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SJU - LHR

£321 Find cheap flights from San Juan to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Juan to Heathrow departing on 9/7. 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
0 bags
Fri 7/6
Fri 14/6

Search hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Juan to London, 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 San Juan to London, as well as popular online travel agencies
In the last 7 days, travellers have searched 43,968,530 times on KAYAK, and here's why:

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Cheap flight deals from San Juan to Heathrow (SJU-LHR)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Juan to Heathrow 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 and deals for you by selecting your travel dates.
Choose your dates
14:09 - 09:25SJU-LHR
14h 16m1 stop
10:55 - 19:45LHR-SJU
12h 50m1 stop
£491Iberia
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Tue, 22 Oct - Tue, 5 Nov
09:55 - 09:30SJU-LHR
18h 35m1 stop
11:55 - 01:31LHR-SJU
18h 36m1 stop
£506JetBlue
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Wed, 9 Oct - Wed, 16 Oct
16:03 - 10:50SJU-LHR
13h 47m1 stop
07:40 - 21:42LHR-SJU
19h 02m2 stops
£531American Airlines
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Wed, 9 Oct - Wed, 16 Oct
15:54 - 11:15SJU-LHR
14h 21m2 stops
08:50 - 21:42LHR-SJU
17h 52m2 stops
£534American Airlines
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Wed, 9 Oct - Wed, 16 Oct
12:03 - 07:05SJU-LHR
14h 02m1 stop
06:15 - 18:20LHR-SJU
17h 05m1 stop
£538British Airways
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Wed, 11 Sep - Tue, 24 Sep
14:09 - 09:25SJU-LHR
14h 16m1 stop
10:50 - 18:20LHR-SJU
12h 30m1 stop
£553British Airways
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Wed, 11 Sep - Tue, 24 Sep
01:05 - 20:40SJU-LHR
14h 35m1 stop
13:00 - 23:57LHR-SJU
15h 57m1 stop
£575United Airlines
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Tue, 10 Sep - Tue, 24 Sep
01:05 - 20:40SJU-LHR
14h 35m1 stop
12:15 - 23:57LHR-SJU
16h 42m2 stops
£576United Airlines
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Sun, 8 Sep - Wed, 18 Sep
01:05 - 06:30SJU-LHR
24h 25m2 stops
09:30 - 23:57LHR-SJU
19h 27m2 stops
£582Air Canada
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Tue, 10 Sep - Tue, 24 Sep
01:05 - 06:30SJU-LHR
24h 25m2 stops
14:05 - 13:40LHR-SJU
28h 35m2 stops
£661Air Canada
Find Deal
Thu, 17 Oct - Sat, 26 Oct

Flights from San Juan to Heathrow - Travel Insights & Trends

Get data-powered insights and trends into flights from San Juan to Heathrow 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 San Juan to London Heathrow Airport?

The average price of all flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport clicked on KAYAK for each day over the last 12 months.
If your flying dates are flexible, you should consider flying to London Heathrow Airport on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from San Juan to London Heathrow Airport. For your return ticket, we recommend flying on a Wednesday and avoiding Sundays for the best deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow 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 San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport is February, where tickets cost £536 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is £1,024 and £927 respectively.

How far in advance should I book a flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 33 days before departure.

Which airlines provide the cheapest flights from San Juan to London Heathrow Airport?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 3 days, JetBlue offered the best one-way deal for that route, at £338. KAYAK users also found San Juan to London Heathrow Airport return flights on Iberia from £491 and on JetBlue from £506.

Good to know - Cheap tickets from San Juan to London Heathrow Airport

Low season

January

High season

November

Cheapest flight

£321
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly and prices are also 8% lower on average.
Flight from San Juan to London Heathrow Airport

When to book flights from San Juan to Heathrow

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

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

    In the last 3 days, the lowest price for a flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport was £403 for a one-way ticket and £616 for a return.

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

    San Juan and London Heathrow Airport are both served by 1 main airport. You will leave San Juan from San Juan Luis Munoz Marin Intl and will be arriving at London Heathrow.

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

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

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

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

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

    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 San Juan to London Heathrow Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Juan to London Heathrow Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from San Juan 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 San Juan to London Heathrow Airport?

    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 London Heathrow Airport with an airline and back to San Juan with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Juan to London Heathrow Airport?

    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 London Heathrow Airport from San Juan up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airline flying from San Juan to Heathrow

 
See real verified KAYAK customer reviews for airlines flying from San Juan to London. 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 San Juan to Heathrow? 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.
6.8
British AirwaysOverall score based on 6868 reviews
7.0Boarding
6.5Entertainment
7.7Crew
6.4Food
6.8Comfort
Airline reviews

There's no inflight entertainment, plane was old, power USB didn't work

6.0 GoodOmar, May 2024BCN - LHR
Read more about British Airways reviews

There's no inflight entertainment, plane was old, power USB didn't work

We missed the flight to Barcelona because the flight from Baltimore was delayed. We flew on Vueling VW6653. Our luggage didn’t arrive. Please help us get our luggage. We are staying at Hotel Gran Via in Barcelona

They allowed some guy to move seats after 3hours of him being next to someone very sick, There were several empty seats, but they moved him to mine. I find that incredibly inconsiderate and should not have been done.

Excellent. Very nice and comfortable business class. Only negative is that it was difficult to hear the pilot’s announcement.

Food not so good. Need more veggies and whole grain especially the late food. Couldn’t figure out how to use the entertainment system.

Check in was horrendous! Economy took 2 hours before seeing an agent. Business class was 0.5 - 1 hour.

The first class flight itself was first class, however getting to the airport and getting through the airport was agony. The BA flight sat on the taxiway for ages and caused us to miss our connecting flight which meant half a day lost. Our return flight on BA was cancelled so a dawn flight was made and we lost another half day. Goodby BA

In economy and food was ok, but with limited leg space (and I was in a 2 seat configuration) it was difficult to eat with a tiny seat tray. I spilt wine on my trousers. First time on British Air (I usually fly Turkish Air) and in a 777. Heathrow was pleasant but changing terminals awkward.

Starting with the flight Cairo to London the plain was so poor no entertainment at all uncomfortable seats although it’s 5 hours long,then an American airline plain took me from London to Miami it was a bad experience the crew most of flight time not available and they asked us to help our selves for any snacks if we need. From Miami to London actually was perfect flight with a huge plain and perfect crew but from London to Cairo was horrible plain with stiff fixed seats not movable no entertainment or wi fi very poor Menu which is unacceptable for a business class

There was some delay at Heathrow where a machine needed to "start the engines" wasn't available and they couldn't even find the team tasked to do it. Unacceptable. Caused about an hour delay and seemed unnecessary. Also saw several passengers abusing the overhead luggage situation, having too many large bags and not leaving enough space for others. The crew was good and the refreshments were good in quality and quantity.

Book cheap flights from San Juan to London

Cheapest flights to London from San Juan found in 2024

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from San Juan to London found on KAYAK in the last 72 hours.
9/7Tue
2 stops
25h 15mSJU-LHR
£321
1/11Fri
1 stopJetBlue
12h 31mSJU-LHR
£338
9/7Tue
2 stopsUnited Airlines
24h 40mSJU-LHR
£420
10/7Wed
2 stopsUnited Airlines
22h 35mSJU-LHR
£439
4/10Fri
2 stopsAir Canada
38h 55mSJU-LHR
£459
5/10Sat
2 stopsAmerican Airlines
22h 01mSJU-LHR
£470
1/11Fri
2 stopsTAP AIR PORTUGAL
19h 01mSJU-LHR
£474
4/10Fri
2 stopsAir Canada
38h 55mSJU-LHR
£475
4/6Tue
2 stopsTAP AIR PORTUGAL
24h 59mSJU-LHR
£503
8/7Mon
1 stopAmerican Airlines
26h 00mSJU-LHR
£563

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San Juan - London Heathrow Airport Flights

Departure:

San Juan (undefined)Puerto Rico

Destination:

London Heathrow Airport (LHR)United Kingdom

Return flight deals:

London Heathrow Airport - San Juan

Cabin classes: