Cheap flights from Heathrow to San Juan
Know your dates, get live prices in seconds:
We work with more than 300 partners to bring you better travel deals
How to find the cheapest flight from
Heathrow (LHR) to San Juan (SJU)
What is the cheapest day to fly return from Heathrow to San Juan?
It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.
How far in advance should I book a flight from Heathrow to San Juan?
Find a great deal and save up to 30% by booking at least 55 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Heathrow to San Juan within the next two weeks, with the cheapest ticket starting at £586.
When is the cheapest time to fly from Heathrow to San Juan (LHR - PR1)?
Unlike at midday, when flights are generally more expensive, you can save up to 21% on flights from Heathrow to San Juan by exploring options for tickets in the afternoon.