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Cheap flights from Buffalo to St. Louis from C$ 174

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 20/6. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — STL
6 May — 13 May1
1 adult

Cheapflights Tip: The best prices from Buffalo to Lambert-St Louis are usually found in August or September, booked 11 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 1 May 2025.

Round-trip from

C$ 337

One-way from

C$ 174

Popular in

May

Cheapest in

August

Average price

C$ 629
Delta
  • Delta
  • 4/7-12/7
  • 2 total stops
  • 10h 53m total
  • Buffalo to St. Louis
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Delta
  • Delta
  • 20/6
  • 1 total stop
  • 4h 48m total
  • Buffalo to St. Louis
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 77 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 19 potential savings vs. average RT price).
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Average for round-trip flights in May 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 1 May 2025.

Fri 4/712:10 p.m.BUF - STL
1 stop7h 34mDelta
Sat 12/76:04 p.m.STL - BUF
1 stop3h 19mDelta
Deal found 30/4C$ 337
Mon 2/62:25 p.m.BUF - STL
1 stop7h 15mSouthwest
Fri 6/64:35 p.m.STL - BUF
2 stops6h 10mSouthwest
Deal found 30/4C$ 379
Fri 13/67:00 a.m.BUF - STL
1 stop4h 45mUnited Airlines
Mon 16/66:30 a.m.STL - BUF
2 stops6h 39mUnited Airlines
Deal found 30/4C$ 420
Thu 26/69:07 p.m.BUF - STL
1 stop27h 46mFrontier
Sun 29/65:47 p.m.STL - BUF
1 stop13h 03mFrontier
Deal found 30/4C$ 543

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 1 May 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 4/7

12:10 p.m.-6:44 p.m.

1 stop7h 34m

Lambert-St Louis

Sat 12/7

6:04 p.m.-10:23 p.m.

1 stop3h 19m

C$ 337

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 2/6

2:25 p.m.-8:40 p.m.

1 stop7h 15m

Lambert-St Louis

Fri 6/6

4:35 p.m.-11:45 p.m.

2 stops6h 10m

C$ 379

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 13/6

7:00 a.m.-10:45 a.m.

1 stop4h 45m

Lambert-St Louis

Mon 16/6

6:30 a.m.-2:09 p.m.

2 stops6h 39m

C$ 420

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 26/6

9:07 p.m.-11:53 p.m.

1 stop27h 46m

Lambert-St Louis

Sun 29/6

5:47 p.m.-7:50 a.m.

1 stop13h 03m

C$ 543

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 20/6

7:39 p.m.-11:27 p.m.

1 stop4h 48m

C$ 174

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 14/8

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

2 stops10h 47m

C$ 229

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sun 17/8

5:50 p.m.-11:50 p.m.

2 stops7h 00m

C$ 275

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/4

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 25 April 2025.

The best time to book flights from Buffalo to St. Louis is 11 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 1 May 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 1 May 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
4,294 reviews
Check prices

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Southwest
8.0
Very good
4,294 reviews
Southwest
8.0
Very good
4,294 reviews
Check prices

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Delta
8.0
Very good
7,934 reviews
Southwest
8.0
Very good
4,294 reviews
Check prices

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
United Airlines
7.4
Good
8,696 reviews
Southwest
8.0
Very good
4,294 reviews
Check prices

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Frontier
6.0
Okay
3,287 reviews
Southwest
8.0
Very good
4,294 reviews
Check prices

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

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$ 337, 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$ 379 and C$ 420, respectively. You may be able to fly from Buffalo to St. Louis for 31% 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 Delta, which is currently one of the cheapest options available, starting at C$ 174. United Airlines flights start at C$ 229 while deals on Southwest start at C$ 275 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

See prices for flight routes from nearby airports that may be better suited for you.
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 1 May 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapestC$ 409AverageC$ 506FlexibilityNo cancel feeOn-time63%
Search Southwest flights
United AirlinesCheapestC$ 504AverageC$ 672FlexibilityNo 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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