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$182+ 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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — LON
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to London are usually found in February or January, booked 27 days in advance, depart on a Wednesday or Thursday and return on a Monday

Find 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 October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Fri 11/2811:35 pmMIA - LGW
1 stop29h 15mTAP AIR PORTUGAL
Fri 12/510:40 amLGW - MIA
1 stop15h 40mTAP AIR PORTUGAL
Deal found 10/30$536
This Mytrip deal was found by Cheapflights users on 10/30. 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 11/284:40 pmMIA - LGW
2 stops21h 10mMultiple Airlines
Fri 12/59:40 amLGW - MIA
2 stops34h 00mMultiple Airlines
Deal found 10/30$539
This FlightHub deal was found by Cheapflights users on 10/30. 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.
Fri 11/75:15 pmMIA - LGW
1 stop12h 40mIcelandair
Tue 11/1811:55 amLGW - MIA
1 stop14h 00mIcelandair
Deal found 10/30$542
This Mytrip deal was found by Cheapflights users on 10/28. 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.
Thu 11/2712:41 pmMIA - LGW
2 stops17h 14mMultiple Airlines
Thu 12/48:30 amLGW - MIA
1 stop15h 25mMultiple Airlines
Deal found 10/28$543
This Mytrip deal was found by Cheapflights users on 10/30. 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.
Thu 12/44:35 pmMIA - STN
2 stops17h 00mMultiple Airlines
Wed 12/108:40 pmSTN - MIA
2 stops22h 50mMultiple Airlines
Deal found 10/30$544
This Gotogate deal was found by Cheapflights users on 10/29. 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.
Fri 11/145:15 pmMIA - LHR
1 stop12h 35mIcelandair
Sat 11/2212:15 pmLHR - MIA
1 stop13h 40mIcelandair
Deal found 10/29$545
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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.
Tue 12/24:35 pmMIA - LGW
1 stop12h 15mTAP AIR PORTUGAL
Wed 12/109:35 amLGW - MIA
2 stops33h 55mTAP AIR PORTUGAL
Deal found 10/30$545
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Sat 11/1510:15 pmMIA - LGW
1 stop26h 45mMultiple Airlines
Wed 11/197:25 pmLGW - MIA
1 stop28h 30mMultiple Airlines
Deal found 10/30$546
This FlightHub deal was found by Cheapflights users on 10/28. 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.
Sun 11/911:50 pmMIA - LHR
1 stop17h 50mTAP AIR PORTUGAL
Wed 11/196:00 amLHR - MIA
1 stop13h 50mTAP AIR PORTUGAL
Deal found 10/28$547
This FlightHub deal was found by Cheapflights users on 10/29. 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.
Wed 11/1211:35 pmMIA - LGW
2 stops29h 25mTAP AIR PORTUGAL
Wed 11/1910:40 amLGW - MIA
1 stop16h 10mTAP AIR PORTUGAL
Deal found 10/29$547
This FlightHub deal was found by Cheapflights users on 10/28. 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.
Wed 11/55:15 pmMIA - LHR
1 stop21h 15mIcelandair
Fri 11/148:35 pmLHR - MIA
1 stop29h 20mIcelandair
Deal found 10/28$548
This Booking.com deal was found by Cheapflights users on 10/30. 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.
Wed 12/311:35 pmMIA - LGW
2 stops29h 25mTAP AIR PORTUGAL
Wed 12/104:35 pmLGW - MIA
1 stop26h 55mTAP AIR PORTUGAL
Deal found 10/30$548

Cheap 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 October 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$536
(Justfly.com)

One-way from

$182
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$642
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. 9% potential increase in price ($68 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 30, 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

Thu 12/4

4:35 pm-2:35 pm

2 stops17h 00m

London Stansted

Wed 12/10

8:40 pm-2:30 pm

2 stops22h 50m

$544

MiamiLondon

MIA - LGW

MIALGW

Miami

Wed 11/12

11:35 pm-10:00 am

2 stops29h 25m

London Gatwick

Wed 11/19

9:35 am-9:50 pm

2 stops17h 15m

$580

MiamiLondon

MIA - STN

MIASTN

Miami

Wed 11/26

7:50 pm-5:30 pm

2 stops16h 40m

London Stansted

Mon 12/1

10:55 am-5:30 pm

2 stops35h 35m

$585

MiamiLondon

MIA - STN

MIASTN

Miami

Wed 12/3

11:35 pm-6:10 pm

1 stop13h 35m

London Stansted

Wed 12/10

6:30 am-9:50 pm

1 stop20h 20m

$585

MiamiLondon

MIA - STN

MIASTN

Miami

Tue 11/25

6:45 pm-11:10 pm

2 stops23h 25m

London Stansted

Tue 12/2

6:05 pm-2:40 pm

2 stops25h 35m

$587

MiamiLondon

MIA - LHR

MIALHR

Miami

Sat 1/17

7:40 am-4:00 pm

2 stops27h 20m

London Heathrow

Thu 1/22

9:55 am-6:35 pm

1 stop13h 40m

$589

MiamiLondon

MIA - LGW

MIALGW

Miami

Fri 2/13

5:15 pm-10:55 am

1 stop12h 40m

London Gatwick

Thu 2/19

11:55 am-8:55 pm

1 stop14h 00m

$605

MiamiLondon

MIA - STN

MIASTN

Miami

Fri 11/28

12:25 pm-12:10 am

3 stops30h 45m

London Stansted

Fri 12/5

8:05 am-10:29 pm

2 stops19h 24m

$605

MiamiLondon

MIA - LHR

MIALHR

Miami

Thu 12/4

6:00 am-7:10 am

2 stops20h 10m

London Heathrow

Wed 12/10

6:35 am-4:55 pm

1 stop15h 20m

$608

MiamiLondon

MIA - LGW

MIALGW

Miami

Tue 3/3

4:35 pm-3:45 pm

1 stop18h 10m

London Gatwick

Wed 3/11

4:35 pm-3:30 pm

1 stop26h 55m

$610

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

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 October 24, 2025.

Booking 27 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 June is currently the most expensive (average of $493). 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 October 30, 2025.

It’s optimal to fly from Key Largo to London in the afternoon. By choosing this option you can save up to 17% 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.

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 October 30, 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
7,993 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

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
7,993 reviews
Delta
7.9
Good
7,993 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

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
670 reviews
Delta
7.9
Good
7,993 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

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
11,033 reviews
Delta
7.9
Good
7,993 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

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
7,993 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

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
7,487 reviews
Delta
7.9
Good
7,993 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

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 $605, TAP AIR PORTUGAL can have you in London from Key Largo in 12h 40m. The distance between Key Largo and London is about 4430 mi. This flight may include one or multiple stops.

  • 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 KLM (92%), Air France (92%) and Delta (92%).

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

    The cheapest flight price from Key Largo to London is $421. On average you can expect to pay $2,656. The most popular route, (Miami - London Heathrow), can usually be booked for $348.

  • 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 June is currently the most expensive (average of $493). 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
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Alternative routes for Key Largo to London

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$750FlexibilityNo cancel feeOn-time62%
Scandinavian AirlinesCheapest$203Average$578FlexibilityNo cancel feeOn-time77%
Norse Atlantic UKCheapest$350Average$564FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$358Average$740FlexibilityNo cancel feeOn-time70%
Air CanadaCheapest$432Average$611FlexibilityNo cancel feeOn-time67%
DeltaCheapest$461Average$741FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$479Average$759FlexibilityNo cancel feeOn-time72%
FinnairCheapest$512Average$877FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$519Average$803FlexibilityNo cancel feeOn-time71%
TAP AIR PORTUGALCheapest$532Average$740FlexibilityNo cancel feeOn-timeN/A

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