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Cheap flights from London to Key Largo from £376

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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — MIA
9 Sep — 16 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Key Largo are usually found in January or September, booked 36 days in advance, depart on a Wednesday or Thursday 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 10 August 2026.

Mon 21/920:55 -
1 stop22h 50m
Wed 7/1019:20 -
1 stop11h 45m
Deal found 9/8£464
Wed 16/916:45 -
2 stops26h 50m
Mon 28/916:20 -
2 stops16h 30m
Deal found 7/8£464
Thu 12/1117:20 -
2 stops33h 25m
Sat 21/1116:50 -
2 stops24h 25m
Deal found 9/8£465
Wed 9/919:20 -
1 stop30h 30m
Thu 24/921:35 -
1 stop19h 35m
Deal found 6/8£465
Tue 22/921:10 -
2 stops22h 55m
Sat 17/1015:30 -
2 stops17h 00m
Deal found 8/8£465
Tue 15/916:45 -
2 stops26h 50m
Tue 29/916:20 -
2 stops19h 25m
Deal found 9/8£465
Tue 15/913:40 -
2 stops29h 55m
Sun 4/1000:30 -
2 stops37h 35m
Deal found 9/8£466
Wed 21/1011:30 -
2 stops32h 05m
Tue 3/1116:50 -
2 stops18h 45m
Deal found 9/8£466
Sat 14/1107:55 -
2 stops17h 55m
Wed 25/1117:15 -
2 stops20h 20m
Deal found 5/8£467
Thu 17/915:25 -
1 stop33h 35m
Wed 30/922:00 -
1 stop33h 15m
Deal found 5/8£467
Wed 16/915:30 -
2 stops28h 05m
Wed 30/916:20 -
2 stops24h 10m
Deal found 9/8£468
Thu 12/1117:00 -
2 stops33h 45m
Sat 21/1116:50 -
2 stops19h 45m
Deal found 9/8£468

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 10 August 2026.

Round-trip from

£464

One-way from

£376

Popular in

August

Cheapest in

January

Average price

£631
Virgin Atlantic
  • Virgin Atlantic
  • 21/9-7/10
  • 2 total stops
  • 34h 35m total
  • London to Key Largo
Search Deals
31/8
  • 31/8
  • 2 total stops
  • 30h 25m total
  • London to Key Largo
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£15 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 10 August 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

SEN London Southend - MIA Miami

SENMIA

London Southend

Thu 12/11

17:20-21:45

2 stops33h 25m

Miami

Sat 21/11

16:50-22:15

2 stops24h 25m

£465

LondonMiami

LGW London Gatwick - MIA Miami

LGWMIA

London Gatwick

Thu 17/9

20:35-20:00

1 stop28h 25m

Miami

Mon 21/9

22:00-10:15

1 stop31h 15m

£468

LondonMiami

LTN London Luton - MIA Miami

LTNMIA

London Luton

Thu 24/9

17:30-20:00

1 stop31h 30m

Miami

Wed 7/10

22:00-18:05

1 stop15h 05m

£470

LondonMiami

LGW London Gatwick - MIA Miami

LGWMIA

London Gatwick

Mon 21/9

06:50-20:00

1 stop18h 10m

Miami

Wed 7/10

22:00-12:40

1 stop33h 40m

£472

LondonMiami

LGW London Gatwick - MIA Miami

LGWMIA

London Gatwick

Thu 24/9

15:25-20:00

1 stop33h 35m

Miami

Wed 7/10

22:00-17:55

1 stop14h 55m

£476

LondonMiami

LGW London Gatwick - MIA Miami

LGWMIA

London Gatwick

Sun 6/9

21:45-20:00

1 stop27h 15m

Miami

Mon 28/9

22:00-11:25

1 stop32h 25m

£486

LondonMiami

LGW London Gatwick - MIA Miami

LGWMIA

London Gatwick

Thu 1/10

14:30-20:00

1 stop34h 30m

Miami

Wed 7/10

22:00-17:55

1 stop14h 55m

£493

LondonMiami

LHR London Heathrow - MIA Miami

LHRMIA

London Heathrow

Mon 21/9

06:30-18:46

2 stops17h 16m

Miami

Wed 7/10

07:10-07:15

1 stop19h 05m

£498

LondonMiami

LTN London Luton - MIA Miami

LTNMIA

London Luton

Wed 2/9

16:30-14:35

2 stops27h 05m

Miami

Wed 16/9

03:50-10:55

2 stops26h 05m

£503

LondonMiami

STN London Stansted - MIA Miami

STNMIA

London Stansted

Thu 24/9

22:05-20:00

2 stops26h 55m

Miami

Wed 7/10

22:00-17:10

1 stop14h 10m

£504

Flights are sorted by cheapest return flights first.

Deals found on 9/8

Showing 1-10 of 60 resultsSorted by cheapest first
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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 10 August 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 10 August 2026.

The most flights from LON to KE9 are scheduled on a Monday (26 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (16 on average).

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

Airfare is below average for this route at the moment.
London to Key Largo flights typically cost between £541 and £756 in September.
The cheapest return price found within the last 5 days was £464 on Virgin Atlantic (21 Sept–7 Oct).

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 10 August 2026.
Read through reviews of airlines operating flights from London to Key Largo, such as Finnair,Virgin Atlantic, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.7
Good
1,428 reviews
Check prices

Food

6.7

Overall

7.7

Boarding

7.7

Entertainment

6.9

Comfort

7.4

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Jake,Jun 2026

RNO - SEA

Our checked baggage was not transferred correctly so now we are stuck in Budapest with out essential luggage. We are not able to get much help from FinnAir because their service from Seattle is on periodic.
Finnair
7.7
Good
1,428 reviews
Finnair
7.7
Good
1,428 reviews
Check prices

Food

6.7

Overall

7.7

Boarding

7.7

Entertainment

6.9

Comfort

7.4

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Jake,Jun 2026

RNO - SEA

Our checked baggage was not transferred correctly so now we are stuck in Budapest with out essential luggage. We are not able to get much help from FinnAir because their service from Seattle is on periodic.
Virgin Atlantic
7.5
Good
694 reviews
Finnair
7.7
Good
1,428 reviews
Check prices

Food

6.7

Overall

7.7

Boarding

7.7

Entertainment

6.9

Comfort

7.4

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Jake,Jun 2026

RNO - SEA

Our checked baggage was not transferred correctly so now we are stuck in Budapest with out essential luggage. We are not able to get much help from FinnAir because their service from Seattle is on periodic.
American Airlines
7.1
Good
11,899 reviews
Finnair
7.7
Good
1,428 reviews
Check prices

Food

6.7

Overall

7.7

Boarding

7.7

Entertainment

6.9

Comfort

7.4

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Jake,Jun 2026

RNO - SEA

Our checked baggage was not transferred correctly so now we are stuck in Budapest with out essential luggage. We are not able to get much help from FinnAir because their service from Seattle is on periodic.
Iberia
7.0
Good
3,261 reviews
Finnair
7.7
Good
1,428 reviews
Check prices

Food

6.7

Overall

7.7

Boarding

7.7

Entertainment

6.9

Comfort

7.4

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Jake,Jun 2026

RNO - SEA

Our checked baggage was not transferred correctly so now we are stuck in Budapest with out essential luggage. We are not able to get much help from FinnAir because their service from Seattle is on periodic.
British Airways
6.7
Okay
8,153 reviews
Finnair
7.7
Good
1,428 reviews
Check prices

Food

6.7

Overall

7.7

Boarding

7.7

Entertainment

6.9

Comfort

7.4

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Jake,Jun 2026

RNO - SEA

Our checked baggage was not transferred correctly so now we are stuck in Budapest with out essential luggage. We are not able to get much help from FinnAir because their service from Seattle is on periodic.

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 United Airlines can get you from London to Key Largo in just under 13h 40m. Your travel time can differ by up to 14h 45m. 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 (£177), TAP AIR PORTUGAL (£185), 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 Gatwick - Miami or London City - 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: SAUDIA (85%), Malaysia Airlines (85%), Gulf Air (85%).

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

    The cheapest flight price from London to Key Largo is £344. On average you can expect to pay £2,264. The most popular route, (London Heathrow - Miami), can usually be booked for £363.

  • 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

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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 10 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£274Average£407FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£295Average£423FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
DeltaCheapest£307Average£648FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£324Average£385FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
SWISSCheapest£347Average£461FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Air CanadaCheapest£348Average£525FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£354Average£546FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
TAP AIR PORTUGALCheapest£354Average£510FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
LufthansaCheapest£372Average£498FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£380Average£572FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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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