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Cheap flights from Buffalo to Key Largo from C$ 89

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 25/4. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — MIA
22 Apr — 29 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Buffalo to Key Largo

Enter your travel dates to find the best prices.

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 23 March 2026.

Sat 25/41:11 p.m.
BUF
-
MIA
1 stop11h 38m
Frontier
Fri 1/55:05 a.m.
MIA
-
BUF
1 stop6h 18m
Frontier
Deal found 20/3C$ 261
Sun 12/47:33 p.m.
BUF
-
MIA
1 stop16h 05m
Frontier
Fri 17/45:05 a.m.
MIA
-
BUF
1 stop6h 08m
Frontier
Deal found 22/3C$ 262
Mon 13/43:00 p.m.
BUF
-
MIA
2 stops20h 41m
Frontier
Fri 17/45:05 a.m.
MIA
-
BUF
1 stop6h 08m
Frontier
Deal found 21/3C$ 270
Mon 13/43:00 p.m.
BUF
-
MIA
2 stops9h 49m
Multiple Airlines
Tue 14/43:12 p.m.
MIA
-
BUF
1 stop21h 40m
Multiple Airlines
Deal found 21/3C$ 273
Thu 9/41:02 p.m.
BUF
-
MIA
1 stop11h 47m
Frontier
Sat 18/45:05 a.m.
MIA
-
BUF
1 stop7h 08m
Frontier
Deal found 21/3C$ 276
Sat 11/41:09 p.m.
BUF
-
MIA
1 stop11h 40m
Frontier
Wed 15/47:04 p.m.
MIA
-
BUF
1 stop16h 36m
Frontier
Deal found 21/3C$ 277
Sat 11/48:52 p.m.
BUF
-
MIA
2 stops13h 30m
Frontier
Sat 18/45:05 a.m.
MIA
-
BUF
1 stop7h 08m
Frontier
Deal found 21/3C$ 280
Sat 11/48:52 p.m.
BUF
-
MIA
2 stops13h 30m
Frontier
Fri 17/45:05 a.m.
MIA
-
BUF
1 stop6h 08m
Frontier
Deal found 21/3C$ 281
Sat 11/48:52 p.m.
BUF
-
MIA
2 stops13h 30m
Multiple Airlines
Tue 14/43:12 p.m.
MIA
-
BUF
1 stop21h 40m
Multiple Airlines
Deal found 21/3C$ 283
Mon 11/52:49 p.m.
BUF
-
MIA
1 stop7h 58m
Multiple Airlines
Sat 16/54:59 p.m.
MIA
-
BUF
1 stop17h 42m
Multiple Airlines
Deal found 19/3C$ 285
Sat 25/41:11 p.m.
BUF
-
MIA
1 stop11h 38m
Frontier
Thu 30/45:05 a.m.
MIA
-
BUF
1 stop7h 07m
Frontier
Deal found 23/3C$ 288
Wed 22/41:56 p.m.
BUF
-
MIA
1 stop10h 53m
Frontier
Sat 2/55:05 a.m.
MIA
-
BUF
1 stop7h 08m
Frontier
Deal found 21/3C$ 290

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 23 March 2026.

Round-trip from

C$ 261

One-way from

C$ 89

Popular in

March

Cheapest in

September

Average price

C$ 516
Frontier
  • Frontier
  • 25/4-1/5
  • 2 total stops
  • 17h 56m total
  • Buffalo to Key Largo
Search Deals
Frontier
  • Frontier
  • 25/4
  • 1 total stop
  • 11h 38m total
  • Buffalo to Key Largo
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (C$ 103 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 629,999 searches. Data last updated 23 March 2026.
Use the filters below to find and compare flights from Buffalo to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Fri 8/5

7:39 p.m.-12:47 a.m.

1 stop5h 08m

Miami

Mon 11/5

6:00 a.m.-11:13 a.m.

1 stop5h 13m

C$ 325

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Fri 1/5

4:00 p.m.-11:00 p.m.

1 stop7h 00m

Miami

Sat 9/5

7:00 a.m.-6:00 p.m.

1 stop11h 00m

C$ 332

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Sun 26/7

6:00 a.m.-11:39 p.m.

1 stop17h 39m

Miami

Mon 3/8

6:00 a.m.-11:11 a.m.

1 stop5h 11m

C$ 346

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Thu 9/4

10:23 a.m.-6:51 p.m.

1 stop8h 28m

Miami

Wed 15/4

7:40 a.m.-2:52 p.m.

1 stop7h 12m

C$ 368

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Fri 8/5

12:40 p.m.-10:00 p.m.

2 stops9h 20m

Miami

Sun 10/5

6:30 a.m.-2:15 p.m.

1 stop7h 45m

C$ 387

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Thu 27/8

7:40 p.m.-12:54 a.m.

1 stop5h 14m

Miami

Fri 4/9

8:05 a.m.-3:11 p.m.

1 stop7h 06m

C$ 395

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Sat 16/5

5:11 p.m.-12:43 a.m.

1 stop7h 32m

Miami

Sat 23/5

9:00 a.m.-9:18 a.m.

1 stop24h 18m

C$ 412

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Mon 11/5

5:45 a.m.-3:20 p.m.

2 stops9h 35m

Miami

Sat 16/5

8:25 a.m.-6:00 p.m.

2 stops9h 35m

C$ 462

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Fri 8/5

12:40 p.m.-10:00 p.m.

2 stops9h 20m

Miami

Mon 11/5

11:40 a.m.-9:30 p.m.

2 stops9h 50m

C$ 491

BuffaloMiami

BUF - MIA

BUFMIA

Buffalo

Wed 15/4

10:30 a.m.-10:45 p.m.

2 stops12h 15m

Miami

Thu 16/4

12:24 p.m.-11:50 p.m.

2 stops11h 26m

C$ 517

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/3

Showing 1-10 of 20 resultsSorted by cheapest first
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 13 March 2026.

The best time to book flights from Buffalo to Key Largo is 90 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, March is the cheapest month in which you can book a flight from Buffalo to Key Largo (average of C$ 121). Flying from Buffalo to Key Largo in December is currently the most expensive (average of C$ 218). 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 23 March 2026.

It’s optimal to fly from Buffalo to Key Largo in the evening. By choosing this option you can save up to 60% on the cost of your flight, compared to a flight in the afternoon.

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 23 March 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Buffalo to Key Largo have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,331 reviews
Check prices

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,331 reviews
Southwest
8.0
Very good
4,331 reviews
Check prices

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,320 reviews
Southwest
8.0
Very good
4,331 reviews
Check prices

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,469 reviews
Southwest
8.0
Very good
4,331 reviews
Check prices

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,492 reviews
Southwest
8.0
Very good
4,331 reviews
Check prices

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.7
Fair
3,018 reviews
Southwest
8.0
Very good
4,331 reviews
Check prices

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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?

    Buffalo (BUF) is the airport you will fly out of if you book a flight from Buffalo to Key Largo. You should not have trouble finding flights to Key Largo from Buffalo; the airport handles an average of 0 outbound flights to Key Largo per day. You should also have plenty of airline options to choose from since 6 airlines have flights from the Buffalo airport to Key Largo. It is only a 13.4 km journey to Buffalo (BUF) from Buffalo’s city centre.

  • How popular is this Buffalo to Key Largo flight route?

    The Buffalo to Key Largo flight path was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Airlines like Delta and Southwest fly from Buffalo to Key Largo in about 5h 08m. The time it takes to get you to your destination can typically vary by up to 1h 52m. The distance between Buffalo and Key Largo is about 1910 km. Both multi-stop and direct flights can be found to your destination and back.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as C$ 99. Users have also found prices from C$ 105 and C$ 114 on Southwest and American Airlines, respectively.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Buffalo to Key Largo on time: Qatar Airways (83%), American Airlines (78%), Republic Airways (78%).

  • 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, March is the cheapest month in which you can book a flight from Buffalo to Key Largo (average of C$ 121). Flying from Buffalo to Key Largo in December is currently the most expensive (average of C$ 218). 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

Browse thousands of different options on Cheapflights for your next trip

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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 629,999 searches. Data last updated 23 March 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 115AverageC$ 405FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FrontierCheapestC$ 133AverageC$ 262FlexibilityNo cancel feeOn-time62%
Search Frontier flights
DeltaCheapestC$ 148AverageC$ 324FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 183AverageC$ 570FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
JetBlueCheapestC$ 187AverageC$ 350FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
SouthwestCheapestC$ 217AverageC$ 372FlexibilityNo cancel feeOn-time63%
Search Southwest flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Buffalo to Key Largo?

Cheapflights helps you search for flights from Buffalo to Key Largo via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Buffalo to Key Largo?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Key Largo from Buffalo.

Can Cheapflights find flights from Buffalo to Key Largo with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Buffalo to Key Largo, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Buffalo to Key Largo become cheaper?

Yes, Cheapflights offers price alerts on Buffalo to Key Largo flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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