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Cheap flights from London to San Juan from £272

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 27/2. 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
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.
JetBlue Logo
09:20 - 22:55
LHR
-
SJU
17h 35m1 stop
JetBlue Logo
11:15 - 09:30
SJU
-
LHR
18h 15m1 stop
£546JetBlue
Sat, 31 Jan - Tue, 10 Feb
Multiple Airlines Logo
19:40 - 11:35
LGW
-
SJU
19h 55m2 stops
Multiple Airlines Logo
08:40 - 06:00
SJU
-
LGW
17h 20m1 stop
£548Multiple Airlines
Wed, 11 Feb - Tue, 17 Feb
Multiple Airlines Logo
14:00 - 09:47
LGW
-
SJU
23h 47m1 stop
Multiple Airlines Logo
07:10 - 20:40
SJU
-
LGW
33h 30m2 stops
£550Multiple Airlines
Fri, 6 Feb - Sat, 14 Feb
JetBlue Logo
09:20 - 21:56
LHR
-
SJU
16h 36m1 stop
JetBlue Logo
04:15 - 21:40
SJU
-
LHR
13h 25m1 stop
£550JetBlue
Fri, 6 Mar - Wed, 11 Mar
Multiple Airlines Logo
15:00 - 11:35
STN
-
SJU
24h 35m2 stops
Multiple Airlines Logo
10:52 - 22:35
SJU
-
STN
31h 43m3 stops
£551Multiple Airlines
Fri, 23 Jan - Sun, 1 Feb
Avianca Logo
21:40 - 17:05
LHR
-
SJU
23h 25m1 stop
Avianca Logo
18:30 - 14:35
SJU
-
LHR
16h 05m1 stop
£574Avianca
Thu, 5 Mar - Fri, 13 Mar
Lufthansa Logo
09:50 - 00:36
LCY
-
SJU
18h 46m2 stops
Lufthansa Logo
07:45 - 17:40
SJU
-
LCY
29h 55m2 stops
£893Lufthansa
Mon, 26 Jan - Thu, 5 Feb
Lufthansa Logo
09:50 - 00:36
LCY
-
SJU
18h 46m2 stops
Lufthansa Logo
07:45 - 17:40
SJU
-
LCY
29h 55m2 stops
£894Lufthansa
Mon, 26 Jan - Thu, 5 Feb
Iberia Logo
09:10 - 19:55
LCY
-
SJU
14h 45m1 stop
Iberia Logo
21:25 - 08:50
SJU
-
LCY
31h 25m1 stop
£920Iberia
Mon, 26 Jan - Thu, 5 Feb
Iberia Logo
09:10 - 19:55
LCY
-
SJU
14h 45m1 stop
Iberia Logo
21:25 - 08:50
SJU
-
LCY
31h 25m1 stop
£920Iberia
Mon, 26 Jan - Thu, 5 Feb

Iberia flights from London to San Juan

Our best Iberia deals on London to San Juan flight tickets
Iberia
26 Jan
LCY09:10London City
14h 45m
1 stop
SJU19:55San Juan Luis Munoz Marin Intl
5 Feb
SJU21:25San Juan Luis Munoz Marin Intl
31h 25m
1 stop
LCY08:50London City
£920
Find similar
Iberia
26 Jan
LCY09:10London City
14h 45m
1 stop
SJU19:55San Juan Luis Munoz Marin Intl
5 Feb
SJU21:25San Juan Luis Munoz Marin Intl
31h 25m
1 stop
LCY08:50London City
£920
Find similar
Iberia
2 Feb
LCY19:15London City
25h 20m
1 stop
SJU16:35San Juan Luis Munoz Marin Intl
9 Feb
SJU21:25San Juan Luis Munoz Marin Intl
31h 25m
1 stop
LCY08:50London City
£927
Find similar

Lufthansa flights from London to San Juan

Our best Lufthansa deals on London to San Juan flight tickets
Lufthansa
26 Jan
LCY09:50London City
18h 46m
2 stops
SJU00:36San Juan Luis Munoz Marin Intl
5 Feb
SJU07:45San Juan Luis Munoz Marin Intl
29h 55m
2 stops
LCY17:40London City
£893
Find similar
Lufthansa
26 Jan
LCY09:50London City
18h 46m
2 stops
SJU00:36San Juan Luis Munoz Marin Intl
5 Feb
SJU07:45San Juan Luis Munoz Marin Intl
29h 55m
2 stops
LCY17:40London City
£929
Find similar
Lufthansa
3 Mar
LCY09:50London City
18h 46m
2 stops
SJU00:36San Juan Luis Munoz Marin Intl
11 Mar
SJU13:10San Juan Luis Munoz Marin Intl
24h 30m
2 stops
LCY17:40London City
£938
Find similar

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 10 December 2025.
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

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 31/1

09:20-22:55

1 stop17h 35m

San Juan Luis Munoz Marin Intl

Tue 10/2

11:15-09:30

1 stop18h 15m

£546

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Wed 11/2

19:40-11:35

2 stops19h 55m

San Juan Luis Munoz Marin Intl

Tue 17/2

08:40-06:00

1 stop17h 20m

£548

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Fri 6/2

14:00-09:47

1 stop23h 47m

San Juan Luis Munoz Marin Intl

Sat 14/2

07:10-20:40

2 stops33h 30m

£550

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 6/3

09:20-21:56

1 stop16h 36m

San Juan Luis Munoz Marin Intl

Wed 11/3

04:15-21:40

1 stop13h 25m

£550

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Fri 23/1

15:00-11:35

2 stops24h 35m

San Juan Luis Munoz Marin Intl

Sun 1/2

10:52-22:35

3 stops31h 43m

£551

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 5/3

21:40-17:05

1 stop23h 25m

San Juan Luis Munoz Marin Intl

Fri 13/3

18:30-14:35

1 stop16h 05m

£574

LondonSan Juan

LCY - SJU

LCYSJU

London City

Mon 26/1

09:50-00:36

2 stops18h 46m

San Juan Luis Munoz Marin Intl

Thu 5/2

07:45-17:40

2 stops29h 55m

£893

LondonSan Juan

LCY - SJU

LCYSJU

London City

Mon 26/1

09:50-00:36

2 stops18h 46m

San Juan Luis Munoz Marin Intl

Thu 5/2

07:45-17:40

2 stops29h 55m

£894

LondonSan Juan

LCY - SJU

LCYSJU

London City

Mon 26/1

09:10-19:55

1 stop14h 45m

San Juan Luis Munoz Marin Intl

Thu 5/2

21:25-08:50

1 stop31h 25m

£920

LondonSan Juan

LCY - SJU

LCYSJU

London City

Mon 26/1

09:10-19:55

1 stop14h 45m

San Juan Luis Munoz Marin Intl

Thu 5/2

21:25-08:50

1 stop31h 25m

£920

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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?

What is the cheapest month to fly to San Juan?

The cheapest month to fly to San Juan from London is in September. 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 September, then book flights to San Juan from London during February instead. Flights to San Juan in February, while not as cheap as those in September, still average around £567.

What is the cheapest day to depart on your flight to San Juan?

The cheapest day to depart on your flight to San Juan is on a Monday when prices can be found for as low as £534. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to San Juan is Saturday, with ticket prices averaging around £651.

What is the cheapest time of day to depart on your flight to San Juan?

In the morning is the cheapest time of day to fly from London to San Juan when you can find flight prices for as low as £590. Flying to San Juan in the morning is an ideal time because this is during off-peak travel hours. Flights in the afternoon are often more expensive, with an average ticket price of £844.

How far in advance should I book a flight 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 £652 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 £526 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

Fastest flight time

13h 20m

Direct flights

None
The fastest flight from London to San Juan takes 13h 20m
There are no direct flights from London to San Juan. There are no popular flight routes from London to San Juan.
Search flight deals

  • 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 12h 45m, 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 £335Free CancellationRating
7.5
675 reviews
Search Virgin Atlantic flights
FinnairPriceFrom £453Free CancellationRating
7.6
1,334 reviews
Search Finnair flights
JetBluePriceFrom £457Free CancellationRating
7.2
2,899 reviews
Search JetBlue flights
IcelandairPriceFrom £489Free CancellationRating
7.0
588 reviews
Search Icelandair flights
IberiaPriceFrom £504Free CancellationRating
7.0
3,043 reviews
Search Iberia flights
British AirwaysPriceFrom £543Free CancellationRating
6.7
7,573 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.

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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