Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Key Largo from £328

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 23/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — MIA
19 May — 26 May1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Key Largo are usually found in September or February, booked 72 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from Heathrow to Key Largo

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Key Largo
Explore the most affordable flight options available from Heathrow to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 April 2026.

Wed 27/509:55
LHR
-
MIA
Nonstop9h 35m
American Airlines
Thu 4/613:49
MIA
-
LHR
1 stop15h 26m
American Airlines
Deal found 17/4£501
Mon 25/509:55
LHR
-
MIA
Nonstop9h 35m
American Airlines
Thu 4/613:49
MIA
-
LHR
1 stop15h 26m
American Airlines
Deal found 17/4£501
Tue 13/1012:15
LHR
-
MIA
Nonstop9h 50m
British Airways
Tue 3/1122:20
MIA
-
LHR
Nonstop8h 45m
British Airways
Deal found 14/4£502
Thu 28/506:30
LHR
-
MIA
1 stop13h 15m
Virgin Atlantic
Thu 4/611:45
MIA
-
LHR
1 stop14h 00m
Virgin Atlantic
Deal found 16/4£503
Wed 1/709:55
LHR
-
MIA
Nonstop9h 35m
British Airways
Wed 12/819:35
MIA
-
LHR
Nonstop8h 50m
British Airways
Deal found 16/4£504
Thu 7/506:30
LHR
-
MIA
1 stop13h 15m
Virgin Atlantic
Tue 19/518:05
MIA
-
LHR
Nonstop9h 00m
Virgin Atlantic
Deal found 16/4£504
Wed 1/711:30
LHR
-
MIA
1 stop14h 15m
Virgin Atlantic
Sun 12/711:24
MIA
-
LHR
1 stop13h 56m
Virgin Atlantic
Deal found 15/4£505
Tue 21/406:30
LHR
-
MIA
1 stop13h 15m
Virgin Atlantic
Sat 25/417:51
MIA
-
LHR
1 stop21h 19m
Virgin Atlantic
Deal found 14/4£506
Tue 21/718:05
LHR
-
MIA
1 stop35h 16m
Finnair
Tue 28/719:35
MIA
-
LHR
Nonstop8h 50m
Finnair
Deal found 14/4£507
Wed 15/711:45
LHR
-
MIA
2 stops16h 52m
Virgin Atlantic
Mon 20/722:35
MIA
-
LHR
Nonstop9h 00m
Virgin Atlantic
Deal found 15/4£507
Sat 16/506:30
LHR
-
MIA
1 stop13h 15m
Virgin Atlantic
Fri 22/519:30
MIA
-
LHR
1 stop14h 05m
Virgin Atlantic
Deal found 15/4£508
Wed 15/411:30
LHR
-
MIA
1 stop13h 55m
Iberia
Mon 20/416:02
MIA
-
LHR
1 stop10h 48m
Iberia
Deal found 14/4£509

Find flight deals from Heathrow to Key Largo

Keep the following information in mind while searching for Heathrow to Key Largo flight deals. Data was last updated 19 April 2026.

Round-trip from

£501

One-way from

£328

Popular in

December

Cheapest in

September

Average price

£535
American Airlines
  • American Airlines
  • 27/5-4/6
  • 1 total stop
  • 25h 01m total
  • London to Key Largo
Search Deals
Avianca
  • Avianca
  • 23/4
  • 1 total stop
  • 19h 20m total
  • London to Key Largo
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (£0 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Key Largo 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 19 April 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 21/5

20:50-20:00

1 stop28h 10m

Miami

Sun 24/5

21:45-09:10

1 stop30h 25m

£512

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 25/5

11:30-20:45

1 stop14h 15m

Miami

Tue 9/6

15:25-08:50

1 stop12h 25m

£537

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 9/7

08:55-17:50

1 stop13h 55m

Miami

Tue 21/7

13:38-07:10

1 stop12h 32m

£540

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 9/6

15:50-20:45

Nonstop9h 55m

Miami

Thu 2/7

22:35-12:35

Nonstop9h 00m

£541

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Wed 29/4

11:30-20:45

1 stop14h 15m

Miami

Tue 5/5

22:35-12:35

Nonstop9h 00m

£542

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 26/5

12:15-16:55

Nonstop9h 40m

Miami

Mon 27/7

17:00-06:55

Nonstop8h 55m

£545

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sun 3/5

10:55-15:50

Nonstop9h 55m

Miami

Tue 19/5

22:35-12:35

Nonstop9h 00m

£550

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 5/5

06:30-14:45

1 stop13h 15m

Miami

Fri 15/5

18:05-08:05

Nonstop9h 00m

£551

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 20/7

18:05-08:50

1 stop19h 45m

Miami

Mon 3/8

21:50-21:40

1 stop18h 50m

£552

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sat 27/6

10:55-15:50

Nonstop9h 55m

Miami

Sat 11/7

19:16-13:15

1 stop12h 59m

£553

Flights are sorted by cheapest return flights first.

Deals found on 14/4

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Heathrow to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo 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 Key Largo

How far ahead should I book a flight from London Heathrow Airport to Key Largo?

Use this chart to determine the optimal time to book a return flight from Heathrow to Key Largo. Price data was last updated on 17 April 2026.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Key Largo, you should look to book at least 72 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest time of day to fly from LHR to KE9?

Find hourly flight availability from Heathrow to Key Largo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 19 April 2026.

When flying from London Heathrow Airport to Key Largo, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from London Heathrow Airport to Key Largo

Explore weekly flight availability from Heathrow to Key Largo. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 19 April 2026.

The most flights from LHR to KE9 are scheduled on a Wednesday (32 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (24 on average).

How much does it cost for a return flight from London Heathrow Airport to Key Largo?

Reviews of airlines servicing Key Largo

Get insights into the airlines that provide service to Key Largo. 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 Key Largo. Reviews last updated 19 April 2026.
Read reviews from past customers who have flown with KLM,Virgin Atlantic, andAmerican Airlines from London Heathrow Airport to Key Largo. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,502 reviews
Check prices

Overall

7.8

Entertainment

7.1

Food

7.3

Crew

8.4

Comfort

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.8
Good
1,502 reviews
KLM
7.8
Good
1,502 reviews
Check prices

Overall

7.8

Entertainment

7.1

Food

7.3

Crew

8.4

Comfort

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Virgin Atlantic
7.5
Good
687 reviews
KLM
7.8
Good
1,502 reviews
Check prices

Overall

7.8

Entertainment

7.1

Food

7.3

Crew

8.4

Comfort

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
American Airlines
7.1
Good
11,620 reviews
KLM
7.8
Good
1,502 reviews
Check prices

Overall

7.8

Entertainment

7.1

Food

7.3

Crew

8.4

Comfort

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Iberia
7.0
Good
3,182 reviews
KLM
7.8
Good
1,502 reviews
Check prices

Overall

7.8

Entertainment

7.1

Food

7.3

Crew

8.4

Comfort

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
British Airways
6.7
Okay
7,893 reviews
KLM
7.8
Good
1,502 reviews
Check prices

Overall

7.8

Entertainment

7.1

Food

7.3

Crew

8.4

Comfort

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Key Largo. 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 Key Largo?

    LEVEL, Virgin Atlantic, and KLM can get you from London Heathrow Airport to Key Largo in just under 9h 55m. Your travel time can differ by up to 18h 15m. There are 4414 mi between London Heathrow Airport and Key Largo. 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 Key Largo one-way?

    The cheapet airlines for a one-way flight from London Heathrow Airport to Key Largo are TAP AIR PORTUGAL (£248), Aer Lingus (£290), and Lufthansa (£302).

  • What are the most reliable airlines from London Heathrow Airport to Key Largo?

    The top 3 most reliable airlines when flying from London Heathrow Airport to Key Largo are Malaysia Airlines (91%), Gulf Air (88%) and SriLankan Airlines (84%).

  • What are the cheapest flights from London Heathrow Airport to Key Largo?

    Looking at all options, your cheapest flight can be booked for £432. While the most popular route (London Heathrow - Miami) can be booked for £375 on average, our data indicates £1,627 when flying from London Heathrow Airport to Key Largo.

  • Can I find deals for flights from Heathrow to Key Largo that include hotel bookings?

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

  • How can I find direct flights from Heathrow to Key Largo?

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

  • Can I find deals for business class flights from Heathrow to Key Largo?

    Yes. Cheapflights offers flight deals from Heathrow to Key Largo by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Orlando flights
Heathrow to Miami flights
Gatwick to Orlando flights
Stansted to Orlando flights
Gatwick to Miami flights
Stansted to Miami flights
London City to Orlando flights
London City to Miami flights
Luton to Miami flights
Heathrow to Tampa flights
Luton to Orlando flights
Heathrow to Fort Lauderdale flights
Gatwick to Fort Lauderdale flights
Gatwick to Tampa flights
Stansted to Tampa flights
London City to Tampa flights
Heathrow to West Palm Beach flights
Gatwick to West Palm Beach flights
Southend to Miami flights
Heathrow to Fort Myers flights
Luton to Tampa flights
Heathrow to Jacksonville flights
Heathrow to Melbourne flights
Luton to Fort Lauderdale flights
Gatwick to Fort Myers flights
Stansted to Fort Lauderdale flights
Gatwick to Jacksonville flights
Heathrow to Sarasota flights
London City to Fort Lauderdale flights
London City to Fort Myers flights
Heathrow to Pensacola flights
Gatwick to Pensacola flights
Gatwick to Melbourne flights
Heathrow to Daytona Beach flights
Stansted to Fort Myers flights
London City to Melbourne flights
London City to West Palm Beach flights
Heathrow to Panama City flights
Heathrow to Key West flights
Gatwick to Sarasota flights
London City to Jacksonville flights
London City to Pensacola flights
Southend to Orlando flights
Heathrow to Gainesville flights
London City to Sarasota flights
Gatwick to Panama City flights
Heathrow to Valparaiso flights
London City to Key West flights
London City to Panama City flights
Gatwick to Daytona Beach flights

Top 10 airlines flying from Heathrow to Key Largo

Discover the top 10 airlines that operate flights from Heathrow to Key Largo. 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 19 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£275Average£414FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£295Average£390FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
SWISSCheapest£297Average£363FlexibilityNo cancel feeOn-time79%
Search SWISS flights
DeltaCheapest£301Average£622FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£308Average£363FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
United AirlinesCheapest£353Average£511FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest£356Average£527FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapest£358Average£497FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
TAP AIR PORTUGALCheapest£362Average£498FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air FranceCheapest£362Average£521FlexibilityNo cancel feeOn-time77%
Search Air France flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Key Largo?

Cheapflights makes it easy to find Heathrow to Key Largo flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Key Largo?

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Key Largo 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 Key Largo with no change fees?

Yes! Cheapflights helps users easily find flights from Heathrow to Key Largo with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Key Largo become cheaper?

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

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.