LHR - SJU

$681 Find Cheap Flights from London to San Juan

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to San Juan departing on 9/3. 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

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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Flights Deals

Cheap Flights from London to San Juan

 
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.

Recent round-trip flight deals from London to San Juan

KAYAK's recommended round-trip deals from the most popular airlines that fly from London to San Juan.
Discover the best prices for you by selecting your travel dates on KAYAK.
JetBlue Logo
8:15 am - 9:18 pmLHR-SJU
18h 03m1 stop
JetBlue Logo
12:55 pm - 6:30 amSJU-LHR
12h 35m1 stop
$681JetBlue
Find Deal
Wed, Sep 3 - Thu, Sep 18
JetBlue Logo
8:15 am - 9:18 pmLHR-SJU
18h 03m1 stop
JetBlue Logo
12:55 pm - 6:30 amSJU-LHR
12h 35m1 stop
$683JetBlue
Find Deal
Wed, Sep 3 - Thu, Sep 18
Logo
7:40 pm - 10:00 amLHR-SJU
19h 20m1 stop
Logo
9:30 pm - 7:45 pmSJU-LHR
17h 15m1 stop
$788
Find Deal
Sat, May 17 - Fri, May 23
Logo
8:10 pm - 10:00 amLHR-SJU
42h 50m2 stops
Logo
9:30 pm - 7:45 pmSJU-LHR
17h 15m1 stop
$789
Find Deal
Tue, May 27 - Tue, Jun 3
Icelandair Logo
9:25 pm - 6:05 pmLHR-SJU
25h 40m2 stops
Icelandair Logo
6:00 am - 11:55 amSJU-LHR
24h 55m2 stops
$1,023Icelandair
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Sat, May 17 - Fri, May 23
Icelandair Logo
9:25 pm - 5:30 pmLHR-SJU
25h 05m2 stops
Icelandair Logo
6:00 am - 11:55 amSJU-LHR
24h 55m2 stops
$1,106Icelandair
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Tue, May 27 - Tue, Jun 3
Lufthansa Logo
9:30 am - 11:57 pmLHR-SJU
19h 27m2 stops
Lufthansa Logo
1:30 pm - 7:15 amSJU-LHR
12h 45m1 stop
$1,142Lufthansa
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Fri, Sep 26 - Mon, Oct 6
Avianca Logo
10:05 pm - 4:50 pmLHR-SJU
23h 45m1 stop
Avianca Logo
2:10 pm - 3:35 pmSJU-LHR
20h 25m2 stops
$1,149Avianca
Find Deal
Sat, May 17 - Fri, May 23
Avianca Logo
10:05 pm - 11:55 amLHR-SJU
18h 50m1 stop
Avianca Logo
2:10 pm - 3:35 pmSJU-LHR
20h 25m2 stops
$1,152Avianca
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Fri, Jun 13 - Fri, Jun 20
Lufthansa Logo
12:00 pm - 11:57 pmLHR-SJU
16h 57m1 stop
Lufthansa Logo
7:00 am - 6:20 amSJU-LHR
18h 20m2 stops
$1,875Lufthansa
Find Deal
Fri, Aug 8 - Mon, Aug 11
Useful Info

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 September, where tickets cost $657 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is $1,134 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. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

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Good to know

Low seasonJune
High seasonNovember
Cheapest flight$681
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly and prices are also 12% 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 $683 for a one-way ticket and $681 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?

    oneworld, Star Alliance, 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.

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.
7.3
JetBlueOverall score based on 2922 reviews
6.7Food
7.3Entertainment
8.0Crew
7.6Comfort
7.5Boarding
Airline reviews

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

10.0 ExcellentMichelle, Apr 2025LHR - JFK
Read more JetBlue reviews

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.

Love the mosaic program, being able to move to an extra space seat for free is awesome

Flight was on time arrived at the destination 10min early they kept in touch via email

I paid for the service of having the right to choose my seat and it was not like that, they put me where they wanted and I explained to one of the staff that they were before boarding and they were very rude. I am traveling with the family and they put us in separate seats.

The flights are back on time and everything else runs perfectly.

I volunteered to let them put my carry on suitcase in the baggage storage area. But when we landed I was told it was being unloaded IN A DIFFERENT TERMINAL! I had to walk (painful for me) a long way to retrieve my bag and my ride had to move from the waiting area they were in to a totally different one. Not happy.

Flight was delayed by almost 5 hours. Suitcase was not loaded despite the flight being near empty (my colleagues’ suitcases did reach JFK, unlike mine). Had to argue on phone to get JetBlue to deliver the case to my hotel. Never again

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

Information on your arrival and departure airports

Luis Munoz Marin Intl (SJU)
London (LHR)

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