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Cheap flights from London Heathrow Airport to San Juan from £320

LHR — SJU
13 Dec — 20 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to San Juan

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to San Juan

Mon 28/1209:20 -
1 stop14h 01m
Wed 6/115:53 -
1 stop13h 37m
Deal found 12/11£596
Sun 6/1207:45 -
1 stop14h 39m
Thu 10/1215:00 -
1 stop14h 30m
Deal found 10/11£605
Mon 7/1209:20 -
1 stop14h 07m
Fri 11/1213:55 -
1 stop15h 35m
Deal found 12/11£638
Sat 5/1209:55 -
2 stops20h 03m
Sat 12/1215:35 -
1 stop16h 05m
Deal found 10/11£657
Sun 22/1120:25 -
2 stops33h 11m
Sat 5/1221:02 -
2 stops29h 23m
Deal found 8/11£662
Wed 9/1220:25 -
2 stops33h 33m
Wed 16/1205:01 -
2 stops27h 34m
Deal found 9/11£663
Thu 31/1207:25 -
1 stop14h 30m
Sat 16/117:35 -
1 stop23h 20m
Deal found 8/11£670
Wed 9/1206:40 -
2 stops22h 27m
Wed 23/1206:00 -
3 stops30h 00m
Deal found 9/11£671
Tue 8/1209:40 -
1 stop20h 18m
Mon 14/1203:28 -
1 stop23h 02m
Deal found 8/11£674
Sun 6/1220:15 -
3 stops33h 43m
Sat 12/1203:28 -
2 stops23h 42m
Deal found 10/11£679

Find flight deals from Heathrow to San Juan

Round-trip from

£596

One-way from

£320

Popular in

December

Cheapest in

February

Average price

£643
JetBlue
  • JetBlue
  • 28/12-6/1
  • 2 total stops
  • 27h 38m total
  • London to San Juan
Search Deals
8/2-31/12
  • 8/2-31/12
  • 2 total stops
  • 30h 10m total
  • London to San Juan
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£27 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2026
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from London Heathrow Airport to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Thu 4/2

07:25-23:29

1 stop20h 04m

San Juan Luis Munoz Marin Intl

Wed 31/12

00:00-05:00

Nonstop0h 00m

£460
Fastest return journey

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Sun 7/2

12:20-23:29

1 stop15h 09m

San Juan Luis Munoz Marin Intl

Wed 31/12

00:00-05:00

Nonstop0h 00m

£462

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Sat 6/2

08:05-21:55

1 stop17h 50m

San Juan Luis Munoz Marin Intl

Wed 31/12

00:00-05:00

Nonstop0h 00m

£462

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Fri 22/1

12:20-23:29

1 stop15h 09m

San Juan Luis Munoz Marin Intl

Wed 31/12

00:00-05:00

Nonstop0h 00m

£462

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Wed 12/5

11:55-22:53

1 stop15h 58m

San Juan Luis Munoz Marin Intl

Wed 31/12

00:00-05:00

Nonstop0h 00m

£467

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Wed 6/1

07:25-23:29

1 stop20h 04m

San Juan Luis Munoz Marin Intl

Wed 31/12

00:00-05:00

Nonstop0h 00m

£468

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Fri 5/2

13:40-15:27

2 stops29h 47m

San Juan Luis Munoz Marin Intl

Wed 31/12

00:00-05:00

Nonstop0h 00m

£505

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Wed 12/5

18:45-21:42

2 stops31h 57m

San Juan Luis Munoz Marin Intl

Wed 31/12

00:00-05:00

Nonstop0h 00m

£511

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Mon 23/11

08:15-02:36

2 stops22h 21m

San Juan Luis Munoz Marin Intl

Wed 31/12

00:00-05:00

Nonstop0h 00m

£538

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Thu 4/2

19:55-13:05

2 stops45h 10m

San Juan Luis Munoz Marin Intl

Wed 31/12

00:00-05:00

Nonstop0h 00m

£540

Flights are sorted by cheapest return flights first.

Deals found on 9/11

Showing 1-10 of 23 resultsSorted by cheapest first
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2
3

Best time to book a flight from Heathrow to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Heathrow with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to San Juan

What is the cheapest month to book a flight from London Heathrow Airport to San Juan?

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Juan (average of £573). Flying from London Heathrow Airport to San Juan in December is currently the most expensive (average of £1,039). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost for a return flight from London Heathrow Airport to San Juan?

Airfare is below average for this route at the moment.
London Heathrow Airport to San Juan flights typically cost between £610 and £800 in December.
The cheapest return price found within the last 5 days was £596 on JetBlue (28 Dec–6 Jan).

How far ahead should I book a flight from London Heathrow Airport to San Juan?

The best time to book flights from London Heathrow Airport to San Juan is 34 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing San Juan

Read reviews from past customers who have flown with JetBlue,Iberia, andBritish Airways from London Heathrow Airport to San Juan. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
JetBlue
7.1
Good
3,076 reviews
Check prices

Crew

7.9

Boarding

7.3

Entertainment

7.2

Overall

7.1

Food

6.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2024

BDL - SJU

My experience was very positive: I liked the big space among seats, the huge entertainment options, and the crew professionalism. My only complaint is the lacked of use of Spanish. As a Spanish speaker, I didn’t like this.
JetBlue
7.1
Good
3,076 reviews
JetBlue
7.1
Good
3,076 reviews
Check prices

Crew

7.9

Boarding

7.3

Entertainment

7.2

Overall

7.1

Food

6.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2024

BDL - SJU

My experience was very positive: I liked the big space among seats, the huge entertainment options, and the crew professionalism. My only complaint is the lacked of use of Spanish. As a Spanish speaker, I didn’t like this.
Iberia
7.0
Good
3,228 reviews
JetBlue
7.1
Good
3,076 reviews
Check prices

Crew

7.9

Boarding

7.3

Entertainment

7.2

Overall

7.1

Food

6.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2024

BDL - SJU

My experience was very positive: I liked the big space among seats, the huge entertainment options, and the crew professionalism. My only complaint is the lacked of use of Spanish. As a Spanish speaker, I didn’t like this.
British Airways
6.7
Okay
8,282 reviews
JetBlue
7.1
Good
3,076 reviews
Check prices

Crew

7.9

Boarding

7.3

Entertainment

7.2

Overall

7.1

Food

6.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2024

BDL - SJU

My experience was very positive: I liked the big space among seats, the huge entertainment options, and the crew professionalism. My only complaint is the lacked of use of Spanish. As a Spanish speaker, I didn’t like this.

Related info for your journey

  • How long is the flight from London Heathrow Airport to San Juan?

    Airlines like JetBlue fly from London Heathrow Airport to San Juan in about 17h 34m. The time it takes to get you to your destination can typically vary by up to . The distance from London Heathrow Airport to San Juan is about 4179 mi.

  • What are the cheapest airlines flying from London Heathrow Airport to San Juan round-trip?

    Our cheapest airline available from London Heathrow Airport to San Juan is JetBlue. Our recent data shows that you can find tickets from as low as £422 on this airline. Additional options worth looking into are Iberia and British Airways, starting at £855 and £855 round-trip. JetBlue is currently priced 43% below the average price you’ll pay for this route.

  • Can I find deals for flights from Heathrow to San Juan that include hotel bookings?

    Yes. In addition to deals on Heathrow to San Juan flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to San Juan?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to San Juan.

  • Can I find deals for business class flights from Heathrow to San Juan?

    Yes. Cheapflights offers flight deals from Heathrow to San Juan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to San Juan?

    Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Juan (average of £573). Flying from London Heathrow Airport to San Juan in December is currently the most expensive (average of £1,039). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Heathrow to San Juan

AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£422Average£647FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
IberiaCheapest£855Average£1,038FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£855Average£1,089FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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Why should you use Cheapflights to find cheap flight tickets from Heathrow to San Juan?

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Users can book flights with no change fees policies with our dedicated filters. Book flights from Heathrow to San Juan flexibly with Cheapflights today.

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