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Cheap flights from London to Key Largo from £408

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — MIA
24 Aug — 31 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 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 25 July 2026.

Mon 7/919:50
LHR
-
MIA
1 stop23h 45m
TAP AIR PORTUGAL
Sun 13/900:30
MIA
-
LHR
1 stop13h 20m
TAP AIR PORTUGAL
Deal found 24/7£463
Mon 7/915:00
LHR
-
MIA
2 stops28h 35m
Multiple Airlines
Mon 14/916:20
MIA
-
LHR
2 stops16h 55m
Multiple Airlines
Deal found 24/7£464
Wed 2/908:20
STN
-
MIA
2 stops35h 15m
Multiple Airlines
Fri 18/900:20
MIA
-
STN
2 stops25h 50m
Multiple Airlines
Deal found 24/7£465
Thu 15/1006:00
LHR
-
MIA
1 stop13h 35m
TAP AIR PORTUGAL
Sun 25/1000:50
MIA
-
LHR
1 stop17h 50m
TAP AIR PORTUGAL
Deal found 24/7£465
Wed 14/1011:20
LHR
-
MIA
1 stop17h 05m
TAP AIR PORTUGAL
Sun 25/1017:50
MIA
-
LHR
1 stop14h 50m
TAP AIR PORTUGAL
Deal found 24/7£466
Thu 27/808:00
LGW
-
MIA
2 stops35h 35m
Multiple Airlines
Wed 9/903:50
MIA
-
LGW
2 stops35h 25m
Multiple Airlines
Deal found 24/7£466
Sun 6/913:45
LHR
-
MIA
1 stop13h 35m
TAP AIR PORTUGAL
Fri 18/900:20
MIA
-
LHR
1 stop13h 30m
TAP AIR PORTUGAL
Deal found 24/7£467
Tue 15/916:25
LGW
-
MIA
1 stop27h 10m
TAP AIR PORTUGAL
Tue 22/916:20
MIA
-
LGW
1 stop12h 25m
TAP AIR PORTUGAL
Deal found 24/7£467
Thu 17/917:35
STN
-
MIA
2 stops26h 00m
Multiple Airlines
Fri 25/916:20
MIA
-
STN
2 stops27h 00m
Multiple Airlines
Deal found 24/7£468
Wed 26/820:35
LTN
-
MIA
2 stops27h 10m
Multiple Airlines
Wed 9/921:30
MIA
-
LTN
2 stops17h 25m
Multiple Airlines
Deal found 24/7£468
Sat 5/919:50
LHR
-
MIA
1 stop23h 45m
TAP AIR PORTUGAL
Fri 11/900:20
MIA
-
LHR
1 stop13h 30m
TAP AIR PORTUGAL
Deal found 22/7£468
Tue 3/1116:35
LGW
-
MIA
1 stop27h 15m
TAP AIR PORTUGAL
Thu 12/1116:50
MIA
-
LGW
1 stop18h 00m
TAP AIR PORTUGAL
Deal found 23/7£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 25 July 2026.

Round-trip from

£463

One-way from

£408

Popular in

December

Cheapest in

September

Average price

£618
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 7/9-13/9
  • 2 total stops
  • 37h 05m total
  • London to Key Largo
Search Deals
1/9
  • 1/9
  • 3 total stops
  • 32h 10m total
  • London to Key Largo
Search Deals
High demand for flights, 3% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£5 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 25 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

LHR - MIA

LHRMIA

London Heathrow

Thu 24/9

18:45-14:35

1 stop24h 50m

Miami

Sun 27/9

00:30-18:50

1 stop13h 20m

£489

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Tue 15/9

16:25-14:35

1 stop27h 10m

Miami

Tue 6/10

16:20-11:20

2 stops38h 00m

£504

LondonMiami

LTN - MIA

LTNMIA

London Luton

Tue 13/10

08:00-20:05

1 stop17h 05m

Miami

Fri 23/10

16:55-13:45

1 stop15h 50m

£516

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 20/8

12:10-17:25

1 stop34h 15m

Miami

Wed 2/9

19:59-20:40

1 stop19h 41m

£517

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 31/8

08:40-17:30

1 stop13h 50m

Miami

Sun 13/9

13:44-09:20

2 stops14h 36m

£519

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sun 30/8

13:50-17:30

1 stop32h 40m

Miami

Thu 1/10

12:29-06:45

1 stop13h 16m

£519

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 31/8

07:30-18:52

2 stops16h 22m

Miami

Sat 19/9

08:25-06:45

2 stops17h 20m

£524

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Wed 2/9

07:30-18:52

2 stops16h 22m

Miami

Sat 19/9

12:17-09:20

2 stops16h 03m

£524

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 3/9

07:30-18:52

2 stops16h 22m

Miami

Sun 27/9

13:26-10:25

2 stops15h 59m

£524
Fastest return journey

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

£528

Flights are sorted by cheapest return flights first.

Deals found on 24/7

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 25 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 25 July 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 £535 and £735 in September.
The cheapest return price found within the last 5 days was £463 on TAP AIR PORTUGAL (7 Sept–13 Sept).

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 25 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
1,423 reviews
Check prices

Boarding

7.7

Food

6.7

Entertainment

6.9

Crew

8.2

Overall

7.6

Comfort

7.4

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
1,423 reviews
Finnair
7.6
Good
1,423 reviews
Check prices

Boarding

7.7

Food

6.7

Entertainment

6.9

Crew

8.2

Overall

7.6

Comfort

7.4

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
695 reviews
Finnair
7.6
Good
1,423 reviews
Check prices

Boarding

7.7

Food

6.7

Entertainment

6.9

Crew

8.2

Overall

7.6

Comfort

7.4

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
11,850 reviews
Finnair
7.6
Good
1,423 reviews
Check prices

Boarding

7.7

Food

6.7

Entertainment

6.9

Crew

8.2

Overall

7.6

Comfort

7.4

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
3,256 reviews
Finnair
7.6
Good
1,423 reviews
Check prices

Boarding

7.7

Food

6.7

Entertainment

6.9

Crew

8.2

Overall

7.6

Comfort

7.4

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
8,132 reviews
Finnair
7.6
Good
1,423 reviews
Check prices

Boarding

7.7

Food

6.7

Entertainment

6.9

Crew

8.2

Overall

7.6

Comfort

7.4

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?

    TAP AIR PORTUGAL, United Airlines, and Virgin Atlantic can get you from London to Key Largo in just under 18h 09m. Your travel time can differ by up to 16h 06m. London and Key Largo are separated by a distance of 4430 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 (£179), TAP AIR PORTUGAL (£252), and Aer Lingus (£294).

  • 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 (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 £351. On average you can expect to pay £2,075. The most popular route, (London Heathrow - Miami), can usually be booked for £408.

  • 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 25 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£270Average£400FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£299Average£424FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
DeltaCheapest£311Average£659FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
KLMCheapest£311Average£598FlexibilityNo cancel feeOn-time75%
Search KLM flights
Scandinavian AirlinesCheapest£313Average£375FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
A.P.G.Cheapest£325Average£396FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
SWISSCheapest£345Average£449FlexibilityNo cancel feeOn-time79%
Search SWISS flights
United AirlinesCheapest£358Average£548FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest£361Average£533FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£362Average£545FlexibilityNo 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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