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251 € Cheap Flights from Buffalo Niagara to Key West International

Compare Buffalo Niagara to Key West International flight deals

Find the cheapest month or even day of the year to fly to Key West International

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Flight deals from Buffalo Niagara to Key West International

Looking for a cheap last-minute deal or the best return flight from Buffalo Niagara Airport to Key West International Airport? If you want to travel next month, return fares start from 251 €. Find the lowest prices on one-way and return tickets right here.
Key West.251 € per passenger.Departing Fri, 14 Aug, returning Mon, 17 Aug.Return flight with Frontier Airlines and Allegiant Air.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Fri, 14 Aug, arriving in Key West International.Inbound indirect flight with Allegiant Air, departs from Key West International on Mon, 17 Aug, arriving in Buffalo Niagara.Price includes taxes and charges.From 251 €, select.
Key West.266 € per passenger.Departing Thu, 24 Sep, returning Sun, 27 Sep.Return flight with Frontier Airlines and Allegiant Air.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Thu, 24 Sep, arriving in Key West International.Inbound indirect flight with Allegiant Air, departs from Key West International on Sun, 27 Sep, arriving in Buffalo Niagara.Price includes taxes and charges.From 266 €, select.
Key West.294 € per passenger.Departing Wed, 28 Oct, returning Mon, 2 Nov.Return flight with Delta.Outbound indirect flight with Delta, departs from Buffalo Niagara on Wed, 28 Oct, arriving in Key West International.Inbound indirect flight with Delta, departs from Key West International on Mon, 2 Nov, arriving in Buffalo Niagara.Price includes taxes and charges.From 294 €, select.
Key West.344 € per passenger.Departing Mon, 26 Oct, returning Sat, 31 Oct.Return flight with jetBlue and Allegiant Air.Outbound indirect flight with jetBlue, departs from Buffalo Niagara on Mon, 26 Oct, arriving in Key West International.Inbound indirect flight with Allegiant Air, departs from Key West International on Sat, 31 Oct, arriving in Buffalo Niagara.Price includes taxes and charges.From 344 €, select.
Key West.395 € per passenger.Departing Wed, 3 Mar, returning Mon, 8 Mar.Return flight with Delta.Outbound indirect flight with Delta, departs from Buffalo Niagara on Wed, 3 Mar, arriving in Key West International.Inbound indirect flight with Delta, departs from Key West International on Mon, 8 Mar, arriving in Buffalo Niagara.Price includes taxes and charges.From 395 €, select.
Key West.395 € per passenger.Departing Wed, 26 May, returning Mon, 31 May.Return flight with Delta.Outbound indirect flight with Delta, departs from Buffalo Niagara on Wed, 26 May, arriving in Key West International.Inbound indirect flight with Delta, departs from Key West International on Mon, 31 May, arriving in Buffalo Niagara.Price includes taxes and charges.From 395 €, select.
Key West.508 € per passenger.Departing Thu, 5 Nov, returning Sat, 7 Nov.Return flight with Delta.Outbound indirect flight with Delta, departs from Buffalo Niagara on Thu, 5 Nov, arriving in Key West International.Inbound indirect flight with Delta, departs from Key West International on Sat, 7 Nov, arriving in Buffalo Niagara.Price includes taxes and charges.From 508 €, select.
Key West.550 € per passenger.Departing Tue, 14 Jul, returning Thu, 16 Jul.Return flight with Frontier Airlines and Breeze Airways.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Tue, 14 Jul, arriving in Key West International.Inbound indirect flight with Breeze Airways, departs from Key West International on Thu, 16 Jul, arriving in Buffalo Niagara.Price includes taxes and charges.From 550 €, select.
Key West.613 € per passenger.Departing Thu, 11 Feb, returning Mon, 15 Feb.Return flight with Delta.Outbound indirect flight with Delta, departs from Buffalo Niagara on Thu, 11 Feb, arriving in Key West International.Inbound indirect flight with Delta, departs from Key West International on Mon, 15 Feb, arriving in Buffalo Niagara.Price includes taxes and charges.From 613 €, select.

Find the cheapest month to fly from Buffalo Niagara to Key West International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Buffalo Niagara to Key West International flights are currently cheapest in August.
Jul
from 550 €
Aug
from 251 €
Sep
from 266 €
Oct
from 344 €
Nov
from 508 €
Dec
Find prices
Jan
Find prices
Feb
from 613 €
Mar
from 395 €
Apr
Find prices
May
from 395 €
Jun
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Buffalo Niagara to Key West International: Alternative routes

Compare routes from Buffalo Niagara to Key West below. You may find an airport to fly into that's cheaper, faster, or easier than Key West International.

Key West International

5km from central Key West
ClosestCheapest
from 251 €
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Buffalo to Key West: Flight information

The things to know before you go.
Cheapest flight found251 €
Cheapest month to flyAugust

Finding cheap flights from Buffalo Niagara to Key West International: Frequently asked questions

The best price we found for a return flight from Buffalo Niagara to Key West International is 251 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Buffalo Niagara to Key West International. But we found flights with one or more stops from 251 €.
As of July 2026, there are no flights flying from Buffalo Niagara to Key West International.
The cheapest month to fly from Buffalo Niagara to Key West International is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Buffalo Niagara Airport to Key West International Airport on Friday, 14 August 2026.
No airlines currently offer direct flights between Buffalo Niagara Airport and Key West International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Key West International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Key West is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, Frontier Airlines offers the cheapest flight tickets to Key West International.

Flying from Buffalo Niagara Airport (BUF) to Key West International Airport (EYW): what you need to know

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are tried-and-true travel tips. Be at the airport on time to catch your BUF to EYW flight.

  • During popular months such as August, it's best to get to the airport earlier than normal. Plan to arrive two hours before a domestic departure and four hours ahead of international flights when you fly during peak periods in general.

  • Consider adding a stopover when booking your ticket from Buffalo Niagara Airport to Key West International Airport. Just deselect 'Direct flights only' to break up your trip, or visit a new city along the way. Check out these options between BUF and EYW:

    • Atlanta Hartsfield-Jackson Airport

    • Orlando International Airport

    • Fort Lauderdale International Airport

How to find the cheapest flights from Buffalo Niagara Airport (BUF) to Key West International Airport (EYW)

  • 108 € is the best price for a one-way Buffalo Niagara Airport to Key West International Airport flight. A return flight starts at 251 €. These fares may change depending on availability.

  • To pick up cheap tickets from BUF to EYW, book in advance. Airlines typically offer their best fares when flights are first made available.

  • If you're flexible with your travel plans, use the 'Whole month' search function. It'll show you the lowest price in each month when looking for a flight from Buffalo Niagara Airport to Key West International Airport.

  • Never miss a deal on cheap flights from BUF to EYW by creating a Price Alert. You'll get an email or notification through the app when fares go down.

  • Lock in the perfect flight for you by using the filters. To see the 'Fastest,' 'Best' or 'Cheapest' flights from Buffalo Niagara Airport to Key West International Airport, use the 'Sort by' tool. You can also filter by arrival and departure times, airline, and number of stops.

Handy information about Buffalo Niagara Airport (BUF)

  • The address for BUF is Genesee Street.

  • When it comes to Buffalo Niagara Airport's on-time performance, data shows 74% of flights stick to their scheduled arrival time.

  • Central Buffalo to Buffalo Niagara Airport is approximately 16 kilometres. Depending on traffic, it'll take you about 20 minutes to get there if you're ride-sharing, catching a taxi or driving.

  • Expect a journey time of about 40 minutes on public transport.

  • Searching for a convenient hotel near BUF? If you're boarding an early flight from Buffalo Niagara Airport to Key West International Airport, these accommodation options will have you sleeping moments from your departure gate:

Arriving at Key West International Airport (EYW)

  • If you're landing on a late Buffalo Niagara Airport to Key West International Airport flight, nothing tops the convenience of being near the terminal. Collect your bags from the carousel and then be resting soon after at one of these hotels near EYW:

  • Pick up a Key West International Airport rental car and discover Key West and beyond with your own wheels. Dollar, Alamo and Budget are popular providers you can book with here.

  • For the lowest price, reserve your vehicle from Key West International Airport about two weeks before you set off.

When to fly to Key West International Airport (EYW)

  • The quietest month for a flight from Buffalo Niagara Airport to Key West International Airport is September, while April is the busiest. Pick the ideal time to visit Key West based on whether you prefer a more fast-paced or easygoing experience.

  • The warmest month in Key West is August, with temperatures ranging between 26ºC (79ºF) and 30ºC (86ºF). Lock in your flights from Buffalo Niagara Airport to Key West International Airport in this month if you like this kind of weather.

  • January has average temperatures of between 18ºC (64ºF) and 23ºC (73ºF). Search for cheap tickets from BUF to EYW sometime around then if you want to travel when it's cooler.

Explore more of the United States

  • You've done Key West, now it's time to explore more of the United States. Travel around 209 kilometres north-east to Miami to check off its leading sights. From Beach to Ocean Drive and Port of Miami, you'll have a packed itinerary ahead.

  • Around 386 kilometres north of Key West, Tampa is another favourite stop in the United States. Experience this destination's highlights firsthand at Busch Gardens Tampa, The Florida Aquarium and ZooTampa at Lowry Park.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.