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Cheap flights from London to Key Largo from £360

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 17/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — MIA
4 Jan — 11 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London to Key Largo are usually found in September or May, booked 52 days in advance, depart on a Wednesday or Monday 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 5 December 2025.

Mon 8/1220:35LHR - MIA
1 stop29h 20mIcelandair
Sun 14/1217:15MIA - LHR
1 stop12h 35mIcelandair
Deal found 4/12£449
Wed 24/1212:05LHR - MIA
1 stop27h 49mUnited Airlines
Tue 13/114:32MIA - LHR
1 stop12h 53mUnited Airlines
Deal found 2/12£450
Thu 11/1213:25LHR - MIA
1 stop14h 04mAir Canada
Fri 9/108:00MIA - LHR
1 stop18h 10mAir Canada
Deal found 2/12£450
Sun 7/1210:40LGW - MIA
1 stop33h 10mTAP AIR PORTUGAL
Sun 18/123:50MIA - LGW
1 stop29h 00mTAP AIR PORTUGAL
Deal found 4/12£450
Tue 23/1213:45LHR - MIA
1 stop32h 45mUnited Airlines
Tue 6/118:25MIA - LHR
1 stop31h 15mUnited Airlines
Deal found 2/12£451
Fri 12/1214:30LHR - MIA
1 stop32h 09mAir Canada
Wed 7/118:40MIA - LHR
1 stop36h 10mAir Canada
Deal found 2/12£452
Thu 11/1211:55LGW - MIA
1 stop14h 00mIcelandair
Sun 18/117:15MIA - LGW
1 stop12h 40mIcelandair
Deal found 4/12£452
Mon 15/1213:25LHR - MIA
2 stops32h 17mAir Canada
Wed 7/121:05MIA - LHR
2 stops29h 05mAir Canada
Deal found 2/12£453
Tue 9/1211:15LHR - MIA
Nonstop9h 50mBritish Airways
Thu 8/116:54MIA - LHR
1 stop12h 41mBritish Airways
Deal found 2/12£454
Sun 14/1213:25LHR - MIA
1 stop14h 04mAir Canada
Thu 25/1212:20MIA - LHR
2 stops13h 50mAir Canada
Deal found 2/12£455
Wed 24/1213:25LHR - MIA
1 stop14h 04mAir Canada
Mon 12/121:05MIA - LHR
2 stops29h 05mAir Canada
Deal found 2/12£456
Wed 24/1207:40LHR - MIA
1 stop15h 55mUnited Airlines
Fri 9/109:05MIA - LHR
2 stops16h 15mUnited Airlines
Deal found 1/12£456

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 5 December 2025.

Round-trip from

£448

One-way from

£360

Popular in

December

Cheapest in

September

Average price

£627
Scandinavian Airlines
  • Scandinavian Airlines
  • 10/1-18/1
  • 3 total stops
  • 56h 45m total
  • London to Key Largo
Search Deals
15/12
  • 15/12
  • 2 total stops
  • 38h 03m total
  • London to Key Largo
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£17 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 5 December 2025.
Use the filters below to find and compare flights from London to Key Largo that are best for you.

Fly from

London

Fly to

Key Largo

Route

Depart

Return

Price

LondonMiami

STN - MIA

STNMIA

London Stansted

Fri 16/1

06:50-21:20

1 stop19h 30m

Miami

Fri 30/1

23:35-23:55

1 stop19h 20m

£453

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Mon 26/1

10:00-19:30

1 stop14h 30m

Miami

Fri 30/1

21:45-16:25

1 stop13h 40m

£456

LondonMiami

STN - MIA

STNMIA

London Stansted

Wed 25/2

07:40-20:00

1 stop17h 20m

Miami

Fri 6/3

17:15-17:30

2 stops19h 15m

£456

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Sun 8/2

10:00-19:30

1 stop14h 30m

Miami

Mon 23/2

21:45-16:25

1 stop13h 40m

£456

LondonMiami

STN - MIA

STNMIA

London Stansted

Tue 10/3

21:20-21:00

1 stop27h 40m

Miami

Fri 20/3

18:15-17:30

2 stops19h 15m

£457

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Tue 20/1

10:00-19:30

1 stop14h 30m

Miami

Fri 13/2

21:45-16:25

1 stop13h 40m

£459

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Sun 25/1

10:00-19:30

1 stop14h 30m

Miami

Tue 3/2

21:45-16:25

1 stop13h 40m

£459

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Tue 20/1

10:00-19:30

1 stop14h 30m

Miami

Thu 29/1

21:45-16:25

1 stop13h 40m

£459

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Sat 7/2

10:00-19:30

1 stop14h 30m

Miami

Mon 16/2

21:45-16:25

1 stop13h 40m

£459

LondonMiami

STN - MIA

STNMIA

London Stansted

Mon 9/2

12:00-14:21

2 stops31h 21m

Miami

Fri 20/2

21:45-07:15

1 stop28h 30m

£462

Flights are sorted by cheapest return flights first.

Deals found on 3/12

Showing 1-10 of 60 results
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2
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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

How far ahead should I book a flight from London to Key Largo?

Use this chart to determine the optimal time to book a return flight from London to Key Largo. Price data was last updated on 28 November 2025.

Booking 52 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Key Largo. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, May is the cheapest month in which you can book a flight from London to Key Largo (average of £231). Flying from London to Key Largo in July is currently the most expensive (average of £354). 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 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 5 December 2025.

A simple way to save on the total cost of your ticket is to fly from London to Key Largo at midday. If you’re flexible enough to do this you can expect to save up to 12% on your trip compared to booking a flight in the evening.

What is the cheapest day to fly from London to Key Largo?

Use this chart to determine the cheapest time to fly return from London to Key Largo. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London to Key Largo flight should consider departing on Monday evenings when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 5 December 2025.

The most flights from LON to KE9 are scheduled on a Monday (24 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (24 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 5 December 2025.
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
1,334 reviews
Check prices

Comfort

7.4

Food

6.7

Crew

8.1

Boarding

7.6

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Finnair
7.6
Good
1,334 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Comfort

7.4

Food

6.7

Crew

8.1

Boarding

7.6

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Virgin Atlantic
7.5
Good
675 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Comfort

7.4

Food

6.7

Crew

8.1

Boarding

7.6

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Norse Atlantic UK
7.2
Good
Finnair
7.6
Good
1,334 reviews
Check prices

Comfort

7.4

Food

6.7

Crew

8.1

Boarding

7.6

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
TAP AIR PORTUGAL
7.1
Good
2,081 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Comfort

7.4

Food

6.7

Crew

8.1

Boarding

7.6

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
British Airways
6.7
Okay
7,562 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Comfort

7.4

Food

6.7

Crew

8.1

Boarding

7.6

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

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, United Airlines, and Delta can get you from London to Key Largo in just under 10h 25m. Your travel time can differ by up to 4h 05m. 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 (£149), Scandinavian Airlines (£177), and A.P.G. (£217).

  • 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 City - 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: Air France (89%), Delta (89%), Virgin Atlantic (89%).

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

    The cheapest flight price from London to Key Largo is £313. On average you can expect to pay £1,600. The most popular route, (London Heathrow - Miami), can usually be booked for £334.

  • 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.

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

    Currently, May is the cheapest month in which you can book a flight from London to Key Largo (average of £231). Flying from London to Key Largo in July is currently the most expensive (average of £354). 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

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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 5 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£278Average£417FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
DeltaCheapest£297Average£629FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IcelandairCheapest£299Average£393FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
SWISSCheapest£301Average£473FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Scandinavian AirlinesCheapest£312Average£370FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£331Average£486FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
A.P.G.Cheapest£345Average£549FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
United AirlinesCheapest£347Average£515FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£347Average£474FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air EuropaCheapest£356Average£436FlexibilityNo cancel feeOn-time83%
Search Air Europa 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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