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Cheap flights from Florida Keys to London from £122

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Florida Keys to London departing on 6/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Cheap return flights

SWISS Logo
19:40 - 13:00MIA-LHR
12h 20m1 stop
SWISS Logo
17:10 - 17:30LHR-MIA
29h 20m1 stop
£203SWISS
Find Deal
Tue, 12 Aug - Tue, 19 Aug
SWISS Logo
20:50 - 13:00MIA-LHR
12h 10m1 stop
SWISS Logo
20:05 - 17:30LHR-MIA
26h 25m1 stop
£240SWISS
Find Deal
Mon, 27 Oct - Sun, 9 Nov
Virgin Atlantic Logo
19:30 - 13:30MIA-LHR
13h 00m1 stop
Virgin Atlantic Logo
06:15 - 14:15LHR-MIA
13h 00m1 stop
£323Virgin Atlantic
Find Deal
Mon, 18 Aug - Wed, 27 Aug
Virgin Atlantic Logo
22:30 - 12:15MIA-LHR
8h 45mdirect
Virgin Atlantic Logo
06:15 - 14:15LHR-MIA
13h 00m1 stop
£328Virgin Atlantic
Find Deal
Mon, 18 Aug - Wed, 27 Aug
Virgin Atlantic Logo
19:25 - 09:25MIA-LHR
9h 00mdirect
Virgin Atlantic Logo
15:55 - 20:35LHR-MIA
9h 40mdirect
£338Virgin Atlantic
Find Deal
Mon, 18 Aug - Wed, 27 Aug
United Airlines Logo
06:25 - 05:55MIA-LHR
18h 30m1 stop
United Airlines Logo
08:45 - 17:30LHR-MIA
13h 45m1 stop
£349United Airlines
Find Deal
Sun, 10 Aug - Tue, 26 Aug
United Airlines Logo
08:40 - 07:40MIA-LHR
18h 00m1 stop
United Airlines Logo
08:40 - 17:30LHR-MIA
13h 50m1 stop
£351United Airlines
Find Deal
Mon, 18 Aug - Wed, 27 Aug
British Airways Logo
17:00 - 06:55MIA-LHR
8h 55mdirect
British Airways Logo
06:30 - 17:25LHR-MIA
15h 55m1 stop
£367British Airways
Find Deal
Wed, 13 Aug - Wed, 17 Sep
British Airways Logo
17:00 - 06:55MIA-LHR
8h 55mdirect
British Airways Logo
08:45 - 17:15LHR-MIA
13h 30m1 stop
£370British Airways
Find Deal
Mon, 18 Aug - Wed, 27 Aug
Finnair Logo
18:55 - 12:00MIA-LHR
12h 05m1 stop
Finnair Logo
18:10 - 16:30LHR-MIA
27h 20m1 stop
£370Finnair
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Mon, 26 Jan - Tue, 10 Feb

Virgin Atlantic flights from Florida Keys to London Heathrow Airport

Our best Virgin Atlantic deals on Florida Keys to London Heathrow Airport flight tickets
Virgin Atlantic
18 Aug
MIA19:30Miami
13h 00m
1 stop
LHR13:30London Heathrow
27 Aug
LHR06:15London Heathrow
13h 00m
1 stop
MIA14:15Miami
£323
Find similar
Virgin Atlantic
18 Aug
MIA22:30Miami
8h 45m
LHR12:15London Heathrow
27 Aug
LHR06:15London Heathrow
13h 00m
1 stop
MIA14:15Miami
£328
Find similar
Virgin Atlantic
18 Aug
MIA19:25Miami
9h 00m
LHR09:25London Heathrow
27 Aug
LHR15:55London Heathrow
9h 40m
MIA20:35Miami
£338
Find similar

SWISS flights from Florida Keys to London Heathrow Airport

Our best SWISS deals on Florida Keys to London Heathrow Airport flight tickets
SWISS
12 Aug
MIA19:40Miami
12h 20m
1 stop
LHR13:00London Heathrow
19 Aug
LHR17:10London Heathrow
29h 20m
1 stop
MIA17:30Miami
£203
Find similar
SWISS
27 Oct
MIA20:50Miami
12h 10m
1 stop
LHR13:00London Heathrow
9 Nov
LHR20:05London Heathrow
26h 25m
1 stop
MIA17:30Miami
£240
Find similar
SWISS
6 Aug
MIA19:40Miami
15h 45m
1 stop
LHR16:25London Heathrow
21 Aug
LHR08:40London Heathrow
13h 50m
1 stop
MIA17:30Miami
£381
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Florida Keys to London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 1 August 2025.
Use the filters below to find and compare flights from Florida Keys to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

MiamiLondon

MIA - LHR

MIALHR

Miami

Tue 12/8

19:40-13:00

1 stop12h 20m

London Heathrow

Tue 19/8

17:10-17:30

1 stop29h 20m

£203

MiamiLondon

MIA - LHR

MIALHR

Miami

Mon 27/10

20:50-13:00

1 stop12h 10m

London Heathrow

Sun 9/11

20:05-17:30

1 stop26h 25m

£240

MiamiLondon

MIA - LHR

MIALHR

Miami

Mon 18/8

19:30-13:30

1 stop13h 00m

London Heathrow

Wed 27/8

06:15-14:15

1 stop13h 00m

£323

MiamiLondon

MIA - LHR

MIALHR

Miami

Mon 18/8

22:30-12:15

Nonstop8h 45m

London Heathrow

Wed 27/8

06:15-14:15

1 stop13h 00m

£328

MiamiLondon

MIA - LHR

MIALHR

Miami

Mon 18/8

19:25-09:25

Nonstop9h 00m

London Heathrow

Wed 27/8

15:55-20:35

Nonstop9h 40m

£338

MiamiLondon

MIA - LHR

MIALHR

Miami

Sun 10/8

06:25-05:55

1 stop18h 30m

London Heathrow

Tue 26/8

08:45-17:30

1 stop13h 45m

£349

MiamiLondon

MIA - LHR

MIALHR

Miami

Mon 18/8

08:40-07:40

1 stop18h 00m

London Heathrow

Wed 27/8

08:40-17:30

1 stop13h 50m

£351

MiamiLondon

MIA - LHR

MIALHR

Miami

Wed 13/8

17:00-06:55

Nonstop8h 55m

London Heathrow

Wed 17/9

06:30-17:25

1 stop15h 55m

£367

MiamiLondon

MIA - LHR

MIALHR

Miami

Mon 18/8

17:00-06:55

Nonstop8h 55m

London Heathrow

Wed 27/8

08:45-17:15

1 stop13h 30m

£370

MiamiLondon

MIA - LHR

MIALHR

Miami

Mon 26/1

18:55-12:00

1 stop12h 05m

London Heathrow

Tue 10/2

18:10-16:30

1 stop27h 20m

£370

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Florida Keys to London Heathrow Airport

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

What is the cheapest month to fly to London Heathrow Airport?

In general, February is the cheapest month to fly from Florida Keys to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £403. The month of October is another great option to travel to London Heathrow Airport, with average flight prices from Florida Keys averaging around £475.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Florida Keys is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £481. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £657.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is at midday. momondo users have found flights departing from Florida Keys to London Heathrow Airport at midday for as low as £526. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are £585 on average. Flights to London Heathrow Airport from Florida Keys in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to London Heathrow Airport from Florida Keys when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £544 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Florida Keys for as low as £485 on momondo.

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

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

Cheap Florida Keys to London Heathrow Airport flight deals and tips

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

Best price found

£122

Fastest flight time

8h 30m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from Florida Keys in the past 72 hours is £122. The best return flight deal from Florida Keys to London Heathrow Airport found on momondo in the last 72 hours is £203.
The fastest flight from Florida Keys to London Heathrow Airport takes 8h 30m
Direct flights go from Florida Keys to London Heathrow Airport every day.
Search flight deals

  • When did momondo last update prices for flights from Florida Keys to London Heathrow Airport?

    Prices for flights from Florida Keys to London Heathrow Airport were last updated today.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Florida Keys to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Florida Keys to London Heathrow Airport?

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Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Florida Keys.

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

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

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Florida Keys to London.

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

Of course. momondo tracks the price of Florida Keys to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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