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$163+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — LON
oct. 15 — oct. 221
mié. 10/15
mié. 10/22
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 63 days in advance, depart on a Wednesday or Thursday and return on a Monday

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 septiembre 15, 2025.

Round-trip from

$443
(FlightHub)

One-way from

$163
(oojo)

Popular in

December

Cheapest in

February

Average price

$586
From Key Largo to London (LON)
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One-way flight from Key Largo to London (LON)
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Highest demand for flights based on searches. 9% potential increase in price ($62 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 September 2025
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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 septiembre 15, 2025.

This Justfly.com deal was found by Cheapflights users on 9/14. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/511:35 pmMIA - LGW
1 stop29h 15mTAP AIR PORTUGAL
jue. 11/204:00 pmLGW - MIA
1 stop34h 20mTAP AIR PORTUGAL
Deal found 9/14$443
This Mytrip deal was found by Cheapflights users on 9/13. 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.
mié. 11/54:40 pmMIA - STN
2 stops20h 10mMultiple Airlines
mar. 11/119:45 pmSTN - MIA
2 stops27h 31mMultiple Airlines
Deal found 9/13$445
This eDestinos deal was found by Cheapflights users on 9/13. 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.
lun. 9/227:35 pmMIA - LHR
Nonstop8h 50mBritish Airways
mar. 9/309:55 amLHR - MIA
Nonstop9h 30mBritish Airways
Deal found 9/13$446
This TAP AIR PORTUGAL deal was found by Cheapflights users on 9/15. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/274:35 pmMIA - LGW
1 stop12h 15mTAP AIR PORTUGAL
jue. 12/44:00 pmLGW - MIA
1 stop27h 50mTAP AIR PORTUGAL
Deal found 9/15$446
This TAP AIR PORTUGAL deal was found by Cheapflights users on 9/14. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/311:35 pmMIA - LHR
1 stop14h 20mTAP AIR PORTUGAL
mar. 12/96:00 amLHR - MIA
1 stop13h 50mTAP AIR PORTUGAL
Deal found 9/14$450
This eDestinos deal was found by Cheapflights users on 9/13. 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.
lun. 10/139:05 pmMIA - LHR
Nonstop8h 30mIberia
vie. 10/3111:45 amLHR - MIA
1 stop13h 41mIberia
Deal found 9/13$451
This Flightnetwork deal was found by Cheapflights users on 9/15. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/2912:35 amMIA - LGW
1 stop29h 15mTAP AIR PORTUGAL
jue. 11/64:00 pmLGW - MIA
1 stop34h 20mTAP AIR PORTUGAL
Deal found 9/15$453
This Gurufare deal was found by Cheapflights users on 9/14. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/211:50 pmMIA - LGW
1 stop29h 00mTAP AIR PORTUGAL
mié. 11/1210:40 amLGW - MIA
1 stop16h 10mTAP AIR PORTUGAL
Deal found 9/14$454
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
mié. 11/127:05 pmMIA - STN
1 stop19h 30mMultiple Airlines
mié. 11/196:30 amSTN - MIA
1 stop15h 40mMultiple Airlines
Deal found 9/14$455
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
mié. 10/298:05 pmMIA - LTN
1 stop17h 00mMultiple Airlines
mié. 11/56:50 amLTN - MIA
1 stop15h 20mMultiple Airlines
Deal found 9/14$456
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
mié. 10/298:05 pmMIA - STN
1 stop17h 45mMultiple Airlines
mié. 11/58:30 amSTN - MIA
1 stop13h 40mMultiple Airlines
Deal found 9/14$457
This eDestinos deal was found by Cheapflights users on 9/13. 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.
mié. 10/2911:00 pmMIA - LHR
Nonstop8h 30mBritish Airways
mié. 11/511:15 amLHR - MIA
Nonstop9h 55mBritish Airways
Deal found 9/13$462

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 septiembre 15, 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 - LTN

MIALTN

Miami

mié. 10/29

8:05 pm-5:05 pm

1 stop17h 00m

London Luton

mié. 11/5

6:50 am-5:10 pm

1 stop15h 20m

$456

MiamiLondon

MIA - STN

MIASTN

Miami

mié. 10/29

8:05 pm-5:50 pm

1 stop17h 45m

London Stansted

mié. 11/5

8:30 am-5:10 pm

1 stop13h 40m

$457

MiamiLondon

MIA - LHR

MIALHR

Miami

mar. 11/4

3:27 pm-7:20 am

1 stop10h 53m

London Heathrow

mar. 11/11

11:25 am-8:45 pm

1 stop14h 20m

$501

MiamiLondon

MIA - LHR

MIALHR

Miami

lun. 10/13

6:45 am-11:35 am

1 stop23h 50m

London Heathrow

lun. 10/27

1:45 pm-3:40 pm

1 stop29h 55m

$503

MiamiLondon

MIA - LHR

MIALHR

Miami

mié. 3/4

12:15 pm-7:10 am

2 stops13h 55m

London Heathrow

vie. 3/20

9:00 am-6:30 pm

1 stop13h 30m

$503

MiamiLondon

MIA - LHR

MIALHR

Miami

dom. 10/19

6:45 am-11:35 am

1 stop23h 50m

London Heathrow

vie. 10/31

9:00 am-6:30 pm

1 stop13h 30m

$503

MiamiLondon

MIA - LHR

MIALHR

Miami

mar. 10/21

1:15 pm-6:55 am

1 stop12h 40m

London Heathrow

vie. 10/31

9:00 am-6:30 pm

1 stop13h 30m

$503

MiamiLondon

MIA - LHR

MIALHR

Miami

mar. 10/28

11:10 am-6:30 am

2 stops15h 20m

London Heathrow

mar. 11/4

9:00 am-5:30 pm

1 stop13h 30m

$510

MiamiLondon

MIA - LHR

MIALHR

Miami

dom. 11/9

9:25 pm-11:10 am

Nonstop8h 45m

London Heathrow

jue. 11/20

6:30 am-2:50 pm

1 stop13h 20m

$511

MiamiLondon

MIA - LHR

MIALHR

Miami

mar. 11/4

9:25 pm-11:10 am

Nonstop8h 45m

London Heathrow

jue. 11/13

6:30 am-2:50 pm

1 stop13h 20m

$511

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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 September 12, 2025.

Booking 58 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, November is the cheapest month in which you can book a flight from Key Largo to London (average of $661). Flying from Key Largo to London in June is currently the most expensive (average of $1,097). 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 septiembre 15, 2025.

When flying from Key Largo to London, 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?

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 evenings 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 septiembre 15, 2025.

The most flights from KE9 to LON are scheduled on a Monday (27 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (26 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 septiembre 15, 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
8.0
Very good
7,954 reviews

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

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
8.0
Very good
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

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
7.4
Good
664 reviews
Delta
8.0
Very good
7,954 reviews

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

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
10,000 reviews
Delta
8.0
Very good
7,954 reviews

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

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
7.1
Good
Delta
8.0
Very good
7,954 reviews

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

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
7,361 reviews
Delta
8.0
Very good
7,954 reviews

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

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 $501, British Airways can have you in London from Key Largo in 10h 53m. The distance between Key Largo and London is about 4414 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 Air France (87%), KLM (86%) and Delta (86%).

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

    The cheapest flight price from Key Largo to London is $399. On average you can expect to pay $2,616. The most popular route, (Miami - London Heathrow), can usually be booked for $432.

  • 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, November is the cheapest month in which you can book a flight from Key Largo to London (average of $661). Flying from Key Largo to London in June is currently the most expensive (average of $1,097). 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 septiembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$727FlexibilityNo cancel feeOn-time62%
Scandinavian AirlinesCheapest$203Average$573FlexibilityNo cancel feeOn-time77%
Norse Atlantic UKCheapest$346Average$570FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$369Average$647FlexibilityNo cancel feeOn-time67%
KLMCheapest$431Average$629FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$460Average$739FlexibilityNo cancel feeOn-time70%
DeltaCheapest$460Average$787FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$467Average$756FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$514Average$796FlexibilityNo cancel feeOn-time71%
TAP AIR PORTUGALCheapest$547Average$769FlexibilityNo cancel feeOn-timeN/A

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