Mon 19/1

5:56 p.m.-10:59 p.m.

1 stop4h 03m

C$ 359

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 17/1

6:03 a.m.-9:39 a.m.

1 stop4h 36m

Lambert-St Louis

Mon 19/1

5:56 p.m.-10:59 p.m.

1 stop4h 03m

C$ 359

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 18/11

10:50 a.m.-3:47 p.m.

1 stop5h 57m

Lambert-St Louis

Wed 19/11

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

2 stops6h 50m

C$ 366

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 26/11

3:20 p.m.-12:35 a.m.

1 stop10h 15m

Lambert-St Louis

Wed 3/12

6:05 a.m.-2:20 p.m.

1 stop7h 15m

C$ 401

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 13/1

6:00 a.m.-12:25 p.m.

1 stop7h 25m

Lambert-St Louis

Sat 17/1

6:00 a.m.-11:42 a.m.

1 stop4h 42m

C$ 403

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/10

Showing 1-10 of 17 results
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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

How far ahead should I book a flight from Buffalo to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Buffalo to St. Louis. Price data was last updated on 24 October 2025.

The best time to book flights from Buffalo to St. Louis is 79 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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$ 157). Flying from Buffalo to St. Louis in December 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.

What is the cheapest time of day to fly from BUF to STL?

Find hourly flight availability from Buffalo to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 28 October 2025.

It’s optimal to fly from Buffalo to St. Louis in the afternoon. By choosing this option you can save up to 43% on the cost of your flight, compared to a flight at noon.

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 28 October 2025.
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
4,240 reviews
Check prices

Comfort

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,240 reviews
Southwest
8.0
Very good
4,240 reviews
Check prices

Comfort

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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$ 352, Southwest can have you in St. Louis from Buffalo in 5h 05m. 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$ 359, 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.

  • What are the cheapest airlines to fly from Buffalo to St. Louis one-way?

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at C$ 179. Delta flights start at C$ 180 while deals on United Airlines start at C$ 236 one-way.

  • 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$ 157). Flying from Buffalo to St. Louis in December 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
St. Peters

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Alternative routes for Buffalo to St. Louis

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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 28 October 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapestC$ 359AverageC$ 540FlexibilityNo cancel feeOn-time63%
Search Southwest 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?

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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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