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Cheap flights from London Heathrow Airport to Saint Lucia from £419

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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
8 Feb — 15 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Saint Lucia

Keep the following information in mind while searching for Heathrow to Saint Lucia flight deals. Data was last updated 9 January 2026.

Round-trip from

£646

One-way from

£416

Popular in

April

Cheapest in

November

Average price

£644
JetBlue
  • JetBlue
  • 3/3-7/3
  • 2 total stops
  • 68h 51m total
  • London to Saint Lucia
Search Deals
JetBlue
  • JetBlue
  • 8/2
  • 1 total stop
  • 36h 08m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£190 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 17% potential price decrease (£86 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Find flight deals from Heathrow to Saint Lucia

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Saint Lucia
Explore the most affordable flight options available from Heathrow to Saint Lucia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 January 2026.

Sun 8/207:45LHR - UVF
1 stop36h 08mJetBlue
Sun 15/217:03UVF - LHR
1 stop23h 42mJetBlue
Deal found 9/1£627
Fri 23/113:45LHR - UVF
2 stops54h 40mAir Canada
Thu 5/217:15UVF - LHR
2 stops36h 05mAir Canada
Deal found 8/1£643
Tue 3/307:25LHR - UVF
1 stop36h 36mJetBlue
Sat 7/318:40UVF - LHR
1 stop32h 15mJetBlue
Deal found 7/1£646
Wed 14/111:10LHR - UVF
1 stop33h 15mAir Canada
Wed 21/117:15UVF - LHR
1 stop35h 15mAir Canada
Deal found 8/1£649
Sat 6/609:20LHR - SLU
1 stop14h 40mMultiple Airlines
Sat 20/615:45SLU - LHR
1 stop12h 35mMultiple Airlines
Deal found 7/1£650
Mon 19/119:25LHR - UVF
2 stops48h 55mAir Canada
Thu 29/117:15UVF - LHR
1 stop33h 15mAir Canada
Deal found 8/1£651
Wed 4/209:00LHR - UVF
2 stops35h 25mAir Canada
Wed 11/217:15UVF - LHR
2 stops33h 55mAir Canada
Deal found 7/1£652
Thu 5/309:00LHR - UVF
2 stops35h 25mAir Canada
Thu 12/316:15UVF - LHR
2 stops34h 55mAir Canada
Deal found 8/1£657
Sun 18/118:00LHR - UVF
1 stop26h 25mAir Canada
Wed 18/316:15UVF - LHR
1 stop36h 15mAir Canada
Deal found 8/1£658
Sat 25/409:20LHR - SLU
1 stop14h 40mMultiple Airlines
Sat 2/515:45SLU - LHR
1 stop12h 35mMultiple Airlines
Deal found 8/1£663
Fri 6/209:40LHR - SLU
1 stop30h 25mMultiple Airlines
Mon 16/216:20SLU - LHR
1 stop13h 15mMultiple Airlines
Deal found 8/1£669
Fri 29/509:20LHR - SLU
1 stop14h 40mMultiple Airlines
Mon 8/615:45SLU - LHR
1 stop12h 35mMultiple Airlines
Deal found 7/1£680

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Saint Lucia 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 January 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Saint Lucia that are best for you.

Fly from

Heathrow

Fly to

Saint Lucia

Route

Depart

Return

Price

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 6/2

09:40-12:05

1 stop30h 25m

Castries George F. L. Charle

Mon 16/2

16:20-09:35

1 stop13h 15m

£669

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 23/1

09:20-15:20

1 stop34h 00m

Castries Hewanorra

Thu 5/2

17:21-20:45

1 stop23h 24m

£669

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 21/1

11:10-16:25

1 stop33h 15m

Castries Hewanorra

Wed 28/1

17:15-11:20

1 stop14h 05m

£673

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 11/2

09:00-16:25

2 stops35h 25m

Castries Hewanorra

Wed 18/2

17:15-11:20

1 stop14h 05m

£678

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 29/5

09:20-19:00

1 stop14h 40m

Castries George F. L. Charle

Mon 8/6

15:45-09:20

1 stop12h 35m

£680

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 5/3

13:20-19:00

1 stop33h 40m

Castries George F. L. Charle

Thu 12/3

15:45-09:35

1 stop13h 50m

£683

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 23/4

08:30-15:20

1 stop35h 50m

Castries Hewanorra

Fri 1/5

15:15-06:35

1 stop34h 20m

£697

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 23/4

12:05-15:20

1 stop32h 15m

Castries Hewanorra

Thu 30/4

16:15-08:35

1 stop35h 20m

£697

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 19/1

19:25-16:20

2 stops48h 55m

Castries Hewanorra

Mon 2/2

17:15-07:10

2 stops33h 55m

£699

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 25/2

09:40-19:00

1 stop13h 20m

Castries George F. L. Charle

Wed 11/3

12:35-05:25

1 stop12h 50m

£704

Flights are sorted by cheapest return flights first.

Deals found on 7/1

Showing 1-10 of 33 results
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Best time to book a flight from Heathrow to Saint Lucia

Have a flexible travel schedule? Discover the best time to fly to Saint Lucia 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 Saint Lucia

What is the cheapest month to book a flight from London Heathrow Airport to Saint Lucia?

Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £378). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £748). 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.

How often are flights from London to Saint Lucia delayed?

About 18% of weekly flights between London and Saint Lucia have experienced delays in the past year, with the average delay time being 150 minutes.

What is the most punctual flight time for London to Saint Lucia flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Wednesday tends to have the lowest number of delays on this route, whereas Monday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Saint Lucia flights?

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 16% of flights being delayed.

Reviews of airlines servicing Saint Lucia

Get insights into the airlines that provide service to Saint Lucia. 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 Saint Lucia. Reviews last updated 9 January 2026.
Read reviews from past customers who have flown with KLM, Finnair, andVirgin Atlantic from London Heathrow Airport to Saint Lucia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,434 reviews
Check prices

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.2

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,434 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.2

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Finnair
7.6
Good
1,346 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.2

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Virgin Atlantic
7.5
Good
678 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.2

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Air Canada
7.1
Good
10,603 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.2

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
British Airways
6.7
Okay
7,659 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.2

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Saint Lucia. 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 Heathrow Airport to Saint Lucia?

    Air Canada can get you from London Heathrow Airport to Saint Lucia in just under 54h 40m. Your travel time can differ by up to . The distance between London Heathrow Airport and Saint Lucia is about 4217 mi.

  • Can I find deals for flights from Heathrow to Saint Lucia that include hotel bookings?

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

  • How can I find direct flights from Heathrow to Saint Lucia?

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

  • Can I find deals for business class flights from Heathrow to Saint Lucia?

    Yes. Cheapflights offers flight deals from Heathrow to Saint Lucia 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 Heathrow Airport to Saint Lucia?

    Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £378). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £748). 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 Heathrow to Saint Lucia

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Bridgetown flights
Heathrow to Montego Bay flights
London City to Bridgetown flights
Heathrow to Kingston flights
Heathrow to Punta Cana flights
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Gatwick to Bridgetown flights
Heathrow to Nassau flights
Heathrow to Port of Spain flights
Gatwick to Montego Bay flights
Heathrow to St. George's flights
Gatwick to St. John's flights
Heathrow to Castries flights
London City to Montego Bay flights
Heathrow to St. John's flights
Gatwick to Castries flights
Gatwick to Kingston flights
Stansted to Bridgetown flights
London City to Kingston flights
London City to Punta Cana flights
Stansted to Montego Bay flights
Heathrow to Luis Munoz Marin Intl flights
Gatwick to Port of Spain flights
Stansted to Punta Cana flights
Luton to Punta Cana flights
Stansted to Kingston flights
Gatwick to Luis Munoz Marin Intl flights
Heathrow to Castries flights
Gatwick to Nassau flights
London City to Castries flights
London City to Luis Munoz Marin Intl flights
Heathrow to Kingstown flights
Luton to Montego Bay flights
London City to St. John's flights
Heathrow to Santo Domingo flights
Gatwick to St. George's flights
Heathrow to George Town flights
Heathrow to Basseterre flights
Gatwick to Havana flights
Heathrow to Road Town flights
Stansted to Luis Munoz Marin Intl flights
Heathrow to Roseau flights
Heathrow to Oranjestad flights
Gatwick to Santo Domingo flights
Gatwick to Basseterre flights
Stansted to Port of Spain flights
Heathrow to Providenciales flights
Gatwick to Road Town flights
Heathrow to Pointe-à-Pitre flights
Stansted to Santo Domingo flights

Top 5 airlines flying from Heathrow to Saint Lucia

Discover the top 5 airlines that operate flights from Heathrow to Saint Lucia. 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 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£371Average£502FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£458Average£680FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£518Average£665FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£642Average£822FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£1,074Average£1,501FlexibilityNo cancel feeOn-time75%
Search KLM 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 Heathrow to Saint Lucia?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Saint Lucia. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Saint Lucia?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Heathrow to Saint Lucia for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Heathrow to Saint Lucia with no change fees?

Yes! Cheapflights helps users easily find flights from Heathrow to Saint Lucia with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Saint Lucia become cheaper?

Yes! Start tracking prices for Heathrow to Saint Lucia 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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