Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Key Largo from £194

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 26/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — MIA
20 Apr — 27 Apr1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Key Largo are usually found in September or November, booked 40 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 15 April 2025.

Round-trip from

£368

One-way from

£194

Popular in

August

Cheapest in

September

Average price

£533
KLM
  • KLM
  • 28/4-14/5
  • Nonstop
  • 18h 25m total
  • London to Key Largo
26/4
  • 26/4
  • 1 total stop
  • 18h 10m total
  • London to Key Largo
Highest demand for flights based on searches. 11% potential increase in price (£51 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Average for round-trip flights in April 2025

Find flight deals from Heathrow to Key Largo

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 15 April 2025.

Mon 28/415:55LHR - MIA
Nonstop9h 40mKLM
Wed 14/522:30MIA - LHR
Nonstop8h 45mKLM
Deal found 15/4£368
Fri 2/509:30LHR - MIA
1 stop18h 53mAir Canada
Tue 13/514:15MIA - LHR
1 stop11h 15mAir Canada
Deal found 14/4£369
Fri 9/506:30LHR - MIA
1 stop13h 10mLufthansa
Sat 24/517:19MIA - LHR
1 stop22h 21mLufthansa
Deal found 14/4£381
Wed 7/508:40LHR - MIA
1 stop13h 50mMultiple Airlines
Mon 19/513:57MIA - LHR
1 stop11h 48mMultiple Airlines
Deal found 15/4£382
Mon 28/415:55LHR - MIA
Nonstop9h 40mVirgin Atlantic
Wed 14/519:25MIA - LHR
Nonstop9h 00mVirgin Atlantic
Deal found 14/4£387
Fri 25/412:15LHR - MIA
Nonstop9h 40mBritish Airways
Tue 29/418:29MIA - LHR
1 stop10h 51mBritish Airways
Deal found 15/4£392
Wed 30/408:40LHR - MIA
1 stop13h 50mUnited Airlines
Tue 6/512:27MIA - LHR
1 stop12h 28mUnited Airlines
Deal found 14/4£396
Mon 28/410:45LHR - MIA
Nonstop10h 00mDelta
Wed 14/519:25MIA - LHR
Nonstop9h 00mDelta
Deal found 15/4£414
Mon 5/511:30LHR - MIA
1 stop13h 45mAmerican Airlines
Thu 22/521:20MIA - LHR
Nonstop8h 45mAmerican Airlines
Deal found 14/4£416
Sat 8/1112:15LHR - MIA
1 stop13h 40mIcelandair
Fri 21/1117:15MIA - LHR
1 stop12h 35mIcelandair
Deal found 14/4£432
Sat 15/1114:20LHR - MIA
Nonstop10h 25mAir France
Thu 27/1121:35MIA - LHR
Nonstop8h 50mAir France
Deal found 15/4£440
Mon 28/412:15LHR - MIA
Nonstop9h 40mFinnair
Wed 14/514:31MIA - LHR
1 stop10h 49mFinnair
Deal found 14/4£442

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 15 April 2025.
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

Mon 28/4

15:55-20:35

Nonstop9h 40m

Miami

Wed 14/5

22:30-12:15

Nonstop8h 45m

£368

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Fri 2/5

09:30-23:23

1 stop18h 53m

Miami

Tue 13/5

14:15-06:30

1 stop11h 15m

£369

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Fri 9/5

06:30-14:40

1 stop13h 10m

Miami

Sat 24/5

17:19-20:40

1 stop22h 21m

£381

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Wed 7/5

08:40-17:30

1 stop13h 50m

Miami

Mon 19/5

13:57-06:45

1 stop11h 48m

£382

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 28/4

15:55-20:35

Nonstop9h 40m

Miami

Wed 14/5

19:25-09:25

Nonstop9h 00m

£387

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Fri 25/4

12:15-16:55

Nonstop9h 40m

Miami

Tue 29/4

18:29-10:20

1 stop10h 51m

£392

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Wed 30/4

08:40-17:30

1 stop13h 50m

Miami

Mon 5/5

17:00-11:35

1 stop13h 35m

£396

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 28/4

10:45-15:45

Nonstop10h 00m

Miami

Wed 14/5

19:25-09:25

Nonstop9h 00m

£414

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 5/5

11:30-20:15

1 stop13h 45m

Miami

Thu 22/5

21:20-11:05

Nonstop8h 45m

£416

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sat 6/9

19:50-22:10

1 stop31h 20m

Miami

Fri 3/10

00:25-17:45

1 stop12h 20m

£441

Flights are sorted by cheapest return flights first.

Deals found on 15/4

Showing 1-10 of 19 results
1
2

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 11 April 2025.

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 40 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to Key Largo (average of £559). Flying from London Heathrow Airport to Key Largo in July is currently the most expensive (average of £760). 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 15 April 2025.

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.

What is the cheapest day to fly from London Heathrow Airport to Key Largo?

Use this chart to determine the cheapest time to fly return from Heathrow to Key Largo. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London Heathrow Airport to Key Largo flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 15 April 2025.

The most flights from LHR to KE9 are scheduled on a Monday (26 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (21 on average).

Rainfall in Key Largo by month

Plan your trip to Key Largo by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Key Largo ranges from 41.0 - 252.0 inches per month. September is typically the wettest month, when rainfall can reach 252.0 mm. January is typically the driest time to visit Key Largo when rainfall is around 41.0 mm.

Temperature in Key Largo by month

Plan your trip to Key Largo by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Key Largo, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 20.0 C).

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 15 April 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Finnair from London to Key Largo to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
8.0
Very Good

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

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.
  • 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 Vueling (£247), TAP AIR PORTUGAL (£263), and Aer Lingus (£365).

  • 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 (92%), Singapore Airlines (84%) and Air France (83%).

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

    Looking at all options, your cheapest flight can be booked for £394. While the most popular route (London Heathrow - Miami) can be booked for £375 on average our data indicates £1,886 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to Key Largo (average of £559). Flying from London Heathrow Airport to Key Largo in July is currently the most expensive (average of £760). 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

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.

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 15 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£295Average£431FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
DeltaCheapest£312Average£530FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£347Average£513FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£350Average£479FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
SWISSCheapest£351Average£378FlexibilityNo cancel feeOn-time79%
Search SWISS flights
LufthansaCheapest£354Average£473FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air FranceCheapest£365Average£534FlexibilityNo cancel feeOn-time77%
Search Air France flights
IcelandairCheapest£367Average£728FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
KLMCheapest£373Average£519FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air CanadaCheapest£380Average£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.

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.