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Cheap flights from Buffalo to St. Louis from C$ 154

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 14/8. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — STL
17 Jun — 24 Jun1
1 adult

Cheapflights Tip: The best prices from Buffalo to Lambert-St Louis are usually found in September or July, booked 44 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 12 June 2025.

Round-trip from

C$ 343

One-way from

C$ 154

Popular in

March

Cheapest in

September

Average price

C$ 528
Delta
  • Delta
  • 8/8-18/8
  • 2 total stops
  • 10h 29m total
  • Buffalo to St. Louis
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American Airlines
  • American Airlines
  • 14/8
  • 1 total stop
  • 7h 43m total
  • Buffalo to St. Louis
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Highest demand for flights based on searches. 4% potential increase in price (C$ 32 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease (C$ 7 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Buffalo to St. Louis

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 June 2025.

Fri 8/87:45 p.m.BUF - STL
1 stop5h 08mDelta
Mon 18/89:17 a.m.STL - BUF
1 stop5h 21mDelta
Deal found 12/6C$ 343
Tue 26/84:05 p.m.BUF - STL
2 stops7h 00mSouthwest
Wed 27/81:45 p.m.STL - BUF
1 stop5h 35mSouthwest
Deal found 10/6C$ 350
Fri 13/62:10 p.m.BUF - STL
1 stop20h 02mFrontier
Sun 15/65:47 p.m.STL - BUF
1 stop13h 03mFrontier
Deal found 9/6C$ 500
Thu 26/65:54 p.m.BUF - STL
1 stop5h 51mUnited Airlines
Mon 30/65:00 a.m.STL - BUF
1 stop3h 54mUnited Airlines
Deal found 10/6C$ 536
Fri 4/76:00 a.m.BUF - STL
2 stops10h 42mAmerican Airlines
Mon 7/79:09 a.m.STL - BUF
2 stops7h 27mAmerican Airlines
Deal found 12/6C$ 618

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 June 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 8/8

7:45 p.m.-11:53 p.m.

1 stop5h 08m

Lambert-St Louis

Mon 18/8

9:17 a.m.-3:38 p.m.

1 stop5h 21m

C$ 343

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 26/8

4:05 p.m.-10:05 p.m.

2 stops7h 00m

Lambert-St Louis

Wed 27/8

1:45 p.m.-8:20 p.m.

1 stop5h 35m

C$ 350

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 26/6

5:54 p.m.-10:45 p.m.

1 stop5h 51m

Lambert-St Louis

Mon 30/6

5:00 a.m.-9:54 a.m.

1 stop3h 54m

C$ 536

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 4/7

6:00 a.m.-3:42 p.m.

2 stops10h 42m

Lambert-St Louis

Mon 7/7

9:09 a.m.-5:36 p.m.

2 stops7h 27m

C$ 618

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 3/7

1:12 p.m.-11:53 p.m.

2 stops11h 41m

Lambert-St Louis

Sun 6/7

5:40 p.m.-7:47 a.m.

1 stop13h 07m

C$ 626

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 14/8

6:29 a.m.-1:12 p.m.

1 stop7h 43m

C$ 154

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 1/7

6:04 a.m.-11:31 a.m.

1 stop6h 27m

C$ 163

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 14/8

6:00 a.m.-3:47 p.m.

2 stops10h 47m

C$ 227

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 2/8

8:30 a.m.-1:25 p.m.

2 stops5h 55m

C$ 245

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

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 9 June 2025.

The best time to book flights from Buffalo to St. Louis is 44 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, January is the cheapest month in which you can book a flight from Buffalo to St. Louis (average of C$ 365). Flying from Buffalo to St. Louis in September is currently the most expensive (average of C$ 491). 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 June 2025.

It’s optimal to fly from Buffalo to St. Louis in the afternoon. By choosing this option you can save up to 44% on the cost of your flight, compared to a flight at noon.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 mm per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

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 June 2025.
To help decide which airline to fly from Buffalo to St. Louis, see what other customers have to say about Southwest, Delta and United Airlines. 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
4,287 reviews
Check prices

Entertainment

7.6

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,287 reviews
Southwest
8.0
Very good
4,287 reviews
Check prices

Entertainment

7.6

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,950 reviews
Southwest
8.0
Very good
4,287 reviews
Check prices

Entertainment

7.6

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,790 reviews
Southwest
8.0
Very good
4,287 reviews
Check prices

Entertainment

7.6

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,287 reviews
Check prices

Entertainment

7.6

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Frontier
5.9
Fair
3,295 reviews
Southwest
8.0
Very good
4,287 reviews
Check prices

Entertainment

7.6

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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.

  • What are the cheapest airlines flying from Buffalo to St. Louis round-trip?

    Currently priced at C$ 343, Delta will fly you from Buffalo to St. Louis and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and United Airlines - these airlines can fly you to your destination from C$ 350 and C$ 536, respectively. You may be able to fly from Buffalo to St. Louis for 28% less than the average price by searching for these airlines.

  • 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$ 154. Delta flights start at C$ 163 while deals on United Airlines start at C$ 227 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, January is the cheapest month in which you can book a flight from Buffalo to St. Louis (average of C$ 365). Flying from Buffalo to St. Louis in September is currently the most expensive (average of C$ 491). 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 Buffalo?

Book flights to Buffalo 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 2 airlines flying from Buffalo to St. Louis

Discover the top 2 airlines 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 June 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapestC$ 405AverageC$ 515FlexibilityNo cancel feeOn-time63%
Search Southwest flights
United AirlinesCheapestC$ 499AverageC$ 665FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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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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