Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from London Heathrow Airport to San Juan from £334

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 18/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
11:55 - 21:32
LHR
-
SJU
14h 37m
1 stop
JetBlue Logo
13:00 - 06:30
SJU
-
LHR
12h 30m
1 stop
£538JetBlue
Wed, 8 Apr - Wed, 15 Apr
JetBlue Logo
11:55 - 00:07
LHR
-
SJU
17h 12m
1 stop
JetBlue Logo
12:50 - 06:30
SJU
-
LHR
12h 40m
1 stop
£545JetBlue
Thu, 30 Apr - Sat, 9 May
JetBlue Logo
08:15 - 18:30
LHR
-
SJU
15h 15m
1 stop
JetBlue Logo
21:59 - 09:30
SJU
-
LHR
30h 31m
1 stop
£554JetBlue
Mon, 4 May - Mon, 11 May
JetBlue Logo
08:15 - 21:01
LHR
-
SJU
17h 46m
1 stop
JetBlue Logo
19:25 - 20:45
SJU
-
LHR
20h 20m
1 stop
£555JetBlue
Wed, 6 May - Wed, 13 May
JetBlue Logo
08:15 - 00:07
LHR
-
SJU
20h 52m
1 stop
JetBlue Logo
06:25 - 09:30
SJU
-
LHR
22h 05m
1 stop
£556JetBlue
Tue, 5 May - Tue, 12 May
JetBlue Logo
08:40 - 02:39
LHR
-
SJU
22h 59m
1 stop
JetBlue Logo
18:55 - 20:45
SJU
-
LHR
20h 50m
1 stop
£570JetBlue
Tue, 14 Apr - Tue, 21 Apr
JetBlue Logo
08:15 - 18:31
LHR
-
SJU
15h 16m
1 stop
JetBlue Logo
12:00 - 09:30
SJU
-
LHR
16h 30m
1 stop
£583JetBlue
Tue, 21 Apr - Tue, 28 Apr
JetBlue Logo
08:15 - 21:01
LHR
-
SJU
17h 46m
1 stop
JetBlue Logo
21:59 - 09:30
SJU
-
LHR
30h 31m
1 stop
£584JetBlue
Sun, 3 May - Sun, 10 May
JetBlue Logo
08:15 - 16:50
LHR
-
SJU
13h 35m
1 stop
JetBlue Logo
14:25 - 20:45
SJU
-
LHR
25h 20m
1 stop
£585JetBlue
Wed, 9 Sep - Sat, 19 Sep
JetBlue Logo
08:15 - 16:50
LHR
-
SJU
13h 35m
1 stop
JetBlue Logo
19:55 - 06:30
SJU
-
LHR
29h 35m
1 stop
£590JetBlue
Wed, 9 Sep - Sat, 19 Sep

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

Our best Avianca deals on London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flight tickets
Avianca
17 Apr
LHR22:05London Heathrow
18h 20m
1 stop
SJU11:25San Juan Luis Munoz Marin Intl
25 Apr
SJU18:35San Juan Luis Munoz Marin Intl
16h 00m
1 stop
LHR15:35London Heathrow
£651
Avianca
14 May
LHR22:05London Heathrow
24h 05m
1 stop
SJU17:10San Juan Luis Munoz Marin Intl
25 May
SJU18:35San Juan Luis Munoz Marin Intl
16h 00m
1 stop
LHR15:35London Heathrow
£665
Avianca
23 May
LHR22:05London Heathrow
24h 05m
1 stop
SJU17:10San Juan Luis Munoz Marin Intl
25 May
SJU18:35San Juan Luis Munoz Marin Intl
16h 00m
1 stop
LHR15:35London Heathrow
£674

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
8 Apr
LHR11:55London Heathrow
14h 37m
1 stop
SJU21:32San Juan Luis Munoz Marin Intl
15 Apr
SJU13:00San Juan Luis Munoz Marin Intl
12h 30m
1 stop
LHR06:30London Heathrow
£538
JetBlue
30 Apr
LHR11:55London Heathrow
17h 12m
1 stop
SJU00:07San Juan Luis Munoz Marin Intl
9 May
SJU12:50San Juan Luis Munoz Marin Intl
12h 40m
1 stop
LHR06:30London Heathrow
£545
JetBlue
4 May
LHR08:15London Heathrow
15h 15m
1 stop
SJU18:30San Juan Luis Munoz Marin Intl
11 May
SJU21:59San Juan Luis Munoz Marin Intl
30h 31m
1 stop
LHR09:30London Heathrow
£554

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 23 March 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

Cheapest return flight
Fastest return journey

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 8/4

11:55-21:32

1 stop14h 37m

San Juan Luis Munoz Marin Intl

Wed 15/4

13:00-06:30

1 stop12h 30m

£538

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 30/4

11:55-00:07

1 stop17h 12m

San Juan Luis Munoz Marin Intl

Sat 9/5

12:50-06:30

1 stop12h 40m

£545

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 4/5

08:15-18:30

1 stop15h 15m

San Juan Luis Munoz Marin Intl

Mon 11/5

21:59-09:30

1 stop30h 31m

£554

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 6/5

08:15-21:01

1 stop17h 46m

San Juan Luis Munoz Marin Intl

Wed 13/5

19:25-20:45

1 stop20h 20m

£555

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 5/5

08:15-00:07

1 stop20h 52m

San Juan Luis Munoz Marin Intl

Tue 12/5

06:25-09:30

1 stop22h 05m

£556

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 14/4

08:40-02:39

1 stop22h 59m

San Juan Luis Munoz Marin Intl

Tue 21/4

18:55-20:45

1 stop20h 50m

£570

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 21/4

08:15-18:31

1 stop15h 16m

San Juan Luis Munoz Marin Intl

Tue 28/4

12:00-09:30

1 stop16h 30m

£583

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sun 3/5

08:15-21:01

1 stop17h 46m

San Juan Luis Munoz Marin Intl

Sun 10/5

21:59-09:30

1 stop30h 31m

£584

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 9/9

08:15-16:50

1 stop13h 35m

San Juan Luis Munoz Marin Intl

Sat 19/9

14:25-20:45

1 stop25h 20m

£585

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 9/9

08:15-16:50

1 stop13h 35m

San Juan Luis Munoz Marin Intl

Sat 19/9

19:55-06:30

1 stop29h 35m

£590

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 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 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 November instead. Flights to San Juan Luis Munoz Marin Intl Airport in November, while not as cheap as those in September, still average around £594.

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 £670 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 £525 on momondo.

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

As of March 2026, prices for London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flights are approximately 2% more expensive 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

13h 35m

Direct flights

None
The fastest flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport takes 13h 35m
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. 13h 35m 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 £334Free CancellationRating
7.5
683 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £410Free CancellationRating
7.2
2,911 reviews
Search JetBlue flights
FinnairPriceFrom £492Free CancellationRating
7.7
1,374 reviews
Search Finnair flights
IcelandairPriceFrom £508Free CancellationRating
7.0
625 reviews
Search Icelandair flights
AviancaPriceFrom £540Free CancellationRating
6.5
2,505 reviews
Search Avianca flights
IberiaPriceFrom £585Free CancellationRating
7.0
3,147 reviews
Search Iberia flights
British AirwaysPriceFrom £610Free CancellationRating
6.7
7,810 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
Carolina
Fajardo
Dorado
Luquillo

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.

An easier way to manage your San Juan Luis Munoz Marin Intl Airport trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 22/4
Wed 29/4
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to San Juan