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Cheap flights from Buffalo to St. Louis from C$ 161

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
21 May — 28 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 16 May 2025.

Round-trip from

C$ 450

One-way from

C$ 161

Popular in

May

Cheapest in

August

Average price

C$ 546
United Airlines
  • United Airlines
  • 30/5-3/6
  • 2 total stops
  • 10h 46m total
  • Buffalo to St. Louis
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Frontier
  • Frontier
  • 14/8
  • 1 total stop
  • 27h 40m total
  • Buffalo to St. Louis
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 43 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 9 potential savings vs. average RT price).
Search Deals
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 16 May 2025.

Sat 24/56:00 a.m.BUF - STL
1 stop5h 18mUnited Airlines
Sat 31/55:00 a.m.STL - BUF
2 stops8h 09mUnited Airlines
Deal found 14/5C$ 338
Sun 1/67:30 p.m.BUF - STL
1 stop5h 35mSouthwest
Mon 9/66:15 p.m.STL - BUF
1 stop5h 10mSouthwest
Deal found 15/5C$ 460
Mon 19/56:35 p.m.BUF - STL
1 stop6h 03mDelta
Thu 22/56:00 a.m.STL - BUF
1 stop7h 19mDelta
Deal found 15/5C$ 844

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 16 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 30/5

7:00 a.m.-12:20 p.m.

1 stop6h 20m

Lambert-St Louis

Tue 3/6

3:35 p.m.-9:01 p.m.

1 stop4h 26m

C$ 450

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sun 1/6

7:30 p.m.-12:05 a.m.

1 stop5h 35m

Lambert-St Louis

Mon 9/6

6:15 p.m.-12:25 a.m.

1 stop5h 10m

C$ 460

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 14/8

9:07 p.m.-11:47 p.m.

1 stop27h 40m

C$ 161

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 9/6

7:53 p.m.-11:59 p.m.

1 stop5h 06m

C$ 176

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 10/6

2:05 p.m.-9:00 p.m.

2 stops7h 55m

C$ 180

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 18/6

6:00 a.m.-3:30 p.m.

2 stops10h 30m

C$ 229

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/5

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 May 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 16 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 16 May 2025.
Southwest
8.0
Very good
4,291 reviews
Check prices

Food

7.1

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Crew

8.6

Overall

8.0

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
4,291 reviews
Southwest
8.0
Very good
4,291 reviews
Check prices

Food

7.1

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Crew

8.6

Overall

8.0

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
8,731 reviews
Southwest
8.0
Very good
4,291 reviews
Check prices

Food

7.1

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Crew

8.6

Overall

8.0

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!
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,291 reviews
Check prices

Food

7.1

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Crew

8.6

Overall

8.0

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
3,285 reviews
Southwest
8.0
Very good
4,291 reviews
Check prices

Food

7.1

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Crew

8.6

Overall

8.0

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$ 450, United Airlines will fly you from Buffalo to St. Louis and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Southwest for as low as C$ 460. You may be able to fly from Buffalo to St. Louis for 8% 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 Frontier, which is currently one of the cheapest options available, starting at C$ 161. American Airlines flights start at C$ 176 while deals on Southwest start at C$ 180 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 16 May 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapestC$ 414AverageC$ 526FlexibilityNo cancel feeOn-time63%
Search Southwest flights
United AirlinesCheapestC$ 510AverageC$ 659FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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How does Cheapflights help users find flights from Buffalo to St. Louis?

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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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