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Cheap flights from Buffalo to St. Louis from C$ 138

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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — STL
13 Mar — 20 Mar1
1 adult

The best prices from Buffalo to Lambert-St Louis are usually found in August or September, booked 86 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 8 March 2025.

Round-trip from

C$ 247

One-way from

C$ 138

Popular in

May

Cheapest in

August

Average price

C$ 525
Frontier
  • Frontier
  • 2/4-24/4
  • 2 total stops
  • 27h 43m total
  • Buffalo to St. Louis
Search Deals
Frontier
  • Frontier
  • 5/4
  • 1 total stop
  • 7h 48m total
  • Buffalo to St. Louis
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 88 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 8 March 2025.

Wed 2/411:24 a.m.BUF - STL
1 stop13h 22mFrontier
Thu 24/45:41 p.m.STL - BUF
1 stop14h 21mFrontier
Deal found 7/3C$ 247
Wed 2/48:50 a.m.BUF - STL
2 stops7h 57mUnited Airlines
Tue 8/43:40 p.m.STL - BUF
2 stops7h 04mUnited Airlines
Deal found 6/3C$ 411
Fri 18/46:45 p.m.BUF - STL
1 stop5h 51mDelta
Mon 21/46:59 p.m.STL - BUF
1 stop14h 07mDelta
Deal found 6/3C$ 459
Tue 1/46:10 a.m.BUF - STL
2 stops8h 25mSouthwest
Thu 3/45:50 a.m.STL - BUF
1 stop5h 50mSouthwest
Deal found 7/3C$ 462

Find flights from Buffalo to St. Louis within your budget

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 8 March 2025.

Fly from

Buffalo

Fly to

St. Louis

Route

Depart

Return

Price

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 2/4

11:24 a.m.-11:46 p.m.

1 stop13h 22m

Lambert-St Louis

Thu 24/4

5:41 p.m.-9:02 a.m.

1 stop14h 21m

C$ 247

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 2/4

8:50 a.m.-3:47 p.m.

2 stops7h 57m

Lambert-St Louis

Tue 8/4

3:40 p.m.-11:44 p.m.

2 stops7h 04m

C$ 411

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 18/4

6:45 p.m.-11:36 p.m.

1 stop5h 51m

Lambert-St Louis

Mon 21/4

6:59 p.m.-10:06 a.m.

1 stop14h 07m

C$ 459

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 1/4

6:10 a.m.-1:35 p.m.

2 stops8h 25m

Lambert-St Louis

Thu 3/4

5:50 a.m.-12:40 p.m.

1 stop5h 50m

C$ 462

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 5/4

4:58 p.m.-11:46 p.m.

1 stop7h 48m

C$ 138

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 7/5

5:20 a.m.-3:11 p.m.

1 stop10h 51m

C$ 198

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 1/4

6:10 a.m.-1:35 p.m.

2 stops8h 25m

C$ 206

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 5/4

10:20 a.m.-9:48 p.m.

2 stops12h 28m

C$ 321

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

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.

Travel insights for flights from Buffalo to St. Louis

Get recent, data-driven insights about flights from Buffalo to St. Louis including ideal travel times, pricing trends, and more.

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 28 February 2025.

The best time to book flights from Buffalo to St. Louis is 85 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 8 March 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 8 March 2025.
Southwest
8.1
Very good
4,314 reviews
Check prices

Boarding

8.2

Overall

8.1

Food

7.1

Crew

8.7

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Southwest
8.1
Very good
4,314 reviews
Southwest
8.1
Very good
4,314 reviews
Check prices

Boarding

8.2

Overall

8.1

Food

7.1

Crew

8.7

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Delta
8.0
Very good
8,024 reviews
Southwest
8.1
Very good
4,314 reviews
Check prices

Boarding

8.2

Overall

8.1

Food

7.1

Crew

8.7

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

United Airlines
7.4
Good
8,649 reviews
Southwest
8.1
Very good
4,314 reviews
Check prices

Boarding

8.2

Overall

8.1

Food

7.1

Crew

8.7

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,314 reviews
Check prices

Boarding

8.2

Overall

8.1

Food

7.1

Crew

8.7

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Frontier
6.0
Okay
3,314 reviews
Southwest
8.1
Very good
4,314 reviews
Check prices

Boarding

8.2

Overall

8.1

Food

7.1

Crew

8.7

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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$ 247, Frontier will fly you from Buffalo to St. Louis and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Delta - these airlines can fly you to your destination from C$ 411 and C$ 459, respectively. You may be able to fly from Buffalo to St. Louis for 51% 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$ 138. American Airlines flights start at C$ 198 while deals on Southwest start at C$ 206 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
St. Peters
Chesterfield

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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 8 March 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapestC$ 424AverageC$ 553FlexibilityNo cancel feeOn-time63%
Search Southwest flights
United AirlinesCheapestC$ 523AverageC$ 697FlexibilityNo 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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