What is the cheapest airline that flies from London Heathrow to Florida Keys?

British Airways, United Airlines, and Virgin Atlantic are the most popular carriers operating from London Heathrow to Florida Keys

How many operators does momondo search for flights from London Heathrow Airport to Florida Keys?

There are 17 operators available for flights from London Heathrow Airport to Florida Keys as of September 2026.

How old do you have to be to fly from London Heathrow Airport to Florida Keys?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Florida Keys.

What documentation or ID do you need to fly to Florida Keys?

The necessary travel and health documents for your Florida Keys trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£335 Cheap Flights from London Heathrow Airport to Florida Keys in 2026/27

Q: How many flights depart from London Heathrow Airport to Florida Keys on average per week?

The number of flights available between London Heathrow Airport and Florida Keys is 112 per week as of September 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.

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Find the cheapest flights from London Heathrow Airport to Florida Keys

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One-way

Last minute

Direct

Cheap return flights

Enter your travel dates to find the best prices.

12:15 - 20:50LHR London Heathrow-MIA Miami

13h 35m1 stop Reykjavik Keflavik Intl

17:15 - 19:30MIA Miami-LHR London Heathrow

21h 15m1 stop Reykjavik Keflavik Intl

£355Icelandair

Thu, 5 Nov - Wed, 11 Nov

06:00 - 14:35LHR London Heathrow-MIA Miami

13h 35m1 stop Zurich

16:40 - 19:15MIA Miami-LHR London Heathrow

21h 35m1 stop Zurich

£413SWISS

Sun, 29 Nov - Thu, 10 Dec

09:00 - 17:30LHR London Heathrow-MIA Miami

13h 30m1 stop Zurich

16:40 - 16:20MIA Miami-LHR London Heathrow

18h 40m1 stop Zurich

£422United Airlines

Thu, 19 Nov - Mon, 30 Nov

08:20 - 19:03LHR London Heathrow-MIA Miami

15h 43m1 stop New York John F Kennedy Intl

16:24 - 07:50MIA Miami-LHR London Heathrow

11h 26m1 stop Atlanta Hartsfield-Jackson

£424Virgin Atlantic

Sun, 4 Oct - Thu, 29 Oct

10:55 - 15:50LHR London Heathrow-MIA Miami

9h 55mdirect

16:24 - 07:50MIA Miami-LHR London Heathrow

11h 26m1 stop Atlanta Hartsfield-Jackson

£425Virgin Atlantic

Sun, 4 Oct - Thu, 29 Oct

14:10 - 22:02LHR London Heathrow-MIA Miami

12h 52m1 stop New York John F Kennedy Intl

16:17 - 07:20MIA Miami-LHR London Heathrow

11h 03m1 stop Charlotte Douglas

£433British Airways

Sat, 3 Oct - Tue, 27 Oct

07:00 - 17:30LHR London Heathrow-MIA Miami

15h 30m2 stops Geneva Geneve-Cointrin Zurich

16:40 - 19:15MIA Miami-LHR London Heathrow

21h 35m1 stop Zurich

£436SWISS

Sun, 29 Nov - Thu, 10 Dec

09:45 - 14:40LHR London Heathrow-MIA Miami

9h 55mdirect

22:00 - 11:30MIA Miami-LHR London Heathrow

8h 30mdirect

£448British Airways

Thu, 19 Nov - Mon, 30 Nov

12:15 - 20:50LHR London Heathrow-MIA Miami

13h 35m1 stop Reykjavik Keflavik Intl

17:15 - 10:50MIA Miami-LHR London Heathrow

12h 35m1 stop Reykjavik Keflavik Intl

£453Icelandair

Sun, 24 Jan - Fri, 12 Feb

10:00 - 22:19LHR London Heathrow-MIA Miami

17h 19m1 stop Houston George Bush Intcntl

13:52 - 10:50MIA Miami-LHR London Heathrow

16h 58m2 stops Newark Washington, D.C. Dulles Intl

£454United Airlines

Fri, 9 Oct - Wed, 28 Oct

Cheap last-minute flights

Enter your travel dates to find the best prices.

06:50 - 18:52LHR London Heathrow-MIA Miami

17h 02m2 stops Brussels Bruxelles-National Newark

13:26 - 06:55MIA Miami-LHR London Heathrow

12h 29m1 stop Washington, D.C. Dulles Intl

£432United Airlines

Sat, 19 Sep - Sat, 26 Sep

06:50 - 18:52LHR London Heathrow-MIA Miami

17h 02m2 stops Brussels Bruxelles-National Newark

12:29 - 10:25MIA Miami-LHR London Heathrow

16h 56m2 stops Chicago O'Hare Intl Newark

£432United Airlines

Sat, 19 Sep - Sat, 26 Sep

06:30 - 14:45LHR London Heathrow-MIA Miami

13h 15m1 stop Amsterdam Schiphol

12:21 - 06:20MIA Miami-LHR London Heathrow

12h 59m1 stop New York John F Kennedy Intl

£437Virgin Atlantic

Sat, 19 Sep - Sat, 26 Sep

10:55 - 15:50LHR London Heathrow-MIA Miami

9h 55mdirect

13:12 - 07:10MIA Miami-LHR London Heathrow

12h 58m1 stop Detroit Metropolitan Wayne County

£450KLM

Sat, 19 Sep - Sat, 26 Sep

11:45 - 23:15LHR London Heathrow-MIA Miami

16h 30m2 stops Amsterdam Schiphol New York John F Kennedy Intl

15:23 - 08:50MIA Miami-LHR London Heathrow

12h 27m1 stop New York John F Kennedy Intl

£453Delta

Mon, 21 Sep - Fri, 2 Oct

11:45 - 23:15LHR London Heathrow-MIA Miami

16h 30m2 stops Amsterdam Schiphol New York John F Kennedy Intl

09:00 - 06:45MIA Miami-LHR London Heathrow

16h 45m1 stop New York LaGuardia

£453Delta

Mon, 21 Sep - Tue, 29 Sep

14:10 - 12:14LHR London Heathrow-MIA Miami

27h 04m1 stop Toronto Pearson Intl

13:15 - 10:00MIA Miami-LHR London Heathrow

15h 45m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

£453Air Canada

Mon, 21 Sep - Sun, 4 Oct

14:05 - 22:17LHR London Heathrow-MIA Miami

13h 12m1 stop Montreal Pierre Elliott Trudeau Intl

07:55 - 06:30MIA Miami-LHR London Heathrow

17h 35m1 stop Montreal Pierre Elliott Trudeau Intl

£456Air Canada

Mon, 21 Sep - Sat, 3 Oct

20:55 - 23:15LHR London Heathrow-MIA Miami

31h 20m2 stops Amsterdam Schiphol New York John F Kennedy Intl

07:06 - 07:40MIA Miami-LHR London Heathrow

19h 34m2 stops New York John F Kennedy Intl Amsterdam Schiphol

£465KLM

Sun, 20 Sep - Sun, 4 Oct

19:45 - 17:50LHR London Heathrow-MIA Miami

27h 05m1 stop Paris Charles de Gaulle

18:05 - 08:05MIA Miami-LHR London Heathrow

9h 00mdirect

£474Virgin Atlantic

Thu, 17 Sep - Wed, 30 Sep

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United Airlines flights from London Heathrow Airport to Florida Keys

Our best United Airlines deals on London Heathrow Airport to Florida Keys flight tickets

United Airlines

19 Nov

LHR09:00London Heathrow

13h 30m

1 stop

MIA17:30Miami

30 Nov

MIA16:40Miami

18h 40m

1 stop

LHR16:20London Heathrow

£422

United Airlines

19 Sept

LHR06:50London Heathrow

17h 02m

2 stops

MIA18:52Miami

26 Sept

MIA13:26Miami

12h 29m

1 stop

LHR06:55London Heathrow

£432

United Airlines

25 Sept

LHR07:45London Heathrow

16h 07m

1 stop

MIA18:52Miami

30 Sept

MIA19:59Miami

20h 21m

1 stop

LHR21:20London Heathrow

£455

Virgin Atlantic flights from London Heathrow Airport to Florida Keys

Our best Virgin Atlantic deals on London Heathrow Airport to Florida Keys flight tickets

Virgin Atlantic

4 Oct

LHR08:20London Heathrow

15h 43m

1 stop

MIA19:03Miami

29 Oct

MIA16:24Miami

11h 26m

1 stop

LHR07:50London Heathrow

£424

Virgin Atlantic

4 Oct

LHR10:55London Heathrow

9h 55m

MIA15:50Miami

29 Oct

MIA16:24Miami

11h 26m

1 stop

LHR07:50London Heathrow

£424

Virgin Atlantic

10 Oct

LHR10:55London Heathrow

9h 55m

MIA15:50Miami

27 Oct

MIA16:24Miami

12h 36m

1 stop

LHR09:00London Heathrow

£430

momondo Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Florida Keys that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonMiami

LHR London Heathrow - MIA Miami

LHRMIA

London Heathrow

Thu 5/11

12:15-20:50

1 stop13h 35m

Miami

Wed 11/11

17:15-19:30

1 stop21h 15m

£355

LondonMiami

LHR London Heathrow - MIA Miami

LHRMIA

London Heathrow

Sun 29/11

06:00-14:35

1 stop13h 35m

Miami

Thu 10/12

16:40-19:15

1 stop21h 35m

£413

LondonMiami

LHR London Heathrow - MIA Miami

LHRMIA

London Heathrow

Thu 19/11

09:00-17:30

1 stop13h 30m

Miami

Mon 30/11

16:40-16:20

1 stop18h 40m

£422

LondonMiami

LHR London Heathrow - MIA Miami

LHRMIA

London Heathrow

Sun 4/10

08:20-19:03

1 stop15h 43m

Miami

Thu 29/10

16:24-07:50

1 stop11h 26m

£424

LondonMiami

LHR London Heathrow - MIA Miami

LHRMIA

London Heathrow

Sun 4/10

10:55-15:50

Nonstop9h 55m

Miami

Thu 29/10

16:24-07:50

1 stop11h 26m

£424

LondonMiami

LHR London Heathrow - MIA Miami

LHRMIA

London Heathrow

Sat 3/10

14:10-22:02

1 stop12h 52m

Miami

Tue 27/10

16:17-07:20

1 stop11h 03m

£433

LondonMiami

LHR London Heathrow - MIA Miami

LHRMIA

London Heathrow

Sun 29/11

07:00-17:30

2 stops15h 30m

Miami

Thu 10/12

16:40-19:15

1 stop21h 35m

£436

Fastest return journey

LondonMiami

LHR London Heathrow - MIA Miami

LHRMIA

London Heathrow

Thu 19/11

09:45-14:40

Nonstop9h 55m

Miami

Mon 30/11

22:00-11:30

Nonstop8h 30m

£448

LondonMiami

LHR London Heathrow - MIA Miami

LHRMIA

London Heathrow

Sun 24/1

12:15-20:50

1 stop13h 35m

Miami

Fri 12/2

17:15-10:50

1 stop12h 35m

£453

LondonMiami

LHR London Heathrow - MIA Miami

LHRMIA

London Heathrow

Fri 9/10

10:00-22:19

1 stop17h 19m

Miami

Wed 28/10

13:52-10:50

2 stops16h 58m

£454

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London Heathrow Airport to Florida Keys

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Florida Keys?

The cheapest month to fly to Florida Keys from London Heathrow Airport is in February. Flight prices, which tend to average around £504, are often lower during this time because this is during the off-season. The month of January is another great option to travel to Florida Keys, with average flight prices from London Heathrow Airport averaging around £517.

What is the cheapest day to depart on your flight to Florida Keys?

The cheapest day to depart from London Heathrow Airport to Florida Keys is on a Wednesday. Travellers who choose to depart for Florida Keys on a Wednesday will often find tickets for as low as £598. On the other hand, Sunday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £666.

What is the cheapest time of day to depart on your flight to Florida Keys?

Our most recent data shows that the best time of day to fly to Florida Keys is at midday. Flights from London Heathrow Airport to Florida Keys during this time can be as low as £592. Flights in the afternoon are often more expensive, with an average ticket price of £654.

How far in advance should I book a flight from London Heathrow Airport to Florida Keys?

You are more likely to see cheaper flights to Florida Keys from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Florida Keys for around £573 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Florida Keys from London Heathrow Airport for as low as £522 on momondo.

Can stopping save me money on London Heathrow Airport to Florida Keys flights?

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Florida Keys.

Cheap London Heathrow Airport to Florida Keys flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Florida Keys

Best price found	£335
Fastest flight time	9h 35m
Direct flights	Every day
Airports in Florida Keys	3 airports

The best one-way flight to Florida Keys from London Heathrow Airport in the past 72 hours is £335. The best return flight deal from London Heathrow Airport to Florida Keys found on momondo in the last 72 hours is £355.

The fastest flight from London Heathrow Airport to Florida Keys takes 9h 35m

Direct flights go from London Heathrow Airport to Florida Keys every day.

There are 3 airports in Florida Keys. From London Heathrow Airport there are direct flights to Miami (MIA).

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Frequently asked questions about flying from London Heathrow Airport to Florida Keys

When did momondo last update prices for flights from London Heathrow Airport to Florida Keys?
Prices for flights from London Heathrow Airport to Florida Keys are updated daily.
How many operators does momondo search for flights from London Heathrow Airport to Florida Keys?
There are 17 operators available for flights from London Heathrow Airport to Florida Keys as of September 2026.
How old do you have to be to fly from London Heathrow Airport to Florida Keys?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Florida Keys.
What documentation or ID do you need to fly to Florida Keys?
The necessary travel and health documents for your Florida Keys trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from London Heathrow Airport to Florida Keys?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from London Heathrow Airport to Florida Keys is Boeing 787-9 Dreamliner (24.85% of total bookings). The next most popular plane models are Boeing 777 (14.08%), Airbus A350-1000 (13.96%), and Boeing 787-8 Dreamliner (9.29%).

Best airlines flying from London Heathrow Airport to Florida Keys

Compare and see reviews for airlines that fly from London Heathrow Airport to Florida Keys with momondo

Airline	Rating	Free Cancellation	Price
Virgin Atlantic	PriceFrom £438	Free Cancellation	Rating 7.4 694 reviews		Search Virgin Atlantic flights
British Airways	PriceFrom £487	Free Cancellation	Rating 6.7 8,218 reviews		Search British Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from London to Florida Keys?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from London to Florida Keys. momondo saves you time and could save you money on your trip.

Can I find flights from London to Florida Keys with flexible booking policies on momondo?

Yes. All flights to Florida Keys from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from London to Florida Keys?

Once all potential London to Florida Keys flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from London to Florida Keys right now. Can momondo alert me if prices change?

Price alerts on flights to Florida Keys from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.