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Cheap flights from London Heathrow Airport to Florida Keys from £312

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 15/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — EYW
27 Dec — 3 Jan1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Heathrow to Florida Keys

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Florida Keys
Explore the most affordable flight options available from Heathrow to Florida Keys. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 November 2025.

Wed 3/1217:00LHR - MIA
2 stops28h 05mFinnair
Wed 7/121:45MIA - LHR
2 stops19h 25mFinnair
Deal found 25/11£451
Tue 2/1211:45LHR - MIA
1 stop14h 10mBritish Airways
Tue 9/1222:05MIA - LHR
Nonstop9h 00mBritish Airways
Deal found 25/11£451
Mon 8/1217:00LHR - MIA
1 stop32h 31mIberia
Wed 24/1222:25MIA - LHR
Nonstop8h 40mIberia
Deal found 26/11£453
Wed 3/1211:45LHR - MIA
1 stop14h 11mFinnair
Mon 15/1222:05MIA - LHR
Nonstop9h 00mFinnair
Deal found 26/11£454
Wed 3/1206:30LHR - MIA
1 stop15h 40mBritish Airways
Sat 6/1218:41MIA - LHR
1 stop32h 09mBritish Airways
Deal found 25/11£455
Mon 8/1211:15LHR - MIA
Nonstop9h 50mMultiple Airlines
Wed 24/1222:25MIA - LHR
Nonstop8h 40mMultiple Airlines
Deal found 26/11£455
Fri 5/1207:50LHR - MIA
1 stop14h 20mBritish Airways
Tue 9/1214:05MIA - LHR
1 stop11h 55mBritish Airways
Deal found 25/11£458
Tue 9/1211:15LHR - MIA
Nonstop9h 50mBritish Airways
Wed 4/322:00MIA - LHR
Nonstop8h 30mBritish Airways
Deal found 26/11£458
Mon 29/1212:40LHR - MIA
1 stop14h 35mFinnair
Mon 19/122:00MIA - LHR
Nonstop8h 30mFinnair
Deal found 25/11£459
Wed 10/1217:05LHR - MIA
1 stop26h 45mVirgin Atlantic
Thu 25/1217:57MIA - LHR
1 stop11h 18mVirgin Atlantic
Deal found 25/11£460
Thu 27/1109:20LHR - EYW
1 stop31h 33mIcelandair
Thu 4/1212:47EYW - LHR
1 stop13h 08mIcelandair
Deal found 26/11£753
Thu 27/1106:30LHR - EYW
2 stops18h 23mDelta
Thu 4/1212:38EYW - LHR
2 stops15h 07mDelta
Deal found 26/11£794

Cheap flight deals from Heathrow to Florida Keys

Keep the following information in mind while searching for Heathrow to Florida Keys flight deals. Data was last updated 27 November 2025.

Round-trip from

£451

One-way from

£312

Popular in

December

Cheapest in

September

Average price

£462
Scandinavian Airlines
  • Scandinavian Airlines
  • 8/2-12/2
  • 3 total stops
  • 30h 50m total
  • London to Florida Keys
Search Deals
British Airways
  • British Airways
  • 15/4
  • 2 total stops
  • 33h 23m total
  • London to Florida Keys
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£17 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Florida Keys 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 858,174 searches. Data last updated 27 November 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Florida Keys that are best for you.

Fly from

Heathrow

Fly to

Florida Keys

Route

Depart

Return

Price

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Wed 25/3

06:30-19:00

1 stop16h 30m

Miami

Fri 3/4

13:58-06:20

1 stop11h 22m

£458

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Wed 28/1

09:00-17:30

1 stop13h 30m

Miami

Tue 3/2

19:50-16:20

1 stop15h 30m

£461

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 26/1

14:30-19:30

Nonstop10h 00m

Miami

Tue 3/2

22:00-11:30

Nonstop8h 30m

£462

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 20/4

14:40-22:45

1 stop13h 05m

Miami

Tue 28/4

18:29-10:20

1 stop10h 51m

£463

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 27/4

13:20-20:41

1 stop12h 21m

Miami

Sun 3/5

21:16-21:40

1 stop19h 24m

£463

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sat 7/2

11:25-20:45

1 stop14h 20m

Miami

Mon 23/2

15:28-07:20

1 stop10h 52m

£463

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 28/4

13:20-20:41

1 stop12h 21m

Miami

Tue 5/5

18:29-10:20

1 stop10h 51m

£463

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 15/1

14:45-20:10

Nonstop10h 25m

Miami

Thu 22/1

22:10-11:55

Nonstop8h 45m

£465

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 11/12

11:25-20:45

1 stop14h 20m

Miami

Thu 8/1

16:44-09:20

1 stop11h 36m

£469

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sun 11/1

10:20-16:50

1 stop35h 30m

Miami

Tue 20/1

16:29-09:40

1 stop12h 11m

£470

Flights are sorted by cheapest return flights first.

Deals found on 26/11

Showing 1-10 of 31 results
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Best time to book a flight from Heathrow to Florida Keys

Have a flexible travel schedule? Discover the best time to fly to Florida Keys from Heathrow with our price prediction graph.
Estimated return 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 London Heathrow Airport to Florida Keys

What is the cheapest month to book a flight from London Heathrow Airport to Florida Keys?

Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Florida Keys (average of £446). Flying from London Heathrow Airport to Florida Keys in July is currently the most expensive (average of £638). 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.

Reviews of airlines servicing Florida Keys

Get insights into the airlines that provide service to Florida Keys. 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 Florida Keys. Reviews last updated 27 November 2025.
Read reviews from past customers who have flown with KLM, Finnair, andVirgin Atlantic from London Heathrow Airport to Florida Keys. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,423 reviews
Check prices

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,423 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Finnair
7.6
Good
1,334 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Virgin Atlantic
7.5
Good
675 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
TAP AIR PORTUGAL
7.1
Good
2,075 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
British Airways
6.7
Okay
7,539 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Related info for your journey

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

  • How long is the flight from London Heathrow Airport to Florida Keys?

    There are many flights that can get you from London Heathrow Airport to Florida Keys in 13h 30m. Fly via British Airways, United Airlines, or Virgin Atlantic to get the fastest option. The distance between London Heathrow Airport and Florida Keys is about 4414 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from London Heathrow Airport to Florida Keys one-way?

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at £312. Royal Air Maroc flights start at £367 while deals on Finnair start at £367 one-way.

  • Can I find deals for flights from Heathrow to Florida Keys that include hotel bookings?

    Yes. In addition to deals on Heathrow to Florida Keys flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Florida Keys?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Florida Keys.

  • Can I find deals for business class flights from Heathrow to Florida Keys?

    Yes. Cheapflights offers flight deals from Heathrow to Florida Keys 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 London Heathrow Airport to Florida Keys?

    Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Florida Keys (average of £446). Flying from London Heathrow Airport to Florida Keys in July is currently the most expensive (average of £638). 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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Alternative routes for Heathrow to Florida Keys

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Heathrow to Florida Keys

Discover the top 3 airlines that operate flights from Heathrow to Florida Keys. 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 858,174 searches. Data last updated 27 November 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£458Average£551FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£500Average£840FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
American AirlinesCheapest£525Average£565FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Heathrow to Florida Keys?

When you search for this flight from Heathrow to Florida Keys, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Florida Keys?

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Florida Keys for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Heathrow to Florida Keys with no change fees?

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

Can Cheapflights notify me if prices for flights from Heathrow to Florida Keys become cheaper?

Not ready to book yet? You can track prices for flights from Heathrow to Florida Keys on Cheapflights with our Price Alert feature and get notified when better prices are available.

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