LON - SLU

£415 Find Cheap Flights from London 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 London to Castries departing on 11/9. 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

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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Flight Deals

Cheap Flights from London to Castries (LON-SLU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from London 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 London to Castries

Thu, 18 Sep - Thu, 2 Oct
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08:05 - 14:35LHR-SLU
11h 30m1 stop
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15:20 - 07:50SLU-LHR
11h 30m1 stop
Sat, 8 Nov - Sun, 16 Nov
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08:00 - 11:25LHR-SLU
31h 25m1 stop
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12:10 - 09:55SLU-LHR
17h 45m1 stop
Sat, 17 Jan - Sun, 25 Jan
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08:00 - 11:25LHR-SLU
31h 25m1 stop
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12:10 - 05:25SLU-LHR
13h 15m1 stop
Tue, 7 Oct - Tue, 14 Oct
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11:25 - 19:00LHR-SLU
12h 35m1 stop
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12:35 - 06:20SLU-LHR
12h 45m1 stop
Wed, 1 Oct - Mon, 6 Oct
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13:05 - 13:10LGW-SLU
29h 05m2 stops
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16:35 - 06:20SLU-LGW
32h 45m2 stops
Fri, 21 Nov - Mon, 1 Dec
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08:50 - 11:45LHR-SLU
54h 55m3 stops
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16:35 - 20:10SLU-LHR
23h 35m2 stops
Mon, 15 Sep - Wed, 24 Sep
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11:25 - 15:15LHR-SLU
32h 50m1 stop
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09:10 - 06:20SLU-LHR
16h 10m1 stop
Thu, 18 Sep - Thu, 2 Oct
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13:25 - 11:30LHR-SLU
27h 05m3 stops
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18:20 - 09:05SLU-LHR
33h 45m3 stops
Fri, 7 Nov - Sun, 16 Nov
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17:50 - 22:10LHR-SLU
32h 20m3 stops
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09:10 - 10:45SLU-LHR
21h 35m3 stops
Sat, 4 Oct - Sat, 11 Oct
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09:50 - 11:45LHR-SLU
30h 55m3 stops
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18:20 - 08:00SLU-LHR
32h 40m3 stops
Booking Insights

KAYAK's insights & trends for London to Castries flights

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

How much is a return flight from London to Castries?

What is the cheapest month to fly from London to Castries?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London to Castries, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London to Castries is September, where tickets cost £477 (return) on average. On the other hand, the most expensive months are December and April, where the average cost of round-trip tickets is £983 and £789 respectively.

Good to know - Cheap tickets from London to Castries

Low seasonSeptember
Cheapest flight£415
Best time to beat the crowds (21% less expensive on average)
Most popular time to fly and prices are also 17% lower on average.
Flight from London Heathrow Airport to Castries

When to book flights from London to Castries

Are your dates flexible? Find out the best times to travel from London 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 flights from London to Castries

  • What is the cheapest flight from London to Castries?

    In the last 3 days, the lowest price for a flight from London to Castries was £560 for a one-way ticket and £886 for a return.

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

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

  • How does KAYAK find such low prices on flights from London 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 to Castries.

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

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

  • What is the Hacker Fare option on flights from London 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 with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London 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 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 London 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 London 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 7305 reviews
6.3Food
6.7Comfort
6.4Entertainment
7.6Crew
6.9Boarding
Airline reviews

We missed the connection because we had to wait for a shuttle from the plane to the Terminal. Also, we needed assistance and none was available.

4.0 OkayAnonymous, Aug 2025LHR - BOS
Read more British Airways reviews

We missed the connection because we had to wait for a shuttle from the plane to the Terminal. Also, we needed assistance and none was available.

When we arrived at the airport - 1st step - printing out your boarding pass - no issue. Not long lines as these machines. 2nd step - processing your bag drop off. There was only one associate there to help 10 kiosks. We had a family in front of us for 20 minutes trying to work on the machine and figure out every step for 4 pieces of luggage. My husband alerted the associate who was able to assist the family. Highly suggest that there are more associates to assist in this process. Besides this issue, security check went very quickly. Our flight was direct to Philadelphia. We had to carry our bags down two flights of steps, then out to the tarmac to a bus, then carry our bags up two flights of stairs to the plane. No one on the flight was expecting that long trek. I could see some people were struggling a bit. All in all - great flight crew, plane was clean and food was great!

The space is tight. Either you sit straight up the whole time, but the minute you relax, your knees hit the back of the seat in front of you. My seat would not recline so I was quite uncomfortable. Didn’t use my tray table bc it was stained and sticky and nasty. I was also seating in one of the last rows and one crew member and people going to the bathroom kept hitting my elbow resting on the armrest.

Flight was delayed for 2h. Announcements were poor and I was given 1 biscuit and a bottle of water as consolation. Not happy.

There were no gluten-free vegan options available, so food was very limited on this flight, and some of the crew weren’t especially helpful about it. To make matters worse, a passenger was sick on board, and although the area was cleaned, the smell lingered for the rest of the journey. On top of that, we ended up circling for an extra hour, which only made the unpleasant situation drag on even longer.

The crew’s professionalism was top notch and the food and drinks available were excellent. I only ask that we get the refurbished 777’s on the London to Bermuda route that I had for the London to Singapore leg. The updated infotainment system is much better than the older version

Checking in prior on line and wait time at Gatwick was terrible. I would rate a big fat ZERO.

I checked in to bags, one arrived one was delayed. I did not receive the bag for 4 days - arrived on Tuesday, received bag on Saturday!

It was ok. Our flight was delayed 2 hours, and then again on arrival. The explanation given felt feeble.

The booking agent, cheapflightsfares, messed up, and the information for the seats we paid extra for was not sent to American Airlines. We were separated on the return flight and sent to the lowest economy section. The flight attendant helped arrange seating at the back of the plane to allow my wife and me to sit together.

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

Information on your arrival and departure airports

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