Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London to Key Largo from £330

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — MIA
29 May — 5 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 52 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 29 April 2026.

Thu 30/415:35
LHR
-
MIA
Nonstop9h 40m
British Airways
Sun 3/522:40
MIA
-
LHR
Nonstop8h 55m
British Airways
Deal found 26/4£506
Fri 20/1110:00
LGW
-
MIA
1 stop14h 30m
Air Europa
Wed 25/1121:45
MIA
-
LGW
1 stop13h 40m
Air Europa
Deal found 26/4£506
Wed 1/709:15
LHR
-
MIA
1 stop15h 50m
Iberia
Wed 22/722:00
MIA
-
LHR
1 stop13h 20m
Iberia
Deal found 27/4£507
Wed 26/809:55
LHR
-
MIA
1 stop15h 05m
LEVEL
Wed 9/921:45
MIA
-
LHR
1 stop17h 20m
LEVEL
Deal found 26/4£508
Fri 5/605:40
LTN
-
MIA
1 stop19h 20m
Multiple Airlines
Mon 15/621:45
MIA
-
LTN
1 stop20h 15m
Multiple Airlines
Deal found 25/4£509
Mon 25/511:30
LHR
-
MIA
1 stop14h 15m
Virgin Atlantic
Tue 9/611:23
MIA
-
LHR
1 stop13h 57m
Virgin Atlantic
Deal found 27/4£509
Mon 8/616:35
LHR
-
MIA
1 stop12h 45m
American Airlines
Tue 16/613:49
MIA
-
LHR
1 stop15h 26m
American Airlines
Deal found 27/4£510
Thu 4/620:50
LHR
-
MIA
1 stop28h 10m
LEVEL
Sun 7/621:45
MIA
-
LHR
1 stop30h 25m
LEVEL
Deal found 28/4£510
Fri 13/1117:25
LGW
-
MIA
1 stop31h 05m
Air Europa
Sat 28/1121:45
MIA
-
LGW
1 stop30h 15m
Air Europa
Deal found 28/4£510
Wed 20/509:55
LHR
-
MIA
1 stop15h 05m
LEVEL
Mon 25/521:45
MIA
-
LHR
1 stop30h 25m
LEVEL
Deal found 26/4£511
Thu 17/910:00
LGW
-
MIA
1 stop13h 45m
Air Europa
Sat 26/921:30
MIA
-
LGW
1 stop13h 55m
Air Europa
Deal found 29/4£511
Mon 7/916:30
LHR
-
MIA
1 stop28h 30m
ITA Airways
Wed 23/919:45
MIA
-
LHR
1 stop32h 55m
ITA Airways
Deal found 28/4£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 29 April 2026.

Round-trip from

£507

One-way from

£330

Popular in

December

Cheapest in

September

Average price

£529
Iberia
  • Iberia
  • 1/7-22/7
  • 2 total stops
  • 29h 10m total
  • London to Key Largo
Search Deals
15/9
  • 15/9
  • 3 total stops
  • 30h 05m total
  • London to Key Largo
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (£4 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 April 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 29 April 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

LGW - MIA

LGWMIA

London Gatwick

Fri 4/9

10:00-18:45

1 stop13h 45m

Miami

Thu 17/9

21:30-16:25

1 stop13h 55m

£515

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Fri 4/9

10:00-18:45

1 stop13h 45m

Miami

Sun 27/9

21:30-16:25

1 stop13h 55m

£516

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Sun 6/9

10:00-18:45

1 stop13h 45m

Miami

Tue 22/9

21:30-16:25

1 stop13h 55m

£516

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Sun 6/9

10:00-18:45

1 stop13h 45m

Miami

Sun 27/9

21:30-16:25

1 stop13h 55m

£516

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 18/5

10:50-20:25

1 stop14h 35m

Miami

Thu 28/5

13:49-06:25

1 stop11h 36m

£538

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sun 24/5

06:30-14:45

1 stop13h 15m

Miami

Tue 9/6

15:25-08:50

1 stop12h 25m

£542

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 1/9

11:30-20:05

1 stop13h 35m

Miami

Thu 24/9

15:30-08:00

1 stop11h 30m

£542

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Mon 8/6

12:20-20:45

1 stop13h 25m

Miami

Tue 30/6

09:03-10:40

1 stop20h 37m

£545

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 1/10

08:55-17:50

1 stop13h 55m

Miami

Tue 20/10

18:05-08:05

Nonstop9h 00m

£552

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 25/5

09:55-14:30

Nonstop9h 35m

Miami

Tue 9/6

18:21-21:40

1 stop22h 19m

£557

Flights are sorted by cheapest return flights first.

Deals found on 28/4

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 29 April 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 29 April 2026.

The most flights from LON to KE9 are scheduled on a Tuesday (28 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (10 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 29 April 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

Crew

8.2

Comfort

7.4

Overall

7.6

Food

6.7

Entertainment

6.9

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

Crew

8.2

Comfort

7.4

Overall

7.6

Food

6.7

Entertainment

6.9

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

Crew

8.2

Comfort

7.4

Overall

7.6

Food

6.7

Entertainment

6.9

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

Crew

8.2

Comfort

7.4

Overall

7.6

Food

6.7

Entertainment

6.9

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
11,680 reviews
Finnair
7.6
Good
1,392 reviews
Check prices

Boarding

7.7

Crew

8.2

Comfort

7.4

Overall

7.6

Food

6.7

Entertainment

6.9

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
7,937 reviews
Finnair
7.6
Good
1,392 reviews
Check prices

Boarding

7.7

Crew

8.2

Comfort

7.4

Overall

7.6

Food

6.7

Entertainment

6.9

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?

    Air Europa, British Airways, and Delta can get you from London to Key Largo in just under 13h 15m. Your travel time can differ by up to 1h 20m. 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 (£175), TAP AIR PORTUGAL (£248), and Aer Lingus (£290).

  • 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 Stansted - Miami or London Gatwick - 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: Malaysia Airlines (91%), Gulf Air (88%), SriLankan Airlines (84%).

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

    The cheapest flight price from London to Key Largo is £435. On average you can expect to pay £1,606. The most popular route, (London Heathrow - Miami), can usually be booked for £403.

  • 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

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 London to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Orlando flights
Heathrow to Miami flights
Manchester to Orlando flights
Gatwick to Orlando flights
Stansted to Orlando flights
Stansted to Miami flights
Gatwick to Miami flights
London City to Miami flights
London City to Orlando flights
Heathrow to Tampa flights
Luton to Orlando flights
Luton to Miami flights
Heathrow to Fort Lauderdale flights
Edinburgh to Orlando flights
Gatwick to Fort Lauderdale flights
Gatwick to Tampa flights
Stansted to Tampa flights
London City to Tampa flights
Manchester to Miami flights
Southend to Miami flights
Luton to Fort Lauderdale flights
Stansted to Fort Lauderdale flights
Luton to Tampa flights
Heathrow to Jacksonville flights
Manchester to Fort Lauderdale flights
Manchester to Tampa flights
Birmingham to Orlando flights
Heathrow to Fort Myers flights
Gatwick to Jacksonville flights
Newcastle upon Tyne to Orlando flights
Edinburgh to Miami flights
London City to Fort Lauderdale flights
Heathrow to West Palm Beach flights
Birmingham to Tampa flights
Edinburgh to Sarasota flights
Heathrow to Panama City flights
Heathrow to Melbourne flights
Heathrow to Pensacola flights
Birmingham to Fort Lauderdale flights
Birmingham to Miami flights
Gatwick to Fort Myers flights
Newcastle upon Tyne to Miami flights
Stansted to Fort Myers flights
London City to Jacksonville flights
Gatwick to West Palm Beach flights
Heathrow to Sarasota flights
Bristol to Orlando flights
Manchester to Sarasota flights
Edinburgh to Fort Lauderdale flights
Southampton to Miami flights

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 29 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£272Average£416FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£295Average£375FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
SWISSCheapest£297Average£424FlexibilityNo cancel feeOn-time79%
Search SWISS flights
DeltaCheapest£307Average£639FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£309Average£364FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
A.P.G.Cheapest£321Average£467FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
Air EuropaCheapest£352Average£468FlexibilityNo cancel feeOn-time83%
Search Air Europa flights
United AirlinesCheapest£354Average£527FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£355Average£525FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£356Average£537FlexibilityNo cancel feeOn-time67%
Search Air Canada 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.

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.