SJU - LHR

$326 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 3/6. 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
$535
Typical prices: $617-$803
British Airways
Tue 2/17Mon 3/2
SJU - LHR • 1 stop
Cheapest one-way
$326
Typical prices: $385-$471
JetBlue
Fri 3/6
SJU - LHR • 1 stop
Top airlines
British Airways
Cheapest • from $535 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
September
Cheapest • 24% price drop
April
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

Tue, Feb 17 - Mon, Mar 2
British Airways Logo
2:23 pm - 8:35 am
SJU
-
LHR
14h 12m
1 stop
British Airways Logo
7:05 pm - 7:55 pm
LHR
-
SJU
28h 50m
1 stop
$535British Airways
Mon, Feb 16 - Mon, Mar 2
Iberia Logo
6:10 pm - 10:35 am
SJU
-
LHR
12h 25m
1 stop
Iberia Logo
10:45 am - 7:55 pm
LHR
-
SJU
13h 10m
1 stop
$551Iberia
Tue, Mar 31 - Tue, Apr 7
British Airways Logo
11:46 am - 6:55 am
SJU
-
LHR
14h 09m
1 stop
British Airways Logo
9:10 pm - 10:05 pm
LHR
-
SJU
29h 55m
2 stops
$552British Airways
Wed, Feb 18 - Thu, Feb 26
British Airways Logo
2:23 pm - 8:35 am
SJU
-
LHR
14h 12m
1 stop
British Airways Logo
11:15 am - 9:34 pm
LHR
-
SJU
14h 19m
1 stop
$554British Airways
Mon, Feb 16 - Mon, Mar 2
Delta Logo
6:15 am - 6:25 am
SJU
-
LHR
20h 10m
1 stop
Delta Logo
6:30 am - 11:56 pm
LHR
-
SJU
21h 26m
2 stops
$557Delta
Mon, Feb 16 - Mon, Mar 2
British Airways Logo
6:10 pm - 10:35 am
SJU
-
LHR
12h 25m
1 stop
British Airways Logo
9:15 am - 7:55 pm
LHR
-
SJU
14h 40m
1 stop
$559British Airways
Wed, Apr 22 - Wed, Apr 29
United Airlines Logo
7:20 am - 10:40 am
SJU
-
LHR
22h 20m
1 stop
United Airlines Logo
6:50 am - 9:24 pm
LHR
-
SJU
19h 34m
2 stops
$560United Airlines
Wed, Apr 22 - Wed, Apr 29
United Airlines Logo
7:00 am - 7:40 am
SJU
-
LHR
19h 40m
1 stop
United Airlines Logo
12:15 pm - 9:24 pm
LHR
-
SJU
14h 09m
1 stop
$561United Airlines
Tue, Feb 17 - Thu, Feb 26
United Airlines Logo
2:05 am - 9:20 pm
SJU
-
LHR
15h 15m
1 stop
United Airlines Logo
8:30 am - 10:22 pm
LHR
-
SJU
17h 52m
2 stops
$562United Airlines
Wed, Feb 18 - Fri, Feb 27
Delta Logo
6:37 pm - 11:40 am
SJU
-
LHR
13h 03m
1 stop
Delta Logo
10:10 am - 11:58 pm
LHR
-
SJU
17h 48m
2 stops
$564Delta
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 February.

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 $629 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,217 and $1,139 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 1 week before departure. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$326
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly and prices are also 8% 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 3 days, the lowest price for a flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport was $326 for a one-way ticket and $534 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?

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

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

    The two airlines most popular with KAYAK users for flights from San Juan to London are Delta and Virgin Atlantic. With an average price for the route of $794 and an overall rating of 7.9, Delta is the most popular choice. Virgin Atlantic is also a great choice for the route, with an average price of $750 and an overall rating of 7.5.

  • 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 8066 reviews
8.5Crew
7.8Entertainment
7.2Food
8.1Boarding
7.9Comfort
Airline reviews

My bike did not arrive in Chicago alongside 2 bags. Hoping we get them tomorrow.

8.0 ExcellentJacob, Jan 2026
NBO - CDG
Read more Delta reviews

My bike did not arrive in Chicago alongside 2 bags. Hoping we get them tomorrow.

This flight was a first class choice and left much to be desired. Seat backs on seats were falling apart and torn. Seats actually didn't come to a "full & upright position". Pull out table was sprung. Not any significant leg room. All in all we were on an obviously older plane and felt overcharged for what we received as first class.

We had a lot of really rough weather but that was not Delta's fault. Pilot was amazing.

Plenty of leg room, temperature was great and staff was excellent. Would do it more often.

The crew was not very visible. This might be a good thing for people who wanted to sleep but seemed odd when compared to the Atlantic crossing where they are more present in the cabin. The Food (beef) was not good. Tough and tasteless. Would love to see more choices on a long flight like that.

Cramped seating for me. Luckily it wasn’t a long flight

Passengers need to check in big baggage instead of bringing on the plane. That cause inconvenience for everyone. Otherwise flight was good.

Great. Very smooth. Plenty of information. However, wish they would give out a menu in advance of making a dinner choice like other international airlines. The flight attendant says chicken or pasta and there are details about ingredients or spices requiring the passenger to ask which requires the flight attendant to answer many times. So easy to solve this problem. P

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Boarding was tough as we had to take a bus out to the plane and walk up a lot of stairs. Difficult with heavy carry-ons that said I got an entire empty row of seats, which was excellent for an international flight. Food was very mediocre but happy with the comfort so not complaining.

Food has been disappointing in both legs of flight to india

Great staff great experience, made a 2 hour delay very bearable

Great staff, great experience, made a 2 hour delay very bearable

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

I was my pleasure to fly virgin on my birthday for my first solo trip ever 🫶🏼

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

Overall, flight was excellent but check in was very slow for Premium Economy. Economy queue was shorter but we weren't allowed to use it.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

Great crew - old style upper class seats on the older fleet now feels dated

Premium economy more comfortable than economy, but not by much. Did was awful, do not try the omelette. Flight crew were helpful. Flight was delayed by over an hour. Overall but bad, arrived safely and thank God.

Some flight attendants were great others were cranky. Seats were very tight and sitting on an aisle was very hard as the carts and people walking constantly bumped shoulder and arm.

Very turbulent trip made it pretty bearable, plus the lack of refreshments served and the lack of any air conditioning before takeoff which took an hour or more.

Movie selection is good. Crew did not understand mileage program and were no help. Sick later. Food?

Ot was overall fine. Left on time and had basic snacks. Weather was finicky but that’s not the airlines fault.

One bag is incorrect and not acceptable for an international flight. The food was not just good. I won't fly with them again.

Food was poorly timed and not good.. Hand held snacks, really. I kept asking for water and never got any. Service was rushed for a 7-hour flight.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Not good , late, and long. We came home so late and spent so much time flying around and taxiing

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

Although the flight was delayed the crew and the flight itself were very good. Couldn't fault anything and after the disappointment of being abandoned in the US by BA it was a welcome relief to travel with United

Disliked having to wait a little longer to disembark from the plan when we landed in London

Food should be better quality. Video screens have poor resolution and the library of movies is poor. The other airlines are much better.

The trip was smooth but the crew were very abrupt, snatching things before finished and being quite snappy when asked questions.

My wife and I love to travel, so we fly a lot. We've already logged 381,075 miles and with practically every major airline. But this flight was very disappointing. It started off well, with no delays and a new plane. But when lunchtime approached, all that good impression was ruined. Instead of white tablecloths, we were offered small, dark placemats, which, as it turned out, were perfectly adequate for the food. All the food offered—and my wife and I only took fish, and the meat—was not just bad, it was downright disgusting and not heated enough. The same applies to the appetizers. This was the first time in many years of traveling that we've been offered such disgusting food.

Lost luggage stuck no clothes and no word after 2 days leaving on cruise no stuff or clothes

Don’t know they cancelled the flight day before I was to leave. They sent a email at 9:00 pm at night saying they cancelled. That is the smooth way to say we don’t want your business! I think they didn’t have enough people booking so they cancelled the flight! It’s all about the money anymore there is no honesty in business.

The flight was canceled 3 hours after original take off time

Pathetic check in experience at JFK. Everything is self check in. Not enough staff present to help with when the check in process or the kiosk gets stuck. Staff present not welcoming or pleasant at all. On the other hand the NY based flight crew was great. Courteous and friendly throughout the flight. Special meals leave a lot to be desired. Kids meals should be made available when kids are flying and same goes for special kids meals too.

Flight was full, and would have preferred an aisle seat, but due to getting a late ticket ,the seat I had was adequate. The flight crew were very help full and hard working. Food and drink were excellent for the 11hr flight. Overall I was pleased with flight, and would recommend British Airways again.

More choices on menu. Seemed only thing offered was Scottish, and while that’s good for the Scot’s it doesn’t help the Americans who don’t like that food. And I really hate it when, during sleep time the attendants have a very loud conversation right over you. Lastly, I paid 5000 dollars for business class, and having to pay more to choose my seat early is really an insult. Seems greedy

Flight was fine, price was good but food onboard was abysmal. I was on there for breakfast and lunch and dinner 845am EST to 845pm GMT and all I got was a yoghurt parfait, fruit and a piece of cake. Later snacks included an ice-cream brownie and a pizza twist. I was hungry by the time I landed and the airport amenities were closed. Not happy.

we were delayed because of some safety check that wasn't done or available

Checking In on JetBlue site was impossible. It hung up on REAL ID. Even my Global Entry did not help. Luckily, on Kayak site it was a breeze. Entire flight the temperature was COLD! Otherwise the crew was great!

I don’t usually fly budget airlines or airlines in the United States. It was as good as any other airline. The seats are comfortable and the airline attendants are not rude & surly. Very nice flight (s).

WiFi was not eorkig (again) And the plane was from 1990 with the screens which were.not touch and most didn’t even work and if lucky could tune in tv

Too many long delays with JetBlue. Worst major airline that serves JFK but unfortunately I keep going back because of the prices.

Ground crew gave me interference about carrying a laptop and a small shoulder bag, even though I told them I traveled with them all the time. I then placed my laptop bag in my carryon and took out a medical device, and ground crew still tried to give interference. I had to remind them that medical devices don't count towards luggage limits. It was quite annoying and unne

No overhead baggage room even though I was seated in row 2. Consequently had to check in my carry on bag. Baggage carousel was jammed. Took 45 min to get my bag.

Excellent from start to finish. All staff members were amazing!

Cancelled flight with no specific instructions to get a boarding pass for another flight. The whole flight of people were in line for an hour because there was only 1 person to help at the desk. This was unusual for JetBlue.

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

Information on your arrival and departure airports