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Cheap flights from London Heathrow Airport to San Juan from £364

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 Heathrow Airport to San Juan departing on 26/2. 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 Heathrow Airport to San Juan

Cheap return flights

Enter your travel dates to find the best prices.
JetBlue Logo
08:05 - 18:53
LHR
-
SJU
14h 48m
1 stop
JetBlue Logo
05:10 - 06:55
SJU
-
LHR
21h 45m
1 stop
£402JetBlue
Mon, 9 Mar - Tue, 17 Mar
JetBlue Logo
12:20 - 02:54
LHR
-
SJU
18h 34m
1 stop
JetBlue Logo
05:01 - 21:40
SJU
-
LHR
12h 39m
1 stop
£403JetBlue
Mon, 9 Mar - Tue, 17 Mar
JetBlue Logo
09:20 - 21:56
LHR
-
SJU
16h 36m
1 stop
JetBlue Logo
11:10 - 06:55
SJU
-
LHR
15h 45m
1 stop
£411JetBlue
Tue, 3 Mar - Tue, 10 Mar
JetBlue Logo
07:25 - 22:31
LHR
-
SJU
19h 06m
1 stop
JetBlue Logo
11:10 - 06:55
SJU
-
LHR
15h 45m
1 stop
£413JetBlue
Tue, 24 Feb - Wed, 11 Mar
JetBlue Logo
12:20 - 11:58
LHR
-
SJU
27h 38m
1 stop
JetBlue Logo
05:01 - 21:40
SJU
-
LHR
12h 39m
1 stop
£414JetBlue
Mon, 9 Mar - Tue, 17 Mar
JetBlue Logo
08:05 - 18:53
LHR
-
SJU
14h 48m
1 stop
JetBlue Logo
05:10 - 06:55
SJU
-
LHR
21h 45m
1 stop
£418JetBlue
Mon, 9 Mar - Tue, 17 Mar
JetBlue Logo
12:20 - 23:29
LHR
-
SJU
15h 09m
1 stop
JetBlue Logo
05:10 - 06:55
SJU
-
LHR
21h 45m
1 stop
£418JetBlue
Mon, 9 Mar - Tue, 17 Mar
JetBlue Logo
12:20 - 23:29
LHR
-
SJU
15h 09m
1 stop
JetBlue Logo
05:10 - 06:55
SJU
-
LHR
21h 45m
1 stop
£423JetBlue
Mon, 9 Mar - Tue, 17 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
£429JetBlue
Fri, 6 Mar - Sat, 14 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
£430JetBlue
Fri, 6 Mar - Sat, 14 Mar

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

Our best JetBlue deals on London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flight tickets
JetBlue
9 Mar
LHR08:05London Heathrow
14h 48m
1 stop
SJU18:53San Juan Luis Munoz Marin Intl
17 Mar
SJU05:10San Juan Luis Munoz Marin Intl
21h 45m
1 stop
LHR06:55London Heathrow
£402
JetBlue
9 Mar
LHR12:20London Heathrow
18h 34m
1 stop
SJU02:54San Juan Luis Munoz Marin Intl
17 Mar
SJU05:01San Juan Luis Munoz Marin Intl
12h 39m
1 stop
LHR21:40London Heathrow
£403
JetBlue
3 Mar
LHR09:20London Heathrow
16h 36m
1 stop
SJU21:56San Juan Luis Munoz Marin Intl
10 Mar
SJU11:10San Juan Luis Munoz Marin Intl
15h 45m
1 stop
LHR06:55London Heathrow
£411

TAP AIR PORTUGAL flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport

Our best TAP AIR PORTUGAL deals on London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flight tickets
TAP AIR PORTUGAL
6 Feb
LHR18:30London Heathrow
32h 25m
2 stops
SJU22:55San Juan Luis Munoz Marin Intl
8 Feb
SJU05:01San Juan Luis Munoz Marin Intl
37h 39m
2 stops
LHR22:40London Heathrow
£638
TAP AIR PORTUGAL
3 Feb
LHR08:15London Heathrow
29h 43m
2 stops
SJU09:58San Juan Luis Munoz Marin Intl
7 Feb
SJU06:09San Juan Luis Munoz Marin Intl
29h 21m
2 stops
LHR15:30London Heathrow
£647
TAP AIR PORTUGAL
2 Feb
LHR06:00London Heathrow
21h 48m
2 stops
SJU23:48San Juan Luis Munoz Marin Intl
6 Feb
SJU06:01San Juan Luis Munoz Marin Intl
25h 24m
2 stops
LHR11:25London Heathrow
£929

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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 2 February 2026.
Use the filters below to find and compare flights from London Heathrow Airport 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

Mon 9/3

08:05-18:53

1 stop14h 48m

San Juan Luis Munoz Marin Intl

Tue 17/3

05:10-06:55

1 stop21h 45m

£402

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 9/3

12:20-02:54

1 stop18h 34m

San Juan Luis Munoz Marin Intl

Tue 17/3

05:01-21:40

1 stop12h 39m

£403

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 3/3

09:20-21:56

1 stop16h 36m

San Juan Luis Munoz Marin Intl

Tue 10/3

11:10-06:55

1 stop15h 45m

£411

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 24/2

07:25-22:31

1 stop19h 06m

San Juan Luis Munoz Marin Intl

Wed 11/3

11:10-06:55

1 stop15h 45m

£413

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 9/3

12:20-11:58

1 stop27h 38m

San Juan Luis Munoz Marin Intl

Tue 17/3

05:01-21:40

1 stop12h 39m

£414

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 9/3

08:05-18:53

1 stop14h 48m

San Juan Luis Munoz Marin Intl

Tue 17/3

05:10-06:55

1 stop21h 45m

£418

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 9/3

12:20-23:29

1 stop15h 09m

San Juan Luis Munoz Marin Intl

Tue 17/3

05:10-06:55

1 stop21h 45m

£418

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 9/3

12:20-23:29

1 stop15h 09m

San Juan Luis Munoz Marin Intl

Tue 17/3

05:10-06:55

1 stop21h 45m

£423

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 6/3

08:05-00:29

1 stop20h 24m

San Juan Luis Munoz Marin Intl

Sat 14/3

02:30-06:55

1 stop24h 25m

£429

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 6/3

08:05-00:29

1 stop20h 24m

San Juan Luis Munoz Marin Intl

Sat 14/3

02:30-06:55

1 stop24h 25m

£430

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 Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport during March instead. Flights to San Juan Luis Munoz Marin Intl Airport in March, while not as cheap as those in September, still average around £556.

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 Heathrow Airport 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 £639 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 Heathrow Airport for as low as £512 on momondo.

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

As of February 2026, prices for London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flights are approximately 40% cheaper when compared to flights at the same time last year.

When to book flights from London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport to San Juan Luis Munoz Marin Intl Airport (LHR to SJU) flight deals and tips

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

Fastest flight time

14h 11m

Direct flights

None
The fastest flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport takes 14h 11m
There are no direct flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport. There are no popular flight routes from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport.
Search flight deals

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

    The straight-line distance from London Heathrow to San Juan Luis Munoz Marin Intl is 4178.9 mi. 14h 11m is a normal flight duration for this route.

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

    Prices for flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport were last updated today.

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

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

    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 Heathrow Airport 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 required for your trip to San Juan Luis Munoz Marin Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at San Juan Luis Munoz Marin Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

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

Compare and see reviews for airlines that fly from London Heathrow Airport 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
2,892 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
7,709 reviews
Search British Airways flights
IberiaPriceFrom £543Free CancellationRating
7.0
3,101 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?

It is quick and easy to find London to San Juan flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Juan that suits you.

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

All flight searches from London to San Juan on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to San Juan.

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

Price alerts on flights to San Juan from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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