LHR - SJU

$457 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 11/14. 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 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, 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 San Juan, as well as popular online travel agencies
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Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from London to San Juan

Mon, Feb 2 - Sun, Feb 15
JetBlue Logo
9:20 am - 11:00 pmLHR-SJU
17h 40m1 stop
JetBlue Logo
1:59 am - 8:45 pmSJU-LHR
14h 46m1 stop
$684JetBlue
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Tue, Nov 4 - Tue, Nov 11
JetBlue Logo
12:20 pm - 3:48 amLHR-SJU
19h 28m1 stop
JetBlue Logo
9:30 am - 9:30 amSJU-LHR
20h 00m1 stop
$686JetBlue
Find Deal
Mon, Oct 13 - Thu, Oct 16
Avianca Logo
10:05 pm - 11:55 amLHR-SJU
18h 50m1 stop
Avianca Logo
1:15 pm - 3:35 pmSJU-LHR
21h 20m1 stop
$797Avianca
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Mon, Oct 13 - Thu, Oct 16
Avianca Logo
10:05 pm - 11:55 amLHR-SJU
18h 50m1 stop
Avianca Logo
6:15 pm - 3:35 pmSJU-LHR
16h 20m1 stop
$798Avianca
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Sun, Feb 1 - Sun, Feb 8
TAP AIR PORTUGAL Logo
8:15 am - 3:17 amLHR-SJU
23h 02m2 stops
TAP AIR PORTUGAL Logo
5:15 am - 12:40 pmSJU-LHR
27h 25m2 stops
$806TAP AIR PORTUGAL
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Mon, Feb 2 - Mon, Feb 16
TAP AIR PORTUGAL Logo
1:40 pm - 1:00 pmLHR-SJU
27h 20m2 stops
TAP AIR PORTUGAL Logo
6:15 am - 12:40 pmSJU-LHR
26h 25m2 stops
$814TAP AIR PORTUGAL
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Wed, Oct 15 - Sun, Oct 19
Logo
6:45 pm - 1:43 amLHR-SJU
35h 58m3 stops
Logo
12:06 pm - 5:45 pmSJU-LHR
24h 39m3 stops
$862
Find Deal
Mon, Oct 13 - Wed, Oct 15
Logo
1:45 pm - 2:02 amLHR-SJU
17h 17m2 stops
Logo
4:51 pm - 7:45 pmSJU-LHR
21h 54m1 stop
$945
Find Deal
Mon, Feb 2 - Tue, Feb 10
Icelandair Logo
12:15 pm - 3:17 amLHR-SJU
19h 02m2 stops
Icelandair Logo
6:15 am - 10:50 amSJU-LHR
24h 35m2 stops
$951Icelandair
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Sat, Feb 7 - Thu, Feb 12
Icelandair Logo
8:35 pm - 1:43 amLHR-SJU
33h 08m2 stops
Icelandair Logo
1:15 pm - 10:50 amSJU-LHR
17h 35m2 stops
$953Icelandair
Find Deal
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.

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 Heathrow Airport to San Juan Luis Munoz Marin Intl Airport clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from London to San Juan, look for departures on Wednesdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from San Juan, Wednesday is the cheapest day to fly and Friday is the most expensive.

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 November, where tickets cost $753 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is $1,208 and $1,033 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 2 weeks before departure, which saves you about 29% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

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Good to know

Low seasonJune
Cheapest flight$457
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly and prices are also 14% lower on average.
Flight from London 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 round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 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 $457 for a one-way ticket and $684 for a round-trip.

  • Do I need a passport to fly between London and San Juan?

    Yes

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

    When flying out of London you will be using London Heathrow. You will be landing at San Juan, also known as San Juan Luis Munoz Marin Intl.

  • 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?

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

  • 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 travelers 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 round-trip ticket. You could then fly to San Juan with an airline and back to London with another airline. Booking your flights between London and SJU can sometimes prove cheaper using this method.

  • 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 airline 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.
7.2
JetBlueOverall score based on 2914 reviews
7.3Entertainment
8.0Crew
7.4Boarding
7.6Comfort
6.7Food
Airline reviews

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.

10.0 ExcellentManuel, Aug 2025STT - SJU
Read more JetBlue reviews

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.

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

It would have been nice if they had offered more than one set of snacks

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!

Except for the 28 minute delay leaving and the earlier reschedule to a later takeoff time the flight was good.

Overall was excellent. Will definitely us JetBlue in the future.

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

I rate it is good we had a 4-hour travel delay at one point but JetBlue gave out food vouchers and travel points credits for another flight so they try to make up for it

Smooth boarding and friendly crew. Unfortunately as soon as we boarded the unit that provides air circulation failed. The pilot informed us and requested maintenance technicians to check it out. The plane became uncomfortably warm without any fresh air coming in. Plus the repair delayed our departure. I am glad the maintenance crew were able to fix the problem. I also was without use of my tv monitor for the first 1/3rd of the trip.

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

Information on your arrival and departure airports

London (LHR)
Luis Munoz Marin Intl (SJU)

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