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Cheap flights from the United Kingdom to San Juan

LHR — SJU
27 Oct — 3 Nov1
1 adult
1 adult, Economy, 0 bags

Find flight deals from United Kingdom to San Juan

Popular in

December

Cheapest in

February

Average price

£742
Highest demand for flights based on searches. 3% potential increase in price (£19 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£16 potential savings vs. average return price).
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Average for round-trip flights in September 2026
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Cheapflights Insights

Everything you need to know about your flight from the United Kingdom to San Juan

How far ahead should I book a flight from United Kingdom to San Juan?

Booking 39 days in advance of your planned departure date is, on average, the best time to get cheap flights from United Kingdom to San Juan. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from United Kingdom to San Juan?

Currently, February is the cheapest month in which you can book a flight from United Kingdom to San Juan (average of £542). Flying from United Kingdom to San Juan in December is currently the most expensive (average of £976). 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.

Reviews of airlines servicing San Juan

Read through reviews of airlines operating flights from the United Kingdom to San Juan, such as Aer Lingus,JetBlue, andIberia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,794 reviews
Check prices

Boarding

7.4

Entertainment

7.0

Comfort

7.2

Crew

8.1

Overall

7.3

Food

6.7

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Aer Lingus
7.3
Good
1,794 reviews
Aer Lingus
7.3
Good
1,794 reviews
Check prices

Boarding

7.4

Entertainment

7.0

Comfort

7.2

Crew

8.1

Overall

7.3

Food

6.7

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
JetBlue
7.1
Good
3,039 reviews
Aer Lingus
7.3
Good
1,794 reviews
Check prices

Boarding

7.4

Entertainment

7.0

Comfort

7.2

Crew

8.1

Overall

7.3

Food

6.7

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Iberia
7.0
Good
3,246 reviews
Aer Lingus
7.3
Good
1,794 reviews
Check prices

Boarding

7.4

Entertainment

7.0

Comfort

7.2

Crew

8.1

Overall

7.3

Food

6.7

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Icelandair
6.9
Okay
753 reviews
Aer Lingus
7.3
Good
1,794 reviews
Check prices

Boarding

7.4

Entertainment

7.0

Comfort

7.2

Crew

8.1

Overall

7.3

Food

6.7

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
British Airways
6.7
Okay
8,238 reviews
Aer Lingus
7.3
Good
1,794 reviews
Check prices

Boarding

7.4

Entertainment

7.0

Comfort

7.2

Crew

8.1

Overall

7.3

Food

6.7

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.

Related info for your journey

  • What are the most popular routes from United Kingdom to San Juan?

    While some choose either London Gatwick - San Juan Luis Munoz Marin Intl or London Stansted - San Juan Luis Munoz Marin Intl, London Heathrow - San Juan Luis Munoz Marin Intl is the most popular route from United Kingdom to San Juan.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from United Kingdom 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 United Kingdom to San Juan?

    Currently, February is the cheapest month in which you can book a flight from United Kingdom to San Juan (average of £542). Flying from United Kingdom to San Juan in December is currently the most expensive (average of £976). 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 6 airlines flying from United Kingdom to San Juan

AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£429Average£685FlexibilityNo cancel feeOn-time62%
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IcelandairCheapest£491Average£861FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£682Average£1,037FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IberiaCheapest£855Average£1,039FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£856Average£1,089FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£1,048Average£1,239FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from United Kingdom to San Juan. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights helps you find that perfect flight to San Juan from United Kingdom by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes! Cheapflights helps users easily find flights from United Kingdom to San Juan with no change fees.

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

Yes, Cheapflights offers price alerts on United Kingdom to San Juan flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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