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Cheap flights from London Heathrow Airport to Florida Keys from £323

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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — EYW
18 Dec — 25 Dec1
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 18 November 2025.

Thu 25/1209:25LHR - MIA
Nonstop10h 25mMultiple Airlines
Mon 26/115:37MIA - LHR
1 stop11h 28mMultiple Airlines
Deal found 17/11£438
Thu 25/1210:10LHR - MIA
1 stop18h 13mDelta
Mon 26/112:02MIA - LHR
1 stop15h 43mDelta
Deal found 17/11£439
Wed 3/1220:35LHR - MIA
1 stop29h 20mIcelandair
Wed 17/1217:15MIA - LHR
1 stop21h 15mIcelandair
Deal found 16/11£441
Tue 2/1212:15LHR - MIA
1 stop13h 40mIcelandair
Wed 10/1217:15MIA - LHR
1 stop12h 35mIcelandair
Deal found 15/11£441
Mon 1/1220:35LHR - MIA
1 stop29h 20mIcelandair
Wed 17/1217:15MIA - LHR
1 stop21h 15mIcelandair
Deal found 15/11£443
Thu 4/1212:15LHR - MIA
1 stop13h 40mIcelandair
Wed 10/1217:15MIA - LHR
1 stop12h 35mIcelandair
Deal found 16/11£444
Thu 4/1212:15LHR - MIA
1 stop13h 40mIcelandair
Sun 7/1217:15MIA - LHR
1 stop12h 35mIcelandair
Deal found 15/11£444
Wed 3/1220:35LHR - MIA
1 stop29h 20mIcelandair
Wed 10/1217:15MIA - LHR
1 stop12h 35mIcelandair
Deal found 16/11£445
Thu 11/1206:30LHR - MIA
1 stop13h 20mVirgin Atlantic
Tue 16/1221:25MIA - LHR
Nonstop8h 45mVirgin Atlantic
Deal found 15/11£449
Tue 2/1218:30LHR - MIA
1 stop25h 20mTAP AIR PORTUGAL
Tue 9/1216:35MIA - LHR
1 stop25h 05mTAP AIR PORTUGAL
Deal found 17/11£450
Thu 11/1208:55LHR - MIA
1 stop13h 45mVirgin Atlantic
Wed 24/1221:25MIA - LHR
Nonstop8h 45mVirgin Atlantic
Deal found 16/11£452
Thu 4/1206:40LHR - MIA
1 stop16h 25mScandinavian Airlines
Sat 17/120:40MIA - LHR
1 stop15h 20mScandinavian Airlines
Deal found 17/11£454

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 18 November 2025.

Round-trip from

£435

One-way from

£323

Popular in

December

Cheapest in

September

Average price

£462
Scandinavian Airlines
  • Scandinavian Airlines
  • 19/1-22/1
  • 4 total stops
  • 42h 30m total
  • London to Florida Keys
Search Deals
British Airways
  • British Airways
  • 9/3
  • Nonstop
  • 10h 00m 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 18 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 24/2

09:25-14:50

Nonstop10h 25m

Miami

Mon 9/3

22:25-11:10

Nonstop8h 45m

£468

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sat 21/2

14:00-19:25

Nonstop10h 25m

Miami

Fri 27/2

21:25-11:10

Nonstop8h 45m

£468

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 26/2

14:00-19:25

Nonstop10h 25m

Miami

Thu 5/3

21:25-11:10

Nonstop8h 45m

£468

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 25/12

10:10-23:23

1 stop18h 13m

Miami

Sat 17/1

21:25-11:10

Nonstop8h 45m

£468

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Fri 26/12

12:30-00:48

1 stop17h 18m

Miami

Tue 30/12

15:35-08:05

1 stop11h 30m

£470

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 24/3

16:15-17:50

1 stop29h 35m

Miami

Tue 31/3

15:04-07:45

1 stop11h 41m

£473

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 11/12

06:30-14:50

1 stop13h 20m

Miami

Thu 8/1

13:21-07:50

1 stop13h 29m

£477

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sat 6/12

08:55-20:20

1 stop16h 25m

Miami

Thu 18/12

17:20-10:15

1 stop11h 55m

£482

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 8/1

08:15-17:50

1 stop14h 35m

Miami

Tue 13/1

07:11-06:15

1 stop18h 04m

£484

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sat 10/1

07:20-17:50

1 stop15h 30m

Miami

Thu 15/1

22:50-12:20

Nonstop8h 30m

£484

Flights are sorted by cheapest return flights first.

Deals found on 17/11

Showing 1-10 of 29 results
1
2
3

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 £444). Flying from London Heathrow Airport to Florida Keys in July is currently the most expensive (average of £640). 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 18 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
1,411 reviews
Check prices

Entertainment

7.1

Crew

8.4

Food

7.3

Overall

7.7

Boarding

7.8

Comfort

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
1,411 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Entertainment

7.1

Crew

8.4

Food

7.3

Overall

7.7

Boarding

7.8

Comfort

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
1,411 reviews
Check prices

Entertainment

7.1

Crew

8.4

Food

7.3

Overall

7.7

Boarding

7.8

Comfort

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
673 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Entertainment

7.1

Crew

8.4

Food

7.3

Overall

7.7

Boarding

7.8

Comfort

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
2,064 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Entertainment

7.1

Crew

8.4

Food

7.3

Overall

7.7

Boarding

7.8

Comfort

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
7,528 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Entertainment

7.1

Crew

8.4

Food

7.3

Overall

7.7

Boarding

7.8

Comfort

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 10h 25m. Fly via Delta 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 Iberia, which is currently one of the cheapest options available, starting at £334. British Airways flights start at £334 while deals on United Airlines start at £343 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 £444). Flying from London Heathrow Airport to Florida Keys in July is currently the most expensive (average of £640). 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 18 November 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£459Average£552FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£500Average£912FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
American AirlinesCheapest£527Average£567FlexibilityNo 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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