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Cheap flights from London Heathrow Airport to Key West from £449

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — EYW
23 Apr — 30 Apr1
1 adult

Cheap flight deals from Heathrow to Key West

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Key West (EYW). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 18 April 2025.

Round-trip from

£449

Popular in

August

Cheapest in

March

Average price

£767
United Airlines
  • United Airlines
  • 8/5-14/5
  • 3 total stops
  • 39h 25m total
  • London to Key West
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£55 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Heathrow to Key West

Cheapest flights from Heathrow to Key West
Explore the most affordable flight options available from Heathrow to Key West. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 April 2025.

Thu 8/516:40LHR - EYW
2 stops25h 23mUnited Airlines
Wed 14/514:18EYW - LHR
1 stop14h 02mUnited Airlines
Deal found 17/4£449
Thu 8/506:15LHR - EYW
2 stops17h 34mBritish Airways
Wed 14/517:30EYW - LHR
1 stop12h 05mBritish Airways
Deal found 17/4£483
Thu 8/506:30LHR - EYW
2 stops18h 37mDelta
Wed 14/513:51EYW - LHR
2 stops15h 09mDelta
Deal found 17/4£503
Thu 8/509:55LHR - EYW
1 stop13h 54mMultiple Airlines
Wed 14/517:30EYW - LHR
1 stop10h 30mMultiple Airlines
Deal found 17/4£555
Thu 15/515:15LHR - EYW
1 stop31h 15mVirgin Atlantic
Sun 18/511:48EYW - LHR
1 stop13h 57mVirgin Atlantic
Deal found 17/4£561
Sun 1/616:00LHR - EYW
1 stop25h 53mBrussels Airlines
Sun 8/614:12EYW - LHR
1 stop34h 43mBrussels Airlines
Deal found 17/4£606
Sun 1/612:00LHR - EYW
1 stop29h 53mLufthansa
Sun 8/614:12EYW - LHR
1 stop34h 43mLufthansa
Deal found 17/4£617
Sun 1/608:55LHR - EYW
2 stops14h 54mIberia
Sun 8/613:24EYW - LHR
1 stop16h 11mIberia
Deal found 17/4£651
Sun 1/619:05LHR - EYW
2 stops20h 45mAmerican Airlines
Sun 8/611:20EYW - LHR
2 stops14h 00mAmerican Airlines
Deal found 17/4£668

Cheapflights Fare Finder

Customise your flight search to find flights from Heathrow to Key West 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 April 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Key West that are best for you.

Fly from

Heathrow

Fly to

Key West

Route

Depart

Return

Price

LondonKey West

LHR - EYW

LHREYW

London Heathrow

Thu 8/5

16:40-13:03

2 stops25h 23m

Key West

Wed 14/5

14:18-09:20

1 stop14h 02m

£449

LondonKey West

LHR - EYW

LHREYW

London Heathrow

Thu 8/5

06:15-18:49

2 stops17h 34m

Key West

Wed 14/5

17:30-10:35

1 stop12h 05m

£483

LondonKey West

LHR - EYW

LHREYW

London Heathrow

Thu 8/5

06:30-20:07

2 stops18h 37m

Key West

Wed 14/5

13:51-10:00

2 stops15h 09m

£503

LondonKey West

LHR - EYW

LHREYW

London Heathrow

Thu 8/5

09:55-18:49

1 stop13h 54m

Key West

Wed 14/5

17:30-09:00

1 stop10h 30m

£555

LondonKey West

LHR - EYW

LHREYW

London Heathrow

Thu 15/5

15:15-17:30

1 stop31h 15m

Key West

Sun 18/5

11:48-06:45

1 stop13h 57m

£561

LondonKey West

LHR - EYW

LHREYW

London Heathrow

Sun 1/6

16:00-12:53

1 stop25h 53m

Key West

Sun 8/6

14:12-05:55

1 stop34h 43m

£606

LondonKey West

LHR - EYW

LHREYW

London Heathrow

Sun 1/6

12:00-12:53

1 stop29h 53m

Key West

Sun 8/6

14:12-05:55

1 stop34h 43m

£617

LondonKey West

LHR - EYW

LHREYW

London Heathrow

Sun 1/6

08:55-18:49

2 stops14h 54m

Key West

Sun 8/6

13:24-10:35

1 stop16h 11m

£651

LondonKey West

LHR - EYW

LHREYW

London Heathrow

Sun 1/6

09:15-16:40

1 stop12h 25m

Key West

Sun 8/6

11:20-06:20

2 stops14h 00m

£668

LondonKey West

LHR - EYW

LHREYW

London Heathrow

Sun 1/6

21:45-18:05

3 stops49h 20m

£472

Flights are sorted by cheapest return flights first.

Deals found on 17/4

Showing 1-10 of 11 results
1
2

Best time to book a flight from Heathrow to Key West

Have a flexible travel schedule? Discover the best time to fly to Key West from Heathrow 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 Heathrow Airport to Key West

What is the cheapest time of day to fly from LHR to EYW?

Find hourly flight availability from Heathrow to Key West. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 April 2025.

When flying from London Heathrow Airport to Key West, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 21% versus a flight at midday.

Rainfall in Key West by month

Plan your trip to Key West by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Key West ranges from 38.0 - 170.0 inches per month. September is typically the wettest month, when rainfall can reach 170.0 mm. February is typically the driest time to visit Key West when rainfall is around 38.0 mm.

Temperature in Key West by month

Plan your trip to Key West by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Key West, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.0 C).

Reviews of airlines servicing Key West

Get insights into the airlines that provide service to Key West. 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 West. Reviews last updated 18 April 2025.
Delta
8.0
Very Good
7,917 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
Delta
8.0
Very Good
7,917 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
United Airlines
7.4
Good
8,667 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
Virgin Atlantic
7.4
Good
642 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
Brussels Airlines
7.4
Good
345 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Key West. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Key West from London Heathrow?

    Most people fly into Key West (EYW) if they book a flight to Key West from London Heathrow. On average, Key West has 0 inbound flights from London Heathrow per day from 3 airlines. Key West is conveniently located just 2.6 mi from Key West’s city center.

  • What are the cheapest airlines flying from London Heathrow Airport to Key West round-trip?

    Cheapflights users have booked flights from London Heathrow Airport to Key West round-trip from £449. Other airlines that can offer you cheap pricing are British Airways, from £483, and Delta, from £503. United Airlines is priced at 29% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Heathrow to Key West that include hotel bookings?

    Yes. In addition to deals on Heathrow to Key West flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Key West?

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

  • Can I find deals for business class flights from Heathrow to Key West?

    Yes. Cheapflights offers flight deals from Heathrow to Key West 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

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Alternative routes for Heathrow to Key West

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Top 3 airlines flying from Heathrow to Key West

Discover the top 3 airlines that operate flights from Heathrow to Key West. 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 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£435Average£637FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£455Average£563FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£537Average£808FlexibilityNo cancel feeOn-time76%
Search Finnair flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Heathrow to Key West?

Cheapflights helps you search for flights from Heathrow to Key West via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Key West?

Cheapflights simply makes it quick and affordable to book flights from Heathrow to Key West 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 Heathrow to Key West with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Heathrow to Key West flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Heathrow to Key West become cheaper?

Yes! Start tracking prices for Heathrow to Key West flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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