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Key Largo

$84+ Cheap flights from Buffalo (BUF) to Key Largo, FL

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 2/19. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — MIA
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheapflights Tip: The best prices from Buffalo to Key Largo are usually found in September or October, booked 31 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Buffalo to Key Largo

Cheapest flights from Buffalo to Key Largo
Explore the most affordable flight options available from Buffalo to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Southwest deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2212:25 pmBUF - MIA
1 stop11h 40mSouthwest
Wed 12/246:55 amMIA - BUF
1 stop4h 35mSouthwest
Deal found 12/16$203
This Delta deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/216:54 pmBUF - MIA
1 stop5h 54mDelta
Tue 12/305:19 pmMIA - BUF
1 stop6h 09mDelta
Deal found 12/17$217
This Expedia deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/207:05 pmBUF - MIA
1 stop5h 42mFrontier
Wed 12/245:30 amMIA - BUF
1 stop11h 19mFrontier
Deal found 12/17$233
This Southwest deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:30 amBUF - MIA
1 stop5h 25mSouthwest
Thu 12/251:05 pmMIA - BUF
1 stop7h 35mSouthwest
Deal found 12/16$238
This Delta deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:54 pmBUF - MIA
1 stop5h 54mDelta
Wed 12/314:01 pmMIA - BUF
1 stop7h 36mDelta
Deal found 12/17$248
This American Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:35 pmBUF - MIA
1 stop5h 17mAmerican Airlines
Tue 1/205:36 pmMIA - BUF
1 stop6h 05mAmerican Airlines
Deal found 12/16$252
This Frontier deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/225:40 pmBUF - MIA
1 stop7h 11mFrontier
Mon 12/295:30 amMIA - BUF
1 stop11h 15mFrontier
Deal found 12/17$255
This Delta deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/216:54 pmBUF - MIA
1 stop5h 54mDelta
Mon 12/295:01 pmMIA - BUF
1 stop6h 46mDelta
Deal found 12/17$257
This Delta deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/206:54 pmBUF - MIA
1 stop5h 52mDelta
Wed 12/245:45 pmMIA - BUF
1 stop5h 52mDelta
Deal found 12/17$258

Find flight deals from Buffalo to Key Largo

Keep the following information in mind while searching for Buffalo to Key Largo flight deals. Data was last updated December 18, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$193
(Kiwi.com)

One-way from

$84
(Southwest)

Popular in

December

Cheapest in

September

Average price

$382
Provider with most accurate pricing for Buffalo-Miami flight deals.
Search Deals
Provider most trusted by Cheapflights users for Buffalo-Miami flights.
Search Deals
From Buffalo to Key Largo
Search Deals
One-way flight from Buffalo to Key Largo
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Buffalo to Key Largo 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 2,558,603 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Buffalo to Key Largo that are best for you.

Fly from

Buffalo

Fly to

Key Largo

Route

Depart

Return

Price

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Tue 1/6

8:45 am-4:10 pm

1 stop7h 25m

Miami

Mon 1/12

7:15 am-12:30 pm

1 stop5h 15m

$199

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Thu 2/19

1:39 pm-12:42 am

1 stop11h 03m

Miami

Sat 2/28

7:05 am-9:52 am

2 stops26h 47m

$206

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Mon 12/22

12:25 pm-12:05 am

1 stop11h 40m

Miami

Wed 12/24

6:55 am-2:20 pm

2 stops7h 25m

$209

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Fri 1/23

4:01 pm-10:51 pm

1 stop6h 50m

Miami

Sat 1/24

7:07 am-12:08 pm

1 stop5h 01m

$217

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Sun 1/11

1:15 pm-11:56 am

1 stop22h 41m

Miami

Sun 1/18

7:00 am-10:49 am

1 stop27h 49m

$223

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Wed 2/18

5:05 pm-10:00 pm

1 stop4h 55m

Miami

Wed 2/25

6:55 am-4:15 pm

2 stops9h 20m

$237

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Tue 12/23

5:30 am-10:55 am

1 stop5h 25m

Miami

Thu 12/25

1:05 pm-8:40 pm

1 stop7h 35m

$238

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Mon 1/12

6:00 am-12:14 pm

1 stop6h 14m

Miami

Thu 1/15

7:00 am-2:10 pm

1 stop7h 10m

$247

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Sun 3/15

12:40 pm-6:15 pm

1 stop5h 35m

Miami

Fri 3/20

6:40 am-3:15 pm

1 stop8h 35m

$248

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Sat 12/20

6:54 pm-12:46 am

1 stop5h 52m

Miami

Tue 12/30

5:19 pm-11:28 pm

1 stop6h 09m

$258

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 21 results
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Best time to book a flight from Buffalo to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo 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 Key Largo

How far ahead should I book a flight from Buffalo to Key Largo?

Use this chart to determine the optimal time to book a round-trip flight from Buffalo to Key Largo. Price data was last updated on December 12, 2025.

The best time to book flights from Buffalo to Key Largo is 31 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 Key Largo?

Currently, January is the cheapest month in which you can book a flight from Buffalo to Key Largo (average of $71). Flying from Buffalo to Key Largo in December is currently the most expensive (average of $159). 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 KE9?

Find hourly flight availability from Buffalo to Key Largo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

It’s typically best to fly out from Buffalo to Key Largo at noon. Doing so could potentially save you 41% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Buffalo to Key Largo?

Use this chart to determine the cheapest time to fly round-trip from Buffalo to Key Largo. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Buffalo to Key Largo flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Key Largo

Get insights into the airlines that provide service to Key Largo. 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 Key Largo. Reviews last updated December 18, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Buffalo to Key Largo by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Food

7.0

Overall

7.9

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
7.9
Good
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Food

7.0

Overall

7.9

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,005 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Food

7.0

Overall

7.9

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,091 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Food

7.0

Overall

7.9

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,054 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Food

7.0

Overall

7.9

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
JetBlue
7.2
Good
2,897 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Food

7.0

Overall

7.9

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Buffalo to Key Largo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Buffalo to Key Largo?

    For a flight from Buffalo to Key Largo, you will be flying from Buffalo. Buffalo (BUF) is just 8.3 mi from the center of the city. Buffalo is the only Buffalo airport and it handles 0 outbound flights to Key Largo per day. 6 airlines have flights to Key Largo from Buffalo on a regular basis.

  • How long is the flight from Buffalo to Key Largo?

    There are many flights that can get you from Buffalo to Key Largo in 6h 50m. Fly via Southwest or American Airlines to get the fastest option. Airlines will cover a distance of 1187 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Buffalo to Key Largo one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $59. Southwest flights start at $79 while deals on American Airlines start at $83 one-way.

  • What are the most reliable airlines from Buffalo to Key Largo?

    The top 3 most reliable airlines when flying from Buffalo to Key Largo are Delta (100%), Republic Airways (83%) and Qatar Airways (63%).

  • What are the cheapest flights from Buffalo to Key Largo?

    Looking at all options, your cheapest flight can be booked for $108. While the most popular route (Buffalo - Miami) can be booked for $166 on average, our data indicates $445 when flying from Buffalo to Key Largo.

  • Can I find deals for flights from Buffalo to Key Largo that include hotel bookings?

    Yes. In addition to deals on Buffalo to Key Largo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Buffalo to Key Largo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Buffalo to Key Largo.

  • Can I find deals for business class flights from Buffalo to Key Largo?

    Yes. Cheapflights offers flight deals from Buffalo to Key Largo 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 Key Largo?

    Currently, January is the cheapest month in which you can book a flight from Buffalo to Key Largo (average of $71). Flying from Buffalo to Key Largo in December is currently the most expensive (average of $159). 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

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Top 6 airlines flying from Buffalo to Key Largo

Discover the top 6 airlines that operate flights from Buffalo to Key Largo. 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 2,558,603 searches. Data last updated December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$228FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$146Average$305FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$156Average$302FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$158Average$356FlexibilityNo cancel feeOn-time71%
DeltaCheapest$189Average$330FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$192Average$397FlexibilityNo cancel feeOn-time69%

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