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Cheap flights from London to San Juan from £281

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 4/3. 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
08:05 - 19:53
LHR
-
SJU
15h 48m
1 stop
JetBlue Logo
06:10 - 06:55
SJU
-
LHR
20h 45m
1 stop
£395JetBlue
Sat, 28 Feb - Sun, 1 Mar
JetBlue Logo
12:20 - 02:28
LHR
-
SJU
18h 08m
1 stop
JetBlue Logo
14:25 - 06:55
SJU
-
LHR
12h 30m
1 stop
£402JetBlue
Fri, 20 Feb - Sat, 7 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
£411JetBlue
Tue, 24 Feb - Wed, 11 Mar
JetBlue Logo
12:20 - 00:29
LHR
-
SJU
16h 09m
1 stop
JetBlue Logo
04:15 - 21:40
SJU
-
LHR
13h 25m
1 stop
£411JetBlue
Tue, 3 Mar - Tue, 10 Mar
JetBlue Logo
08:05 - 00:29
LHR
-
SJU
20h 24m
1 stop
JetBlue Logo
02:30 - 06:55
SJU
-
LHR
24h 25m
1 stop
£438JetBlue
Fri, 6 Mar - Sun, 15 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
£443Multiple Airlines
Fri, 27 Feb - Mon, 9 Mar
Multiple Airlines Logo
11:55 - 01:08
LGW
-
SJU
17h 13m
2 stops
Multiple Airlines Logo
14:30 - 10:55
SJU
-
LGW
16h 25m
2 stops
£449Multiple Airlines
Tue, 3 Mar - Tue, 10 Mar
JetBlue Logo
12:20 - 02:28
LHR
-
SJU
18h 08m
1 stop
JetBlue Logo
12:10 - 06:55
SJU
-
LHR
14h 45m
1 stop
£449JetBlue
Fri, 20 Feb - Sat, 7 Mar
JetBlue Logo
12:20 - 00:29
LHR
-
SJU
16h 09m
1 stop
JetBlue Logo
06:01 - 09:30
SJU
-
LHR
23h 29m
1 stop
£451JetBlue
Fri, 6 Mar - Sun, 15 Mar
JetBlue Logo
09:20 - 23:49
LHR
-
SJU
18h 29m
1 stop
JetBlue Logo
05:10 - 06:55
SJU
-
LHR
21h 45m
1 stop
£452JetBlue
Fri, 6 Mar - Sun, 15 Mar

British Airways flights from London to San Juan Luis Munoz Marin Intl Airport

Our best British Airways deals on London to San Juan Luis Munoz Marin Intl Airport flight tickets
British Airways
26 Feb
LCY06:50London City
20h 50m
2 stops
SJU23:40San Juan Luis Munoz Marin Intl
2 Mar
SJU06:00San Juan Luis Munoz Marin Intl
32h 35m
2 stops
LCY18:35London City
£943
British Airways
26 Feb
LCY06:50London City
20h 50m
2 stops
SJU23:40San Juan Luis Munoz Marin Intl
2 Mar
SJU06:00San Juan Luis Munoz Marin Intl
35h 30m
2 stops
LCY21:30London City
£943
British Airways
26 Feb
LCY07:50London City
16h 05m
1 stop
SJU19:55San Juan Luis Munoz Marin Intl
2 Mar
SJU06:00San Juan Luis Munoz Marin Intl
26h 40m
2 stops
LCY12:40London City
£954

JetBlue flights from London to San Juan Luis Munoz Marin Intl Airport

Our best JetBlue deals on London to San Juan Luis Munoz Marin Intl Airport flight tickets
JetBlue
28 Feb
LHR08:05London Heathrow
15h 48m
1 stop
SJU19:53San Juan Luis Munoz Marin Intl
1 Mar
SJU06:10San Juan Luis Munoz Marin Intl
20h 45m
1 stop
LHR06:55London Heathrow
£395
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
£402
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
£411

momondo Fare Finder

 
Customise your flight search to find flights from London to San Juan Luis Munoz Marin Intl Airport 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 4 February 2026.
Use the filters below to find and compare flights from London to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 28/2

08:05-19:53

1 stop15h 48m

San Juan Luis Munoz Marin Intl

Sun 1/3

06:10-06:55

1 stop20h 45m

£395

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

£402

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

£411

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 3/3

12:20-00:29

1 stop16h 09m

San Juan Luis Munoz Marin Intl

Tue 10/3

04:15-21:40

1 stop13h 25m

£411

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 6/3

08:05-00:29

1 stop20h 24m

San Juan Luis Munoz Marin Intl

Sun 15/3

02:30-06:55

1 stop24h 25m

£438

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

£443

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 3/3

11:55-01:08

2 stops17h 13m

San Juan Luis Munoz Marin Intl

Tue 10/3

14:30-10:55

2 stops16h 25m

£449

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

12:10-06:55

1 stop14h 45m

£449

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 6/3

12:20-00:29

1 stop16h 09m

San Juan Luis Munoz Marin Intl

Sun 15/3

06:01-09:30

1 stop23h 29m

£451

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 6/3

09:20-23:49

1 stop18h 29m

San Juan Luis Munoz Marin Intl

Sun 15/3

05:10-06:55

1 stop21h 45m

£452

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 Luis Munoz Marin Intl Airport

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 Luis Munoz Marin Intl Airport?

What is the cheapest month to fly to San Juan Luis Munoz Marin Intl Airport?

If you aren’t able to travel during the month of September, then book flights to San Juan Luis Munoz Marin Intl Airport from London during February instead. Flights to San Juan Luis Munoz Marin Intl Airport in February, while not as cheap as those in September, still average around £537.

How far in advance should I book a flight to San Juan Luis Munoz Marin Intl Airport?

You are more likely to see cheaper flights to San Juan Luis Munoz Marin Intl Airport from London when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan Luis Munoz Marin Intl Airport for around £640 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 Luis Munoz Marin Intl Airport from London for as low as £512 on momondo.

How have London to San Juan Luis Munoz Marin Intl Airport flight prices changed over time?

As of February 2026, prices for London to San Juan Luis Munoz Marin Intl Airport flights are approximately 26% cheaper when compared to flights at the same time last year.

When to book flights from London to San Juan Luis Munoz Marin Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from London to San Juan Luis Munoz Marin Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London to San Juan Luis Munoz Marin Intl Airport (LON to SJU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to San Juan Luis Munoz Marin Intl Airport

Fastest flight time

12h 50m

Direct flights

None
The fastest flight from London to San Juan Luis Munoz Marin Intl Airport takes 12h 50m
There are no direct flights from London to San Juan Luis Munoz Marin Intl Airport. There are no popular flight routes from London to San Juan Luis Munoz Marin Intl Airport.
Search flight deals

  • How far is London to San Juan Luis Munoz Marin Intl by plane?

    The straight-line distance from London to San Juan Luis Munoz Marin Intl is 4193.3 mi. By plane, this route typically takes 12h 50m.

  • When did momondo last update prices for flights from London to San Juan Luis Munoz Marin Intl Airport?

    Prices for flights from London to San Juan Luis Munoz Marin Intl Airport are updated daily.

  • How many operators does momondo search for flights from London to San Juan Luis Munoz Marin Intl Airport?

  • How old do you have to be to fly from London to San Juan Luis Munoz Marin Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London to San Juan Luis Munoz Marin Intl Airport.

  • What documentation or ID do you need to fly to San Juan Luis Munoz Marin Intl Airport?

    The travel and health documents you'll need for your trip to San Juan Luis Munoz Marin Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Juan Luis Munoz Marin Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from London to San Juan Luis Munoz Marin Intl Airport?

Best airlines flying from London to San Juan Luis Munoz Marin Intl Airport

Compare and see reviews for airlines that fly from London to San Juan Luis Munoz Marin Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Virgin AtlanticPriceFrom £337Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £422Free CancellationRating
7.2
2,893 reviews
Search JetBlue flights
FinnairPriceFrom £423Free CancellationRating
7.6
1,357 reviews
Search Finnair flights
IcelandairPriceFrom £495Free CancellationRating
7.1
606 reviews
Search Icelandair flights
British AirwaysPriceFrom £528Free CancellationRating
6.7
7,712 reviews
Search British Airways flights
IberiaPriceFrom £543Free CancellationRating
7.0
3,103 reviews
Search Iberia flights

Travelling to a place near San Juan?

Book flights to San Juan if you plan to visit one of these locations
Rio Grande
Carolina
Fajardo
Dorado

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to San Juan for you.

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

Yes. momondo allows you to filter the results for London to San Juan flights to just show those with flexible booking policies.

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

Once you have performed a search for London to San Juan flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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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