SJU - LHR

$306 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 7/15. 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

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.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Juan to London.
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Flights 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, Oct 28 - Thu, Nov 6
JetBlue Logo
12:59 am - 8:45 pmSJU-LHR
15h 46m1 stop
JetBlue Logo
12:20 pm - 2:45 amLHR-SJU
18h 25m1 stop
$649JetBlue
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Tue, Oct 28 - Thu, Nov 6
JetBlue Logo
12:59 am - 8:45 pmSJU-LHR
15h 46m1 stop
JetBlue Logo
12:20 pm - 1:43 amLHR-SJU
17h 23m1 stop
$650JetBlue
Find Deal
Tue, Sep 2 - Tue, Sep 9
Iberia Logo
1:40 pm - 10:35 amSJU-LHR
15h 55m1 stop
Iberia Logo
6:10 am - 6:30 pmLHR-SJU
17h 20m1 stop
$667Iberia
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Sun, Aug 24 - Mon, Sep 8
Iberia Logo
12:00 pm - 9:25 amSJU-LHR
16h 25m1 stop
Iberia Logo
6:45 pm - 3:05 pmLHR-SJU
25h 20m1 stop
$678Iberia
Find Deal
Wed, Aug 6 - Thu, Jan 29
JetBlue Logo
3:25 am - 8:45 pmSJU-LHR
12h 20m1 stop
JetBlue Logo
8:25 am - 11:00 pmLHR-SJU
18h 35m1 stop
$679JetBlue
Find Deal
Wed, Sep 10 - Thu, Sep 18
American Airlines Logo
4:42 pm - 12:45 pmSJU-LHR
15h 03m1 stop
American Airlines Logo
7:45 am - 6:35 pmLHR-SJU
15h 50m2 stops
$694American Airlines
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Wed, Sep 10 - Thu, Sep 18
American Airlines Logo
4:42 pm - 12:45 pmSJU-LHR
15h 03m1 stop
American Airlines Logo
7:45 am - 6:35 pmLHR-SJU
15h 50m2 stops
$695American Airlines
Find Deal
Wed, Oct 29 - Fri, Nov 7
Delta Logo
7:30 am - 6:25 amSJU-LHR
18h 55m2 stops
Delta Logo
12:30 pm - 11:17 pmLHR-SJU
14h 47m1 stop
$758Delta
Find Deal
Mon, Oct 13 - Mon, Oct 20
Delta Logo
2:15 pm - 1:30 pmSJU-LHR
18h 15m2 stops
Delta Logo
8:10 pm - 1:23 pmLHR-SJU
22h 13m2 stops
$765Delta
Find Deal
Sat, Nov 15 - Sun, Nov 30
Virgin Atlantic Logo
6:20 pm - 8:10 pmSJU-LHR
21h 50m1 stop
Virgin Atlantic Logo
8:00 pm - 12:58 pmLHR-SJU
20h 58m1 stop
$824Virgin Atlantic
Find Deal
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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.

What’s the cheapest day of the week to fly from San Juan to London?

The average price of all round-trip flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to London on a Wednesday and more expensive on a Friday. On your return trip to San Juan, you should consider flying back on a Wednesday, and avoid Mondays for better 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 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 October, where tickets cost $703 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,185 and $947 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 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Good to know

Low seasonOctober
High seasonJuly
Cheapest flight$306
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 16% increase in price.
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 $306 for a one-way ticket and $649 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, SkyTeam, and oneworld 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 $797 and an overall rating of 8.0, Delta is the most popular choice. Virgin Atlantic is also a great choice for the route, with an average price of $840 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.
8.0
DeltaOverall score based on 7964 reviews
7.9Entertainment
7.9Comfort
7.3Food
8.2Boarding
8.5Crew
Airline reviews

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

10.0 ExcellentTim, Jun 2025SFO - MSP
Read more Delta reviews

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

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.

Delta flight was on time, seats were comfortable, and crew was nice.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

The Dekta Rep that checked us in was great. She's very personable, pleasant, and can tell she enjoys her job.

Zero updates from the pilots for 30 minutes in the tarmac

This was the second flight this week with flight attendant Marcus I’m not sure if his last name is Lane or Lang but this guy is awesome. He funny, attentive and his service is 5 stars. Marcus makes business travel more enjoyable !

Great service. Great staff. Boarding was a little slow, but I think there was a service dog slowing things down.

All fine save for the abominable catering. Really gone downhill. We found it all inedible.

I appreciated friendly service from check-in, to boarding, to in-flight amenities! Attendants were accommodating and helpful. Thank you! Elaine

The crew was excellent as ever on Virgin. The special meal was poor unfortunately. More significantly when we arrived at Manchester Airport there was no air bridge provided and we had to exit the plane down a rickety stair case. This is unacceptable for a transatlantic flight. Whilst I understand that this is the airport’s fault at the end of the day the airline is responsible for our transportation and needs to do something.

Super friendly and helpful staff, from check-in desk to cabin crew.

Following a paid seat upgrade for enhanced comfort, I encountered an unacceptable odor in my assigned area. It took three hours for the crew to relocate me, and the replacement seat was unacceptably close to the lavatory, offering no improvement.

Good overall. Cannot fault the airlines. I have had better entertainment systems before ie ice in Emirates but it was not too bad. Food was decent and staff were friendly.

I did not fly by vergin atlantic from bangalore to vasco da gama

Your flight delayed at Heathrow n I almost missed my mother funeral.you idiots. I had to waste 10 hours in different airports. Thank your stars I'm not suing you.

Miami airport needs more thorough signage. It was a long walk from my transport point to the check in desk,

Flight took off an hour late. Had to stay on the tarmac for half an hour after landing. Both annoying.

We had an unfortunate experience where we had to leave the aircraft after boarding, shortly before the scheduled takeoff time, and re-board. The reason given was that a passenger felt ill and had to cancel their plans and therefor their luggage had to be found and removed.

We’ve used VA before many times the experience is always been good they have lovely staff and the food is always delicious.

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.

Overall was excellent. Will definitely us JetBlue in the future.

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 like their airplanes because they have plenty of legroom in their seats they always work with me if I have a change of plans on my tickets courteous and I always feel safe flying with them.

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

They announced at the last minute that international travelers had to checkin at counter. This created a long line and unnecessary stress.

Going through JFK’s security is a mess. The TSA security said no shoes on the bins. So, we place our shoes in the belt and they came out all over the belt. Boarding was delayed and Flight as well.

Terrible. Flight was cancelled due to the weather in the east and sout east(florida). Did not get any compesation of any kind. According to them, it was not under their control so I lost all the money paid for the 2 fairs from Raleigh, NC to Orlando, Fl.

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

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

The chicken adobo was a little too spicy but good otherwise. My personal opinion. Movie selection could be improved, too many horror movies. Could add a few more chick flicks! The flight was bumpy at times. We arrived a little early too! Flight attendants friendly.

Again flight was awesome except British Airways lost both gate checked luggage’s. Still missing

really bad they refused to check in luggages that I had purchased, even showing them the transaction receipt from british airways app the staff in miami was MEDIOCRE

Crew was great and responsive. Entertainment quit working with about 4 hours remaining on the flight. My seat cushion was broken.

Not very good , the stewardess were unfriendly and they don't like to be bothered. Cos was a night flight and they need to sleep.

British Airways staff are very polite and willing to help.

This particular flight wasn't very full at the back, so there were three seats available for spreading out and getting relatively comfortable

From boarding, to attention in flight, I couldn’t fault it.

Not having to check carry on bags when plane wasn’t full. (The told us it was)

The flight was delayed twice. When the crew explained about the debris causing flat tires, I was glad they took the time to change all four.

My carry-on bag was taken from me when I boarded. It was checked through to London at no charge. It took a big of shuffling, but I was glad not to need to mind it until baggage claim.

Great to have power available for every seat in Premium Economy. I do wish the WiFi was less expensive. It was 23-24 Euros for the flight for one device. And there were times it was unavailable.

Awful. The flight wasn't actually operated by Iberia, but by American Airlines. I was unable to get my boarding pass and as a result missed my connecting flight.

The seats were way too crowded. Just because I do not have the luxury of a suite, does not mean that I want to fly from Austin to London scrunched between two people and the seat in front of me in my face. Ridiculous. I should have flown with Turkish Airlines...

Very good service from San Jose to Madrid . Ryanair service from Madrid to Brussels 😕

Paid for “extra room” selected seat. Wasn’t a benefit. Also was in aisle and was bumped almost every time attendants walked down aisle. Should have saved the assigned seat money and let them select.

Flight from Madrid to Dakar had no onboard entertainment for a business class. Not even a single screen . That was disappointing. The WiFi only worked for the first 45 mins of the flight.

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

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