£203 Find Cheap Flights from Puerto Rico to the United Kingdom

1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to the United Kingdom

Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 27% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Useful Info
Useful Info

KAYAK's insights & trends for flights to the United Kingdom

Get data-powered insights and trends for flights to the United Kingdom to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Puerto Rico to the United Kingdom?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Puerto Rico to the United Kingdom, 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 Puerto Rico to the United Kingdom is October, when tickets cost £451 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of round-trip tickets is £1,080 and £1,017 respectively.

How far in advance should I book a flight from Puerto Rico to the United Kingdom?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to the United Kingdom, 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 Puerto Rico to the United Kingdom, 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 - Cheap tickets from Puerto Rico to the United Kingdom

Low seasonMarch
High seasonJuly
Cheapest flight£203
Best time to beat the crowds (19% less expensive on average)
Most popular time to fly (16% more expensive on average)
Flight from San Juan to London Gatwick Airport

FAQs for booking flights from Puerto Rico to the United Kingdom

  • How does KAYAK find such low prices on flights from Puerto Rico to the United Kingdom?

    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 Puerto Rico to the United Kingdom.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Puerto Rico to the United Kingdom?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Puerto Rico to the United Kingdom 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 Puerto Rico to the United Kingdom?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from Puerto Rico to the United Kingdom with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Puerto Rico to the United Kingdom?

    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 from Puerto Rico to the United Kingdom up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest day to fly to the United Kingdom?

    Based on KAYAK data, the cheapest day to fly to the United Kingdom is Tuesday when return tickets can be as cheap as £464. On the other hand, the most expensive day to fly is Saturday, when return prices are £1,134 on average.

  • What is the cheapest time of day to fly to the United Kingdom?

    The cheapest time of day to fly to the United Kingdom is generally in the evening, when round-trip flights cost £661 on average. Morning departures are around 73% more expensive than evening flights, on average. The most expensive time of day to fly to the United Kingdom is generally in the morning, which is peak travel time and where the average cost of a ticket is £1,144.

Top airline flying from Puerto Rico to the United Kingdom

 
Need help choosing which airline to fly with from Puerto Rico to the United Kingdom? 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.
7.0
IcelandairOverall score based on 499 reviews
7.0Comfort
7.0Entertainment
7.1Boarding
8.0Crew
6.2Food
Airline reviews

Seats in premier saga class were narrow and hard. Very uncomfortable for a 5-hour flight.

4.0 OkaySamuel, Jun 2025BWI - KEF
Read more Icelandair reviews

Seats in premier saga class were narrow and hard. Very uncomfortable for a 5-hour flight.

Iceland airlines doesn't provide any meal on flight to and from New York, except water and soda. Airline over charge for checking in luggage. I'm really upset.

Iceland airlines doesn't provide any meal on flight to and from New York, except water and soda. Airline over charge for checking in luggage. I'm really upset. If there is option to use another company, I suggest to other people use them.

I had an exit row and so was Comfortable on the long flight.

The seats on this airline are sooo small, even for a petite person. I felt like the seat tilted forward and I was fighting to stay in it. The lavatory is horribly small, with a wet floor because the sink is so small you can't help but splash the water all over when washing up.

For an economy lite experience, it's by far the best I've had. New planes, clean, great destinations. Very happy to have discovered Iceland Air.

Smooth efficient airline. Think they should have their own bag drop as the queue took 30mins to bmscan and drop

Good. Lacking overhead bin space. No food offered but you can order online or in flight and pay for snacks.

No food was served for 7.5 hrs flight. When our flight changed to other airlines due to wether issue, our seats booked with no checked in luggage when I already payed for. We end up to pay 90 euro per suitcase.

Only serving 2 small coffee in 7.5 hrs flight with very limited choice to order food.

Book cheap flights from Puerto Rico to the United Kingdom

Cheapest flights to the United Kingdom from Puerto Rico found in 2025

Recent return flight deals

13/8Wed
1 stopJetBlue
16h 00mSJU-LGW
27/8Wed
1 stopJetBlue
18h 21mLGW-SJU
£469
28/10Tue
1 stopJetBlue
15h 46mSJU-LHR
6/11Thu
1 stopJetBlue
19h 35mLHR-SJU
£479
29/10Wed
1 stopUnited Airlines
13h 35mSJU-EDI
7/11Fri
1 stopUnited Airlines
13h 52mEDI-SJU
£485
29/10Wed
1 stopUnited Airlines
13h 35mSJU-EDI
7/11Fri
2 stopsUnited Airlines
16h 57mEDI-SJU
£488
20/8Wed
1 stopAmerican Airlines
15h 40mSJU-LHR
26/8Tue
1 stopAmerican Airlines
12h 20mLHR-SJU
£491
2/9Tue
1 stopIberia
14h 49mSJU-LHR
9/9Tue
1 stopIberia
12h 40mLHR-SJU
£491
25/8Mon
1 stopIberia
15h 59mSJU-LHR
8/9Mon
1 stopIberia
24h 05mLHR-SJU
£495
9/11Sun
2 stopsAmerican Airlines
21h 35mSJU-LGW
20/11Thu
2 stopsAmerican Airlines
18h 50mLGW-SJU
£496
29/10Wed
2 stopsIcelandair
16h 55mSJU-LGW
6/11Thu
2 stopsIcelandair
19h 22mLGW-SJU
£737
7/8Thu
2 stopsIcelandair
21h 05mSJU-LGW
29/1Thu
2 stopsIcelandair
19h 22mLGW-SJU
£804

Search by stops

Search by airline

Search by price

Recent one-way flight deals

2/10Thu
1 stop
25h 20mSJU-LGW
£203
2/10Thu
2 stops
27h 49mSJU-LGW
£213
23/8Sat
1 stopJetBlue
17h 30mSJU-LHR
£251
23/8Sat
1 stopJetBlue
16h 00mSJU-LGW
£251
17/10Fri
2 stopsAvianca
20h 25mSJU-LHR
£284
31/10Fri
2 stopsAvianca
20h 25mSJU-LHR
£288
18/8Mon
2 stopsIberia
25h 04mSJU-EDI
£313
4/7Fri
1 stopIberia
14h 50mSJU-LHR
£403
23/8Sat
2 stopsIcelandair
27h 35mSJU-LGW
£593
27/11Thu
2 stopsIcelandair
33h 15mSJU-LHR
£1,410

Search by stops

Search by airline

Search by price

Last minute flights to the United Kingdom

Last minute flight, train and bus deals

18/6Wed
multi-stop
33h 15mSJU-LGW
1/7Tue
multi-stop
16h 04mLGW-SJU
£717
17/6Tue
multi-stop
25h 49mSJU-LGW
1/7Tue
multi-stop
16h 04mLGW-SJU
£861
18/6Wed
multi-stopJetBlue
19h 15mSJU-LHR
1/7Tue
multi-stopJetBlue
16h 50mLHR-SJU
£888
18/6Wed
multi-stopJetBlue
19h 15mSJU-LHR
1/7Tue
multi-stopJetBlue
16h 50mLHR-SJU
£905
17/6Tue
multi-stopAvianca
16h 20mSJU-LHR
8/7Tue
multi-stopAvianca
23h 45mLHR-SJU
£1,110
17/6Tue
multi-stopAvianca
21h 20mSJU-LHR
8/7Tue
multi-stopAvianca
23h 45mLHR-SJU
£1,235
20/6Fri
multi-stopAir Canada
14h 35mSJU-LHR
25/6Wed
multi-stopAir Canada
19h 27mLHR-SJU
£1,485
17/6Tue
multi-stopUnited Airlines
14h 35mSJU-LHR
1/7Tue
multi-stopUnited Airlines
22h 24mLHR-SJU
£1,495
16/6Mon
multi-stopUnited Airlines
14h 35mSJU-LHR
8/7Tue
multi-stopUnited Airlines
16h 47mLHR-SJU
£1,498
17/6Tue
multi-stopAir Canada
38h 55mSJU-LHR
1/7Tue
multi-stopAir Canada
26h 52mLHR-SJU
£1,505

Search by stops

Search by airline

Search by price

Everything you need to know for your flight to the United Kingdom

Cabin class types available on flights to the United Kingdom

Cabin classes available on flights to the United Kingdom. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Not what you’re looking for? Find thousands of other hotels, flights, car hires and package deals with KAYAK.