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Cheap flights from London Heathrow Airport to Key Largo from £362

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 22/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — MIA
6 Feb — 13 Feb1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Key Largo are usually found in September or November, booked 7 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap 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 7 January 2026.

Round-trip from

£400

One-way from

£362

Popular in

August

Cheapest in

September

Average price

£481
Virgin Atlantic
  • Virgin Atlantic
  • 5/4-24/4
  • 1 total stop
  • 39h 00m total
  • London to Key Largo
Search Deals
Royal Air Maroc
  • Royal Air Maroc
  • 22/1
  • 1 total stop
  • 31h 10m total
  • London to Key Largo
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£29 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Find 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 7 January 2026.

Tue 13/111:15LHR - MIA
Nonstop10h 10mIberia
Wed 28/114:39MIA - LHR
1 stop12h 11mIberia
Deal found 6/1£400
Fri 20/312:05LHR - MIA
1 stop32h 06mUnited Airlines
Sat 28/318:34MIA - LHR
2 stops21h 06mUnited Airlines
Deal found 6/1£401
Wed 11/214:30LHR - MIA
Nonstop10h 00mBritish Airways
Wed 18/217:10MIA - LHR
Nonstop8h 40mBritish Airways
Deal found 6/1£401
Mon 16/310:20LHR - MIA
1 stop13h 15mScandinavian Airlines
Mon 23/321:40MIA - LHR
2 stops14h 45mScandinavian Airlines
Deal found 6/1£402
Wed 14/111:15LHR - MIA
Nonstop10h 10mFinnair
Tue 27/118:00MIA - LHR
1 stop10h 40mFinnair
Deal found 6/1£403
Sat 4/413:40LHR - MIA
1 stop26h 29mUnited Airlines
Thu 30/409:16MIA - LHR
2 stops16h 39mUnited Airlines
Deal found 6/1£404
Wed 4/206:30LHR - MIA
2 stops17h 00mKLM
Wed 18/212:00MIA - LHR
2 stops14h 40mKLM
Deal found 6/1£404
Wed 14/109:00LHR - MIA
2 stops31h 39mAir Canada
Sun 18/107:25MIA - LHR
2 stops18h 45mAir Canada
Deal found 6/1£405
Mon 26/106:40LHR - MIA
2 stops16h 55mScandinavian Airlines
Wed 4/219:55MIA - LHR
2 stops17h 35mScandinavian Airlines
Deal found 6/1£406
Tue 13/111:25LHR - MIA
1 stop14h 20mBritish Airways
Sun 18/122:50MIA - LHR
Nonstop8h 30mBritish Airways
Deal found 6/1£407
Mon 16/313:25LHR - MIA
1 stop13h 04mMultiple Airlines
Tue 24/312:25MIA - LHR
2 stops15h 40mMultiple Airlines
Deal found 6/1£407

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 7 January 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Key Largo that are best for you.

Fly from

Heathrow

Fly to

Key Largo

Route

Depart

Return

Price

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sun 1/3

09:25-14:50

Nonstop10h 25m

Miami

Mon 9/3

23:00-11:45

Nonstop8h 45m

£404

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Wed 4/2

06:30-18:30

2 stops17h 00m

Miami

Wed 18/2

12:00-07:40

2 stops14h 40m

£404

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Wed 1/7

08:00-18:29

1 stop15h 29m

Miami

Wed 15/7

08:00-06:55

2 stops17h 55m

£409

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Fri 20/3

17:00-22:13

2 stops33h 13m

Miami

Tue 24/3

06:40-06:20

2 stops19h 40m

£412

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Fri 20/3

15:35-16:25

2 stops28h 50m

Miami

Sun 29/3

21:45-09:25

1 stop30h 40m

£412

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Wed 18/3

09:50-19:00

1 stop13h 10m

Miami

Sun 5/4

21:20-11:05

Nonstop8h 45m

£412

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 19/5

06:30-14:45

1 stop13h 15m

Miami

Tue 2/6

18:05-08:05

Nonstop9h 00m

£413

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sun 1/3

10:00-13:48

1 stop32h 48m

Miami

Mon 9/3

09:00-11:05

3 stops22h 05m

£414

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 20/1

13:25-11:25

2 stops27h 00m

Miami

Sun 25/1

08:00-06:30

2 stops17h 30m

£417

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 29/1

08:55-17:40

1 stop13h 45m

Miami

Thu 5/2

22:10-11:55

Nonstop8h 45m

£418

Flights are sorted by cheapest return flights first.

Deals found on 6/1

Showing 1-10 of 23 results
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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 2 January 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 7 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 month to book a flight from London Heathrow Airport to Key Largo?

Currently, June is the cheapest month in which you can book a flight from London Heathrow Airport to Key Largo (average of £348). Flying from London Heathrow Airport to Key Largo in July is currently the most expensive (average of £390). 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.

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 7 January 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 7 January 2026.

The most flights from LHR to KE9 are scheduled on a Tuesday (24 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 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 7 January 2026.
Read reviews from past customers who have flown with KLM, Finnair, andVirgin Atlantic 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
7.7
Good
1,434 reviews
Check prices

Food

7.2

Entertainment

7.1

Comfort

7.6

Boarding

7.8

Overall

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,434 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Food

7.2

Entertainment

7.1

Comfort

7.6

Boarding

7.8

Overall

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Finnair
7.6
Good
1,345 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Food

7.2

Entertainment

7.1

Comfort

7.6

Boarding

7.8

Overall

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Virgin Atlantic
7.5
Good
678 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Food

7.2

Entertainment

7.1

Comfort

7.6

Boarding

7.8

Overall

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Air France
7.4
Good
1,519 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Food

7.2

Entertainment

7.1

Comfort

7.6

Boarding

7.8

Overall

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
British Airways
6.7
Okay
7,655 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Food

7.2

Entertainment

7.1

Comfort

7.6

Boarding

7.8

Overall

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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?

    Virgin Atlantic, KLM, and United Airlines can get you from London Heathrow Airport to Key Largo in just under 10h 25m. Your travel time can differ by up to 6h 35m. 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 Norse Atlantic UK (£174), Scandinavian Airlines (£175), and A.P.G. (£215).

  • 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 KLM (88%), Air France (88%) and Delta (88%).

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

    Looking at all options, your cheapest flight can be booked for £321. While the most popular route (London Heathrow - Miami) can be booked for £287 on average, our data indicates £1,630 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.

  • What is the cheapest month to book a flight from London Heathrow Airport to Key Largo?

    Currently, June is the cheapest month in which you can book a flight from London Heathrow Airport to Key Largo (average of £348). Flying from London Heathrow Airport to Key Largo in July is currently the most expensive (average of £390). 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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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 7 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£282Average£410FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
DeltaCheapest£293Average£620FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IcelandairCheapest£295Average£388FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
SWISSCheapest£297Average£368FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Scandinavian AirlinesCheapest£308Average£362FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
LufthansaCheapest£339Average£461FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£342Average£504FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
TAP AIR PORTUGALCheapest£349Average£510FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
British AirwaysCheapest£359Average£496FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£360Average£525FlexibilityNo cancel feeOn-time67%
Search Air Canada 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.

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