Cheap flights from the United Kingdom to San Juan from £426
This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to San Juan departing on 9/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
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.Find the cheapest flights from the United Kingdom to San Juan
Recent return flight deals from the United Kingdom to San Juan
Recent one-way flight deals from the United Kingdom to San Juan
Recent last minute flight deals from the United Kingdom to San Juan
Icelandair flights from United Kingdom to San Juan
Our best Icelandair deals on United Kingdom to San Juan flight tickets
TAP AIR PORTUGAL flights from United Kingdom to San Juan
Our best TAP AIR PORTUGAL deals on United Kingdom to San Juan flight tickets
See travel insights to San Juan from
How to get the cheapest flight ticket from United Kingdom to San Juan
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?
The cheapest month to fly to San Juan from United Kingdom is in September. Flight prices, which tend to average around £532, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to San Juan from United Kingdom during November instead. Flights to San Juan in November, while not as cheap as those in September, still average around £542.
What is the cheapest day to depart on your flight to San Juan?
The cheapest day to depart on your flight to San Juan is on a Monday when prices can be found for as low as £519. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to San Juan is Saturday, with ticket prices averaging around £632.
What is the cheapest time of day to depart on your flight to San Juan?
In the morning is the cheapest time of day to fly from United Kingdom to San Juan when you can find flight prices for as low as £573. Flying to San Juan in the morning is an ideal time because this is during off-peak travel hours. Flights in the afternoon are often more expensive, with an average ticket price of £819.
How far in advance should I book a flight to San Juan?
You are more likely to see cheaper flights to San Juan from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan for around £632 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 from United Kingdom for as low as £499 on momondo.
What is the cheapest airline that flies from United Kingdom to San Juan?
Avianca, Icelandair, and JetBlue are the most popular carriers operating from United Kingdom to San Juan
Which airlines fly to San Juan?
Finnair, Iberia and Icelandair are the top three most popular airlines that fly to San Juan from United Kingdom according to our data. Finnair is the first choice among our users, with 42% of people opting to fly with this airline when travelling to San Juan. Keep in mind that there are 9 different airlines that fly to San Juan on a routine basis, so you have a few additional options to choose from.
Cheap United Kingdom to San Juan flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from United Kingdom to San Juan
When did momondo last update prices for flights from United Kingdom to San Juan?
Prices for flights from United Kingdom to San Juan are refreshed on a daily basis.
How many operators does momondo search for flights from United Kingdom to San Juan?
There are 8 operators available for flights from United Kingdom to San Juan as of July 2025.
How old do you have to be to fly from United Kingdom to San Juan?
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 United Kingdom to San Juan.
What documentation or ID do you need to fly to San Juan?
The necessary travel and health documents for your San Juan trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
Best airlines flying from United Kingdom to San Juan
Compare and see reviews for airlines that fly from United Kingdom to San Juan with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £351 | Free Cancellation | Rating 7.4 654 reviews | |||
| PriceFrom £404 | Free Cancellation | Rating 7.3 2,920 reviews | |||
| PriceFrom £408 | Free Cancellation | Rating 7.6 1,299 reviews | |||
| PriceFrom £415 | Free Cancellation | Rating 7.0 514 reviews | |||
| PriceFrom £486 | Free Cancellation | Rating 6.6 7,081 reviews | |||
| PriceFrom £501 | Free Cancellation | Rating 7.0 2,811 reviews | |||
| PriceFrom £644 | Free Cancellation | Rating 7.1 1,140 reviews | |||
| PriceFrom £822 | Free Cancellation | Rating 8.0 7,973 reviews | |||
| PriceFrom £848 | Free Cancellation | Rating 7.8 1,366 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from United Kingdom to San Juan?
Finding the right flight to San Juan from United Kingdom is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to San Juan quick and easy, saving you time and money.
Can I find flights from United Kingdom to San Juan with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to San Juan from United Kingdom with this policy.
How can momondo help me find flights from United Kingdom to San Juan?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Juan from United Kingdom.
I’m not ready to book a flight from United Kingdom to San Juan right now. Can momondo alert me if prices change?
If you are simply researching potential flights to San Juan, momondo offers a useful price alert feature which will track prices for flights to San Juan from United Kingdom and alert you when they change.