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$643+ Cheap flights from Key West (EYW) to Heathrow (LHR)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
EYW — LHR
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
1 adult, Economy
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Cheap flight deals from Key West to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Key West (EYW) to Heathrow (LHR). 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 June 30, 2025.

Round-trip from

$643
(Justfly.com)

Popular in

July

Cheapest in

September

Average price

$1,202
From Key West to London Heathrow
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($256 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($97 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find flight deals from Key West to Heathrow

Cheapest flights from Key West to Heathrow
Explore the most affordable flight options available from Key West to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.

This Justfly.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/191:29 pmEYW - LHR
1 stop14h 56mBritish Airways
Thu 8/289:55 amLHR - EYW
1 stop14h 12mBritish Airways
Deal found 6/28$643
This American Airlines deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/191:29 pmEYW - LHR
1 stop14h 56mAmerican Airlines
Thu 8/288:10 pmLHR - EYW
2 stops20h 36mAmerican Airlines
Deal found 6/29$659
This United Airlines deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/13:11 pmEYW - LHR
2 stops15h 39mUnited Airlines
Fri 10/3111:10 amLHR - EYW
2 stops30h 59mUnited Airlines
Deal found 6/29$717

Cheapflights Fare Finder

Customize your flight search to find flights from Key West to Heathrow 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 2,558,603 searches. Data last updated June 30, 2025.
Use the filters below to find and compare flights from Key West to London Heathrow Airport that are best for you.

Fly from

Key West

Fly to

Heathrow

Route

Depart

Return

Price

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 8/19

1:29 pm-9:25 am

1 stop14h 56m

London Heathrow

Thu 8/28

9:55 am-7:07 pm

1 stop14h 12m

$643

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 8/19

1:29 pm-9:25 am

1 stop14h 56m

London Heathrow

Thu 8/28

8:10 pm-11:46 am

2 stops20h 36m

$659

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 10/1

3:11 pm-11:50 am

2 stops15h 39m

London Heathrow

Fri 10/31

11:10 am-2:09 pm

2 stops30h 59m

$717

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

Best time to book a flight from Key West to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Key West with our price prediction graph.
Estimated round-trip 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 Key West to London Heathrow Airport

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

Find hourly flight availability from Key West to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 30, 2025.

It’s typically best to fly out from Key West to London Heathrow Airport in the morning. Doing so could potentially save you 62% on the flight price compared to flying at noon, which is usually more expensive.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated June 30, 2025.
Read through reviews of airlines operating flights from Key West to London Heathrow Airport, such as United Airlines, American Airlines, and British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,852 reviews

Entertainment

7.0

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,852 reviews
United Airlines
7.4
Good
8,852 reviews

Entertainment

7.0

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,852 reviews

Entertainment

7.0

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.6
Okay
7,081 reviews
United Airlines
7.4
Good
8,852 reviews

Entertainment

7.0

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Key West to Heathrow. 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 from for flights from Key West to London Heathrow?

    If you book a flight to London Heathrow from Key West, you will be flying from Key West, which is the city’s only airport. Key West (EYW) is located 2.6 mi from the center of Key West. There are 0 flights from Key West to London Heathrow per day from 0 different airlines.

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

    According to our current data, British Airways ($643), American Airlines ($659), and United Airlines ($717) offers the cheapest pricing from Key West to London Heathrow Airport. Users have found that British Airways is 44% cheaper than the other options available to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Key West to Heathrow 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 Key West to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Key West to London Heathrow Airport (average of $661). Flying from Key West to London Heathrow Airport in June is currently the most expensive (average of $1,098). 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

Traveling to a place near Key West?

Book flights to Key West if you plan to visit one of these locations
Hayes
Hounslow
Thornton Heath
Canterbury
Harrow
Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
Northampton
Croydon
Folkestone
Borehamwood
Broadway
Aylesbury
Chelmsford
Brentwood
Chichester
Swindon

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