LHR - SJU

$435 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 2/20. 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, 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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$650
Typical prices: $682-$921
JetBlue
Mon 2/9Thu 2/19
LHR - SJU • 1 stop
Cheapest one-way
$435
Typical prices: $536-$760
Multiple Airlines
Fri 2/20
LHR - SJU • 3 stops
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 13% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 15% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s 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 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.

Recent round-trip flight deals from London to San Juan

Mon, Feb 9 - Thu, Feb 19
JetBlue Logo
8:05 am - 7:23 pm
LHR
-
SJU
15h 18m
1 stop
JetBlue Logo
6:10 am - 6:55 am
SJU
-
LHR
20h 45m
1 stop
$650JetBlue
Tue, Feb 24 - Wed, Mar 11
Multiple Airlines Logo
8:50 pm - 7:55 pm
LHR
-
SJU
27h 05m
2 stops
Multiple Airlines Logo
9:25 pm - 8:05 pm
SJU
-
LHR
18h 40m
2 stops
$699Multiple Airlines
Sat, May 2 - Sat, May 16
JetBlue Logo
8:15 am - 9:01 pm
LHR
-
SJU
17h 46m
1 stop
JetBlue Logo
11:59 pm - 8:45 pm
SJU
-
LHR
15h 46m
1 stop
$793JetBlue
Mon, Feb 16 - Mon, Feb 23
Multiple Airlines Logo
8:50 pm - 4:35 pm
LHR
-
SJU
23h 45m
2 stops
Multiple Airlines Logo
9:25 pm - 9:10 am
SJU
-
LHR
31h 45m
2 stops
$795Multiple Airlines
Thu, May 21 - Mon, May 25
JetBlue Logo
8:15 am - 12:59 am
LHR
-
SJU
21h 44m
1 stop
JetBlue Logo
3:30 am - 8:45 pm
SJU
-
LHR
12h 15m
1 stop
$847JetBlue
Sun, Mar 15 - Wed, Mar 18
Multiple Airlines Logo
12:20 pm - 10:51 pm
LHR
-
SJU
14h 31m
1 stop
Multiple Airlines Logo
9:25 pm - 8:05 am
SJU
-
LHR
30h 40m
2 stops
$854Multiple Airlines
Wed, Feb 25 - Thu, Mar 5
TAP AIR PORTUGAL Logo
6:00 am - 3:51 am
LHR
-
SJU
25h 51m
2 stops
TAP AIR PORTUGAL Logo
3:50 pm - 6:55 pm
SJU
-
LHR
23h 05m
2 stops
$889TAP AIR PORTUGAL
Thu, Apr 30 - Sat, May 9
TAP AIR PORTUGAL Logo
6:00 am - 2:39 am
LHR
-
SJU
25h 39m
2 stops
TAP AIR PORTUGAL Logo
3:40 pm - 5:45 pm
SJU
-
LHR
21h 05m
2 stops
$905TAP AIR PORTUGAL
Mon, Feb 9 - Mon, Feb 23
Multiple Airlines Logo
8:50 pm - 7:55 pm
LHR
-
SJU
27h 05m
2 stops
Multiple Airlines Logo
9:25 pm - 9:10 am
SJU
-
LHR
31h 45m
2 stops
$906Multiple Airlines
Tue, Feb 24 - Wed, Mar 11
TAP AIR PORTUGAL Logo
6:00 am - 3:51 am
LHR
-
SJU
25h 51m
2 stops
TAP AIR PORTUGAL Logo
2:05 pm - 3:30 pm
SJU
-
LHR
21h 25m
2 stops
$909TAP AIR PORTUGAL
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 round-trip flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport?

This analysis is based on the cheapest round-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 February.

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 $738 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $1,309 and $1,027 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 13% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Find deals

Good to know

Low seasonJune
Cheapest flight$435
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly with an average 49% increase in price.
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 $435 for a one-way ticket and $650 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.

  • 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 2890 reviews
6.6Food
7.2Entertainment
8.0Crew
7.5Comfort
7.4Boarding
Airline reviews

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

6.0 GoodAnonymous, Dec 2025
DOH - IAD
Read more JetBlue reviews

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.

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.

Worst flight experience ever flights canceled. JetBlue told us just did not even bother standing in line to come back in one and a half hours then without any information we had to go pick up all of our luggage and spend over $2000 in accommodation just to get home. JetBlue said that the next flight available for us to get home would be three days later. Absolutely absurd hasn’t offered to give us any compensation do not fly JetBlue horrible company. They said it was based on the weather and the weather is great in all locations that we would’ve been flying to total hoax. I think it’s a conspiracy theory.

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.

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)