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Cheap flights from London Heathrow Airport to Florida Keys from £345

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 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — EYW
25 Dec — 1 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 25 November 2025.

Fri 5/1220:35LHR - MIA
1 stop29h 20mIcelandair
Wed 10/1217:15MIA - LHR
1 stop12h 35mIcelandair
Deal found 23/11£445
Thu 4/1212:15LHR - MIA
1 stop13h 40mIcelandair
Sun 14/1217:15MIA - LHR
1 stop12h 35mIcelandair
Deal found 23/11£446
Thu 4/1212:15LHR - MIA
1 stop13h 40mIcelandair
Sun 7/1217:15MIA - LHR
1 stop12h 35mIcelandair
Deal found 24/11£449
Wed 3/1220:35LHR - MIA
1 stop29h 20mIcelandair
Sun 7/1217:15MIA - LHR
1 stop21h 15mIcelandair
Deal found 24/11£450
Mon 29/1213:00LHR - MIA
1 stop15h 06mVirgin Atlantic
Thu 15/122:40MIA - LHR
1 stop14h 40mVirgin Atlantic
Deal found 23/11£450
Wed 3/1214:30LHR - MIA
Nonstop10h 00mBritish Airways
Thu 11/1222:05MIA - LHR
Nonstop9h 00mBritish Airways
Deal found 24/11£454
Wed 31/1214:00LHR - MIA
Nonstop10h 25mVirgin Atlantic
Mon 12/122:00MIA - LHR
Nonstop8h 45mVirgin Atlantic
Deal found 23/11£455
Wed 3/1214:30LHR - MIA
Nonstop10h 00mBritish Airways
Wed 7/119:55MIA - LHR
1 stop14h 40mBritish Airways
Deal found 24/11£456
Wed 3/1217:00LHR - MIA
2 stops21h 20mFinnair
Mon 8/1219:50MIA - LHR
2 stops21h 20mFinnair
Deal found 24/11£457
Thu 25/1210:10LHR - MIA
1 stop18h 13mVirgin Atlantic
Wed 14/121:25MIA - LHR
Nonstop8h 45mVirgin Atlantic
Deal found 24/11£458
Mon 8/1206:05LHR - MIA
1 stop14h 15mBritish Airways
Tue 16/1216:08MIA - LHR
1 stop13h 27mBritish Airways
Deal found 24/11£459
Thu 4/1211:15LHR - EYW
1 stop16h 52mBritish Airways
Thu 11/1216:10EYW - LHR
1 stop14h 55mBritish Airways
Deal found 24/11£586

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 25 November 2025.

Round-trip from

£445

One-way from

£345

Popular in

December

Cheapest in

September

Average price

£466
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 1/3-8/3
  • 2 total stops
  • 31h 40m total
  • London to Florida Keys
Search Deals
Air Canada
  • Air Canada
  • 29/4
  • 2 total stops
  • 27h 47m total
  • London to Florida Keys
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£18 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 25 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

Tue 27/1

09:00-17:30

1 stop13h 30m

Miami

Thu 12/2

18:35-10:50

1 stop11h 15m

£466

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sun 11/1

16:15-16:50

1 stop29h 35m

Miami

Mon 26/1

16:29-09:40

1 stop12h 11m

£472

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 10/2

18:10-16:50

1 stop27h 40m

Miami

Fri 27/2

18:30-08:15

Nonstop8h 45m

£472

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Wed 21/1

11:25-20:45

1 stop14h 20m

Miami

Wed 4/2

18:50-08:35

Nonstop8h 45m

£473

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 12/1

08:30-22:15

2 stops18h 45m

Miami

Thu 29/1

11:00-06:40

2 stops14h 40m

£473

LondonKey West

LHR - EYW

LHREYW

London Heathrow

Mon 26/1

06:05-23:56

2 stops22h 51m

Key West

Tue 3/2

19:45-06:50

1 stop30h 05m

£477

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 4/5

08:45-17:30

1 stop13h 45m

Miami

Thu 14/5

13:00-07:40

1 stop13h 40m

£477

LondonKey West

LHR - EYW

LHREYW

London Heathrow

Mon 26/1

06:05-23:56

2 stops22h 51m

Key West

Sun 1/2

19:45-08:35

1 stop31h 50m

£477

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 15/12

09:15-20:45

1 stop16h 30m

Miami

Fri 16/1

13:50-08:15

1 stop13h 25m

£478

LondonKey West

LHR - EYW

LHREYW

London Heathrow

Wed 28/1

11:25-19:10

2 stops36h 45m

Key West

Mon 2/2

13:33-06:50

1 stop12h 17m

£478

Flights are sorted by cheapest return flights first.

Deals found on 23/11

Showing 1-10 of 32 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 £450). Flying from London Heathrow Airport to Florida Keys in July is currently the most expensive (average of £643). 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 25 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
1,420 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.3

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
1,420 reviews
KLM
7.7
Good
1,420 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.3

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
1,420 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.3

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
1,420 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.3

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
2,073 reviews
KLM
7.7
Good
1,420 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.3

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
7,536 reviews
KLM
7.7
Good
1,420 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.3

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 United Airlines, Finnair, or British Airways 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 Air Canada, which is currently one of the cheapest options available, starting at £353. Finnair flights start at £369 while deals on British Airways start at £376 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 £450). Flying from London Heathrow Airport to Florida Keys in July is currently the most expensive (average of £643). 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 25 November 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£462Average£555FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£503Average£916FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
American AirlinesCheapest£529Average£569FlexibilityNo 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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