LON - SJU

£281 Find Cheap Flights from London to San Juan

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 San Juan departing on 24/11. 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 San Juan Luis Munoz Marin Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to San Juan.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to San Juan.
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Flight Deals

Cheap Flights from London to San Juan (LON-SJU)

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

Sun, 11 Jan - Sat, 17 Jan
Multiple Airlines Logo
14:10 - 16:23LGW-SJU
30h 13m2 stops
Multiple Airlines Logo
19:52 - 06:00SJU-LGW
30h 08m2 stops
£521Multiple Airlines
Find Deal
Sun, 11 Jan - Sat, 17 Jan
Multiple Airlines Logo
14:10 - 09:52LGW-SJU
23h 42m1 stop
Multiple Airlines Logo
19:52 - 06:00SJU-LGW
30h 08m2 stops
£521Multiple Airlines
Find Deal
Tue, 6 Jan - Tue, 13 Jan
Icelandair Logo
07:25 - 10:32LHR-SJU
31h 07m2 stops
Icelandair Logo
08:15 - 09:30SJU-LHR
21h 15m1 stop
£524Icelandair
Find Deal
Tue, 25 Nov - Mon, 8 Dec
JetBlue Logo
12:20 - 03:48LHR-SJU
19h 28m1 stop
JetBlue Logo
10:00 - 09:30SJU-LHR
19h 30m1 stop
£527JetBlue
Find Deal
Wed, 12 Nov - Tue, 18 Nov
JetBlue Logo
07:25 - 21:54LHR-SJU
18h 29m1 stop
JetBlue Logo
14:33 - 06:55SJU-LHR
12h 22m1 stop
£530JetBlue
Find Deal
Wed, 26 Nov - Sat, 6 Dec
Icelandair Logo
12:20 - 03:48LHR-SJU
19h 28m1 stop
Icelandair Logo
10:00 - 06:55SJU-LHR
16h 55m2 stops
£538Icelandair
Find Deal
Tue, 25 Nov - Mon, 8 Dec
British Airways Logo
06:50 - 23:52LCY-SJU
21h 02m2 stops
British Airways Logo
16:50 - 18:35SJU-LCY
21h 45m2 stops
£918British Airways
Find Deal
Mon, 19 Jan - Sun, 25 Jan
Iberia Logo
09:10 - 19:55LCY-SJU
14h 45m1 stop
Iberia Logo
21:25 - 14:35SJU-LCY
13h 10m1 stop
£932Iberia
Find Deal
Mon, 26 Jan - Thu, 5 Feb
British Airways Logo
09:10 - 19:55LCY-SJU
14h 45m1 stop
British Airways Logo
21:25 - 14:05SJU-LCY
12h 40m1 stop
£940British Airways
Find Deal
Thu, 22 Jan - Mon, 2 Feb
Iberia Logo
07:50 - 19:55LCY-SJU
16h 05m1 stop
Iberia Logo
18:10 - 14:35SJU-LCY
16h 25m1 stop
£943Iberia
Find Deal

Everything you should know

Top airlines
Icelandair
Cheapest • from £524 (return)
Finnair
Best reviews • 7.6 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 19% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 20% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest return fare
£521
Multiple Airlines
Sun 11/1Sat 17/1
LGW - SJU • 2 stops
Cheapest one-way flight
£281
Multiple Airlines
Mon 24/11
LGW - SJU • 1 stop
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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 San Juan!
Booking Insights

KAYAK's insights & trends for London to San Juan flights

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

How much is a return flight from London to San Juan Luis Munoz Marin Intl Airport?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from London to San Juan Luis Munoz Marin Intl Airport departing in January.

What’s the cheapest day of the week to fly from London to San Juan?

The average price of all round-trip flights from London to San Juan Luis Munoz Marin Intl Airport clicked on KAYAK for each day over the last 12 months.

For London to San Juan, Monday is the cheapest day to fly on average and Friday is the most expensive. Flying from San Juan back to London, the best deals are generally found on Tuesday, with Saturday being the most expensive.

What is the cheapest month to fly from London to San Juan Luis Munoz Marin Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London to San Juan Luis Munoz Marin Intl Airport, 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 San Juan Luis Munoz Marin Intl Airport is September, where tickets cost £541 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is £948 and £933 respectively.

How far in advance should I book a flight from London to San Juan Luis Munoz Marin Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London to San Juan Luis Munoz Marin Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from London to San Juan Luis Munoz Marin Intl Airport, you should book around 4 weeks before departure, which saves you about 19% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know - Cheap tickets from London to San Juan

Low seasonJune
Cheapest flight£281
Best time to beat the crowds (9% less expensive on average)
Most popular time to fly (37% more expensive on average)
Flight from London Gatwick Airport to San Juan

When to book flights from London to San Juan

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

  • What is the cheapest flight from London to San Juan Luis Munoz Marin Intl Airport?

    In the last 3 days, the lowest price for a flight from London to San Juan Luis Munoz Marin Intl Airport was £281 for a one-way ticket and £521 for a return.

  • Which airports will I be using when flying from London to San Juan?

    London has 5 major airports: London City, London Gatwick, London Heathrow, London Luton, and London Stansted. San Juan Luis Munoz Marin Intl is the only airport in San Juan. You’ll usually find the cheapest deals if you fly from London Heathrow Airport.

  • Which aircraft models fly most regularly from London to San Juan?

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

  • Which airline alliances offer flights from London to San Juan?

    SkyTeam, and oneworld are the airline alliances operating flights between London and San Juan, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from London to San Juan, Finnair or Virgin Atlantic?

    The two airlines most popular with KAYAK users for flights from London to San Juan are Finnair and Virgin Atlantic. With an average price for the route of £557 and an overall rating of 7.6, Finnair is the most popular choice. Virgin Atlantic is also a great choice for the route, with an average price of £941 and an overall rating of 7.5.

  • How does KAYAK find such low prices on flights from London to San Juan?

    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 San Juan.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Juan from London 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 to San Juan?

    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 San Juan 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 San Juan?

    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 San Juan 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 5 airlines flying from London to San Juan

 
See real verified KAYAK customer reviews for airlines flying from London to San Juan. 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 San Juan? 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.
7.6
FinnairOverall score based on 1333 reviews
7.4Comfort
6.9Entertainment
6.7Food
7.6Boarding
8.1Crew
Airline reviews

All reviews good because...flight from BWI to London ,economy seats was miserable. I usually book 1,step up from economy but this would have added 1500 bucks 1 way. Bit the bullet and upgraded for retun flight, otherwise all ratings would have been rock bottom.

8.0 ExcellentDavid, Oct 2025LHR - BWI
Read more Finnair reviews

All reviews good because...flight from BWI to London ,economy seats was miserable. I usually book 1,step up from economy but this would have added 1500 bucks 1 way. Bit the bullet and upgraded for retun flight, otherwise all ratings would have been rock bottom.

Great. It was awesome to have boarding from the front and back of the plane as it made the process go very quickly

It was okay. The airplane was a little smaller than a flight from Thailand to Helsinki.

Wish that everyone would board the back of the plane first. Also let kids on first. The gate wasn’t open at arrival and we waited 45 minutes to takeoff. They made up for time in the air.

This was an absolutely exceptional flight. The flight attendants were extremely attentive and very friendly. They seemed to go out of their way to make us comfortable and to make sure that we had everything we needed., We were in business and were very happy with the size and the details for our pods. We would definitely recommend Finnair and will definitely be flying with them again.

We had an excellent trip with Finnair. This was our first time and we’re very pleased. The only issue was with the boarding - it was a little bit confusing and needs a little bit of streamlining.

Crew very lovely. Arrived an hour late due to bad weather. We were given new tickets to an other flight but it could have been organised better, so we did not have to run through the whole airport to.

Flight delayed over an hour. They said they would hold our connection but then did not.

Major problems checking in at Alaska counter. They could not find our booking code because it came from Finnair.

Do not use KAYAK or Finair for future travel. Unless you purchase the tickets directly from the airline, you were going to have a difficult time checking in. Kayak canceled my flights twice and ended up causing great difficulty in me getting back from Europe because they double sold my tickets between American Airlines and Finair. The event caused significant delays and led to me having to rebook my flights.

WiFi was not eorkig (again) And the plane was from 1990 with the screens which were.not touch and most didn’t even work and if lucky could tune in tv

I paid extra for a seat closer to the front. The TV didn’t work at all for the entire flight. Would have been nice to know before I purchased an “upgraded “ seat

JetBlue is always consistent and great, the food is limited in selection, but at least you can grab as much as you want on snacks and drinks at the Blue Locker.

Too many long delays with JetBlue. Worst major airline that serves JFK but unfortunately I keep going back because of the prices.

To not have food or proper snacks on a 5 hour flight was the worst.

I especially liked the lead crew officer. His boarding and safety announcements were made with a bit of novelty and humor. The flight also left the gate 10 minutes early and we landed about 20 minutes early… It was a delightful flight…

flight was delayed for hours with no explanation. The plane was a very old aircraft.

The check in and boarding process was a bit of a cluster. Two people at the counter to check in, three random lines that nobody knew which was for what, and people kept getting shuffled from one line to another for no apparent reason because then they’d get shuffled back and end up getting out further back in the line than they were originally. I only had to hand my already checked bag over and it took 45 minutes. I was never assigned a seat so when I tried to board I was pulled out of line again while someone had to try to manually assign me a seat. During the flight I got up to go to the bathroom, and there was an attendant in the aisle offering pillows etc and it was a 30 min wait unbuckled standing by the bathrooms because she said I couldn’t go past her. First and last time flying jet blue to be honest.

Great flight. Departed early, arrived early. However they were out of meals for sale. Also, we arrived early and the gate was not available so we sat on the taxiway for quite a while (not JetBlue’s fault).

The regular feedback of any changes to our flights. The Jetblue staff were very helpful. Our flights were great. Lots of leg room!

It was too cold in the plane my feet froze

Service was excellent. Food and drinks were very good except for a greasy lump of a donut at the end of the flight that left us both feeling internally disgusted.

Handling our luggage was the biggest issue - they lost it and we got it almost 3 days later. Really threw off the beginning of our trip and we really had to change our itinerary accordingly.

Seat was hard and uncomfortable and the temperature too warm and uncomfortable.

I flew Icelandair with my partner from Prague to the US. Overall flight time was around 12 hours, with a connecting flight in Iceland. I have flown internationally for years and with multiple airlines. Every airline serves you a meal when traveling internationally. Icelandair not only did not offer an inclusive meal, but they did not even offer a snack. The only things they served over our long flight was water and coffee. Ridiculous! Never again will I fly with Icelandair.

Worst airline I’ve ever flown. Delayed 5.5 hrs, missed connecting flight, and missed an entire day of vacation. Zero customer service

Everything sucked. No food, one small glass of water, a tiny coffee, 5.5 hour delay with no customer service. Would never recommend flying them.

There was no lounge at Boston for us to use. Typically flying first class overseas comes with lounge privileges. The seats did not recline even a little. My headset only worked on one side. I felt like I was flying on Ryan Air, not Icelandic Air.

Great experience on Icelandair flight from Newark to Amsterdam by way of Reykjavík. Courteous and professional staff. Food was solid. Service - outstanding. Cabin was a little warm.

The plane was very small and the aisle was so narrow that every time someone walked by they rubbed against me, so it was very uncomfortable.

We were delayed 2 hours because the crew was late. They need better planning by the crew, we had to sit in uncomfortable seats waiting for them.

Difficulty to check in online, but well handled at the airport. Flight delay was unfortunate. Crew was adequate but not what we have usually experienced from BA. Seat was not comfortable.

Easy and organized getting in and out of the flight

Moved the flight an hour later, were not reliable about confirmation, website didn't work, no gate information, boarding was a mad house. Flight itself was fine and short. Organization needs work.

Charging $300 to be able to pick a seat next to your wife was nothing less than extortion.

Flight boarded three hours late for no reason other than someone made a huge error in crew scheduling. We missed our connecting flight in Madrid and got zero help from American or Iberian airlines on rebooking. We had to pay for a car to take us to the Madrid train station and pay for train tickets to Santiago. We never used our booked flight to Santiago. American claims I can submit the expenses but they are not obligated to cover them. Very frustrating.

I’m very mad because I paid an extra $105 to change seats to an exit row with more leg room. The app clearly showed a gap in between the seats in the row I changed my seat to and I paid for it. When I boarded the plane, it wasn’t an exit row seat and no more room than my original seat. I feel like I was ripped off $105.

They cancelled the flight)(they said bad weather but many other flights took off) and made us wait 5 hours in line to figure out what to do. We ended up making a new flight the next day on another airlines...I hope they honor giving us our money back

I had a great experience , crew was great and enjoyed the entertainment options I will be booking my next International trip with them .

Front desk was closed at 6 pm, I was unable to get my boarding pass and as such missed my connecting flight home.

We always use BA due to the direct flight options, we have always had a pleasant flight with BA.

There might be more food options for people who can't eat so much starch/sugar/bread/rice. Meat, cheese, walnuts/pecans for snack, maybe jerky or other kinds of meat-based snacks would be better than bread and rice and sweets. I had an extra chardonnay, which was fine. The entertainment was great.

Unfortunately, my flight was cancelled because of some sort of emergency over the Atlantic and had to return to London. While I think British Airways made every effort to mitigate the situation, I must say it was still pretty unpleasant. I do appreciate the fact, however, that British Airways put my safety first…and I think the effort to correct a bad situation was very sincere. But I think the process might be handled better in future.

Horrible leg room - coach seating with empty seat in middle on a 3 across seating. You buy business class for comfort which includes leg room. Absolutely no entertainment options either. Awful experience

Flight was 3h50 and was only provided with a packet of oat cookies and offered a cold drink. Thankfully i'd had breakfast but for a morning flight of that length some sort of breakfast should be included. There were 2 toilets for economy but due to turbulence we couldn't use them until the last 1hr which meant the queue was then huge. Would've been nice to open up the business one for those closest to the front to use.

Crew service was poor and very little difference between premium economy and economy. Disappointed.

My bags never made it on the flight and I now have to wait for them to arrive hopefully tomorrow. You can’t even track your bags in the app to see where they are since they didn’t arrive. You have to file a claim and then wait for them to inform you when you will receive your bag. We were already delayed for an hour due to baggage so I don’t understand how my bag didn’t make the flight.

One of the worst experience given the middle seat even asked for the change no one honored,boarded at the end and overall one of the worst experience

No WiFi in either flight. No leg room, the seat in front of me left dents on my knees and the tray was so low my knees propped it up if I tried to use it.

It was good although our flight to the UK was cancelled and rescheduled for two days later. This was after we were already seated on the plane. We missed the first leg of our trip. BA did put us up at a hotel and paid for our meals but we lost our hotel costs in Glasgow.

Everything you need to know for your flight from London to San Juan

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