LHR - SJU

£403 Find Cheap Flights from London Heathrow Airport 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 Heathrow to San Juan departing on 19/5. 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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Everything you should know

Cheapest return fare
£578
Typical prices: £868-£554
JetBlue
Tue 2/6Fri 12/6
LHR - SJU • 1 stop
Cheapest one-way flight
£403
Typical prices: £426-£430
Multiple Airlines
Tue 19/5
LHR - SJU • 2 stops
Top airlines
Cheapest • from £578 (return)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Not available
There are currently no direct flights between Heathrow and San Juan. You’ll need at least 1 connection.
Insights
Insights
Insights
Insights
Top stopover airports
Cheapest • Avg £652 (return)
Shortest trip • 12h 58m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 18% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 16% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to San Juan!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Heathrow to San Juan (LHR-SJU)

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

Tue, 2 Jun - Fri, 12 Jun
JetBlue Logo
11:55 - 22:53
LHR
-
SJU
15h 58m
1 stop
JetBlue Logo
13:12 - 09:30
SJU
-
LHR
15h 18m
1 stop
£578JetBlue
Wed, 3 Jun - Sun, 14 Jun
JetBlue Logo
11:55 - 22:53
LHR
-
SJU
15h 58m
1 stop
JetBlue Logo
13:12 - 09:30
SJU
-
LHR
15h 18m
1 stop
£583JetBlue
Thu, 4 Jun - Wed, 10 Jun
JetBlue Logo
08:15 - 17:30
LHR
-
SJU
14h 15m
1 stop
JetBlue Logo
14:11 - 09:30
SJU
-
LHR
14h 19m
1 stop
£584JetBlue
Wed, 3 Jun - Mon, 15 Jun
JetBlue Logo
11:55 - 22:53
LHR
-
SJU
15h 58m
1 stop
JetBlue Logo
11:50 - 09:30
SJU
-
LHR
16h 40m
1 stop
£587JetBlue
Sun, 6 Sep - Sat, 12 Sep
JetBlue Logo
08:15 - 19:50
LHR
-
SJU
16h 35m
1 stop
JetBlue Logo
13:00 - 09:30
SJU
-
LHR
15h 30m
1 stop
£593JetBlue
Fri, 5 Jun - Wed, 10 Jun
JetBlue Logo
08:15 - 17:46
LHR
-
SJU
14h 31m
1 stop
JetBlue Logo
14:11 - 09:30
SJU
-
LHR
14h 19m
1 stop
£599JetBlue
Thu, 3 Sep - Sat, 12 Sep
JetBlue Logo
11:55 - 00:10
LHR
-
SJU
17h 15m
1 stop
JetBlue Logo
13:00 - 09:30
SJU
-
LHR
15h 30m
1 stop
£605JetBlue
Tue, 2 Jun - Sun, 14 Jun
JetBlue Logo
11:55 - 22:53
LHR
-
SJU
15h 58m
1 stop
JetBlue Logo
15:24 - 09:30
SJU
-
LHR
13h 06m
1 stop
£609JetBlue
Tue, 2 Jun - Mon, 15 Jun
JetBlue Logo
11:55 - 22:53
LHR
-
SJU
15h 58m
1 stop
JetBlue Logo
11:50 - 09:30
SJU
-
LHR
16h 40m
1 stop
£613JetBlue
Wed, 3 Jun - Wed, 10 Jun
JetBlue Logo
11:55 - 22:53
LHR
-
SJU
15h 58m
1 stop
JetBlue Logo
14:11 - 09:30
SJU
-
LHR
14h 19m
1 stop
£616JetBlue
Booking Insights

KAYAK’s insights & trends for Heathrow to San Juan flights

Get data-powered insights and trends into flights from Heathrow 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 Heathrow Airport 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 Heathrow Airport to San Juan Luis Munoz Marin Intl Airport departing in June.

What is the cheapest month to fly from London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport to San Juan Luis Munoz Marin Intl Airport is September, where tickets cost £554 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is £957 and £703 respectively.

How far in advance should I book a flight from London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport to San Juan Luis Munoz Marin Intl Airport, you should book around 4 weeks before departure, which saves you about 18% 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 Heathrow Airport to San Juan

Low seasonSeptember
Cheapest flight£403
Best time to beat the crowds (16% less expensive on average)
Most popular time to fly (45% more expensive on average)
Flight from London Heathrow Airport to San Juan

When to book flights from Heathrow to San Juan

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

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

    In the last 3 days, the lowest price for a flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport was £403 for a one-way ticket and £578 for a return.

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

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

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

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between London Heathrow Airport and San Juan, with Star Alliance 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 £795 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 £1,025 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from London Heathrow Airport 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 Heathrow Airport to San Juan.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Heathrow Airport 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 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 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 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 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 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 5 airlines flying from Heathrow 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 Heathrow 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.
7.4
Virgin AtlanticOverall score based on 688 reviews
8.1Crew
7.5Entertainment
7.7Boarding
7.3Comfort
6.9Food
Airline reviews

Seating and zone. The minor I went with didn’t even seat close to me

4.0 OkayAnonymous, Mar 2026
BOS - LIS
Read more Virgin Atlantic reviews

Seating and zone. The minor I went with didn’t even seat close to me

My seat 3G did not go down fully and the buttons were not working properly

Food has been disappointing in both legs of flight to india

Great staff great experience, made a 2 hour delay very bearable

Great staff, great experience, made a 2 hour delay very bearable

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

I was my pleasure to fly virgin on my birthday for my first solo trip ever 🫶🏼

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

Overall, flight was excellent but check in was very slow for Premium Economy. Economy queue was shorter but we weren't allowed to use it.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

Purchased through 3rd party vendor which made everything difficult. Unable to check in online. Unable to get flight updates easily, tsa precheck information didn’t carry through, longer time to check in in person. Entertainment looked good but had to purchase conventional headphones to view.

I specifically choose not to check bags to ensure I can proceed directly to ground transportation upon arrival. However, due to a recurring lack of cabin space, I was again forced to gate-check my rolling luggage after going through my luggage to take out electronics and batteries. This practice unilaterally changes the service agreement made at the time of purchase. JetBlue needs to find a better way to manage overhead space that honors the carry-on baggage allowance.

Flight cancelled 2 hours prior to boarding. No explanation. No refunds.

Well, its a hit or miss when boarding most of the time your employees just let everyone enter immediately In one bum rush. Then out of know where tell the passengers only let A can enter then b then c etc. So make a decision and stick to it. Do it by alphabet and have famn strick compliance. Let the public know. That makes easier on passengers.

Arrived as recommended at 8:15 a.m. for an 1115 flight, that kept getting delayed delayed and delayed and then finally canceled. Instructed for the split flight to go to Fort Lauderdale, and then find our way from there back to New York. I don't think I will ever trust flying with JetBlue again. This was my second horrific experience and I am really angry.

Flights with JetBlue from San Diego to Boston are a miserable experience. The flight was delayed about 1.5 hours due to “weather” supposedly but the flights for other airlines left on time so it just have been some kind of weather that only affects JetBlue. I had a small carry on - purse. The crew stored it in a bin 2 rows down from me because they were using the bin next to my seat for other people’s stuff. The TV screen in the emergency row seats does not work. It just was awful from start to finish. When we landed, we had to sit inside the plane for a very long time because the plane had to be moved to a different gate.

Rude crew member. She seemed annoyed at me without me saying a single word. Also loudly admonished me for having my bag next to my seat instead of tucked away before landing. Just telling me to put it away and guiding me without giving me a lecture would have been enough.

Because of weather and mechanical issues our flight was 4 hours late. The only compensation offered to us was a meal voucher to be used only at Boston Airport and only on the day issued. But by the time it was offered to us all the restaurants were closed, so there was no way to use that offer.

Qatar Airways only had spicy meals on the menu in economy class. You might want to get food in the airport before boarding.

Friendly crew. Poor food service maybe due to full flight. All in all, you get what you pay for.

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

When you consider the price I ended up paying for everything. This was not a good deal! I had no idea that this airline had changed to a bargain basement no frills airline. So, it was disappointing to have to pay for every little thing. The only thing included was water and coffee. You have to pay for everything else! So I just felt nickel and dime.

The Icelandair crew was so kind!!! Thank you for making my first trip to Paris a great one!

The movie choices were poor. The worst problem is the treatment of passengers durinng pre-boarding. In one case the primes were checked in and sent down the boarding tunnek only to stand waiting there while the plane is cleaned. In the second case the bus was loaded, the doors closed and just stood there unmoving like sardeines in a tin for over TEN minutes. In both cases it was rough on us old guys who find standing for long periods trying.. In other words, Donnt just stack us up and forget us.

I had no idea that my ticket only paid for my right to get on the plane. They charged me $130 for my carry-on bag because it was 1 inch too big she claimed but it wasn’t! Then they wanted another fee for everything. I had no idea that Icelandair had changed to such a bargain basement airline. I was very disappointed.

Screen didn't work, and neither did the button to tilt the seat even though the seat was comfortable

Second time with Saga Premium, everything was fab, but the entertainment centre on both my flights didn't work, plus the seat on the NY to Rek flight (Airbus) was so solid and so uncomfortable. The 737Max flight's seat was much, much better.

The most uncomfortable seat i’ve ever had on a flight

Iceland Air severely damaged a checked bag. Additionally, the gate agent caused issues for many passengers who had standard-sized onboard bags that would have passed inspection by any other airline.

The staff was kind and helpful. There was no food, and you needed to bring your own earphones to use the entertainment, which I didn’t know.

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

Really like the idea experience on this airline I will use again

It was fine, older plane with limited entertainment, otherwise fine.

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.

Flight was OK. Waiting for luggage in Madrid for 55 minutes, unacceptable

This was a short flight. We sat in business class so we we were served a warm meal, which was nice. The flight attendants were very attentive, professional, and kind.

The plane needs upgrading, the seats are uncomfortable, we are a family of three and they split us and did nothing to group us together, and the food is horrible compared to other airlines bu

Horrible experience airline crew was unprofessional. Flight was delayed. Suit cases did not arrive. Never flying iberia again

Boarding was odd. Gates switched and had to take a bus to the plane. Luggage got lost. Still waiting on one bag. Flight itself was very nice!

The map feature on the display at the seat had challenges. The biggest issue was the flight had no WIFI. Most of the smaller planes now have free WIFI. American Airlines on the flight over had WIFI you could purchase. With 8-10 hours on a single flight, the ability to do work via WIFI is essential!!

A shout-out to the flight attendent, Lauren, who was the main person assisting me. She was amazing - perfect balance of bright, cheerful, engaging, yet formal

Cramped seating but standard in all smaller aircrafts today no matter what airlines. Crew very helpful, friendly & attentive so makes up for that.

Wonderful business class flight in a lovely new plane with an excellent crew

OK, except for a cabin attendant's lack of attention.

efficient. on time. cabin crew were very professional and very nice to deal with. would definately fly BA again.

It was great overall. A few slight improvements could be made on the onboarding process at the Gates with announcements and clarity of communications (both at the gate and in flight). The movies in the entertainment options could be improved for bollywood, hollywood.

I alrady responded to this request, and expllaned at length that this was the worst flying experience in my 77 years. I will NEVER fly BA again.

Airbus A350 is poorly designed for wheelchair users and reduced mobility passengers. The angle of the pods makes it awkward to transfer. I was able to but I have ab stability. It could be a real challenge for people with more severe mobility impairments. You'd think Airbus would have come up with a solution for this or thought more about us disabled folks more when designing this aircraft.

The crew has always been great on BA. They are very friendly and accommodating. I like that they have vegetarian options already in the menu. And the free wine is a nice perk.) I noticed (both directions of my trip) minor upgrades/ replacements needed on the plane itself (touch screen didn't work with touch; bathroom light didn't go on). However, this is one of my favorite airlines.

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

Information on your arrival and departure airports