LON - SJU

£293 Find Cheap Flights from London to San Juan – Compare and Save

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 4/9. 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, 0 bags

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Everything you should know

Cheapest return fare
£482
Multiple Airlines
Sun 27/9Fri 23/10
LGW - SJU • 1 stop
Cheapest one-way flight
£293
Multiple Airlines
Fri 4/9
LGW - SJU • 1 stop
Top airlines
Cheapest • from £590 (return)
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Not available
There are currently no direct flights between London and San Juan. You’ll need at least 1 connection.
Insights
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Top stopover airports
Cheapest • Avg £651 (return)
Shortest trip • 12h 18m (one-way)
Insights
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When to book
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 13% compared to booking last minute.
Insights
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Insights
When to travel
Cheapest • 24% price drop
Most popular
Good to know
Good to know
+1
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Good to know
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We hope you love your trip to San Juan!
Flight Deals
Booking Insights
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, 27 Sep - Fri, 23 Oct
Multiple Airlines Logo
14:00 - 09:35LGW  London Gatwick-SJU San Juan Luis Munoz Marin Intl
24h 35m1 stop Orlando
Multiple Airlines Logo
02:58 - 10:00SJU  San Juan Luis Munoz Marin Intl-LGW London Gatwick
26h 02m1 stop Orlando
£482Multiple Airlines
Wed, 30 Sep - Fri, 23 Oct
Multiple Airlines Logo
14:00 - 09:35LGW  London Gatwick-SJU San Juan Luis Munoz Marin Intl
24h 35m1 stop Orlando
Multiple Airlines Logo
02:58 - 10:00SJU  San Juan Luis Munoz Marin Intl-LGW London Gatwick
26h 02m1 stop Orlando
£493Multiple Airlines
Fri, 30 Oct - Sat, 7 Nov
JetBlue Logo
12:20 - 11:23LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
27h 03m1 stop New York John F Kennedy Intl
JetBlue Logo
07:00 - 06:55SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
19h 55m1 stop Boston Logan Intl
£590JetBlue
Mon, 2 Nov - Mon, 16 Nov
JetBlue Logo
12:20 - 16:51LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
32h 31m1 stop New York John F Kennedy Intl
JetBlue Logo
16:00 - 20:45SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
24h 45m1 stop New York John F Kennedy Intl
£590JetBlue
Tue, 1 Sep - Wed, 9 Sep
Icelandair Logo
13:05 - 10:00LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
25h 55m2 stops Reykjavik Keflavik Intl Boston Logan Intl
Icelandair Logo
10:30 - 20:20SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
28h 50m2 stops New York John F Kennedy Intl Reykjavik Keflavik Intl
£744Icelandair
Tue, 29 Sep - Wed, 28 Oct
Icelandair Logo
13:05 - 13:39LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
29h 34m2 stops Reykjavik Keflavik Intl New York John F Kennedy Intl
Icelandair Logo
10:45 - 10:50SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
20h 05m2 stops New York John F Kennedy Intl Reykjavik Keflavik Intl
£768Icelandair
Wed, 18 Nov - Mon, 30 Nov
British Airways Logo
07:50 - 16:40LCY  London City-SJU San Juan Luis Munoz Marin Intl
12h 50m1 stop Madrid Barajas
British Airways Logo
10:32 - 08:50SJU  San Juan Luis Munoz Marin Intl-LCY London City
18h 18m2 stops Miami Madrid Barajas
£925British Airways
Wed, 18 Nov - Mon, 30 Nov
British Airways Logo
07:50 - 16:40LCY  London City-SJU San Juan Luis Munoz Marin Intl
12h 50m1 stop Madrid Barajas
British Airways Logo
21:35 - 14:15SJU  San Juan Luis Munoz Marin Intl-LCY London City
12h 40m1 stop Madrid Barajas
£925British Airways
Fri, 18 Dec - Wed, 6 Jan
Iberia Logo
12:10 - 10:51LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
26h 41m1 stop Miami
Iberia Logo
18:10 - 14:55SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
16h 45m1 stop Madrid Barajas
£1,209Iberia
Sat, 19 Dec - Sun, 27 Dec
Iberia Logo
12:10 - 10:51LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
26h 41m1 stop Miami
Iberia Logo
05:24 - 12:05SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
26h 41m1 stop Miami
£1,288Iberia
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 September.

Flight prices are below average for this route right now.

Flights to San Juan Luis Munoz Marin Intl Airport from London usually cost between £707 and £882 in September.
The lowest price found in the past 5 days was £524 on Multiple Airlines (21 Sept–28 Sept).

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 February, where tickets cost £531 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is £942 and £890 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 13% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Good to know - Cheap tickets from London to San Juan

Low season

September

Cheapest flight

£293
Best time to beat the crowds (11% less expensive on average)
Most popular time to fly (33% 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 5 days, the lowest price for a flight from London to San Juan Luis Munoz Marin Intl Airport was £293 for a one-way ticket and £524 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, Virgin Atlantic or United Airlines?

    The two airlines most popular with KAYAK users for flights from London to San Juan are Virgin Atlantic and United Airlines. With an average price for the route of £1,040 and an overall rating of 7.5, Virgin Atlantic is the most popular choice. United Airlines is also a great choice for the route, with an average price of £1,276 and an overall rating of 7.4.

  • 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.
7.1
JetBlueOverall score based on 3031 reviews
7.2Entertainment
6.6Food
7.9Crew
7.3Boarding
7.5Comfort
Airline reviews

Flight was delayed many times. The crew was friendly but you eleven had to buy headphones to access the movies in the plane. $8 is not a lot for one person but it is when you travel with all your family.

2.0 MediocreAnonymous, Jun 2026
Read more JetBlue reviews

Flight was delayed many times. The crew was friendly but you eleven had to buy headphones to access the movies in the plane. $8 is not a lot for one person but it is when you travel with all your family.

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.

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

Very well organized both boarding and deplaning. Very satisfied with the service I received.

at the time for boarding the lady just call Group A and no other goups and everybody from A to F go inside without the right turn,and when we get in theres no more spsce for carry on , the ones that get in at not correct group from the back occupy our space !!!!! a mess !!!!

The boarding and flight were ok, but there were several painful issues. The flight was 3:20 in the air and almost four hours door to door, but they only had snack packs on the plane. They really need to have food on longer flights or make it clear to everyone that they won’t have food. They also advertise free WiFi, but it did not work for 90% of this flight. Again, almost four hours door to door. If I had known I was flying spirit for JetBlue prices then I would have planned differently.

We liked the flight, but not in JFK, not in Gatwick it is no lounge and this was surprising and disappointing. I think by now it is understandable that COVID will not go away and why it should not be business lounge?

I think the food / snack service was very poor. tehy could have done better. Evrything else was great

No wifi, not even while close to the continental US or Puerto Rico, no entertainment whatsoever (TVs not working). Totally disappointing.

Wifi screens were great. Both flights were delayed, spending all day flying home and then getting home at 3am ruins the next day also.

There was confusion over the electric wheelchair. Though it was categorized and double checked at checking the gate seemed confused by the chair.

Boarding was a mad rush as people still had issues with boarding passes and groups 3- 7 were asked to board when travelers were still stuck behind the document check. Food was one of the worst I’ve ever had in an Economy flight. The crew was very friendly though

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.

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

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.

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.

Overall a great. However, the seating is way too narrow, for guys with any shoulder width. Luckily the crew moved the guy next to me, or it would have been miserable.

okay, will recommend from PR to Madrid, faster turn around

Let's just say I won't do it again.

1. No food on a 8 hr flight is a travesty! The fare was not that low. 2. The entertainment was pretty bad and you had to buy headphones!!! 3. Only 2 toilets for the whole Economy section!!

Was a bit surprised that Icelandair flies a domestically configured 757s on long-haul flights to Iceland (no lie-flat seats in business class).

If there was a disclaimer regarding food service or lack thereof, l missed it. If l had known l would have prepared better. Same with transferring at Reykjavik. No information about disembarking via stairs into rain, slush and puddles deep enough to swallow a foot. After being treated to haute cuisine restaurants and warm inviting environment during the flight, the airport is, let’s be kind, disappointing. Plane was comfortable, Airbus, staff were welcoming enough. I would likely try the route again. Maybe have a night and day in Iceland. Maybe not.

Iceland air transfer was bad. They lost my luggage and I just received it 11/1

For an economy lite experience, it's by far the best I've had. New planes, clean, great destinations. Very happy to have discovered Iceland Air.

Smooth efficient airline. Think they should have their own bag drop as the queue took 30mins to bmscan and drop

Well! They got me as far as Iceland, let me wait around at the airport since my next flight had either left or canceled, finally gave me my luggage, and sent me to wait quite some time with seven other people for a ride to a hotel. At the hotel we got a chef's salad, a nice room for the night which unfortunately had feather pillows and duvet (allergies), a really great and spectacular buffet for breakfast (small but stunning), taxis back to the airport for the 9:30 Delta flight back to Minneapolis. The Delta flight has free food and liquor included which Icelandair does not. All in all, it falls far short of my worst ever United flight to SGN. Icelandair did change my reservation after my roommate tested positive for COVID and we canceled our plans to travel around Iceland, but the charges were fairly hefty. I had trouble contact Kayak's agents to discuss changing my reservations and finally contacted Icelandair who changed them. (I used their contact form and put in several requests for call backs.) Of course, they called just after I made the change with Icelandair.

did internet check in but still had to get checked in at the counter and this was not the first time. Bummer!

Paying $75 for my bag is disgusting. Got off ground late so I missed my connections. Kept us waiting for passengers in the cold. Will not use them again.

My first check in at my origin checked my visa for my international flight but it needed to be checked again. While this is understandable, I had to wait in line for 2 hours to get this second check. More agents are needed to process travel issues in Heathrow. There were times during the 2 hour wait that there was only one person servicing the long line (I don't know where the others went). There were many agents milling about but not working the desk so it seemed as if there were plenty of people at work that day. I attempted to use the automated kiosk but because I had a new visa (not one in my passport). Again, most of this was understandable travel delays but the queue processing time was just horrible.

Online check-in not available from Istanbul to Las Vegas. The check-in process at the airport was extremely and inefficient period. Took us over an hour to check in. Besides that, everything else about British Airways was good

My screen didn't work for the first 9.5 hours of the flight. The crew could not resolve. I don't watch much media so I had been really excited to relax and watch a BBC special but couldn't. Then I tried to use the online streaming on my devices - that never worked but I do have about 7 charges on my credit card that I now have to dispute with BA. Pretty annoying. Also, they ran out of meals and they served meals that had a serve by date of 1/26. But the staff were all very friendly and helpful when they could help.

Very bad check in service. They hardly spoke of any English - at least in a way to communicate. Downgraded from Business due to seat malfunction. Could not even allocate a seat in economy with an empty seat next to me. So called manager at check in was a total waste of time

My flight from Zurich to London was delayed 2hours and 45minutes. It was awful.

Not enough food for a 4 hour trip…Lack of entertainment and with no WIfi accessibility I didn’t figure it out how to access free WiFi

Not good because in this cancelled and then rebooked flight BA put me and my husband in both middle seats when we were originally seated together in original flight and i was in aisle. I hate sitting in the middle. BA food needs to be better. It was just ok. Thanks though to screw and everyone one for safe flight

Crew members were thorough in checking seatbelts and whatnot which makes me feel cared for because passenger safety is a main concern.

I was sent an email that said my card payment was not verified. When I spoke to an agent , he said my card was not verified and the flight I thought I had to booked was no longer available so I booked another flight on another airline(United). Later I got flight updates , etc., concerning my supposed first flight. So if I was charged for this flight on British Airways/American airlines, I need a refund.

The crew made it a great flight. They were friendly and attentive. They made me want to fly British Airways again.

Even though I we were flying Business, my wife was in a wheelchair and the lady in the counter told the airport employee that he had to make the line (this was a first for us). There was only snacks and a heavier option to sell. The staff in the plane was great.

The employees at the gate were not communicating, they preferred to give the upgrade to pilots and not to the elite passengers Every flight I more disappointing, clients shooed be priority instead of other employees even if they are pilots, there was plenty room for pilots in economy

Here we have another airline flying to Guatemala but doesn't have a plus or a less, just in the middle. Why? Well, first we don't have even free water Movie selection is poor Seats don't recline in some places Food selection is carb based Forgot to mention, customer service on the web is the worst. Good things; Very reliable on schedule Kind crew

I handed in my suitcase in perfect condition at SAL Airport. And in MIA Airport I received it with one corner broken and the wheels bent.

Worst airline , charge for everything even for water, seat space is very bad

Our flight from BOS - BOG was delayed 10 hours because they were waiting for a Flight attendant to fly from Miami. They lied and said they would give us food and hotel. That was a straight Lie! It never came! We were in the airport for 13 hours with Two babies. We were on the plane 7 more Hours. When we asked to get diapers from our checked luggage, Jorge in Boston told my wife she should have planned better. Meanwhile, the 10 Avianca Employees Sat there and did nothing for 13 hours. Yes, we planned for 10 hours with the wait and the flight, not 20 hours JORGE! If this was an American company we would have got a refund! But they are not up to American standards. The kicker is they apparently needed the 3rd stewardess to serve the food. Guess what? It was 4AM when they tried to serve the FOOD! Everybody was asleep by then! Ridiculous! Never Again!

Avianca flights to Galapagos and back and well organized and on time.

Flight attendants to show up on time, offer drinks and food.

Avianca is the worst most uncomfortable airline I've ever been in, the seats are incredibly small and offer no support, the worst experience I've had traveling ever, do not bother with Avianca

Horrible service. Flight was delayed and the don't even offer eatwr

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

Information on your arrival and departure airports