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$370+ Cheap flights from Key Largo, FL to London (LON)

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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — LON
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to London are usually found in February or March, booked 42 days in advance, depart on a Wednesday or Thursday and return on a Monday

Cheap flight deals from Key Largo to London

Cheapest flights from Key Largo to London
Explore the most affordable flight options available from Key Largo to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Wed 12/312:25 pmMIA - LHR
1 stop13h 00mLufthansa
Tue 1/137:40 amLHR - MIA
1 stop14h 15mLufthansa
Deal found 12/15$610
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Wed 12/312:25 pmMIA - LHR
1 stop13h 00mLufthansa
Wed 1/147:40 amLHR - MIA
1 stop14h 15mLufthansa
Deal found 12/15$611
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Wed 12/3112:00 pmMIA - LHR
1 stop12h 55mMultiple Airlines
Tue 1/136:00 amLHR - MIA
1 stop13h 40mMultiple Airlines
Deal found 12/15$624
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Wed 12/3112:00 pmMIA - LHR
1 stop14h 55mAustrian Airlines
Fri 1/96:00 pmLHR - MIA
1 stop31h 32mAustrian Airlines
Deal found 12/16$645
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Wed 12/318:30 amMIA - LHR
1 stop18h 55mAustrian Airlines
Fri 1/1612:00 pmLHR - MIA
1 stop13h 29mAustrian Airlines
Deal found 12/15$646
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Mon 12/2912:00 pmMIA - LHR
1 stop14h 55mMultiple Airlines
Wed 1/147:40 amLHR - MIA
1 stop14h 15mMultiple Airlines
Deal found 12/15$648
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Wed 12/318:30 amMIA - LHR
1 stop18h 55mAustrian Airlines
Thu 1/1512:00 pmLHR - MIA
1 stop13h 29mAustrian Airlines
Deal found 12/15$655
This KLM deal was found by Cheapflights users on 12/15. 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.
Wed 12/315:10 pmMIA - LHR
Nonstop8h 50mKLM
Tue 1/136:30 amLHR - MIA
1 stop13h 20mKLM
Deal found 12/15$656
This FlightHub deal was found by Cheapflights users on 12/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:00 amMIA - LHR
2 stops31h 35mMultiple Airlines
Wed 1/147:40 amLHR - MIA
1 stop14h 15mMultiple Airlines
Deal found 12/15$658
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Tue 12/301:33 pmMIA - LHR
1 stop12h 57mUnited Airlines
Tue 1/131:45 pmLHR - MIA
1 stop29h 55mUnited Airlines
Deal found 12/15$660
This Air Canada deal was found by Cheapflights users on 12/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:00 amMIA - LHR
2 stops20h 20mAir Canada
Tue 1/136:50 amLHR - MIA
2 stops20h 39mAir Canada
Deal found 12/15$661
This CrystalTravel deal was found by Cheapflights users on 12/17. 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.
Wed 12/245:15 pmMIA - LHR
1 stop12h 35mIcelandair
Sat 1/2412:15 pmLHR - MIA
1 stop13h 40mIcelandair
Deal found 12/17$662

Find flight deals from Key Largo to London

Keep the following information in mind while searching for Key Largo to London flight deals. Data was last updated December 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$590
(Booking.com)

One-way from

$370
(Mytrip)

Popular in

December

Cheapest in

February

Average price

$927
Provider with most accurate pricing for Miami-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Miami-London (LON) flights.
Search Deals
From Key Largo to London (LON)
Search Deals
One-way flight from Key Largo to London (LON)
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($92 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to London 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 December 18, 2025.
Use the filters below to find and compare flights from Key Largo to London that are best for you.

Fly from

Key Largo

Fly to

London

Route

Depart

Return

Price

MiamiLondon

MIA - STN

MIASTN

Miami

Fri 1/23

7:25 am-10:35 pm

3 stops34h 10m

London Stansted

Fri 1/30

7:30 am-10:29 pm

2 stops19h 59m

$592

MiamiLondon

MIA - LGW

MIALGW

Miami

Thu 2/19

9:45 pm-4:25 pm

1 stop13h 40m

London Gatwick

Mon 2/23

10:00 am-7:30 pm

1 stop14h 30m

$593

MiamiLondon

MIA - LGW

MIALGW

Miami

Thu 2/19

9:45 pm-4:25 pm

1 stop13h 40m

London Gatwick

Tue 2/24

10:00 am-7:30 pm

1 stop14h 30m

$593

MiamiLondon

MIA - LTN

MIALTN

Miami

Tue 3/3

7:40 pm-9:05 pm

1 stop20h 25m

London Luton

Tue 3/17

9:25 am-9:55 pm

1 stop16h 30m

$601

MiamiLondon

MIA - STN

MIASTN

Miami

Wed 2/18

9:45 pm-7:40 pm

1 stop16h 55m

London Stansted

Wed 3/4

5:55 am-7:30 pm

1 stop18h 35m

$602

MiamiLondon

MIA - STN

MIASTN

Miami

Fri 2/6

9:45 pm-6:30 pm

1 stop15h 45m

London Stansted

Tue 2/17

9:20 pm-8:00 pm

1 stop27h 40m

$606

MiamiLondon

MIA - LHR

MIALHR

Miami

Fri 2/13

6:40 pm-8:35 am

Nonstop8h 55m

London Heathrow

Sun 2/22

4:15 pm-4:50 pm

1 stop29h 35m

$613

MiamiLondon

MIA - LHR

MIALHR

Miami

Tue 2/24

10:00 pm-11:30 am

Nonstop8h 30m

London Heathrow

Tue 3/3

6:10 pm-4:50 pm

1 stop27h 40m

$613

MiamiLondon

MIA - LHR

MIALHR

Miami

Tue 1/13

1:45 pm-6:40 am

1 stop11h 55m

London Heathrow

Tue 1/20

9:00 am-5:30 pm

1 stop13h 30m

$614

MiamiLondon

MIA - LHR

MIALHR

Miami

Mon 1/26

5:10 pm-7:00 am

Nonstop8h 50m

London Heathrow

Tue 2/10

6:30 am-2:50 pm

1 stop13h 20m

$615

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

Showing 1-10 of 60 results
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Best time to book a flight from Key Largo to London

Have a flexible travel schedule? Discover the best time to fly to London 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.

Cheapflights Insights

Everything you need to know about your flight from Key Largo to London

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

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to London. Price data was last updated on December 12, 2025.

Booking 42 days in advance of your planned departure date is, on average, the best time to get cheap flights from Key Largo to London. 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?

Currently, January is the cheapest month in which you can book a flight from Key Largo to London (average of $286). Flying from Key Largo to London in December is currently the most expensive (average of $590). 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 LON?

Find hourly flight availability from Key Largo to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

It’s optimal to fly from Key Largo to London in the afternoon. By choosing this option you can save up to 20% on the cost of your flight, compared to a flight in the morning.

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

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

Travelers seeking maximum savings on their Key Largo to London flight should consider departing on Wednesday mornings when fares are most often at their lowest. Saturday 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

Explore weekly flight availability from Key Largo to London. 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 December 18, 2025.

The most flights from KE9 to LON are scheduled on a Monday (25 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (18 on average).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated December 18, 2025.
See what other customers who have flown with Delta, Virgin Atlantic, and American Airlines 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
7.9
Good
8,006 reviews

Entertainment

7.9

Food

7.3

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Delta
7.9
Good
8,006 reviews
Delta
7.9
Good
8,006 reviews

Entertainment

7.9

Food

7.3

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Virgin Atlantic
7.5
Good
675 reviews
Delta
7.9
Good
8,006 reviews

Entertainment

7.9

Food

7.3

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
American Airlines
7.2
Good
11,053 reviews
Delta
7.9
Good
8,006 reviews

Entertainment

7.9

Food

7.3

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Norse Atlantic UK
7.2
Good
Delta
7.9
Good
8,006 reviews

Entertainment

7.9

Food

7.3

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
British Airways
6.7
Okay
7,583 reviews
Delta
7.9
Good
8,006 reviews

Entertainment

7.9

Food

7.3

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

Related info for your journey

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

    For as low as $613, Air Europa can have you in London from Key Largo in 8h 55m. The distance between Key Largo and London is about 4414 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Key Largo to London one-way?

    One-way options have recently been found by users for as low as $139 on Norse Atlantic UK. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $163 and A.P.G. from $253 one-way.

  • What are the most popular routes from Key Largo to London?

    The most popular route from Key Largo to London is Miami - London Heathrow. You may also consider Miami - London Gatwick or Miami - London City.

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

    The top 3 most reliable airlines when flying from Key Largo to London are Air France (88%), Delta (88%) and Virgin Atlantic (88%).

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

    The cheapest flight price from Key Largo to London is $341. On average you can expect to pay $2,656. The most popular route, (Miami - London Heathrow), can usually be booked for $390.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Key Largo to London (average of $286). Flying from Key Largo to London in December is currently the most expensive (average of $590). 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 London?

Book flights to London if you plan to visit one of these locations
Ilford
Hounslow
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Winchester
Croydon
Orpington
Watford
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Horley
Kingston upon Thames
Wembley
Folkestone
Eastbourne

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Top 10 airlines flying from Key Largo to London

Discover the top 10 airlines that operate flights from Key Largo to London. 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$744FlexibilityNo cancel feeOn-time62%
Norse Atlantic UKCheapest$347Average$583FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$358Average$718FlexibilityNo cancel feeOn-time70%
Scandinavian AirlinesCheapest$456Average$578FlexibilityNo cancel feeOn-time77%
DeltaCheapest$461Average$739FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$467Average$720FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$472Average$757FlexibilityNo cancel feeOn-time72%
FinnairCheapest$515Average$877FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$518Average$798FlexibilityNo cancel feeOn-time71%
IberiaCheapest$534Average$776FlexibilityNo cancel feeOn-time77%

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