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Key Largo

$78+ 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 11/7. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — MIA
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheapflights Tip: The best prices from Buffalo to Key Largo are usually found in September or July, booked 85 days in advance, depart on a Wednesday or Thursday and return on a Tuesday

Cheap 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 August 18, 2025.

Round-trip from

$160
(FlightHub)

One-way from

$78
(Priceline)

Popular in

December

Cheapest in

September

Average price

$263
From Buffalo to Key Largo
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One-way flight from Buffalo to Key Largo
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Highest demand for flights based on searches. 10% potential increase in price ($37 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 August 18, 2025.

This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/186:52 pmBUF - MIA
1 stop21h 11mFrontier
Sat 10/255:47 pmMIA - BUF
1 stop17h 32mFrontier
Deal found 8/17$160
This Justfly.com deal was found by Cheapflights users on 8/17. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:22 pmBUF - MIA
1 stop27h 16mFrontier
Sun 9/145:30 amMIA - BUF
1 stop5h 52mFrontier
Deal found 8/17$162
This Expedia deal was found by Cheapflights users on 8/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/412:17 pmBUF - MIA
1 stop11h 55mFrontier
Thu 9/115:30 amMIA - BUF
1 stop5h 52mFrontier
Deal found 8/16$163
This FlightHub deal was found by Cheapflights users on 8/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1212:17 pmBUF - MIA
1 stop11h 55mFrontier
Mon 9/155:30 amMIA - BUF
1 stop5h 52mFrontier
Deal found 8/16$165
This Southwest deal was found by Cheapflights users on 8/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/158:30 amBUF - MIA
1 stop7h 50mSouthwest
Mon 9/227:10 amMIA - BUF
1 stop4h 30mSouthwest
Deal found 8/17$166
This American Airlines deal was found by Cheapflights users on 8/16. 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.
Thu 9/185:33 pmBUF - MIA
1 stop5h 22mAmerican Airlines
Thu 9/257:37 pmMIA - BUF
1 stop4h 35mAmerican Airlines
Deal found 8/16$167
This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/72:42 pmBUF - MIA
1 stop9h 52mFrontier
Sun 11/165:05 amMIA - BUF
1 stop8h 42mFrontier
Deal found 8/17$171
This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/212:17 pmBUF - MIA
1 stop11h 55mFrontier
Mon 10/66:00 amMIA - BUF
1 stop10h 03mFrontier
Deal found 8/17$174
This Southwest deal was found by Cheapflights users on 8/16. 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.
Fri 9/2612:35 pmBUF - MIA
1 stop5h 35mSouthwest
Mon 9/295:25 pmMIA - BUF
1 stop5h 45mSouthwest
Deal found 8/16$176
This Southwest deal was found by Cheapflights users on 8/16. 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 9/2312:00 pmBUF - MIA
2 stops8h 40mSouthwest
Fri 10/107:05 amMIA - BUF
1 stop4h 35mSouthwest
Deal found 8/16$178

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 August 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

Sat 10/18

6:52 pm-4:03 pm

1 stop21h 11m

Miami

Sat 10/25

5:47 pm-11:19 am

1 stop17h 32m

$160

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Thu 9/11

6:22 pm-9:38 pm

1 stop27h 16m

Miami

Sun 9/14

5:30 am-11:22 am

1 stop5h 52m

$160

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Sat 10/18

6:52 pm-4:03 pm

1 stop21h 11m

Miami

Sun 10/26

5:15 am-11:19 am

1 stop6h 04m

$160

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Thu 9/11

6:22 pm-9:38 pm

1 stop27h 16m

Miami

Mon 9/15

5:30 am-11:22 am

1 stop5h 52m

$162

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Sat 10/25

12:42 pm-11:23 pm

1 stop10h 41m

Miami

Thu 11/6

5:05 am-3:34 pm

1 stop10h 29m

$163

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Thu 9/4

12:17 pm-12:12 am

1 stop11h 55m

Miami

Thu 9/11

5:30 am-11:22 am

1 stop5h 52m

$163

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Mon 9/15

12:17 pm-12:12 am

1 stop11h 55m

Miami

Mon 9/22

5:30 am-11:22 am

1 stop5h 52m

$163

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Fri 9/19

12:17 pm-4:30 pm

1 stop28h 13m

Miami

Mon 9/22

5:30 am-11:22 am

1 stop5h 52m

$165

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Fri 9/12

12:17 pm-12:12 am

1 stop11h 55m

Miami

Mon 9/15

5:30 am-11:22 am

1 stop5h 52m

$165

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Fri 11/7

2:42 pm-12:34 am

1 stop9h 52m

$78

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 16 results
1
2

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 August 8, 2025.

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

Currently, September is the cheapest month in which you can book a flight from Buffalo to Key Largo (average of $232). Flying from Buffalo to Key Largo in March is currently the most expensive (average of $289). 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 August 18, 2025.

When flying from Buffalo to Key Largo, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 Monday at noon when fares are most often at their lowest. Tuesday mornings 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 August 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
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,925 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
JetBlue
7.2
Good
2,915 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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.

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

    Looking at all options, your cheapest flight can be booked for $174. While the most popular route (Buffalo - Miami) can be booked for $163 on average our data indicates $391 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, September is the cheapest month in which you can book a flight from Buffalo to Key Largo (average of $232). Flying from Buffalo to Key Largo in March is currently the most expensive (average of $289). 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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$108Average$240FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$145Average$287FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$156Average$341FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$158Average$357FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$191Average$413FlexibilityNo cancel feeOn-time69%
DeltaCheapest$216Average$327FlexibilityNo cancel feeOn-timeN/A

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