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Cheap flights from London to San Juan from £314

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 31/8. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from London to San Juan

Cheap return flights

Enter your travel dates to find the best prices.
JetBlue Logo
07:25 - 20:45
LHR
-
SJU
17h 20m
1 stop
JetBlue Logo
02:05 - 21:15
SJU
-
LHR
15h 10m
1 stop
£491JetBlue
Wed, 18 Nov - Sat, 21 Nov
Multiple Airlines Logo
14:00 - 13:16
LGW
-
SJU
28h 16m
1 stop
Multiple Airlines Logo
18:42 - 10:00
SJU
-
LGW
34h 18m
1 stop
£512Multiple Airlines
Mon, 21 Sep - Sun, 4 Oct
Multiple Airlines Logo
14:00 - 01:50
LGW
-
SJU
16h 50m
1 stop
Multiple Airlines Logo
18:31 - 10:00
SJU
-
LGW
34h 29m
1 stop
£548Multiple Airlines
Fri, 11 Sep - Sun, 13 Sep
JetBlue Logo
11:55 - 13:39
LHR
-
SJU
30h 44m
1 stop
JetBlue Logo
06:00 - 20:45
SJU
-
LHR
33h 45m
1 stop
£556JetBlue
Tue, 22 Sep - Wed, 30 Sep
Icelandair Logo
13:05 - 10:00
LHR
-
SJU
25h 55m
2 stops
Icelandair Logo
06:00 - 11:55
SJU
-
LHR
24h 55m
2 stops
£815Icelandair
Sat, 5 Sep - Tue, 15 Sep
Icelandair Logo
13:05 - 10:00
LHR
-
SJU
25h 55m
2 stops
Icelandair Logo
06:00 - 11:55
SJU
-
LHR
24h 55m
2 stops
£862Icelandair
Sat, 5 Sep - Tue, 15 Sep
Iberia Logo
19:40 - 16:40
LHR
-
SJU
25h 00m
1 stop
Iberia Logo
14:31 - 08:15
SJU
-
LHR
13h 44m
1 stop
£944Iberia
Thu, 10 Dec - Sat, 19 Dec
Iberia Logo
10:45 - 20:00
LHR
-
SJU
13h 15m
1 stop
Iberia Logo
18:56 - 12:05
SJU
-
LHR
13h 09m
1 stop
£955Iberia
Thu, 10 Dec - Sat, 19 Dec
British Airways Logo
09:35 - 18:30
LCY
-
SJU
13h 55m
1 stop
British Airways Logo
14:22 - 12:10
SJU
-
LCY
16h 48m
2 stops
£1,005British Airways
Tue, 22 Sep - Wed, 30 Sep
British Airways Logo
07:50 - 16:40
LCY
-
SJU
12h 50m
1 stop
British Airways Logo
11:34 - 08:50
SJU
-
LCY
17h 16m
2 stops
£1,021British Airways
Wed, 18 Nov - Sun, 22 Nov

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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
18 Nov
LHR07:25London Heathrow
17h 20m
1 stop
SJU20:45San Juan Luis Munoz Marin Intl
21 Nov
SJU02:05San Juan Luis Munoz Marin Intl
15h 10m
1 stop
LHR21:15London Heathrow
£491
JetBlue
22 Sept
LHR11:55London Heathrow
30h 44m
1 stop
SJU13:39San Juan Luis Munoz Marin Intl
30 Sept
SJU06:00San Juan Luis Munoz Marin Intl
33h 45m
1 stop
LHR20:45London Heathrow
£556
JetBlue
1 Sept
LHR08:15London Heathrow
19h 44m
1 stop
SJU22:59San Juan Luis Munoz Marin Intl
8 Sept
SJU07:25San Juan Luis Munoz Marin Intl
21h 05m
1 stop
LHR09:30London Heathrow
£557

Aer Lingus flights from London to San Juan Luis Munoz Marin Intl Airport

Our best Aer Lingus deals on London to San Juan Luis Munoz Marin Intl Airport flight tickets
Aer Lingus
4 Dec
LCY06:50London City
19h 08m
2 stops
SJU21:58San Juan Luis Munoz Marin Intl
13 Dec
SJU06:01San Juan Luis Munoz Marin Intl
22h 34m
2 stops
LCY08:35London City
£894
Aer Lingus
18 Nov
LCY18:05London City
26h 35m
2 stops
SJU16:40San Juan Luis Munoz Marin Intl
22 Nov
SJU05:01San Juan Luis Munoz Marin Intl
23h 34m
2 stops
LCY08:35London City
£909
Aer Lingus
22 Sept
LCY20:30London City
23h 55m
2 stops
SJU15:25San Juan Luis Munoz Marin Intl
30 Sept
SJU14:50San Juan Luis Munoz Marin Intl
16h 55m
2 stops
LCY12:45London City
£924

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 27 July 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

Cheapest return flight

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 18/11

07:25-20:45

1 stop17h 20m

San Juan Luis Munoz Marin Intl

Sat 21/11

02:05-21:15

1 stop15h 10m

£491

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Mon 21/9

14:00-13:16

1 stop28h 16m

San Juan Luis Munoz Marin Intl

Sun 4/10

18:42-10:00

1 stop34h 18m

£512

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Fri 11/9

14:00-01:50

1 stop16h 50m

San Juan Luis Munoz Marin Intl

Sun 13/9

18:31-10:00

1 stop34h 29m

£548

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 22/9

11:55-13:39

1 stop30h 44m

San Juan Luis Munoz Marin Intl

Wed 30/9

06:00-20:45

1 stop33h 45m

£556

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 5/9

13:05-10:00

2 stops25h 55m

San Juan Luis Munoz Marin Intl

Tue 15/9

06:00-11:55

2 stops24h 55m

£815

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 5/9

13:05-10:00

2 stops25h 55m

San Juan Luis Munoz Marin Intl

Tue 15/9

06:00-11:55

2 stops24h 55m

£862

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 10/12

19:40-16:40

1 stop25h 00m

San Juan Luis Munoz Marin Intl

Sat 19/12

14:31-08:15

1 stop13h 44m

£944
Fastest return journey

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 10/12

10:45-20:00

1 stop13h 15m

San Juan Luis Munoz Marin Intl

Sat 19/12

18:56-12:05

1 stop13h 09m

£955

LondonSan Juan

LCY - SJU

LCYSJU

London City

Tue 22/9

09:35-18:30

1 stop13h 55m

San Juan Luis Munoz Marin Intl

Wed 30/9

14:22-12:10

2 stops16h 48m

£1,005

LondonSan Juan

LCY - SJU

LCYSJU

London City

Wed 18/11

07:50-16:40

1 stop12h 50m

San Juan Luis Munoz Marin Intl

Sun 22/11

11:34-08:50

2 stops17h 16m

£1,021

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?

Prices are currently low for flights on this route.

Typical prices usually range from £677 to £886.
The lowest price recently found on this route was £491.

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 February, then book flights to San Juan Luis Munoz Marin Intl Airport from London during September instead. Flights to San Juan Luis Munoz Marin Intl Airport in September, while not as cheap as those in February, still average around £604.

How far in advance should I book a flight from London 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 £710 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 £561 on momondo.

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

As of July 2026, prices for London to San Juan Luis Munoz Marin Intl Airport flights are approximately 23% 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

Frequently asked questions about flying from London to San Juan Luis Munoz Marin Intl Airport

  • 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 £335Free CancellationRating
7.5
694 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £438Free CancellationRating
7.1
3,027 reviews
Search JetBlue flights
IcelandairPriceFrom £497Free CancellationRating
7.0
715 reviews
Search Icelandair flights
IberiaPriceFrom £778Free CancellationRating
7.0
3,259 reviews
Search Iberia flights
British AirwaysPriceFrom £850Free CancellationRating
6.7
8,128 reviews
Search British Airways flights

Travelling to a place near San Juan?

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

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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