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Cheap flights from London Heathrow Airport to San Juan from £340

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
24 Dec — 31 Dec1
1 adult

The best prices from London Heathrow to San Juan are usually found in April or September, booked 76 days in advance, depart on a Monday or Wednesday and return on a Tuesday

Cheap flight deals from Heathrow to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to San Juan (PR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 19 December 2024.

Round-trip from

£526

One-way from

£340

Popular in

July

Cheapest in

April

Average price

£830
JetBlue
  • JetBlue
  • 12/1-27/1
  • 2 total stops
  • 37h 41m total
  • London to San Juan
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15/1
  • 15/1
  • 2 total stops
  • 49h 31m total
  • London to San Juan
Search Deals
High demand for flights, 18% potential price rise
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Best time to find cheap flights, 3% potential price drop
Search Deals
Average for round-trip flights in December 2024
Search Deals

Find flight deals from Heathrow to San Juan

Cheapest flights from Heathrow to San Juan
Explore the most affordable flight options available from Heathrow to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 December 2024.

Fri 27/1208:25LHR - SJU
1 stop23h 23mIcelandair
Wed 8/101:55SJU - LHR
1 stop14h 50mIcelandair
Deal found 18/12£680
Tue 31/1207:25LHR - SJU
1 stop20h 26mJetBlue
Tue 14/111:45SJU - LHR
1 stop17h 45mJetBlue
Deal found 18/12£692
Sat 28/1210:35LHR - SJU
2 stops17h 51mFinnair
Tue 7/108:05SJU - LHR
1 stop21h 10mFinnair
Deal found 18/12£802
Mon 30/1212:35LHR - SJU
1 stop15h 51mAmerican Airlines
Thu 9/112:35SJU - LHR
1 stop14h 25mAmerican Airlines
Deal found 18/12£863
Sun 29/1210:05LHR - SJU
1 stop13h 40mBritish Airways
Thu 9/121:20SJU - LHR
1 stop15h 15mBritish Airways
Deal found 18/12£864
Mon 30/1212:35LHR - SJU
1 stop15h 51mIberia
Thu 9/121:20SJU - LHR
1 stop13h 35mIberia
Deal found 18/12£873
Sun 29/1215:50LHR - SJU
1 stop14h 28mDelta
Thu 9/114:29SJU - LHR
1 stop13h 26mDelta
Deal found 18/12£877
Mon 30/1209:15LHR - SJU
1 stop14h 30mMultiple Airlines
Tue 14/121:20SJU - LHR
1 stop16h 55mMultiple Airlines
Deal found 18/12£976
Sat 28/1214:30LHR - SJU
1 stop28h 10mAir Canada
Sun 5/102:05SJU - LHR
2 stops24h 25mAir Canada
Deal found 18/12£1,133
Fri 27/1216:20LHR - SJU
1 stop34h 02mUnited Airlines
Thu 9/115:46SJU - LHR
2 stops36h 09mUnited Airlines
Deal found 18/12£1,151
Sat 28/1215:00LHR - SJU
2 stops27h 40mLufthansa
Tue 7/117:50SJU - LHR
2 stops33h 20mLufthansa
Deal found 18/12£1,225
Mon 30/1221:40LHR - SJU
1 stop18h 00mAvianca
Tue 7/118:05SJU - LHR
1 stop16h 30mAvianca
Deal found 18/12£1,346

Find flights from Heathrow to San Juan within your budget

Customise your flight search to find flights from Heathrow to San Juan 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, Cheapflights users made 858,174 searches. Data last updated 19 December 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 3/3

12:20-03:16

1 stop18h 56m

San Juan Luis Munoz Marin Intl

Wed 5/3

22:45-20:45

1 stop18h 00m

£526

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 20/1

07:25-03:50

1 stop24h 25m

San Juan Luis Munoz Marin Intl

Sat 1/2

05:00-05:55

1 stop20h 55m

£533

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 20/1

08:25-23:58

2 stops19h 33m

San Juan Luis Munoz Marin Intl

Sat 1/2

12:50-07:50

2 stops15h 00m

£542

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 5/2

08:00-12:23

2 stops32h 23m

San Juan Luis Munoz Marin Intl

Thu 27/2

10:44-10:15

1 stop19h 31m

£548

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 11/3

07:20-19:45

2 stops16h 25m

San Juan Luis Munoz Marin Intl

Sun 16/3

17:29-12:20

1 stop14h 51m

£558

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 24/1

06:50-22:22

2 stops19h 32m

San Juan Luis Munoz Marin Intl

Wed 5/2

15:46-06:40

2 stops34h 54m

£590

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sun 9/2

11:10-12:47

2 stops29h 37m

San Juan Luis Munoz Marin Intl

Fri 14/2

02:05-07:10

2 stops25h 05m

£624

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 18/2

06:00-23:59

2 stops21h 59m

San Juan Luis Munoz Marin Intl

Wed 26/2

16:22-17:30

2 stops21h 08m

£651

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 20/1

15:00-22:22

2 stops35h 22m

San Juan Luis Munoz Marin Intl

Thu 30/1

17:50-06:30

2 stops32h 40m

£666

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 17/2

11:25-19:45

1 stop12h 20m

San Juan Luis Munoz Marin Intl

Mon 3/3

14:25-06:35

1 stop12h 10m

£831

Flights are sorted by cheapest return flights first.

Deals found on 18/12

Showing 1-10 of 20 results
1
2

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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Heathrow to San Juan

Get recent, data-driven insights about flights from Heathrow to San Juan including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a return flight from Heathrow to San Juan. Price data was last updated on 13 December 2024.

The best time to book flights from London Heathrow Airport to San Juan is 76 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.

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

Currently, April is the cheapest month in which you can book a flight from London Heathrow Airport to San Juan (average of £631). Flying from London Heathrow Airport to San Juan in July is currently the most expensive (average of £1,027). 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.

What is the cheapest time of day to fly from LHR to SJU?

Find hourly flight availability from Heathrow to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 19 December 2024.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to San Juan in the morning. If you’re flexible enough to do this you can expect to save up to 22% on your trip compared to booking a flight in the evening.

What is the cheapest day to fly from London Heathrow Airport to San Juan?

Use this chart to determine the cheapest time to fly return from Heathrow to San Juan. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London Heathrow Airport to San Juan flight should consider departing on Monday mornings when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in San Juan by month

Plan your trip to San Juan by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Juan ranges from 55.0 - 156.0 inches per month. November is typically the wettest month, when rainfall can reach 156.0 mm. March is typically the driest time to visit San Juan when rainfall is around 55.0 mm.

Temperature in San Juan by month

Plan your trip to San Juan by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Juan, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 28.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 25.0 C).

Reviews of airlines servicing San Juan

Get insights into the airlines that provide service to San Juan. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Juan. Reviews last updated 19 December 2024.
Peruse reviews from past customers who have flown with JetBlue, Lufthansa and TAP AIR PORTUGAL from London to San Juan to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.7
Good
1,285 reviews
Check prices

Crew

8.2

Food

6.7

Comfort

7.5

Entertainment

6.9

Boarding

7.7

Overall

7.7

Reviews

1 / 10

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight

Finnair
7.7
Good
1,285 reviews
Finnair
7.7
Good
1,285 reviews
Check prices

Crew

8.2

Food

6.7

Comfort

7.5

Entertainment

6.9

Boarding

7.7

Overall

7.7

Reviews

1 / 10

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight

JetBlue
7.4
Good
3,279 reviews
Finnair
7.7
Good
1,285 reviews
Check prices

Crew

8.2

Food

6.7

Comfort

7.5

Entertainment

6.9

Boarding

7.7

Overall

7.7

Reviews

1 / 10

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight

United Airlines
7.4
Good
9,048 reviews
Finnair
7.7
Good
1,285 reviews
Check prices

Crew

8.2

Food

6.7

Comfort

7.5

Entertainment

6.9

Boarding

7.7

Overall

7.7

Reviews

1 / 10

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight

Icelandair
7.1
Good
509 reviews
Finnair
7.7
Good
1,285 reviews
Check prices

Crew

8.2

Food

6.7

Comfort

7.5

Entertainment

6.9

Boarding

7.7

Overall

7.7

Reviews

1 / 10

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight

TAP AIR PORTUGAL
7.1
Good
1,878 reviews
Finnair
7.7
Good
1,285 reviews
Check prices

Crew

8.2

Food

6.7

Comfort

7.5

Entertainment

6.9

Boarding

7.7

Overall

7.7

Reviews

1 / 10

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight

Related info for your journey

Find useful and relevant information for your journey from Heathrow to San Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 £526 on this airline. Additional options worth looking into are Icelandair and Finnair, starting at £533 and £542 round-trip. JetBlue is currently priced 20% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from London Heathrow Airport to San Juan one-way?

    The cheapest airline one-way is Avianca, with whom users have recently found tickets for as low as £544. However, be on the lookout for offers from United Airlines and TAP AIR PORTUGAL, as they are both options that can get you from London Heathrow Airport to San Juan for a low price.

  • 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, April is the cheapest month in which you can book a flight from London Heathrow Airport to San Juan (average of £631). Flying from London Heathrow Airport to San Juan in July is currently the most expensive (average of £1,027). 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

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Top 6 airlines flying from Heathrow to San Juan

Discover the top 6 airlines that operate flights from Heathrow to San Juan. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 19 December 2024.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£409Average£994FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
JetBlueCheapest£432Average£660FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
FinnairCheapest£452Average£584FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IcelandairCheapest£475Average£575FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£545Average£802FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£594Average£795FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Heathrow to San Juan?

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

Cheapflights simply makes it quick and affordable to book flights from Heathrow to San Juan by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Heathrow to San Juan with no change fees?

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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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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