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Cheap flights from Key West to London Heathrow Airport from £471

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/8. Fares are subject to change and may not be available on all flights or dates of travel.
EYW — LHR
13 Jul — 20 Jul1
1 adult

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 8 July 2025.

Round-trip from

£471

Popular in

July

Cheapest in

September

Average price

£1,491
British Airways
  • British Airways
  • 19/8-28/8
  • 2 total stops
  • 29h 08m total
  • Key West to London
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£138 potential increase over avg. return price).
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Cheapest flight prices on average. 9% potential price decrease (£53 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
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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 8 July 2025.

Tue 19/813:29EYW - LHR
1 stop14h 56mBritish Airways
Thu 28/809:55LHR - EYW
1 stop14h 12mBritish Airways
Deal found 7/7£471
Tue 19/811:26EYW - LHR
1 stop16h 59mAmerican Airlines
Thu 28/809:15LHR - EYW
2 stops14h 52mAmerican Airlines
Deal found 7/7£483
Tue 19/811:52EYW - LHR
2 stops15h 58mDelta
Thu 28/820:10LHR - EYW
2 stops19h 46mDelta
Deal found 7/7£516
Thu 21/810:02EYW - LHR
2 stops18h 58mMultiple Airlines
Thu 28/813:25LHR - EYW
3 stops28h 42mMultiple Airlines
Deal found 7/7£1,412

Cheapflights Fare Finder

Customise 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 858,174 searches. Data last updated 8 July 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 19/8

13:29-09:25

1 stop14h 56m

London Heathrow

Thu 28/8

09:55-19:07

1 stop14h 12m

£471

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 19/8

11:26-09:25

1 stop16h 59m

London Heathrow

Thu 28/8

09:15-19:07

2 stops14h 52m

£483

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 19/8

11:52-08:50

2 stops15h 58m

London Heathrow

Thu 28/8

20:10-10:56

2 stops19h 46m

£516

Key WestLondon

EYW - LHR

EYWLHR

Key West

Thu 21/8

10:02-10:00

2 stops18h 58m

London Heathrow

Thu 28/8

13:25-13:07

3 stops28h 42m

£1,412

Flights are sorted by cheapest return flights first.

Deals found on 7/7

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 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.

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 8 July 2025.
Check out reviews from past customers who have flown with Delta, American Airlines, andBritish Airways from Key West to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,962 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Delta
8.0
Very Good
7,962 reviews
Delta
8.0
Very Good
7,962 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
7,962 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
British Airways
6.6
Okay
7,095 reviews
Delta
8.0
Very Good
7,962 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

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?

    Key West (EYW), located 2.6 mi from the city center, is the airport you fly out of when you book flights from Key West to London Heathrow. 0 airlines have flights from Key West to London Heathrow on a regular basis. Booking flights from Key West to London Heathrow should not be difficult; the airport handles an average of 0 outbound flights to London Heathrow per day.

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

    Our cheapest airline available from Key West to London Heathrow Airport is British Airways. Our recent data shows that you can find tickets from as low as £471 on this airline. Additional options worth looking into are American Airlines and Delta, starting at £483 and £516 round-trip. British Airways is 44% cheaper than the average price of flights available within the next 90 days 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 holiday 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, January is the cheapest month in which you can book a flight from Key West to London Heathrow Airport (average of £112). Flying from Key West to London Heathrow Airport in August is currently the most expensive (average of £164). 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

Travelling to a place near Key West?

Book flights to Key West if you plan to visit one of these locations
Hounslow
Croydon
Milton Keynes
Deal
Northampton
Gatwick
Slough
Luton
Wembley
Crawley
Eastbourne
Ilford
Hayes
Ipswich
Folkestone
Southend-on-Sea
Watford
Winchester
Swindon
Maidstone

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Fly with Cheapflights

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

Deals for Key West to Heathrow 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 Key West to Heathrow?

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Need flexible booking options for your flight to Heathrow from Key West? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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