London

$194+ 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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — LON
May 4 — May 111
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Key Largo to London with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Key Largo to London are usually found in February or January, booked 55 days in advance, depart on a Wednesday or Tuesday 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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$450
(Norse Atlantic Airways)

One-way from

$194
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$600
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 (LON)
One-way flight from Key Largo to London (LON)
Highest demand for flights based on searches. 3% potential increase in price ($23 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Average for round-trip flights in April 2025

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 April 29, 2025.

This Norse Atlantic Airways deal was found by Cheapflights users on 4/29. 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 Norse Atlantic Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/25:20 pmMIA - LGW
Nonstop8h 40mNorse Atlantic UK
Tue 8/1910:00 amLGW - MIA
Nonstop9h 20mNorse Atlantic UK
Deal found 4/29$446
This Booking.com deal was found by Cheapflights users on 4/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/303:55 amMIA - LGW
1 stop24h 50mMultiple Airlines
Tue 8/2610:00 amLGW - MIA
Nonstop9h 20mMultiple Airlines
Deal found 4/29$465
This eDestinos deal was found by Cheapflights users on 4/28. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/298:45 pmMIA - LHR
1 stop32h 10mScandinavian Airlines
Wed 11/121:55 pmLHR - MIA
1 stop33h 00mScandinavian Airlines
Deal found 4/28$470
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3112:02 pmMIA - LGW
1 stop13h 33mAmerican Airlines
Tue 8/2612:20 pmLGW - MIA
1 stop14h 38mAmerican Airlines
Deal found 4/29$517
This Mytrip deal was found by Cheapflights users on 4/28. 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.
Sun 9/1412:35 amMIA - LHR
1 stop28h 45mTAP AIR PORTUGAL
Tue 9/3011:20 amLHR - MIA
1 stop32h 25mTAP AIR PORTUGAL
Deal found 4/28$528
This eDestinos deal was found by Cheapflights users on 4/28. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/211:35 pmMIA - LHR
1 stop11h 45mBritish Airways
Thu 9/259:55 amLHR - MIA
Nonstop9h 30mBritish Airways
Deal found 4/28$556
This SmartFares deal was found by Cheapflights users on 4/28. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/193:35 pmMIA - LHR
1 stop12h 15mVirgin Atlantic
Wed 9/1710:45 amLHR - MIA
Nonstop10h 00mVirgin Atlantic
Deal found 4/28$593
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/23:10 pmMIA - LGW
1 stop13h 50mDelta
Tue 8/1912:00 pmLGW - MIA
1 stop16h 19mDelta
Deal found 4/29$596
This SWISS deal was found by Cheapflights users on 4/29. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/127:40 pmMIA - LHR
1 stop12h 20mSWISS
Sun 5/186:40 pmLHR - MIA
1 stop27h 50mSWISS
Deal found 4/29$602
This American Airlines deal was found by Cheapflights users on 4/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/305:35 pmMIA - LHR
1 stop11h 05mAmerican Airlines
Tue 8/197:50 amLHR - MIA
1 stop14h 00mAmerican Airlines
Deal found 4/28$605
This Booking.com deal was found by Cheapflights users on 4/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/47:55 amMIA - LHR
1 stop21h 05mAir Canada
Thu 8/148:30 amLHR - MIA
2 stops19h 46mAir Canada
Deal found 4/29$619
This Air France deal was found by Cheapflights users on 4/27. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/133:24 pmMIA - LHR
1 stop12h 26mAir France
Thu 5/226:15 amLHR - MIA
1 stop13h 00mAir France
Deal found 4/27$620

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 April 29, 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 - LGW

MIALGW

Miami

Sat 8/2

5:20 pm-7:00 am

Nonstop8h 40m

London Gatwick

Tue 8/19

10:00 am-2:20 pm

Nonstop9h 20m

$446

MiamiLondon

MIA - LGW

MIALGW

Miami

Wed 7/30

3:55 am-9:45 am

1 stop24h 50m

London Gatwick

Tue 8/26

10:00 am-2:20 pm

Nonstop9h 20m

$465

MiamiLondon

MIA - LGW

MIALGW

Miami

Thu 7/31

12:02 pm-6:35 am

1 stop13h 33m

London Gatwick

Tue 8/26

12:20 pm-9:58 pm

1 stop14h 38m

$517

MiamiLondon

MIA - LHR

MIALHR

Miami

Sun 10/12

12:35 am-10:55 pm

1 stop17h 20m

London Heathrow

Wed 10/22

7:50 pm-2:45 pm

1 stop23h 55m

$539

MiamiLondon

MIA - LHR

MIALHR

Miami

Thu 7/31

5:00 pm-6:55 am

Nonstop8h 55m

London Heathrow

Tue 8/26

12:15 pm-4:40 pm

Nonstop9h 25m

$544

MiamiLondon

MIA - LHR

MIALHR

Miami

Wed 8/13

5:00 pm-6:55 am

Nonstop8h 55m

London Heathrow

Wed 9/3

12:15 pm-4:50 pm

Nonstop9h 35m

$557

MiamiLondon

MIA - LGW

MIALGW

Miami

Sat 8/2

3:10 pm-10:00 am

1 stop13h 50m

London Gatwick

Tue 8/19

12:00 pm-11:19 pm

1 stop16h 19m

$596

MiamiLondon

MIA - LHR

MIALHR

Miami

Mon 5/12

7:40 pm-1:00 pm

1 stop12h 20m

London Heathrow

Sun 5/18

6:40 pm-5:30 pm

1 stop27h 50m

$602

MiamiLondon

MIA - LHR

MIALHR

Miami

Mon 5/12

7:25 pm-9:25 am

Nonstop9h 00m

London Heathrow

Tue 5/20

9:00 am-8:45 pm

1 stop16h 45m

$615

MiamiLondon

MIA - LHR

MIALHR

Miami

Mon 8/4

7:55 am-10:00 am

1 stop21h 05m

London Heathrow

Thu 8/14

8:30 am-11:16 pm

2 stops19h 46m

$619

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 60 results
1
2
3
...
6

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 April 25, 2025.

Booking 55 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 $1,110). 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 April 29, 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 April 29, 2025.

The most flights from KE9 to LON are scheduled on a Monday (34 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (23 on average).

Rainfall in London by month

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

In terms of precipitation, rainfall in London 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 when rainfall is around 1.6 in.

Temperature in London by month

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

If weather is an important factor for your trip to London, 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 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 April 29, 2025.
Read through reviews of airlines operating flights from Key Largo to London, such as Delta, EL AL and KLM. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

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

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

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

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

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

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

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

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

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

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

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 London. 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 one-way?

    One-way options have recently been found by users for as low as $194 on Norse Atlantic UK. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $203 and A.P.G. from $263 one-way.

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

  • 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 (80%), KLM (79%) and Delta (79%).

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

    The cheapest flight price from Key Largo to London is $379. On average you can expect to pay $3,005. The most popular route, (Miami - London Heathrow), can usually be booked for $531.

  • 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 $1,110). 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
Luton
Horley
Canterbury
Harrow
Wembley
Dover
Gatwick
Orpington
Watford
Croydon
Borehamwood
Folkestone
Ilford
Aylesbury
Sutton
Chelmsford
Brentwood

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Key Largo to London

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

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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$203Average$481FlexibilityNo cancel feeOn-time77%
Norse Atlantic UKCheapest$284Average$571FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$358Average$751FlexibilityNo cancel feeOn-time70%
Air CanadaCheapest$369Average$635FlexibilityNo cancel feeOn-time67%
Virgin AtlanticCheapest$455Average$734FlexibilityNo cancel feeOn-time72%
FinnairCheapest$455Average$756FlexibilityNo cancel feeOn-time76%
DeltaCheapest$465Average$743FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$468Average$563FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$513Average$755FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$527Average$791FlexibilityNo cancel feeOn-time62%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.