Find flights
When to book
Airlines
FAQs

Cheap flights from the United Kingdom to San Juan from £264

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 17/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
21 Mar — 28 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to San Juan

Enter your travel dates to find the best prices.

Cheapest flights from United Kingdom to San Juan
Explore the most affordable flight options available from United Kingdom to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 February 2026.

Sat 7/308:05
LHR
-
SJU
1 stop23h 44m
JetBlue
Tue 17/317:40
SJU
-
LHR
1 stop24h 00m
JetBlue
Deal found 15/2£406
Thu 26/209:20
LHR
-
SJU
1 stop18h 29m
JetBlue
Mon 2/314:25
SJU
-
LHR
1 stop12h 30m
JetBlue
Deal found 18/2£411
Sun 1/307:45
LHR
-
SJU
1 stop20h 44m
JetBlue
Tue 10/305:26
SJU
-
LHR
1 stop12h 14m
JetBlue
Deal found 18/2£412
Sun 1/309:20
LHR
-
SJU
1 stop16h 36m
JetBlue
Wed 4/323:59
SJU
-
LHR
1 stop17h 41m
JetBlue
Deal found 16/2£414
Mon 2/308:05
LHR
-
SJU
1 stop15h 48m
JetBlue
Mon 9/305:15
SJU
-
LHR
1 stop21h 40m
JetBlue
Deal found 18/2£415
Thu 26/207:25
LHR
-
SJU
1 stop24h 26m
JetBlue
Wed 4/314:25
SJU
-
LHR
1 stop12h 30m
JetBlue
Deal found 17/2£416
Sun 1/307:45
LHR
-
SJU
1 stop20h 44m
JetBlue
Sat 14/303:26
SJU
-
LHR
1 stop26h 04m
JetBlue
Deal found 16/2£425
Thu 26/209:20
LHR
-
SJU
1 stop17h 28m
JetBlue
Wed 11/311:10
SJU
-
LHR
1 stop15h 45m
JetBlue
Deal found 18/2£430
Thu 26/209:20
LHR
-
SJU
1 stop17h 28m
JetBlue
Tue 3/310:55
SJU
-
LHR
1 stop18h 35m
JetBlue
Deal found 17/2£432
Thu 26/211:55
LGW
-
SJU
2 stops17h 13m
Multiple Airlines
Wed 4/311:22
SJU
-
LGW
2 stops19h 33m
Multiple Airlines
Deal found 17/2£478
Tue 24/307:20
LGW
-
SJU
2 stops37h 45m
Multiple Airlines
Mon 30/303:08
SJU
-
LGW
1 stop25h 52m
Multiple Airlines
Deal found 17/2£516
Tue 10/311:55
LGW
-
SJU
2 stops35h 11m
Multiple Airlines
Wed 18/310:00
SJU
-
LGW
2 stops20h 55m
Multiple Airlines
Deal found 17/2£517

Find flight deals from United Kingdom to San Juan

Keep the following information in mind while searching for United Kingdom to San Juan flight deals. Data was last updated 19 February 2026.

Round-trip from

£406

One-way from

£264

Popular in

July

Cheapest in

September

Average price

£542
JetBlue
  • JetBlue
  • 7/3-17/3
  • 2 total stops
  • 47h 44m total
  • United Kingdom to San Juan
Search Deals
17/4
  • 17/4
  • 3 total stops
  • 45h 31m total
  • United Kingdom to San Juan
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£67 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from United Kingdom 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 February 2026.
Use the filters below to find and compare flights from the United Kingdom to San Juan that are best for you.

Fly from

United Kingdom

Fly to

San Juan

Route

Depart

Return

Price

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sun 1/3

07:45-00:29

1 stop20h 44m

San Juan Luis Munoz Marin Intl

Tue 10/3

05:26-21:40

1 stop12h 14m

£412

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 7/3

08:05-23:44

1 stop19h 39m

San Juan Luis Munoz Marin Intl

Tue 17/3

03:26-21:40

1 stop14h 14m

£430

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 18/3

12:20-01:25

1 stop17h 05m

San Juan Luis Munoz Marin Intl

Thu 2/4

11:50-06:30

1 stop13h 40m

£524

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 18/3

12:20-22:51

1 stop14h 31m

San Juan Luis Munoz Marin Intl

Tue 7/4

12:55-06:30

1 stop12h 35m

£524

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Mon 2/3

14:00-10:17

1 stop24h 17m

San Juan Luis Munoz Marin Intl

Mon 9/3

05:00-10:00

1 stop25h 00m

£526

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Sat 7/3

14:40-17:05

2 stops30h 25m

San Juan Luis Munoz Marin Intl

Wed 18/3

10:00-22:15

3 stops32h 15m

£554

ManchesterSan Juan

MAN - SJU

MANSJU

Manchester

Fri 13/3

10:40-16:09

2 stops33h 29m

San Juan Luis Munoz Marin Intl

Fri 20/3

12:22-06:10

1 stop13h 48m

£556

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Sun 1/3

07:40-15:20

2 stops35h 40m

San Juan Luis Munoz Marin Intl

Wed 22/4

12:30-22:05

3 stops28h 35m

£559

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Sun 1/3

07:40-15:20

2 stops35h 40m

San Juan Luis Munoz Marin Intl

Tue 10/3

10:22-22:55

3 stops32h 33m

£563

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 8/4

08:15-22:57

1 stop19h 42m

San Juan Luis Munoz Marin Intl

Sun 19/4

19:58-20:45

1 stop19h 47m

£576

Flights are sorted by cheapest return flights first.

Deals found on 18/2

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from United Kingdom to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from United Kingdom 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.

Cheapflights Insights

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

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

Currently, July is the cheapest month in which you can book a flight from United Kingdom to San Juan (average of £392). Flying from United Kingdom to San Juan in December is currently the most expensive (average of £537). 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

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 February 2026.
Read through reviews of airlines operating flights from the United Kingdom to San Juan, such as Finnair, Virgin Atlantic, andJetBlue. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,364 reviews
Check prices

Comfort

7.4

Entertainment

6.9

Food

6.7

Overall

7.6

Boarding

7.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Finnair
7.6
Good
1,364 reviews
Finnair
7.6
Good
1,364 reviews
Check prices

Comfort

7.4

Entertainment

6.9

Food

6.7

Overall

7.6

Boarding

7.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Virgin Atlantic
7.5
Good
679 reviews
Finnair
7.6
Good
1,364 reviews
Check prices

Comfort

7.4

Entertainment

6.9

Food

6.7

Overall

7.6

Boarding

7.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
JetBlue
7.2
Good
2,901 reviews
Finnair
7.6
Good
1,364 reviews
Check prices

Comfort

7.4

Entertainment

6.9

Food

6.7

Overall

7.6

Boarding

7.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Icelandair
7.1
Good
615 reviews
Finnair
7.6
Good
1,364 reviews
Check prices

Comfort

7.4

Entertainment

6.9

Food

6.7

Overall

7.6

Boarding

7.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Iberia
7.0
Good
3,118 reviews
Finnair
7.6
Good
1,364 reviews
Check prices

Comfort

7.4

Entertainment

6.9

Food

6.7

Overall

7.6

Boarding

7.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

Related info for your journey

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

  • How long is the flight from United Kingdom to San Juan?

    Airlines like JetBlue, Icelandair, and Aer Lingus fly from United Kingdom to San Juan in about 17h 30m. The time it takes to get you to your destination can typically vary by up to 8h 25m. The distance between United Kingdom and San Juan is about 4123 mi. Both multi-stop and direct flights can be found to your destination and back.

  • 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, July is the cheapest month in which you can book a flight from United Kingdom to San Juan (average of £392). Flying from United Kingdom to San Juan in December is currently the most expensive (average of £537). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 7 airlines flying from United Kingdom to San Juan

Discover the top 7 airlines that operate flights from United Kingdom 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 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£341Average£1,041FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
JetBlueCheapest£404Average£604FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
FinnairCheapest£427Average£574FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IcelandairCheapest£500Average£736FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£534Average£960FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IberiaCheapest£550Average£913FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Aer LingusCheapest£650Average£789FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus 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 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.