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Cheap flights from London to San Juan from £253

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 26/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
12:20 - 02:28
LHR
-
SJU
18h 08m
1 stop
JetBlue Logo
14:25 - 06:55
SJU
-
LHR
12h 30m
1 stop
£405JetBlue
Fri, 20 Feb - Sat, 7 Mar
JetBlue Logo
12:20 - 02:54
LHR
-
SJU
18h 34m
1 stop
JetBlue Logo
03:26 - 21:40
SJU
-
LHR
14h 14m
1 stop
£411JetBlue
Wed, 11 Mar - Tue, 17 Mar
JetBlue Logo
12:20 - 00:29
LHR
-
SJU
16h 09m
1 stop
JetBlue Logo
13:25 - 06:55
SJU
-
LHR
13h 30m
1 stop
£414JetBlue
Tue, 24 Feb - Wed, 11 Mar
JetBlue Logo
12:20 - 22:31
LHR
-
SJU
14h 11m
1 stop
JetBlue Logo
14:25 - 09:30
SJU
-
LHR
15h 05m
1 stop
£414JetBlue
Tue, 24 Feb - Wed, 11 Mar
JetBlue Logo
12:20 - 02:54
LHR
-
SJU
18h 34m
1 stop
JetBlue Logo
02:30 - 06:55
SJU
-
LHR
24h 25m
1 stop
£421JetBlue
Sun, 8 Mar - Sat, 14 Mar
JetBlue Logo
09:20 - 00:58
LHR
-
SJU
19h 38m
1 stop
JetBlue Logo
06:05 - 06:55
SJU
-
LHR
20h 50m
1 stop
£424JetBlue
Sat, 28 Feb - Sat, 7 Mar
Multiple Airlines Logo
20:35 - 01:08
LHR
-
SJU
32h 33m
2 stops
Multiple Airlines Logo
14:30 - 19:30
SJU
-
LHR
25h 00m
2 stops
£446Multiple Airlines
Fri, 27 Feb - Mon, 9 Mar
British Airways Logo
06:50 - 23:40
LCY
-
SJU
20h 50m
2 stops
British Airways Logo
06:00 - 21:30
SJU
-
LCY
35h 30m
2 stops
£943British Airways
Thu, 26 Feb - Mon, 2 Mar
British Airways Logo
06:50 - 23:40
LCY
-
SJU
20h 50m
2 stops
British Airways Logo
06:00 - 18:35
SJU
-
LCY
32h 35m
2 stops
£950British Airways
Thu, 26 Feb - Mon, 2 Mar
British Airways Logo
06:50 - 23:40
LCY
-
SJU
20h 50m
2 stops
British Airways Logo
06:00 - 18:35
SJU
-
LCY
32h 35m
2 stops
£950British Airways
Thu, 26 Feb - Mon, 2 Mar

Lufthansa flights from London to San Juan

Our best Lufthansa deals on London to San Juan flight tickets
Lufthansa
23 Mar
LCY18:15London City
33h 21m
2 stops
SJU23:36San Juan Luis Munoz Marin Intl
7 Apr
SJU07:00San Juan Luis Munoz Marin Intl
29h 55m
2 stops
LCY17:55London City
£1,036
Lufthansa
24 Feb
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
£1,094
Lufthansa
17 Feb
LCY09:50London City
18h 46m
2 stops
SJU00:36San Juan Luis Munoz Marin Intl
23 Feb
SJU14:10San Juan Luis Munoz Marin Intl
23h 30m
2 stops
LCY17:40London City
£1,565

JetBlue flights from London to San Juan

Our best JetBlue deals on London to San Juan flight tickets
JetBlue
20 Feb
LHR12:20London Heathrow
18h 08m
1 stop
SJU02:28San Juan Luis Munoz Marin Intl
7 Mar
SJU14:25San Juan Luis Munoz Marin Intl
12h 30m
1 stop
LHR06:55London Heathrow
£405
JetBlue
11 Mar
LHR12:20London Heathrow
18h 34m
1 stop
SJU02:54San Juan Luis Munoz Marin Intl
17 Mar
SJU03:26San Juan Luis Munoz Marin Intl
14h 14m
1 stop
LHR21:40London Heathrow
£411
JetBlue
24 Feb
LHR12:20London Heathrow
16h 09m
1 stop
SJU00:29San Juan Luis Munoz Marin Intl
11 Mar
SJU13:25San Juan Luis Munoz Marin Intl
13h 30m
1 stop
LHR06:55London Heathrow
£414

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 7 February 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

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 20/2

12:20-02:28

1 stop18h 08m

San Juan Luis Munoz Marin Intl

Sat 7/3

14:25-06:55

1 stop12h 30m

£405

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 11/3

12:20-02:54

1 stop18h 34m

San Juan Luis Munoz Marin Intl

Tue 17/3

03:26-21:40

1 stop14h 14m

£411

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 24/2

12:20-00:29

1 stop16h 09m

San Juan Luis Munoz Marin Intl

Wed 11/3

13:25-06:55

1 stop13h 30m

£414

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 24/2

12:20-22:31

1 stop14h 11m

San Juan Luis Munoz Marin Intl

Wed 11/3

14:25-09:30

1 stop15h 05m

£414

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sun 8/3

12:20-02:54

1 stop18h 34m

San Juan Luis Munoz Marin Intl

Sat 14/3

02:30-06:55

1 stop24h 25m

£421

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 28/2

09:20-00:58

1 stop19h 38m

San Juan Luis Munoz Marin Intl

Sat 7/3

06:05-06:55

1 stop20h 50m

£424

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 27/2

20:35-01:08

2 stops32h 33m

San Juan Luis Munoz Marin Intl

Mon 9/3

14:30-19:30

2 stops25h 00m

£446

LondonSan Juan

LCY - SJU

LCYSJU

London City

Thu 26/2

06:50-23:40

2 stops20h 50m

San Juan Luis Munoz Marin Intl

Mon 2/3

06:00-21:30

2 stops35h 30m

£943

LondonSan Juan

LCY - SJU

LCYSJU

London City

Thu 26/2

06:50-23:40

2 stops20h 50m

San Juan Luis Munoz Marin Intl

Mon 2/3

06:00-18:35

2 stops32h 35m

£950

LondonSan Juan

LCY - SJU

LCYSJU

London City

Thu 26/2

06:50-23:40

2 stops20h 50m

San Juan Luis Munoz Marin Intl

Mon 2/3

06:00-18:35

2 stops32h 35m

£950

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 £531, 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 £541.

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 £644 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 £516 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 05m

Direct flights

None
The fastest flight from London to San Juan takes 13h 05m
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 13h 05m, 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 £340Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £425Free CancellationRating
7.2
2,898 reviews
Search JetBlue flights
FinnairPriceFrom £426Free CancellationRating
7.6
1,357 reviews
Search Finnair flights
IcelandairPriceFrom £499Free CancellationRating
7.1
606 reviews
Search Icelandair flights
British AirwaysPriceFrom £532Free CancellationRating
6.7
7,719 reviews
Search British Airways flights
IberiaPriceFrom £547Free CancellationRating
7.0
3,106 reviews
Search Iberia 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