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Cheap flights from London to San Juan from £302

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to San Juan departing on 27/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from London to San Juan

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
14:00 - 09:35LGW  London Gatwick-SJU San Juan Luis Munoz Marin Intl
24h 35m1 stop Orlando
Multiple Airlines Logo
18:42 - 10:00SJU  San Juan Luis Munoz Marin Intl-LGW London Gatwick
34h 18m1 stop Orlando
£541Multiple Airlines
Sun, 27 Sep - Sun, 4 Oct
Multiple Airlines Logo
14:00 - 23:13LGW  London Gatwick-SJU San Juan Luis Munoz Marin Intl
14h 13m1 stop Orlando
Multiple Airlines Logo
10:42 - 10:00SJU  San Juan Luis Munoz Marin Intl-LGW London Gatwick
18h 18m1 stop Orlando
£551Multiple Airlines
Mon, 21 Sep - Sun, 27 Sep
JetBlue Logo
08:15 - 19:33LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
16h 18m1 stop New York John F Kennedy Intl
JetBlue Logo
06:00 - 09:30SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
22h 30m1 stop New York John F Kennedy Intl
£590JetBlue
Wed, 7 Oct - Sun, 11 Oct
JetBlue Logo
07:25 - 12:23LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
32h 58m1 stop New York John F Kennedy Intl
JetBlue Logo
16:00 - 20:45SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
24h 45m1 stop New York John F Kennedy Intl
£590JetBlue
Fri, 6 Nov - Tue, 10 Nov
Iberia Logo
09:15 - 20:00LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
14h 45m1 stop Madrid Barajas
Iberia Logo
21:35 - 16:35SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
15h 00m1 stop Madrid Barajas
£677Iberia
Mon, 18 Jan - Tue, 26 Jan
Iberia Logo
09:15 - 20:00LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
14h 45m1 stop Madrid Barajas
Iberia Logo
21:35 - 16:35SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
15h 00m1 stop Madrid Barajas
£717Iberia
Fri, 15 Jan - Mon, 25 Jan
Icelandair Logo
20:35 - 02:25LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
33h 50m2 stops Reykjavik Keflavik Intl New York John F Kennedy Intl
Icelandair Logo
11:06 - 19:30SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
28h 24m2 stops New York John F Kennedy Intl Reykjavik Keflavik Intl
£727Icelandair
Mon, 18 Jan - Tue, 26 Jan
Icelandair Logo
20:35 - 10:02LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
41h 27m2 stops Reykjavik Keflavik Intl Boston Logan Intl
Icelandair Logo
13:59 - 19:30SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
25h 31m2 stops New York John F Kennedy Intl Reykjavik Keflavik Intl
£731Icelandair
Sat, 5 Dec - Fri, 11 Dec
British Airways Logo
07:40 - 16:40LCY  London City-SJU San Juan Luis Munoz Marin Intl
13h 00m1 stop Madrid Barajas
British Airways Logo
10:32 - 08:50SJU  San Juan Luis Munoz Marin Intl-LCY London City
18h 18m2 stops Miami Madrid Barajas
£963British Airways
Thu, 19 Nov - Mon, 30 Nov
British Airways Logo
07:40 - 16:40LCY  London City-SJU San Juan Luis Munoz Marin Intl
13h 00m1 stop Madrid Barajas
British Airways Logo
21:35 - 14:15SJU  San Juan Luis Munoz Marin Intl-LCY London City
12h 40m1 stop Madrid Barajas
£963British Airways
Thu, 19 Nov - Mon, 30 Nov

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JetBlue flights from London to San Juan

Our best JetBlue deals on London to San Juan flight tickets
JetBlue
7 Oct
LHR08:15London Heathrow
16h 18m
1 stop
SJU19:33San Juan Luis Munoz Marin Intl
11 Oct
SJU06:00San Juan Luis Munoz Marin Intl
22h 30m
1 stop
LHR09:30London Heathrow
£590
JetBlue
11 Sept
LHR11:55London Heathrow
33h 17m
1 stop
SJU16:12San Juan Luis Munoz Marin Intl
19 Sept
SJU10:30San Juan Luis Munoz Marin Intl
29h 15m
1 stop
LHR20:45London Heathrow
£591
JetBlue
26 Sept
LHR08:40London Heathrow
32h 22m
1 stop
SJU12:02San Juan Luis Munoz Marin Intl
9 Oct
SJU06:12San Juan Luis Munoz Marin Intl
19h 18m
1 stop
LHR06:30London Heathrow
£592

Iberia flights from London to San Juan

Our best Iberia deals on London to San Juan flight tickets
Iberia
18 Jan
LHR09:15London Heathrow
14h 45m
1 stop
SJU20:00San Juan Luis Munoz Marin Intl
26 Jan
SJU21:35San Juan Luis Munoz Marin Intl
15h 00m
1 stop
LHR16:35London Heathrow
£677
Iberia
15 Jan
LGW19:40London Gatwick
25h 00m
1 stop
SJU16:40San Juan Luis Munoz Marin Intl
18 Jan
SJU18:10San Juan Luis Munoz Marin Intl
12h 40m
1 stop
LGW10:50London Gatwick
£705
Iberia
15 Jan
LCY07:50London City
12h 50m
1 stop
SJU16:40San Juan Luis Munoz Marin Intl
18 Jan
SJU21:35San Juan Luis Munoz Marin Intl
12h 40m
1 stop
LCY14:15London City
£1,060

momondo Fare Finder

 
Customise your flight search to find flights from London to San Juan that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 17 August 2026.
Use the filters below to find and compare flights from London to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSan Juan

LGW London Gatwick - SJU San Juan Luis Munoz Marin Intl

LGWSJU

London Gatwick

Sun 27/9

14:00-09:35

1 stop24h 35m

San Juan Luis Munoz Marin Intl

Sun 4/10

18:42-10:00

1 stop34h 18m

£541

LondonSan Juan

LGW London Gatwick - SJU San Juan Luis Munoz Marin Intl

LGWSJU

London Gatwick

Mon 21/9

14:00-23:13

1 stop14h 13m

San Juan Luis Munoz Marin Intl

Sun 27/9

10:42-10:00

1 stop18h 18m

£551

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Wed 7/10

08:15-19:33

1 stop16h 18m

San Juan Luis Munoz Marin Intl

Sun 11/10

06:00-09:30

1 stop22h 30m

£590

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Fri 6/11

07:25-12:23

1 stop32h 58m

San Juan Luis Munoz Marin Intl

Tue 10/11

16:00-20:45

1 stop24h 45m

£590

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Mon 18/1

09:15-20:00

1 stop14h 45m

San Juan Luis Munoz Marin Intl

Tue 26/1

21:35-16:35

1 stop15h 00m

£677

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Fri 15/1

09:15-20:00

1 stop14h 45m

San Juan Luis Munoz Marin Intl

Mon 25/1

21:35-16:35

1 stop15h 00m

£717

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Mon 18/1

20:35-02:25

2 stops33h 50m

San Juan Luis Munoz Marin Intl

Tue 26/1

11:06-19:30

2 stops28h 24m

£727

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Sat 5/12

20:35-10:02

2 stops41h 27m

San Juan Luis Munoz Marin Intl

Fri 11/12

13:59-19:30

2 stops25h 31m

£731

LondonSan Juan

LCY London City - SJU San Juan Luis Munoz Marin Intl

LCYSJU

London City

Thu 19/11

07:40-16:40

1 stop13h 00m

San Juan Luis Munoz Marin Intl

Mon 30/11

10:32-08:50

2 stops18h 18m

£963
Fastest return journey

LondonSan Juan

LCY London City - SJU San Juan Luis Munoz Marin Intl

LCYSJU

London City

Thu 19/11

07:40-16:40

1 stop13h 00m

San Juan Luis Munoz Marin Intl

Mon 30/11

21:35-14:15

1 stop12h 40m

£963

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Juan from

How to get the cheapest flight ticket from London to San Juan

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between London and San Juan?

Prices are currently low for flights on this route.

Typical prices usually range from £705 to £889.
The lowest price recently found on this route was £541.

What is the cheapest month to fly to San Juan?

The cheapest month to fly to San Juan from London is in February. Flight prices, which tend to average around £532, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to San Juan from London during May instead. Flights to San Juan in May, while not as cheap as those in February, still average around £608.

How far in advance should I book a flight from London to San Juan?

You are more likely to see cheaper flights to San Juan from London when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan for around £727 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan from London for as low as £553 on momondo.

Cheap London to San Juan flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to San Juan

Best price found

£302

Fastest flight time

14h 07m

Direct flights

None
The best one-way flight to San Juan from London in the past 72 hours is £302. The best return flight deal from London to San Juan found on momondo in the last 72 hours is £541.
The fastest flight from London to San Juan takes 14h 07m
There are no direct flights from London to San Juan. There are no popular flight routes from London to San Juan.
Search flight deals

Frequently asked questions about flying from London to San Juan

  • How far is London to San Juan by plane?

    A flight from London to San Juan will travel around 4196.4 mi. Flights usually cover this in 14h 07m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from London to San Juan?

    Prices for flights from London to San Juan are refreshed on a daily basis.

  • How many operators does momondo search for flights from London to San Juan?

  • How old do you have to be to fly from London to San Juan?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to San Juan.

  • What documentation or ID do you need to fly to San Juan?

    The necessary travel and health documents for your San Juan trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from London to San Juan

Compare and see reviews for airlines that fly from London to San Juan with momondo
Airline
Rating
Free Cancellation
Price
Virgin AtlanticPriceFrom £330Free CancellationRating
7.5
692 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £420Free CancellationRating
7.1
3,031 reviews
Search JetBlue flights
IcelandairPriceFrom £481Free CancellationRating
6.9
731 reviews
Search Icelandair flights
IberiaPriceFrom £766Free CancellationRating
7.0
3,255 reviews
Search Iberia flights
British AirwaysPriceFrom £837Free CancellationRating
6.7
8,170 reviews
Search British Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from London to San Juan?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Juan from London.

Can I find flights from London to San Juan with flexible booking policies on momondo?

Yes. All flights to San Juan from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from London to San Juan?

Once all potential London to San Juan flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from London to San Juan right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to San Juan from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your San Juan trip

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Find better results for your trip to Puerto Rico

Fly into one of these airports located in San Juan

Airports listed have a maximum distance of 7.1 mi from San Juan
San Juan Luis Munoz Marin Intl Airport