LHR - SLU

£502 Find Cheap Flights from London Heathrow Airport to Castries

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Castries departing on 23/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Castries

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Castries, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Castries, as well as popular online travel agencies
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Everything you should know

Cheapest return fare
£734
Multiple Airlines
Fri 30/1Fri 6/2
LHR - SLU • 1 stop
Cheapest one-way flight
£502
Multiple Airlines
Mon 23/3
LHR - SLU • 2 stops
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Castries!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Heathrow to Castries (LHR-SLU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow to Castries that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Heathrow to Castries

Fri, 30 Jan - Fri, 6 Feb
Multiple Airlines Logo
09:40 - 19:00
LHR
-
SLU
13h 20m1 stop
Multiple Airlines Logo
15:45 - 09:55
SLU
-
LHR
14h 10m1 stop
£734Multiple Airlines
Fri, 6 Feb - Sun, 15 Feb
Multiple Airlines Logo
09:40 - 15:15
LHR
-
SLU
33h 35m1 stop
Multiple Airlines Logo
15:45 - 09:55
SLU
-
LHR
14h 10m1 stop
£747Multiple Airlines
Wed, 25 Feb - Wed, 11 Mar
Multiple Airlines Logo
13:25 - 15:15
LHR
-
SLU
29h 50m1 stop
Multiple Airlines Logo
12:35 - 05:50
SLU
-
LHR
13h 15m1 stop
£748Multiple Airlines
Wed, 25 Feb - Wed, 11 Mar
Multiple Airlines Logo
13:25 - 19:00
LHR
-
SLU
33h 35m1 stop
Multiple Airlines Logo
12:35 - 05:50
SLU
-
LHR
13h 15m1 stop
£750Multiple Airlines
Fri, 30 Jan - Fri, 6 Feb
Multiple Airlines Logo
19:25 - 19:00
LHR
-
SLU
27h 35m2 stops
Multiple Airlines Logo
12:35 - 05:25
SLU
-
LHR
12h 50m1 stop
£755Multiple Airlines
Wed, 21 Jan - Wed, 4 Feb
Multiple Airlines Logo
13:25 - 15:15
LHR
-
SLU
29h 50m1 stop
Multiple Airlines Logo
15:45 - 08:30
SLU
-
LHR
12h 45m1 stop
£757Multiple Airlines
Wed, 21 Jan - Wed, 4 Feb
Multiple Airlines Logo
13:25 - 15:15
LHR
-
SLU
29h 50m1 stop
Multiple Airlines Logo
15:45 - 08:30
SLU
-
LHR
12h 45m1 stop
£758Multiple Airlines
Thu, 26 Feb - Thu, 26 Mar
Multiple Airlines Logo
13:20 - 15:15
LHR
-
SLU
29h 55m1 stop
Multiple Airlines Logo
15:45 - 09:35
SLU
-
LHR
13h 50m1 stop
£770Multiple Airlines
Thu, 5 Feb - Sun, 15 Feb
Multiple Airlines Logo
13:25 - 15:15
LHR
-
SLU
29h 50m1 stop
Multiple Airlines Logo
15:45 - 08:30
SLU
-
LHR
12h 45m1 stop
£775Multiple Airlines
Sun, 1 Mar - Thu, 26 Mar
Multiple Airlines Logo
08:00 - 19:00
LHR
-
SLU
15h 00m1 stop
Multiple Airlines Logo
15:45 - 09:35
SLU
-
LHR
13h 50m1 stop
£777Multiple Airlines
Booking Insights

KAYAK's insights & trends for Heathrow to Castries flights

Get data-powered insights and trends into flights from Heathrow to Castries to help you find the cheapest flights, the best time to fly and much more.

Which airlines fly direct between London Heathrow Airport and Castries?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from London Heathrow Airport to Castries.

There is just one airline that flies from London Heathrow Airport to Castries direct and that is British Airways. The best return deal found from British Airways for the route is £473.

Good to know - Cheap tickets from London Heathrow Airport to Castries

Cheapest flight£502
Flight from London Heathrow Airport to Castries

When to book flights from Heathrow to Castries

Are your dates flexible? Find out the best times to travel from Heathrow to Castries based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking London Heathrow Airport to Castries flights

  • What is the cheapest flight from London Heathrow Airport to Castries?

    In the last 3 days, the lowest price for a flight from London Heathrow Airport to Castries was £502 for a one-way ticket and £734 for a return.

  • Which aircraft models fly most regularly from London Heathrow Airport to Castries?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from London Heathrow Airport to Castries?

    oneworld is the only airline alliance operating flights between London Heathrow Airport and Castries.

  • How does KAYAK find such low prices on flights from London Heathrow Airport to Castries?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London Heathrow Airport to Castries.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Heathrow Airport to Castries?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Castries from London Heathrow Airport is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London Heathrow Airport to Castries?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Castries with an airline and back to London Heathrow Airport with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London Heathrow Airport to Castries?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Castries from London Heathrow Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Heathrow to Castries

 
See real verified KAYAK customer reviews for airlines flying from London to Castries. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Heathrow to Castries? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.7
British AirwaysOverall score based on 7585 reviews
6.4Entertainment
7.6Crew
6.9Boarding
6.4Food
6.7Comfort
Airline reviews

People were nice. Seats are so cramped my knees had to be pressed into the seat in front of me.

6.0 GoodTravis, Dec 2025
LHR - DUB
Read more British Airways reviews

People were nice. Seats are so cramped my knees had to be pressed into the seat in front of me.

Overall, the food and entertainment were great. The staff were amazing, polite and professional. They did not have WiFi on board on this leg but that was okay. There was a delay in boarding from London and landing at Mumbai airport but the pilot communicate DC the reason for the delayed landing. They even sent us an apology afterwards for the delayed landing.

I was in a bulkhead seat and my tray table wasn't level. Eating was difficult.

Nice lounge but had a 5 hour layover which is a lot

Flight on time and priority boarding worked. I travelled economy although business was available as no flights are cheap these days and at least with BA loyalty card I get a baggage allowance for nothing. That made the flight comparable or even cheaper than the ‘budget’ alternative. As for catering and entertainment - not on a BA short haul economy ! At least we were offered biscuits and water! Catering for economy short haul has been reduced to the minimum - no tea or coffee or other drinks than water (from a large bottle with a paper cup on offer). They will say this is better for the environment, which it is, but proper waste management is still needed for empty packets etc. so actually it’s a money saver.

Audi visual not working for a whole group of seats in first class. How does a plane leave the main hub in such poor condition? How much that we can’t see so immediately is also compromised?

main meals are horrible but then you dont fly for the food

It was good. Couldn’t Check in online and select seats

It was great. Enough space and room for legs . Great service to.

⭐ British Airways Review — A Journey of Highs, Lows, and Lessons ⭐ I recently flew Business Class round-trip from Boston to Mumbai with British Airways, and my experience was a tale of two extremes — from disappointment to exceptional service, and then back to inconsistency. Boston → London: A Surprisingly Poor Start My journey began on a disappointing note. On a 6-hour Business Class flight, I was surprised to discover that there wasn’t a single proper vegetarian meal option available. I was offered a few bakery items only after repeatedly requesting something to eat. The flight attendant shrugged, offered no solution, and eventually — quite literally — threw some bread at me after much delay. This was not only disheartening, it was extremely surprising given my wonderful Business Class experience with BA last year. I stepped off that flight genuinely hungry and had to make a mad dash to the lounge just to get a proper meal. London → Mumbai: A Complete Turnaround The next sector restored my faith in British Airways. The entire crew was warm, welcoming, attentive, and genuinely caring. A special shoutout to Phiroze and the entire team serving the Business Class cabin — their professionalism, hospitality, and thoughtful service were extraordinary. They truly embodied what makes British Airways a global leader, and I am deeply grateful for the experience they provided. This is the BA I know and love. Mumbai → London: A Strange Meal Schedule This sector was generally fine, but the meal timing was puzzling. Lunch at 10:30 AM — for a Business cabin — felt unusual, and most passengers, including myself, barely touched it. The rest of the service was smooth, but the scheduling definitely needs a rethink. London → Boston: Mixed Experience Again The flight itself was decent, but the Business Lounge at Heathrow for this leg was a letdown. Arrived during lunch hours: no hot vegetarian options available Lounge area: dirty dishes everywhere Even after politely alerting the staff, the dishes were ignored and left uncleared For a premium cabin passenger — and at one of the world’s busiest international hubs — this was disappointing. Overall Impression My journey with British Airways felt inconsistent — two great sectors sandwiched between two that fell short of the BA standard. When BA is good, it is world-class. When it misses, the gap is noticeable. I genuinely hope the airline takes this feedback as constructive insight. I continue to believe in British Airways, and I commend the outstanding crew on the London → Mumbai sector — they were the highlight of my entire trip. With a little more focus on vegetarian meal availability, lounge service, and consistency across crews, BA can ensure every Business Class passenger experiences the premium journey they promise.

Everything you need to know for your flight from Heathrow to Castries

Information on your arrival and departure airports