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Cheap flights from Buffalo to St. Louis from C$ 232

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 31/12. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — STL
11 Jan — 18 Jan1
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 12 December 2025.

Thu 25/125:52 p.m.BUF - STL
1 stop3h 49mDelta
Mon 29/125:13 p.m.STL - BUF
1 stop5h 34mDelta
Deal found 9/12C$ 462
Sat 27/126:30 a.m.BUF - STL
1 stop6h 57mUnited Airlines
Wed 31/129:55 a.m.STL - BUF
1 stop5h 59mUnited Airlines
Deal found 11/12C$ 559
Thu 25/1210:29 a.m.BUF - STL
2 stops6h 58mUnited Airlines
Mon 29/123:10 p.m.STL - BUF
1 stop4h 44mUnited Airlines
Deal found 9/12C$ 570
Fri 26/126:30 a.m.BUF - STL
1 stop6h 57mUnited Airlines
Tue 30/126:30 a.m.STL - BUF
2 stops6h 44mUnited Airlines
Deal found 11/12C$ 643
Fri 26/128:40 p.m.BUF - STL
1 stop4h 25mSouthwest
Sun 4/16:45 a.m.STL - BUF
2 stops6h 50mSouthwest
Deal found 11/12C$ 666
Sun 28/125:00 a.m.BUF - STL
1 stop8h 30mSouthwest
Tue 30/124:50 p.m.STL - BUF
1 stop5h 45mSouthwest
Deal found 11/12C$ 695
Sat 20/126:10 a.m.BUF - STL
1 stop4h 14mDelta
Tue 30/125:59 p.m.STL - BUF
1 stop4h 29mDelta
Deal found 10/12C$ 706
Sat 20/1211:20 a.m.BUF - STL
2 stops8h 25mSouthwest
Tue 30/124:50 p.m.STL - BUF
1 stop5h 45mSouthwest
Deal found 10/12C$ 713
Mon 29/128:40 p.m.BUF - STL
1 stop4h 25mSouthwest
Wed 31/128:30 a.m.STL - BUF
1 stop3h 55mSouthwest
Deal found 11/12C$ 724

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 12 December 2025.

Round-trip from

C$ 407

One-way from

C$ 232

Popular in

January

Cheapest in

September

Average price

C$ 546
Frontier
  • Frontier
  • 6/3-8/3
  • 2 total stops
  • 27h 40m total
  • Buffalo to St. Louis
Search Deals
United Airlines
  • United Airlines
  • 31/12
  • 1 total stop
  • 6h 08m total
  • Buffalo to St. Louis
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 73 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 12 December 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

Fri 6/3

9:25 p.m.-7:07 a.m.

1 stop10h 42m

Lambert-St Louis

Sun 8/3

4:51 p.m.-10:49 a.m.

1 stop16h 58m

C$ 407

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sun 18/1

8:30 a.m.-12:29 p.m.

1 stop4h 59m

Lambert-St Louis

Thu 22/1

12:44 p.m.-7:25 p.m.

1 stop5h 41m

C$ 462

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 25/12

5:52 p.m.-8:41 p.m.

1 stop3h 49m

Lambert-St Louis

Mon 29/12

5:13 p.m.-11:47 p.m.

1 stop5h 34m

C$ 462

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 6/3

5:50 p.m.-12:05 a.m.

2 stops7h 15m

Lambert-St Louis

Sun 8/3

8:25 a.m.-5:55 p.m.

2 stops8h 30m

C$ 548

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 27/12

6:30 a.m.-12:27 p.m.

1 stop6h 57m

Lambert-St Louis

Wed 31/12

9:55 a.m.-4:54 p.m.

1 stop5h 59m

C$ 559

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 31/12

5:35 p.m.-10:43 p.m.

1 stop6h 08m

C$ 232

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 26/3

4:57 p.m.-11:42 p.m.

1 stop7h 45m

C$ 254

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 26/3

6:15 p.m.-12:40 a.m.

1 stop7h 25m

C$ 254

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 17/12

1:16 p.m.-5:10 p.m.

1 stop4h 54m

C$ 399

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 18/12

3:40 p.m.-11:10 p.m.

2 stops8h 30m

C$ 405

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

Showing 1-10 of 12 results
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, August is the cheapest month in which you can book a flight from Buffalo to St. Louis (average of C$ 154). Flying from Buffalo to St. Louis in February is currently the most expensive (average of C$ 425). 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 12 December 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.

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 12 December 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
7.9
Good
4,253 reviews
Check prices

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Overall

7.9

Boarding

8.1

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
7.9
Good
4,253 reviews
Southwest
7.9
Good
4,253 reviews
Check prices

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Overall

7.9

Boarding

8.1

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$ 462, Frontier can have you in St. Louis from Buffalo in 4h 59m. 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$ 354, 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$ 154). Flying from Buffalo to St. Louis in February is currently the most expensive (average of C$ 425). 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

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 12 December 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapestC$ 354AverageC$ 581FlexibilityNo cancel feeOn-time63%
Search Southwest flights

Fly with Cheapflights

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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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