SJU - LHR

$307 Find Cheap Flights from San Juan to London

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 London departing on 11/16. 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 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
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Everything you should know

Cheapest round-trip
$810
Typical prices: $992-$718
Iberia
Wed 11/11Tue 11/24
SJU - LHR • 1 stop
Cheapest one-way
$307
Typical prices: $311-$422
United Airlines
Mon 11/16
SJU - LHR • 2 stops
Top airlines
Cheapest • from $810 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between San Juan and London. You'll need at least 1 connection.
Insights
Insights
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Insights
Top layover airports
Cheapest • Avg $649 (round-trip)
Shortest trip • 13h 03m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 34% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 27% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San Juan to London (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 London 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 San Juan to London

Wed, Nov 11 - Tue, Nov 24
Iberia Logo
6:10 pm - 2:55 pm
SJU
-
LHR
16h 45m
1 stop
Iberia Logo
6:05 am - 4:40 pm
LHR
-
SJU
14h 35m
1 stop
$810Iberia
Sun, Sep 20 - Fri, Sep 25
American Airlines Logo
4:06 pm - 12:10 pm
SJU
-
LHR
15h 04m
1 stop
American Airlines Logo
6:15 am - 6:50 pm
LHR
-
SJU
17h 35m
1 stop
$815American Airlines
Wed, Oct 7 - Wed, Oct 14
Iberia Logo
2:00 pm - 9:00 am
SJU
-
LHR
14h 00m
1 stop
Iberia Logo
6:15 am - 8:10 pm
LHR
-
SJU
18h 55m
2 stops
$817Iberia
Wed, Nov 18 - Fri, Nov 27
Air Canada Logo
8:30 am - 7:10 am
SJU
-
LHR
18h 40m
2 stops
Air Canada Logo
6:50 am - 2:05 pm
LHR
-
SJU
35h 15m
2 stops
$818Air Canada
Tue, Sep 22 - Tue, Sep 29
Iberia Logo
8:05 pm - 7:10 pm
SJU
-
LHR
18h 05m
1 stop
Iberia Logo
6:15 am - 8:47 pm
LHR
-
SJU
19h 32m
2 stops
$820Iberia
Tue, Nov 17 - Thu, Dec 3
Delta Logo
2:05 pm - 6:55 am
SJU
-
LHR
12h 50m
1 stop
Delta Logo
6:30 am - 11:55 pm
LHR
-
SJU
21h 25m
2 stops
$821Delta
Wed, Nov 11 - Tue, Nov 24
KLM Logo
2:05 pm - 10:15 am
SJU
-
LHR
16h 10m
1 stop
KLM Logo
8:40 am - 11:13 pm
LHR
-
SJU
18h 33m
2 stops
$822KLM
Wed, Nov 11 - Tue, Nov 24
Multiple Airlines Logo
3:35 pm - 1:45 pm
SJU
-
LHR
18h 10m
2 stops
Multiple Airlines Logo
8:40 am - 11:13 pm
LHR
-
SJU
18h 33m
2 stops
$826Multiple Airlines
Wed, Nov 18 - Fri, Nov 27
United Airlines Logo
3:05 pm - 9:10 am
SJU
-
LHR
14h 05m
1 stop
United Airlines Logo
7:30 am - 10:22 pm
LHR
-
SJU
18h 52m
2 stops
$832United Airlines
Wed, Nov 18 - Fri, Nov 27
United Airlines Logo
3:05 pm - 9:10 am
SJU
-
LHR
14h 05m
1 stop
United Airlines Logo
7:30 am - 10:22 pm
LHR
-
SJU
18h 52m
2 stops
$833United Airlines
Booking Insights

KAYAK's insights & trends for San Juan to London flights

Get data-powered insights and trends into flights from San Juan to London to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow 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 San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport departing in November.

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 round-trip 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 September, where tickets cost $618 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,131 and $1,108 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip 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 week.

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 2 weeks before departure, which saves you about 34% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 2 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$307
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from San Juan to London

When to book flights from San Juan to London

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

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

    In the last 5 days, the lowest price for a flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport was $307 for a one-way ticket and $810 for a round-trip.

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

    Yes

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

    San Juan and London 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?

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

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

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

  • Which is the best airline for flights from San Juan to London, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from San Juan to London are Delta and United Airlines. With an average price for the route of $865 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $829 and an overall rating of 7.4.

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

    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.

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

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

    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 London with an airline and back to San Juan with another airline. Booking your flights between San Juan and LHR 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 San Juan to London?

    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 from San Juan 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 serving from San Juan to London

 
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 London? 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.
7.9
DeltaOverall score based on 8397 reviews
8.1Boarding
8.5Crew
7.8Entertainment
7.8Comfort
7.2Food
Airline reviews

If you cant travel Delta One, Comfort Class is the next best thing!

10.0 ExcellentBud, Jun 2026
ATH - BOS
Read more Delta reviews

If you cant travel Delta One, Comfort Class is the next best thing!

The seats were really comfortable. Flight crew were friendly with passengers. Overall was a great flight.

Great crew, flight on time, luggage pick up a breeze

The crew were efficient. The pilots seemed professional. It was a bit chilly in our seats. The sheet provided weren’t very helpful.

The Boarding process was great. Particularly since my wife and I require assistance. The flight attendants were amazing. We travel frequently; they honestly were a cut above. 😀

Much better than I expected. I had an economy ticket so I was really happy the flight was so comfy and the service so generous. Passengers were all polite too.

Much better than Latam, the worse airline company ever. I hope I don't have the need to fly Latam ever in my life again.

The only thing I would say is we tried to get on a standby earlier flight, but with our fair we couldn’t. That seems senseless to leave with open seats..

The plan was delayed and left DC 90 minutes late. However, it showed a 20 minute delay on the delta app, then a 12 min delay. It turned out to be an hour delay. I found out where the plane was with flightaware. Stop keeping customers in the dark about what is going on.

Everything was great until I lost my water bottle and they can’t seem to locate it. I know I left it on the plane though.

Everything was the best it could be. Crew found me with pre- ordered food. Excellent experience!

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

My service dog and I were asked to deplane just before they closed the door - clearly very last minute they couldn’t find the documentation that I have filled out many many times before that is for flying service animals. I purposely purchase 3seats (a whole row) since he is large and not all passengers want to sit next to a dog on a cross country flight. The plane departed with my husband on it!!! They made me fill out a hard copy of the same form and had to reschedule me on a later flight where they could find 3 seats together!! I’ve done this so many times before - clearly the error was on their part in a technology glitch - but really people - do better!! Very traumatic - and my husband had to wait for us when he landed ….so bad. Poor pup was confused and tired.

Cree was organized and pleasant. Plane had good seating but as it’s a shuttle toilets hadn’t been thoroughly cleaned (eg. bins too full)

The rear seat on the second leg should be illegal. There’s no way you should make somebody sit that close to the washroom. Very awkward.

The crew was generally professional. Though one of the crew members seemed to be easily annoyed, the others were fine and helpful. The green olives and almonds snack was really good. A great idea, and nice balance of tastes.

All good flight was 35 minutes early when arriving in Edinburgh

one staffer was frustrated (it happen); the flight was late and the pilot mentioned they'll make amend but the snacks were the same, other than that the aircraft was clean and everything went smooth, no complaints

Overall, the flight was good. Lounge access should be with all business class tickets.

I've been flying American mostly, and it's been very frustrating. This united flight makes me realize maybe the issue isn't flying, but the airline. United was a significantly better experience. The plane was more comfortable, with a normal amount of leg room (vs the ridiculous reductions AA has made), more comfortable seats, screens to watch movies. It was a much better experience!

One checkin and gate attendant was very nice. Another was just making everyone check their bags and slowing down the boarding too. This was an A310 so good over bin space. Seats kind of weird, cushion sticking up in the back pushing forward

The food on my AA flights was horrible, it wasn't filling either. Additionally, my bag was delayed and was damaged when delivered. However, the airline made it impossible for me to file a complaint. Had a stressful travel as multiple flights were delayed, causing unnecessary stress due to fear of missing connecting flights. Awful experience. Experience with British Airways was better than American.

I wouldn’t like to have been told what gate I would connect at ahead of time. It was rather stressful, considering the fact that I only had an hour turnaround time between flights

Luggage did not make it onto my plane. Business seats were economy with empty row seat. Just horrible experience. Why would the company allow for transfers that don’t give employees enough time to transfer luggages??

For an long range economy flight I feel more space and more meal options need to be offered for flights over 5 hours

The check in agents in PHL and gate agents had to have been the rudest women that I have ever encountered; the agent weighing the bags at check in screamed continuously at all of the guests as did the woman at the gate.I have Executive Platinum status with AA and fly a lot with AA but these ladies were the absolute worst I had the displeasure to encounter!

Because of Marseilles' antiquated process of checking passports, we headed for London nearly missed our flight. In fact five people did and had to have their bags removed from the plane as boarding had closed. As I recall the seating gave us a little more leg room than the seating going from London to DFW on American.

B-class on an old plane with antiquated amenities and poor service. Landed in Rome w/o bag that didn’t make the connection (plenty of time in London). Bag will come to hotel NOT the day it lands but the following night!! Still waiting for bag…BA had nothing to offer in support and couldn’t even tell me their comp, told to submit receipts and then I’ll learn what is or isn’t covered.

It's a long flight and that is always difficult. I was comfortable and well. The movies available were great and the crew was good.

Premium Economy Good crew, good service, excellent food. Seat back screen just not bright enough.

You should have had Wifi to make it much enjoyable.

Boarding was extremely slow and disorganized. Onboard crew was unfriendly.

Direct tv did not work on flight Short flight so no good service offered Arrived early to destination and had to wait for gate to open. Deplaned LATER than if we arrived on time!! Poor planning Jet blue has had something go wrong on every flight I’ve taken with them in last five years. Terribly run airline

Easy experience even with the outbound flight being delayed. The seating and space was comfortable and the crew seemed very nice and helpful.

Excellent price. Everything on time. two bad parts. Kayak said I couldn't sign in for the flight online, but I got an email at the same time from Jet Blue and they let me sign in online. Second bad part was that, although I had provided my known traveler number, neither of my boarding passes, for this flight and the previous one, had TSA pre-check showing.

My experience with JetBlue was fine BUT I am very upset with Kayak! JetBlue had delayed our scheduled departure by an hour and you NEVER notified me of the change. I did not hear directly from JetBlue because the trip was booked through Kayak, a mistake I will not repeat. Your reminder of the our trip last week still had the WRONG departure time. Our return trip has also changed, and again no notice from you.

we were an hour delayed after boarding and given no reason. Headsets cost money. Also there were openrows with no one setting in them but we were told we were not allowed to swtich.

Flight was smooth, amenities (entertainment options and power outlets) were good, sears decent)

Flight team was very courteous only complaint wS the boarding process and mandatory bag check

It was a great flight got here on time wish they would give headphones out for free

Horrible seat at the back. Crew was very kind. Packed plane. Wordy pilot bragging about Iberia being punctual when many of us came from Alicante flight that was delayed an hour and many lost connection and we lost our luggage. Still waiting for it

Flight was fine - however my husband's checked in case was damaged, and mine still has not arrived

The boarding procedure got confusing because they wanted to weigh everyone’s carry-on. Apparently mine was 3 1/2 kg over their limit. I didn’t know they had a limit. And at the check-in desk, nothing was said about this. They wanted me to check the carry-on at no charge and that would have been fine except then they told me at my connection in London I would have to go outside to baggage claim retrieve my bag, and then recheck it. In other words, they could not check it to my final destination, only to London. I told him this was unacceptable so after a few minutes of discussion, they came back and said that my bag would be OK to carry on the plane. It seems that if you have a connection then the weight is not as important. Then when I actually went to board the boarding agent said I needed a tag indicating that my bag had been weighed, even though she had just five minutes ago talked to the same person who cleared me. Lots of confusion seems like a very bad process. They need to improve this.

My flight being automatically moved messed up my travel plans, and I had to quickly find an alternative mode of transportation. I couldn’t get a refund from any of the companies involved. Kayak, Ibiza, or Vueling. I am still unsure of how to settle my concern.

the seats were so cramped you could barely move. it was difficult to eat when passengers would recline their seats. the seats were so flimsy and unstable that whenever someone got in and out of their seat, it bounced like a spring back in your face. the movies were nice. the food was terrible. even though the conditions were terrible, they tried to pressure passengers to relocate their seats to accommodate adults who were related and wanted to sit next to each other, even after the passengers expressed that they did not want to move for that purpose. on the connecting flight, the “service” consisted of items for purchase. even though the flight was only 45 minutes, once again passengers (including me) were pressured to relocate for people to sit next to each other. they couldn’t be apart for 45 minutes? this was much less compelling than being apart for an 8 hour flight.

I've taken British Airways before and it has been great. On this trip to Spain and Portugal we had two BA flights. On both flights we were taken by bus from the terminal out to the plane on the tarmac. There were many older folks on these flights, and to ask people in their 70s to lug their carry-on and personal items up the long mobile staircase to the plane entrance, is very disturbing. I won't be taking British Airways in the future. Many people on these flights were very unhappy.

The food on the flight was of marginal quality. Small bits of chicken, instant mashed potatoes and some carrots. The rolls were very dry, nearly inedible. The seats were quite small and didn’t allow for any shifting of position during the flight. There was limited leg room.0

Terrible customer service. I booked business class and the counter agent didn’t bother asking me about any choice or preferred seat, basically assigned me that last seat and couldn’t even answer if it was a business class seat. Also iberia lost my suitcase on my flight from JFK to MAD with the layover in BCN. Useless customer service at the counter. Thank goodness I happened to check the baggage claim area of the next flight in…there it was.

It was fortunate that the flight arrived in London in accordance with schedule, and the luggage was promptly transferred to the luggage carousel. However, I find it concerning that even minor issues in economy cabins are prevalent within the industry. American Airlines, in particular, appears to have the least legroom and feels more crowded due to the proximity of neighboring passengers. Additionally, the crew’s adherence to protocol is inconsistent. While they may enforce certain rules set by the FAA on a select few individuals, they often overlook numerous violations, such as failing to reset seat recline during landing.

Easy and organized getting in and out of the flight

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

Information on your arrival and departure airports