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Cheap flights from London to Key Largo from £444

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 22/8. Fares are subject to change and may not be available on all flights or dates of travel.
LON — MIA
17 Aug — 24 Aug1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Key Largo are usually found in September or January, booked 36 days in advance, depart on a Wednesday or Tuesday and return on a Saturday

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 18 July 2026.

Mon 31/806:00
LHR
-
MIA
1 stop13h 35m
TAP AIR PORTUGAL
Sun 6/900:30
MIA
-
LHR
1 stop16h 30m
TAP AIR PORTUGAL
Deal found 17/7£459
Thu 12/1105:55
LTN
-
MIA
1 stop24h 05m
Multiple Airlines
Thu 10/1221:40
MIA
-
LTN
1 stop14h 55m
Multiple Airlines
Deal found 16/7£460
Thu 24/913:35
LGW
-
MIA
2 stops35h 10m
Multiple Airlines
Thu 8/1021:35
MIA
-
LGW
1 stop17h 00m
Multiple Airlines
Deal found 16/7£460
Fri 4/921:25
STN
-
MIA
2 stops22h 10m
Multiple Airlines
Sun 13/916:20
MIA
-
STN
2 stops25h 45m
Multiple Airlines
Deal found 15/7£462
Wed 14/1013:45
LHR
-
MIA
1 stop14h 40m
TAP AIR PORTUGAL
Fri 30/1000:50
MIA
-
LHR
1 stop14h 05m
TAP AIR PORTUGAL
Deal found 14/7£462
Sun 4/1008:00
LTN
-
MIA
2 stops19h 20m
Multiple Airlines
Wed 14/1016:20
MIA
-
LTN
2 stops16h 35m
Multiple Airlines
Deal found 13/7£462
Mon 31/816:25
LGW
-
MIA
1 stop27h 10m
TAP AIR PORTUGAL
Sun 6/900:30
MIA
-
LGW
1 stop28h 15m
TAP AIR PORTUGAL
Deal found 17/7£462
Sat 10/1017:40
STN
-
MIA
2 stops25h 55m
Multiple Airlines
Mon 19/1016:20
MIA
-
STN
2 stops21h 10m
Multiple Airlines
Deal found 13/7£463
Fri 4/906:00
LHR
-
MIA
1 stop13h 35m
TAP AIR PORTUGAL
Sun 13/916:20
MIA
-
LHR
1 stop25h 35m
TAP AIR PORTUGAL
Deal found 15/7£463
Thu 12/1118:30
LHR
-
MIA
1 stop25h 20m
TAP AIR PORTUGAL
Thu 10/1216:50
MIA
-
LHR
1 stop19h 40m
TAP AIR PORTUGAL
Deal found 16/7£464
Sat 3/1017:00
LGW
-
MIA
2 stops34h 20m
Multiple Airlines
Fri 16/1016:20
MIA
-
LGW
2 stops25h 20m
Multiple Airlines
Deal found 13/7£464
Mon 7/919:50
LHR
-
MIA
1 stop23h 45m
TAP AIR PORTUGAL
Mon 5/1016:20
MIA
-
LHR
1 stop13h 00m
TAP AIR PORTUGAL
Deal found 14/7£464

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 18 July 2026.

Round-trip from

£459

One-way from

£444

Popular in

December

Cheapest in

September

Average price

£597
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 31/8-6/9
  • 2 total stops
  • 30h 05m total
  • London to Key Largo
Search Deals
22/8
  • 22/8
  • 3 total stops
  • 37h 50m total
  • London to Key Largo
Search Deals
High demand for flights, 2% potential price rise
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 July 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 18 July 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

Sat 29/8

19:40-20:00

1 stop29h 20m

Miami

Fri 11/9

22:00-08:30

1 stop29h 30m

£484

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sat 10/10

18:45-14:35

1 stop24h 50m

Miami

Sun 18/10

16:20-22:55

1 stop25h 35m

£487

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 7/9

13:45-14:35

1 stop29h 50m

Miami

Sun 13/9

16:20-12:45

1 stop15h 25m

£489

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sun 6/9

06:00-14:35

1 stop13h 35m

Miami

Sun 20/9

00:30-22:55

1 stop17h 25m

£490

LondonMiami

LTN - MIA

LTNMIA

London Luton

Sun 6/9

05:40-22:20

2 stops21h 40m

Miami

Fri 11/9

16:20-23:50

2 stops26h 30m

£505

LondonMiami

SEN - MIA

SENMIA

London Southend

Wed 9/9

08:25-20:00

1 stop16h 35m

Miami

Fri 25/9

22:00-21:45

1 stop18h 45m

£509

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Fri 4/9

08:40-17:25

1 stop13h 45m

Miami

Tue 29/9

19:40-13:00

1 stop12h 20m

£512

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sat 24/10

13:50-15:45

1 stop30h 55m

Miami

Tue 3/11

16:40-13:00

1 stop15h 20m

£512

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 26/10

09:00-18:30

1 stop13h 30m

Miami

Fri 30/10

12:17-09:10

2 stops16h 53m

£514

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 22/9

11:30-20:05

1 stop13h 35m

Miami

Tue 29/9

22:40-12:35

Nonstop8h 55m

£520

Flights are sorted by cheapest return flights first.

Deals found on 17/7

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 18 July 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 18 July 2026.

The most flights from LON to KE9 are scheduled on a Monday (21 on average). You will have fewer flight options on Tuesday, 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?

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 18 July 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
7.6
Good
1,420 reviews
Check prices

Overall

7.6

Food

6.7

Comfort

7.4

Crew

8.2

Boarding

7.7

Entertainment

6.9

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
7.6
Good
1,420 reviews
Finnair
7.6
Good
1,420 reviews
Check prices

Overall

7.6

Food

6.7

Comfort

7.4

Crew

8.2

Boarding

7.7

Entertainment

6.9

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
693 reviews
Finnair
7.6
Good
1,420 reviews
Check prices

Overall

7.6

Food

6.7

Comfort

7.4

Crew

8.2

Boarding

7.7

Entertainment

6.9

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
11,829 reviews
Finnair
7.6
Good
1,420 reviews
Check prices

Overall

7.6

Food

6.7

Comfort

7.4

Crew

8.2

Boarding

7.7

Entertainment

6.9

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
3,258 reviews
Finnair
7.6
Good
1,420 reviews
Check prices

Overall

7.6

Food

6.7

Comfort

7.4

Crew

8.2

Boarding

7.7

Entertainment

6.9

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
8,122 reviews
Finnair
7.6
Good
1,420 reviews
Check prices

Overall

7.6

Food

6.7

Comfort

7.4

Crew

8.2

Boarding

7.7

Entertainment

6.9

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, TAP AIR PORTUGAL, and United Airlines can get you from London to Key Largo in just under 13h 45m. Your travel time can differ by up to 15h 35m. 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 (£178), TAP AIR PORTUGAL (£249), and Aer Lingus (£291).

  • 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: SAUDIA (100%), Gulf Air (94%), Malaysia Airlines (88%).

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

    The cheapest flight price from London to Key Largo is £337. On average you can expect to pay £2,047. The most popular route, (London Heathrow - Miami), can usually be booked for £400.

  • 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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Alternative routes for London to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.
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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 18 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£263Average£399FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£296Average£391FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
DeltaCheapest£308Average£656FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
KLMCheapest£308Average£590FlexibilityNo cancel feeOn-time75%
Search KLM flights
Scandinavian AirlinesCheapest£310Average£371FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
A.P.G.Cheapest£322Average£392FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
SWISSCheapest£341Average£463FlexibilityNo cancel feeOn-time79%
Search SWISS flights
United AirlinesCheapest£355Average£537FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest£357Average£527FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£358Average£530FlexibilityNo cancel feeOn-time76%
Search Finnair 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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