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Cheap flights from London to Key Largo from £327

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 21/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — MIA
5 Jun — 12 Jun1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Key Largo are usually found in September or November, booked 43 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from London to Key Largo

Enter your travel dates to find the best prices.

Cheapest flights from London to Key Largo
Explore the most affordable flight options available from London to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 May 2026.

Sun 24/506:30
LHR
-
MIA
1 stop13h 15m
Virgin Atlantic
Tue 9/618:05
MIA
-
LHR
Nonstop9h 00m
Virgin Atlantic
Deal found 2/5£507
Sat 5/921:15
LGW
-
MIA
2 stops22h 20m
TAP AIR PORTUGAL
Sun 18/1016:30
MIA
-
LGW
2 stops22h 55m
TAP AIR PORTUGAL
Deal found 2/5£507
Tue 22/910:30
LHR
-
MIA
1 stop34h 30m
ITA Airways
Tue 6/1019:45
MIA
-
LHR
1 stop32h 55m
ITA Airways
Deal found 3/5£507
Tue 3/1110:00
LGW
-
MIA
1 stop14h 30m
Air Europa
Tue 10/1121:45
MIA
-
LGW
1 stop13h 40m
Air Europa
Deal found 4/5£507
Mon 29/614:45
LHR
-
MIA
1 stop23h 28m
American Airlines
Wed 8/713:48
MIA
-
LHR
1 stop15h 27m
American Airlines
Deal found 4/5£509
Sun 1/1110:00
LGW
-
MIA
1 stop14h 30m
Air Europa
Wed 25/1121:45
MIA
-
LGW
1 stop13h 40m
Air Europa
Deal found 2/5£509
Tue 3/1110:30
LHR
-
MIA
1 stop15h 25m
ITA Airways
Thu 12/1119:55
MIA
-
LHR
1 stop14h 45m
ITA Airways
Deal found 4/5£510
Fri 5/607:10
LGW
-
MIA
1 stop17h 50m
LEVEL
Sun 7/621:45
MIA
-
LGW
1 stop30h 45m
LEVEL
Deal found 2/5£510
Sat 3/1010:00
LGW
-
MIA
1 stop13h 45m
Air Europa
Sat 17/1021:30
MIA
-
LGW
1 stop13h 55m
Air Europa
Deal found 1/5£510
Wed 25/1110:40
LGW
-
MIA
1 stop16h 05m
TAP AIR PORTUGAL
Mon 18/116:50
MIA
-
LGW
2 stops22h 45m
TAP AIR PORTUGAL
Deal found 1/5£511
Thu 27/806:30
LHR
-
MIA
1 stop13h 15m
Virgin Atlantic
Thu 24/914:03
MIA
-
LHR
1 stop11h 22m
Virgin Atlantic
Deal found 3/5£512
Wed 27/507:40
LGW
-
MIA
1 stop17h 20m
LEVEL
Wed 23/921:45
MIA
-
LGW
1 stop33h 30m
LEVEL
Deal found 3/5£512

Find flight deals from London to Key Largo

Keep the following information in mind while searching for London to Key Largo flight deals. Data was last updated 6 May 2026.

Round-trip from

£507

One-way from

£327

Popular in

December

Cheapest in

September

Average price

£493
Virgin Atlantic
  • Virgin Atlantic
  • 24/5-9/6
  • 1 total stop
  • 22h 15m total
  • London to Key Largo
Search Deals
21/5
  • 21/5
  • 2 total stops
  • 51h 50m total
  • London to Key Largo
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (£3 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Key Largo 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 858,174 searches. Data last updated 6 May 2026.
Use the filters below to find and compare flights from London to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sun 30/8

09:55-20:00

1 stop15h 05m

Miami

Fri 11/9

21:45-09:10

1 stop30h 25m

£532

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sun 24/5

06:30-14:45

1 stop13h 15m

Miami

Tue 9/6

22:35-12:35

Nonstop9h 00m

£549

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Wed 1/7

12:20-20:45

1 stop13h 25m

Miami

Mon 6/7

06:00-10:50

2 stops23h 50m

£558

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 4/6

06:30-14:45

1 stop13h 15m

Miami

Thu 11/6

18:05-08:05

Nonstop9h 00m

£558

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 8/6

08:55-17:50

1 stop13h 55m

Miami

Tue 14/7

15:17-12:10

1 stop15h 53m

£563

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Wed 1/7

06:45-19:33

2 stops17h 48m

Miami

Mon 6/7

06:00-06:25

1 stop19h 25m

£567

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Thu 9/7

10:25-20:45

1 stop15h 20m

Miami

Wed 15/7

23:00-16:00

1 stop12h 00m

£567

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sun 12/7

20:05-10:24

1 stop19h 19m

Miami

Wed 19/8

11:24-06:45

1 stop14h 21m

£576

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Fri 30/10

08:55-18:40

1 stop13h 45m

Miami

Fri 13/11

17:10-07:00

Nonstop8h 50m

£577

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Fri 10/7

07:10-20:00

1 stop17h 50m

Miami

Fri 24/7

21:45-07:00

1 stop28h 15m

£579

Flights are sorted by cheapest return flights first.

Deals found on 1/5

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from London to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from London with our price prediction graph.
Estimated return 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 London to Key Largo

What is the cheapest time of day to fly from LON to KE9?

Find hourly flight availability from London to Key Largo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 6 May 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to Key Largo as you normally would.

Weekly flight availability from London to Key Largo

Explore weekly flight availability from London to Key Largo. 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 6 May 2026.

The most flights from LON to KE9 are scheduled on a Monday (28 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (20 on average).

How much does it cost for a return flight from London to Key Largo?

Reviews of airlines servicing Key Largo

Get insights into the airlines that provide service to Key Largo. 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 Key Largo. Reviews last updated 6 May 2026.
Read through reviews of airlines operating flights from London to Key Largo, such as Finnair,Virgin Atlantic, andNorse Atlantic UK. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,392 reviews
Check prices

Boarding

7.7

Food

6.7

Overall

7.6

Comfort

7.4

Entertainment

6.9

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Finnair
7.6
Good
1,392 reviews
Finnair
7.6
Good
1,392 reviews
Check prices

Boarding

7.7

Food

6.7

Overall

7.6

Comfort

7.4

Entertainment

6.9

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Virgin Atlantic
7.4
Good
688 reviews
Finnair
7.6
Good
1,392 reviews
Check prices

Boarding

7.7

Food

6.7

Overall

7.6

Comfort

7.4

Entertainment

6.9

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Norse Atlantic UK
7.2
Good
Finnair
7.6
Good
1,392 reviews
Check prices

Boarding

7.7

Food

6.7

Overall

7.6

Comfort

7.4

Entertainment

6.9

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
American Airlines
7.1
Good
11,669 reviews
Finnair
7.6
Good
1,392 reviews
Check prices

Boarding

7.7

Food

6.7

Overall

7.6

Comfort

7.4

Entertainment

6.9

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
British Airways
6.7
Okay
7,949 reviews
Finnair
7.6
Good
1,392 reviews
Check prices

Boarding

7.7

Food

6.7

Overall

7.6

Comfort

7.4

Entertainment

6.9

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

Related info for your journey

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

    LEVEL, Delta, and British Airways can get you from London to Key Largo in just under 13h 15m. Your travel time can differ by up to 1h 50m. London and Key Largo are separated by a distance of 4414 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    The cheapet airlines for a one-way flight from London to Key Largo are Norse Atlantic UK (£174), TAP AIR PORTUGAL (£247), and Aer Lingus (£288).

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

    When deciding which route to take from London to Key Largo consider London Heathrow - Miami, London Gatwick - Miami or London Stansted - Miami as they are the most popular.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Key Largo on time: Gulf Air (92%), SriLankan Airlines (91%), Malaysia Airlines (89%).

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

    The cheapest flight price from London to Key Largo is £422. On average you can expect to pay £1,589. The most popular route, (London Heathrow - Miami), can usually be booked for £413.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London to Key Largo by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for London to Key Largo

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Top 10 airlines flying from London to Key Largo

Discover the top 10 airlines that operate flights from London to Key Largo. 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 858,174 searches. Data last updated 6 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£270Average£419FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£293Average£372FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
SWISSCheapest£295Average£421FlexibilityNo cancel feeOn-time79%
Search SWISS flights
DeltaCheapest£305Average£636FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£307Average£361FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
A.P.G.Cheapest£319Average£427FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
TAP AIR PORTUGALCheapest£346Average£515FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air EuropaCheapest£350Average£465FlexibilityNo cancel feeOn-time83%
Search Air Europa flights
United AirlinesCheapest£351Average£524FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£352Average£521FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Key Largo?

Deals for London to Key Largo flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from London to Key Largo?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from London to Key Largo.

Can Cheapflights find flights from London to Key Largo with no change fees?

Need flexible booking options for your flight to Key Largo from London? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from London to Key Largo become cheaper?

Of course! You can now track prices for flights from London to Key Largo and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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