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Cheap flights from London Heathrow Airport to San Juan from £267

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 26/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
26 Jan — 2 Feb1
1 adult

The best prices from London Heathrow to San Juan are usually found in September or April, 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 21 January 2025.

Round-trip from

£523

One-way from

£267

Popular in

August

Cheapest in

September

Average price

£605
Iberia
  • Iberia
  • 17/2-24/2
  • 2 total stops
  • 32h 45m total
  • London to San Juan
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26/2
  • 26/2
  • 2 total stops
  • 53h 25m total
  • London to San Juan
Search Deals
High demand for flights, 13% potential price rise
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Best time to find cheap flights, 3% potential price drop
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Average for round-trip flights in January 2025
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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 21 January 2025.

Mon 17/211:45LHR - SJU
1 stop16h 10mIberia
Mon 24/212:40SJU - LHR
1 stop16h 35mIberia
Deal found 20/1£523
Wed 23/408:25LHR - SJU
1 stop20h 32mJetBlue
Sat 10/513:30SJU - LHR
1 stop15h 00mJetBlue
Deal found 18/1£528
Wed 5/208:55LHR - SJU
2 stops35h 01mMultiple Airlines
Tue 11/208:43SJU - LHR
1 stop17h 42mMultiple Airlines
Deal found 20/1£545
Tue 4/307:25LHR - SJU
1 stop20h 25mIcelandair
Sun 9/300:59SJU - LHR
1 stop24h 56mIcelandair
Deal found 20/1£546
Fri 28/208:40LHR - SJU
2 stops19h 15mFinnair
Sun 9/315:24SJU - LHR
1 stop16h 36mFinnair
Deal found 19/1£597
Fri 24/118:00LHR - SJU
1 stop24h 40mAir Canada
Fri 31/108:10SJU - LHR
2 stops19h 00mAir Canada
Deal found 20/1£634
Fri 24/115:00LHR - SJU
2 stops27h 40mLufthansa
Wed 5/202:05SJU - LHR
2 stops25h 05mLufthansa
Deal found 20/1£636
Tue 11/313:40LHR - SJU
2 stops28h 15mTAP AIR PORTUGAL
Wed 19/312:51SJU - LHR
2 stops22h 39mTAP AIR PORTUGAL
Deal found 19/1£679
Tue 1/710:05LHR - SJU
1 stop17h 35mBritish Airways
Tue 29/706:35SJU - LHR
1 stop19h 20mBritish Airways
Deal found 20/1£721

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 21 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 17/2

11:45-23:55

1 stop16h 10m

San Juan Luis Munoz Marin Intl

Mon 24/2

12:40-09:15

1 stop16h 35m

£523

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 23/4

08:25-23:57

1 stop20h 32m

San Juan Luis Munoz Marin Intl

Sat 10/5

13:30-09:30

1 stop15h 00m

£528

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 5/2

08:55-15:56

2 stops35h 01m

San Juan Luis Munoz Marin Intl

Tue 11/2

08:43-06:25

1 stop17h 42m

£545

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 4/3

07:25-23:50

1 stop20h 25m

San Juan Luis Munoz Marin Intl

Sun 9/3

00:59-05:55

1 stop24h 56m

£546

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 28/2

08:40-23:55

2 stops19h 15m

San Juan Luis Munoz Marin Intl

Sun 9/3

15:24-12:00

1 stop16h 36m

£597

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

£642

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 25/4

09:30-23:57

2 stops19h 27m

San Juan Luis Munoz Marin Intl

Thu 8/5

01:05-06:35

2 stops24h 30m

£652

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 11/3

13:40-13:55

2 stops28h 15m

San Juan Luis Munoz Marin Intl

Wed 19/3

12:51-15:30

2 stops22h 39m

£679

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 1/7

10:05-22:40

1 stop17h 35m

San Juan Luis Munoz Marin Intl

Tue 29/7

06:35-06:55

1 stop19h 20m

£721

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 26/2

15:15-16:40

2 stops53h 25m

£267

Flights are sorted by cheapest return flights first.

Deals found on 20/1

Showing 1-10 of 18 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 17 January 2025.

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 21 January 2025.

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 21 January 2025.
Peruse reviews from past customers who have flown with Iberia, Lufthansa and Air Canada 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
7.6
Good
1,285 reviews
Check prices

Entertainment

6.9

Overall

7.6

Boarding

7.7

Food

6.7

Comfort

7.5

Crew

8.1

Reviews

1 / 10

Finnair need to get a better system for boarding. Hundreds of passengers all attempting to get their boarding cards and passports checked at the gate and then get onto the aircraft is ridiculous, time consuming and frankly unfair to passengers.

Finnair
7.6
Good
1,285 reviews
Finnair
7.6
Good
1,285 reviews
Check prices

Entertainment

6.9

Overall

7.6

Boarding

7.7

Food

6.7

Comfort

7.5

Crew

8.1

Reviews

1 / 10

Finnair need to get a better system for boarding. Hundreds of passengers all attempting to get their boarding cards and passports checked at the gate and then get onto the aircraft is ridiculous, time consuming and frankly unfair to passengers.

JetBlue
7.4
Good
3,201 reviews
Finnair
7.6
Good
1,285 reviews
Check prices

Entertainment

6.9

Overall

7.6

Boarding

7.7

Food

6.7

Comfort

7.5

Crew

8.1

Reviews

1 / 10

Finnair need to get a better system for boarding. Hundreds of passengers all attempting to get their boarding cards and passports checked at the gate and then get onto the aircraft is ridiculous, time consuming and frankly unfair to passengers.

United Airlines
7.4
Good
8,982 reviews
Finnair
7.6
Good
1,285 reviews
Check prices

Entertainment

6.9

Overall

7.6

Boarding

7.7

Food

6.7

Comfort

7.5

Crew

8.1

Reviews

1 / 10

Finnair need to get a better system for boarding. Hundreds of passengers all attempting to get their boarding cards and passports checked at the gate and then get onto the aircraft is ridiculous, time consuming and frankly unfair to passengers.

WestJet
7.2
Good
2,828 reviews
Finnair
7.6
Good
1,285 reviews
Check prices

Entertainment

6.9

Overall

7.6

Boarding

7.7

Food

6.7

Comfort

7.5

Crew

8.1

Reviews

1 / 10

Finnair need to get a better system for boarding. Hundreds of passengers all attempting to get their boarding cards and passports checked at the gate and then get onto the aircraft is ridiculous, time consuming and frankly unfair to passengers.

Icelandair
7.1
Good
501 reviews
Finnair
7.6
Good
1,285 reviews
Check prices

Entertainment

6.9

Overall

7.6

Boarding

7.7

Food

6.7

Comfort

7.5

Crew

8.1

Reviews

1 / 10

Finnair need to get a better system for boarding. Hundreds of passengers all attempting to get their boarding cards and passports checked at the gate and then get onto the aircraft is ridiculous, time consuming and frankly unfair to passengers.

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 Iberia. Our recent data shows that you can find tickets from as low as £523 on this airline. Additional options worth looking into are JetBlue and Icelandair, starting at £528 and £546 round-trip. Iberia is currently priced 24% 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 Air Canada, with whom users have recently found tickets for as low as £532. However, be on the lookout for offers from JetBlue and Iberia, 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 21 January 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£467Average£608FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IcelandairCheapest£490Average£591FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
JetBlueCheapest£496Average£693FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
IberiaCheapest£579Average£801FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£615Average£824FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£921Average£1,114FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights helps you search for flights from Heathrow to San Juan via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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.

Can Cheapflights notify me if prices for flights from Heathrow to San Juan become cheaper?

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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