Heathrow

$257+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — LHR
feb. 25 — mar. 41
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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

Keep the following information in mind while searching for Key Largo to Heathrow flight deals. Data was last updated febrero 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$478
(SWISS)

One-way from

$257
(Kissandfly.com)

Popular in

December

Cheapest in

February

Average price

$537
Provider with most accurate pricing for Miami-London (LON) flight deals.
Provider most trusted by Cheapflights users for Miami-London (LON) flights.
From Key Largo to London Heathrow
One-way flight from Key Largo to London Heathrow
Highest demand for flights based on searches. 5% potential increase in price ($42 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
Average for round-trip flights in February 2025

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 febrero 20, 2025.

This SWISS deal was found by Cheapflights users on 2/20. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/47:50 pmMIA - LHR
1 stop15h 30mSWISS
mar. 4/16:00 amLHR - MIA
1 stop13h 10mSWISS
Deal found 2/20$478
This eDestinos deal was found by Cheapflights users on 2/20. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/144:30 pmMIA - LHR
1 stop12h 50mTAP AIR PORTUGAL
mié. 10/2211:20 amLHR - MIA
1 stop15h 30mTAP AIR PORTUGAL
Deal found 2/20$525
This Booking.com deal was found by Cheapflights users on 2/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/267:45 pmMIA - LHR
1 stop32h 10mScandinavian Airlines
dom. 12/76:40 pmLHR - MIA
1 stop28h 15mScandinavian Airlines
Deal found 2/20$570
This eDestinos deal was found by Cheapflights users on 2/20. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/148:55 pmMIA - LHR
Nonstop8h 40mBritish Airways
mié. 10/228:45 amLHR - MIA
1 stop13h 10mBritish Airways
Deal found 2/20$573
This CrystalTravel deal was found by Cheapflights users on 2/20. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 4/57:15 pmMIA - LHR
2 stops30h 20mMultiple Airlines
lun. 4/218:40 amLHR - MIA
1 stop34h 35mMultiple Airlines
Deal found 2/20$613
This Booking.com deal was found by Cheapflights users on 2/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/197:50 pmMIA - LHR
1 stop11h 35mAer Lingus
vie. 3/288:50 amLHR - MIA
1 stop13h 10mAer Lingus
Deal found 2/20$619
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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.
mié. 3/128:55 pmMIA - LHR
Nonstop8h 45mIberia
mié. 3/1911:25 amLHR - MIA
1 stop14h 05mIberia
Deal found 2/20$627
This Gotogate deal was found by Cheapflights users on 2/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 3/296:05 pmMIA - LHR
1 stop31h 25mAir Canada
vie. 4/119:30 amLHR - MIA
1 stop12h 43mAir Canada
Deal found 2/20$632
This JetBlue deal was found by Cheapflights users on 2/20. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/46:00 amMIA - LHR
1 stop18h 55mJetBlue
lun. 3/318:15 amLHR - MIA
1 stop13h 35mJetBlue
Deal found 2/20$636
This United Airlines deal was found by Cheapflights users on 2/20. 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.
lun. 3/105:48 pmMIA - LHR
1 stop11h 22mUnited Airlines
mar. 3/258:55 amLHR - MIA
1 stop13h 35mUnited Airlines
Deal found 2/20$642
This Booking.com deal was found by Cheapflights users on 2/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 3/96:00 pmMIA - LHR
Nonstop8h 45mVirgin Atlantic
mar. 3/259:40 amLHR - MIA
Nonstop10h 30mVirgin Atlantic
Deal found 2/20$644
This Delta deal was found by Cheapflights users on 2/20. 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.
mié. 4/2310:30 pmMIA - LHR
Nonstop8h 45mDelta
mar. 4/296:30 amLHR - MIA
1 stop12h 25mDelta
Deal found 2/20$650

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 febrero 20, 2025.

Fly from

Key Largo

Fly to

Heathrow

Route

Depart

Return

Price

MiamiLondon

MIA - LHR

MIALHR

Miami

mar. 3/4

7:50 pm-4:20 pm

1 stop15h 30m

London Heathrow

mar. 4/1

6:00 am-2:10 pm

1 stop13h 10m

$478

MiamiLondon

MIA - LHR

MIALHR

Miami

lun. 3/10

5:30 pm-10:40 pm

1 stop25h 10m

London Heathrow

mar. 3/25

6:00 am-3:45 pm

1 stop13h 45m

$528

MiamiLondon

MIA - LHR

MIALHR

Miami

lun. 3/24

6:33 pm-9:20 am

1 stop10h 47m

London Heathrow

mar. 4/8

1:10 pm-9:30 pm

1 stop13h 20m

$597

MiamiLondon

MIA - LHR

MIALHR

Miami

sáb. 4/5

7:15 pm-6:35 am

2 stops30h 20m

London Heathrow

lun. 4/21

8:40 am-2:15 pm

1 stop34h 35m

$613

MiamiLondon

MIA - LHR

MIALHR

Miami

mié. 3/19

7:50 pm-11:25 am

1 stop11h 35m

London Heathrow

vie. 3/28

8:50 am-6:00 pm

1 stop13h 10m

$619

MiamiLondon

MIA - LHR

MIALHR

Miami

mié. 3/12

8:55 pm-9:40 am

Nonstop8h 45m

London Heathrow

mié. 3/19

11:25 am-9:30 pm

1 stop14h 05m

$627

MiamiLondon

MIA - LHR

MIALHR

Miami

sáb. 3/29

6:05 pm-5:30 am

1 stop31h 25m

London Heathrow

vie. 4/11

9:30 am-5:13 pm

1 stop12h 43m

$632

MiamiLondon

MIA - LHR

MIALHR

Miami

mar. 3/4

6:00 am-5:55 am

1 stop18h 55m

London Heathrow

lun. 3/31

8:15 am-4:50 pm

1 stop13h 35m

$636

MiamiLondon

MIA - LHR

MIALHR

Miami

lun. 3/10

5:48 pm-9:10 am

1 stop11h 22m

London Heathrow

mar. 3/25

8:55 am-6:30 pm

1 stop13h 35m

$642

MiamiLondon

MIA - LHR

MIALHR

Miami

dom. 3/9

6:00 pm-6:45 am

Nonstop8h 45m

London Heathrow

mar. 3/25

9:40 am-4:10 pm

Nonstop10h 30m

$644

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 28 results
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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 February 14, 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 $1,136). 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 febrero 20, 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 febrero 20, 2025.

The most flights from KE9 to LHR are scheduled on a Wednesday (35 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (34 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 febrero 20, 2025.
See what other customers who have flown with Delta, Finnair and SWISS 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.
8.0
Very good

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

8.0
Very good
8.0
Very good

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

8.0
Very good

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

8.0
Very good

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

8.0
Very good

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

8.0
Very good

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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 $274. Icelandair flights start at $294 while deals on Iberia start at $298 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: Singapore Airlines (69%), SriLankan Airlines (69%), Gulf Air( 69%).

  • 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 $2,347, our data shows the cheapest flight currently is $338. When looking at the most popular route, (Miami - London Heathrow), you can expect to pay $523 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 $1,136). 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
Hounslow
Hayes
Thornton Heath
Harrow
Luton
Wembley
Horley
Canterbury
Northampton
Gatwick
Milton Keynes
Dover
Orpington
Watford
Stratford-upon-Avon
Croydon
Borehamwood
Bromley
Folkestone
Ilford

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Alternative routes for Key Largo to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

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 febrero 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$203Average$614FlexibilityNo cancel feeOn-time77%
Norse Atlantic UKCheapest$324Average$541FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$369Average$658FlexibilityNo cancel feeOn-time67%
TAP AIR PORTUGALCheapest$452Average$734FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$455Average$708FlexibilityNo cancel feeOn-time72%
FinnairCheapest$455Average$745FlexibilityNo cancel feeOn-time76%
SWISSCheapest$468Average$563FlexibilityNo cancel feeOn-time79%
DeltaCheapest$486Average$801FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$513Average$744FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$527Average$876FlexibilityNo cancel feeOn-time62%
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