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Cheap flights from the United Kingdom to Key Largo from £256

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 15/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — MIA
11 Mar — 18 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to Key Largo

Enter your travel dates to find the best prices.

Cheapest flights from United Kingdom to Key Largo
Explore the most affordable flight options available from United Kingdom to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 February 2026.

Tue 3/314:30
LHR
-
MIA
Nonstop10h 00m
British Airways
Tue 24/323:00
MIA
-
LHR
Nonstop8h 30m
British Airways
Deal found 7/2£375
Tue 10/212:05
LHR
-
MIA
1 stop34h 25m
SWISS
Tue 24/219:50
MIA
-
LHR
1 stop12h 10m
SWISS
Deal found 4/2£377
Tue 1/1211:55
LGW
-
MIA
1 stop14h 00m
Icelandair
Fri 18/1217:15
MIA
-
LGW
1 stop12h 40m
Icelandair
Deal found 8/2£382
Thu 5/1111:55
LGW
-
MIA
1 stop14h 00m
Icelandair
Sun 8/1117:15
MIA
-
LGW
1 stop12h 40m
Icelandair
Deal found 8/2£383
Mon 6/409:15
LHR
-
MIA
1 stop16h 10m
Iberia
Mon 20/422:10
MIA
-
LHR
1 stop15h 05m
Iberia
Deal found 5/2£383
Tue 10/311:55
LGW
-
MIA
1 stop14h 00m
Icelandair
Wed 25/318:15
MIA
-
LGW
1 stop12h 40m
Icelandair
Deal found 5/2£383
Thu 7/515:35
LHR
-
MIA
Nonstop9h 35m
British Airways
Thu 14/522:40
MIA
-
LHR
Nonstop8h 55m
British Airways
Deal found 5/2£386
Sat 21/1111:55
LGW
-
MIA
1 stop14h 00m
Icelandair
Fri 4/1217:15
MIA
-
LGW
1 stop12h 40m
Icelandair
Deal found 5/2£386
Fri 27/220:35
LHR
-
MIA
2 stops29h 57m
Multiple Airlines
Wed 4/313:21
MIA
-
LHR
2 stops16h 29m
Multiple Airlines
Deal found 5/2£388
Thu 5/1112:15
LHR
-
MIA
1 stop13h 40m
Icelandair
Sun 22/1117:15
MIA
-
LHR
1 stop21h 15m
Icelandair
Deal found 7/2£391
Mon 23/212:00
LHR
-
MIA
1 stop15h 19m
United Airlines
Mon 2/314:15
MIA
-
LHR
1 stop16h 00m
United Airlines
Deal found 6/2£393
Sun 25/1018:40
LHR
-
MIA
1 stop28h 25m
Scandinavian Airlines
Mon 16/1119:55
MIA
-
LHR
1 stop32h 25m
Scandinavian Airlines
Deal found 5/2£394

Find flight deals from United Kingdom to Key Largo

Keep the following information in mind while searching for United Kingdom to Key Largo flight deals. Data was last updated 9 February 2026.

Round-trip from

£375

One-way from

£256

Popular in

December

Cheapest in

September

Average price

£458
British Airways
  • British Airways
  • 3/3-24/3
  • Nonstop
  • 18h 30m total
  • United Kingdom to Key Largo
Search Deals
15/4
  • 15/4
  • 3 total stops
  • 31h 19m total
  • United Kingdom to Key Largo
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£16 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from United Kingdom 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 9 February 2026.
Use the filters below to find and compare flights from the United Kingdom to Key Largo that are best for you.

Fly from

United Kingdom

Fly to

Key Largo

Route

Depart

Return

Price

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 17/3

12:15-21:55

1 stop13h 40m

Miami

Wed 25/3

18:15-10:50

1 stop12h 35m

£410

GlasgowMiami

GLA - MIA

GLAMIA

Glasgow Intl

Tue 17/3

18:35-21:00

2 stops30h 25m

Miami

Sun 29/3

18:15-13:25

1 stop14h 10m

£443

LondonMiami

LTN - MIA

LTNMIA

London Luton

Tue 17/3

07:30-20:30

2 stops41h 00m

Miami

Tue 24/3

22:45-21:45

2 stops19h 00m

£444

Newcastle upon TyneMiami

NCL - MIA

NCLMIA

Newcastle upon Tyne

Sat 18/4

09:55-20:15

1 stop15h 20m

Miami

Sun 26/4

22:40-15:30

1 stop11h 50m

£445

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Mon 13/4

15:40-21:55

1 stop35h 15m

Miami

Fri 24/4

18:15-14:40

1 stop15h 25m

£448

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 10/3

06:00-15:50

1 stop13h 50m

Miami

Fri 20/3

00:35-18:55

1 stop14h 20m

£451

EdinburghMiami

EDI - MIA

EDIMIA

Edinburgh Turnhouse

Wed 11/3

06:15-21:00

1 stop18h 45m

Miami

Wed 25/3

18:15-10:00

1 stop11h 45m

£456

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Thu 26/2

10:00-19:30

1 stop14h 30m

Miami

Tue 10/3

22:45-16:25

1 stop13h 40m

£459

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Fri 27/2

10:00-19:30

1 stop14h 30m

Miami

Wed 4/3

21:45-16:25

1 stop13h 40m

£459

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Sat 28/2

10:00-19:30

1 stop14h 30m

Miami

Thu 5/3

21:45-16:25

1 stop13h 40m

£459

Flights are sorted by cheapest return flights first.

Deals found on 7/2

Showing 1-10 of 60 results
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Best time to book a flight from United Kingdom to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from United Kingdom 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 the United Kingdom to Key Largo

What is the cheapest month to book a flight from United Kingdom to Key Largo?

Currently, May is the cheapest month in which you can book a flight from United Kingdom to Key Largo (average of £226). Flying from United Kingdom to Key Largo in January is currently the most expensive (average of £350). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Find hourly flight availability from United Kingdom 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 9 February 2026.

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

Weekly flight availability from United Kingdom to Key Largo

Explore weekly flight availability from United Kingdom 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 9 February 2026.

The most flights from GB0 to KE9 are scheduled on a Saturday (30 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (14 on average).

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 9 February 2026.
Read through reviews of airlines operating flights from the United Kingdom 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
1,357 reviews
Check prices

Entertainment

6.9

Overall

7.6

Comfort

7.5

Boarding

7.7

Crew

8.2

Food

6.7

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
1,357 reviews
Finnair
7.6
Good
1,357 reviews
Check prices

Entertainment

6.9

Overall

7.6

Comfort

7.5

Boarding

7.7

Crew

8.2

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Virgin Atlantic
7.5
Good
678 reviews
Finnair
7.6
Good
1,357 reviews
Check prices

Entertainment

6.9

Overall

7.6

Comfort

7.5

Boarding

7.7

Crew

8.2

Food

6.7

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
7.3
Good
Finnair
7.6
Good
1,357 reviews
Check prices

Entertainment

6.9

Overall

7.6

Comfort

7.5

Boarding

7.7

Crew

8.2

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
TAP AIR PORTUGAL
7.1
Good
2,135 reviews
Finnair
7.6
Good
1,357 reviews
Check prices

Entertainment

6.9

Overall

7.6

Comfort

7.5

Boarding

7.7

Crew

8.2

Food

6.7

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
7,721 reviews
Finnair
7.6
Good
1,357 reviews
Check prices

Entertainment

6.9

Overall

7.6

Comfort

7.5

Boarding

7.7

Crew

8.2

Food

6.7

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 United Kingdom 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 United Kingdom to Key Largo?

    Airlines like Icelandair, British Airways, and TAP AIR PORTUGAL fly from United Kingdom to Key Largo in about 13h 40m. The time it takes to get you to your destination can typically vary by up to 1h 40m. United Kingdom and Key Largo are separated by a distance of 4414 mi. This flight may include one or multiple stops.

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

    The cheapest airline one-way is Norse Atlantic UK, with whom users have recently found tickets for as low as £146. However, be on the lookout for offers from Vueling and LEVEL, as they are both options that can get you from United Kingdom to Key Largo for a low price.

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

    The most popular route from United Kingdom to Key Largo is London Heathrow - Miami. You may also consider London Gatwick - Miami or London Stansted - Miami.

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

    Consider Malaysia Airlines (90%), KLM (82%) or Air France (82%) when booking your flight. These represent the most reliable airlines when flying from United Kingdom to Key Largo.

  • What are the cheapest flights from United Kingdom to Key Largo?

    On average you can expect to pay £1,592 for a flight from United Kingdom to Key Largo. The cheapest flight overall is £349 while the most popular route, (London Heathrow - Miami) is currently priced at £340.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from United Kingdom 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.

  • What is the cheapest month to book a flight from United Kingdom to Key Largo?

    Currently, May is the cheapest month in which you can book a flight from United Kingdom to Key Largo (average of £226). Flying from United Kingdom to Key Largo in January is currently the most expensive (average of £350). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for United Kingdom 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 United Kingdom to Key Largo

Discover the top 10 airlines that operate flights from United Kingdom 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 9 February 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£214Average£622FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Norse Atlantic UKCheapest£270Average£404FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£293Average£434FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
SWISSCheapest£295Average£354FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Scandinavian AirlinesCheapest£306Average£382FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£322Average£505FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
A.P.G.Cheapest£338Average£539FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
LufthansaCheapest£340Average£564FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£345Average£533FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£346Average£612FlexibilityNo cancel feeOn-time69%
Search United Airlines 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 United Kingdom to Key Largo?

When you search for this flight from United Kingdom to Key Largo, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights simply makes it quick and affordable to book flights from United Kingdom to Key Largo by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from United Kingdom to Key Largo, users can toggle the no change fees filter when performing a flight search.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Key Largo from United Kingdom today and book when prices fit your budget.

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