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$201+ Cheap flights from Key Largo, FL to Heathrow (LHR)

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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — LHR
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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The best prices from Key Largo to London Heathrow are usually found in February or October, booked 26 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from Key Largo to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Key Largo (KE9) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$445
(Netflights)

One-way from

$201
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$666
From Key Largo to London Heathrow
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One-way flight from Key Largo to London Heathrow
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Highest demand for flights based on searches. 4% potential increase in price ($36 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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Find flight deals from Key Largo to Heathrow

Cheapest flights from Key Largo to Heathrow
Explore the most affordable flight options available from Key Largo to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This Netflights deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/55:40 pmMIA - LHR
1 stop11h 50mVirgin Atlantic
Fri 3/142:00 pmLHR - MIA
Nonstop10h 30mVirgin Atlantic
Deal found 1/21$445
This Delta deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/129:20 pmMIA - LHR
Nonstop8h 40mDelta
Tue 2/2510:00 amLHR - MIA
2 stops16h 11mDelta
Deal found 1/20$457
This KLM deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/253:35 pmMIA - LHR
1 stop11h 20mKLM
Tue 3/412:20 pmLHR - MIA
1 stop14h 22mKLM
Deal found 1/20$466
This British Airways deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/1611:05 pmMIA - LHR
Nonstop8h 25mBritish Airways
Wed 3/262:30 pmLHR - MIA
Nonstop10h 05mBritish Airways
Deal found 1/21$487
This Kiwi.com deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/289:00 pmMIA - LHR
1 stop12h 25mMultiple Airlines
Thu 2/68:15 amLHR - MIA
1 stop15h 30mMultiple Airlines
Deal found 1/20$509
This Aeromexico deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1912:00 pmMIA - LHR
2 stops13h 50mAir France
Sun 2/235:35 pmLHR - MIA
1 stop31h 45mAir France
Deal found 1/20$523
This Mytrip deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/3111:30 pmMIA - LHR
1 stop13h 00mTAP AIR PORTUGAL
Wed 2/128:15 amLHR - MIA
1 stop18h 30mTAP AIR PORTUGAL
Deal found 1/21$536
This Gotogate deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/188:35 pmMIA - LHR
1 stop17h 05mScandinavian Airlines
Tue 3/257:50 pmLHR - MIA
2 stops26h 55mScandinavian Airlines
Deal found 1/19$557
This American Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/232:15 pmMIA - LHR
1 stop11h 25mAmerican Airlines
Wed 4/302:10 pmLHR - MIA
Nonstop9h 45mAmerican Airlines
Deal found 1/21$565
This Cheapflightsfares deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/13:30 pmMIA - LHR
1 stop11h 20mIberia
Wed 10/811:30 amLHR - MIA
1 stop13h 25mIberia
Deal found 1/20$618
This JetBlue deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/241:58 pmMIA - LHR
1 stop14h 32mJetBlue
Tue 2/47:25 amLHR - MIA
1 stop15h 50mJetBlue
Deal found 1/21$630
This United Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/197:00 amMIA - LHR
3 stops19h 10mUnited Airlines
Wed 2/268:55 amLHR - MIA
1 stop13h 35mUnited Airlines
Deal found 1/20$644

Find flights from Key Largo to Heathrow within your budget

Customize your flight search to find flights from Key Largo to Heathrow 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 2,558,603 searches. Data last updated January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

MiamiLondon

MIA - LHR

MIALHR

Miami

Wed 3/5

5:05 pm-6:45 am

Nonstop8h 40m

London Heathrow

Fri 3/14

2:00 pm-8:30 pm

Nonstop10h 30m

$445

MiamiLondon

MIA - LHR

MIALHR

Miami

Thu 3/6

9:20 pm-11:00 am

Nonstop8h 40m

London Heathrow

Tue 3/18

6:30 am-3:45 pm

1 stop13h 15m

$447

MiamiLondon

MIA - LHR

MIALHR

Miami

Fri 2/7

10:05 pm-11:30 am

Nonstop8h 25m

London Heathrow

Mon 2/17

2:30 pm-7:35 pm

Nonstop10h 05m

$450

MiamiLondon

MIA - LHR

MIALHR

Miami

Tue 2/25

3:35 pm-7:55 am

1 stop11h 20m

London Heathrow

Tue 3/4

12:20 pm-9:42 pm

1 stop14h 22m

$466

MiamiLondon

MIA - LHR

MIALHR

Miami

Mon 3/10

5:30 pm-8:05 pm

2 stops22h 35m

London Heathrow

Mon 3/17

9:55 am-3:45 pm

2 stops33h 50m

$520

MiamiLondon

MIA - LHR

MIALHR

Miami

Wed 2/19

12:00 pm-6:50 am

2 stops13h 50m

London Heathrow

Sun 2/23

5:35 pm-8:20 pm

1 stop31h 45m

$523

MiamiLondon

MIA - LHR

MIALHR

Miami

Sun 3/9

12:45 am-5:30 pm

1 stop12h 45m

London Heathrow

Mon 3/17

6:30 pm-3:45 pm

1 stop25h 15m

$528

MiamiLondon

MIA - LHR

MIALHR

Miami

Tue 3/18

8:35 pm-5:40 pm

1 stop17h 05m

London Heathrow

Tue 3/25

7:50 pm-6:45 pm

2 stops26h 55m

$557

MiamiLondon

MIA - LHR

MIALHR

Miami

Wed 4/23

2:15 pm-6:40 am

1 stop11h 25m

London Heathrow

Wed 4/30

2:10 pm-6:55 pm

Nonstop9h 45m

$565

MiamiLondon

MIA - LHR

MIALHR

Miami

Wed 2/19

7:00 am-7:10 am

3 stops19h 10m

London Heathrow

Wed 2/26

8:55 am-5:30 pm

1 stop13h 35m

$644

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 21 results
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2
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Best time to book a flight from Key Largo to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Key Largo with our price prediction graph.
Estimated round-trip 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.

Travel insights for flights from Key Largo to Heathrow

Get recent, data-driven insights about flights from Key Largo to Heathrow including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Heathrow. Price data was last updated on January 17, 2025.

Booking 26 days in advance of your planned departure date is, on average, the best time to get cheap flights from Key Largo to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, November is the cheapest month in which you can book a flight from Key Largo to London Heathrow Airport (average of $661). Flying from Key Largo to London Heathrow Airport in June is currently the most expensive (average of $1,137). 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 KE9 to LHR?

Find hourly flight availability from Key Largo to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.

When flying from Key Largo to London Heathrow Airport, 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 Key Largo to London Heathrow Airport?

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

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

Weekly flight availability from Key Largo to London Heathrow Airport

Explore weekly flight availability from Key Largo to Heathrow. 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 January 21, 2025.

The most flights from KE9 to LHR are scheduled on a Monday (35 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (29 on average).

Rainfall in Heathrow by month

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

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

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

If weather is an important factor for your trip to London Heathrow Airport, 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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated January 21, 2025.
See what other customers who have flown with United Airlines, Delta and British Airways from Key Largo to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,521 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,341 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair
7.6
Good
1,286 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS
7.5
Good
1,600 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic
7.5
Good
665 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Heathrow. 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 Key Largo to London Heathrow Airport one-way?

    To fly one-way, consider booking your trip with JetBlue, which is currently one of the cheapest options available, starting at $267. SWISS flights start at $291 while deals on British Airways start at $311 one-way.

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

    Before booking your flight to London Heathrow Airport from Key Largo, check out the most reliable airlines to get you to your destination on time: Malaysia Airlines (63%), SriLankan Airlines (58%), Gulf Air( 58%).

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

    While on average a flight from Key Largo to London Heathrow Airport is generally $2,366, our data shows the cheapest flight currently is $312. When looking at the most popular route, (Miami - London Heathrow), you can expect to pay $409 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Key Largo to Heathrow 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 Key Largo to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Key Largo to London Heathrow Airport (average of $661). Flying from Key Largo to London Heathrow Airport in June is currently the most expensive (average of $1,137). 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

Traveling to a place near Key Largo?

Book flights to Key Largo if you plan to visit one of these locations
Hayes
Hounslow
Thornton Heath
Harrow
Luton
Wembley
Canterbury
Northampton
Gatwick
Horley
Milton Keynes
Dover
Orpington
Watford
Stratford-upon-Avon
Croydon
Borehamwood
Bromley
Folkestone
Ilford

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Top 10 airlines flying from Key Largo to Heathrow

Discover the top 10 airlines that operate flights from Key Largo to Heathrow. 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 2,558,603 searches. Data last updated January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$203Average$595FlexibilityNo cancel feeOn-time77%
Norse Atlantic UKCheapest$284Average$536FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$369Average$664FlexibilityNo cancel feeOn-time67%
Virgin AtlanticCheapest$431Average$705FlexibilityNo cancel feeOn-time72%
TAP AIR PORTUGALCheapest$452Average$766FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$455Average$754FlexibilityNo cancel feeOn-time76%
SWISSCheapest$468Average$563FlexibilityNo cancel feeOn-time79%
DeltaCheapest$486Average$798FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$513Average$742FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$527Average$979FlexibilityNo cancel feeOn-time62%
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