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Cheap flights from the United Kingdom to San Juan from £248

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 26/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
30 Jan — 6 Feb1
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 31 December 2025.

Tue 30/1209:20LHR - SJU
1 stop18h 36mJetBlue
Thu 8/114:00SJU - LHR
1 stop12h 55mJetBlue
Deal found 29/12£793
Tue 30/1212:20LHR - SJU
1 stop34h 29mJetBlue
Sat 10/106:05SJU - LHR
1 stop34h 40mJetBlue
Deal found 30/12£817
Tue 30/1206:00LHR - SJU
2 stops23h 05mTAP AIR PORTUGAL
Sat 10/115:56SJU - LHR
2 stops19h 34mTAP AIR PORTUGAL
Deal found 29/12£1,213
Tue 30/1218:45LHR - SJU
1 stop26h 30mIberia
Thu 8/106:00SJU - LHR
1 stop26h 20mIberia
Deal found 30/12£1,304
Tue 30/1220:00LHR - SJU
2 stops29h 09mMultiple Airlines
Thu 8/114:15SJU - LHR
1 stop13h 50mMultiple Airlines
Deal found 30/12£1,326
Tue 30/1215:50LHR - SJU
1 stop24h 06mDelta
Thu 8/107:30SJU - LHR
2 stops19h 25mDelta
Deal found 29/12£1,330
Tue 30/1211:25LHR - SJU
1 stop12h 30mIberia
Sat 10/111:38SJU - LHR
2 stops16h 12mIberia
Deal found 30/12£1,350
Tue 30/1216:35LHR - SJU
2 stops24h 22mDelta
Sat 10/107:30SJU - LHR
2 stops20h 35mDelta
Deal found 30/12£1,435
Tue 30/1219:40LGW - SJU
1 stop24h 55mMultiple Airlines
Sat 10/121:25SJU - LGW
1 stop33h 25mMultiple Airlines
Deal found 29/12£1,460
Tue 30/1209:00LHR - SJU
2 stops33h 40mAir Canada
Wed 7/102:05SJU - LHR
2 stops24h 25mAir Canada
Deal found 29/12£1,490
Tue 30/1211:55LGW - SJU
2 stops17h 10mIcelandair
Sat 10/108:00SJU - LGW
2 stops22h 55mIcelandair
Deal found 29/12£1,595
Tue 30/1211:55LGW - SJU
2 stops17h 10mIcelandair
Thu 8/114:00SJU - LGW
2 stops16h 55mIcelandair
Deal found 29/12£1,690

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 31 December 2025.

Round-trip from

£488

One-way from

£248

Popular in

December

Cheapest in

September

Average price

£949
4/3-10/3
  • 4/3-10/3
  • 3 total stops
  • 55h 50m total
  • United Kingdom to San Juan
Search Deals
26/1
  • 26/1
  • 1 total stop
  • 29h 26m total
  • United Kingdom to San Juan
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£28 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 31 December 2025.
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

ManchesterSan Juan

MAN - SJU

MANSJU

Manchester

Fri 8/5

18:20-16:50

2 stops27h 30m

San Juan Luis Munoz Marin Intl

Sat 16/5

17:40-08:15

1 stop33h 35m

£491

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 12/3

07:25-22:51

1 stop19h 26m

San Juan Luis Munoz Marin Intl

Wed 25/3

05:10-06:55

1 stop21h 45m

£508

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 31/1

08:05-19:26

1 stop15h 21m

San Juan Luis Munoz Marin Intl

Sun 8/2

09:25-09:30

1 stop20h 05m

£511

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sun 8/3

09:20-20:56

1 stop15h 36m

San Juan Luis Munoz Marin Intl

Wed 11/3

04:15-21:40

1 stop13h 25m

£538

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 7/3

08:05-23:44

1 stop19h 39m

San Juan Luis Munoz Marin Intl

Wed 11/3

03:26-21:40

1 stop14h 14m

£549

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 6/3

09:20-21:56

1 stop16h 36m

San Juan Luis Munoz Marin Intl

Wed 11/3

04:15-21:40

1 stop13h 25m

£549

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sat 7/2

11:55-15:35

3 stops31h 40m

San Juan Luis Munoz Marin Intl

Sat 14/2

12:32-10:55

2 stops18h 23m

£567

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sun 25/1

10:00-17:05

2 stops35h 05m

San Juan Luis Munoz Marin Intl

Thu 29/1

11:52-19:25

2 stops27h 33m

£568

ManchesterSan Juan

MAN - SJU

MANSJU

Manchester

Thu 5/3

08:30-19:55

1 stop15h 25m

San Juan Luis Munoz Marin Intl

Thu 12/3

21:25-21:15

1 stop19h 50m

£579

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Fri 17/4

13:05-00:07

1 stop16h 02m

San Juan Luis Munoz Marin Intl

Tue 21/4

06:25-06:20

1 stop18h 55m

£581

Flights are sorted by cheapest return flights first.

Deals found on 30/12

Showing 1-10 of 60 results
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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, June is the cheapest month in which you can book a flight from United Kingdom to San Juan (average of £436). Flying from United Kingdom to San Juan in December is currently the most expensive (average of £542). 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 31 December 2025.
Read through reviews of airlines operating flights from the United Kingdom to San Juan, such as Finnair, JetBlue, andIcelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,343 reviews
Check prices

Food

6.7

Comfort

7.4

Boarding

7.6

Crew

8.1

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Finnair
7.6
Good
1,343 reviews
Finnair
7.6
Good
1,343 reviews
Check prices

Food

6.7

Comfort

7.4

Boarding

7.6

Crew

8.1

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
JetBlue
7.2
Good
2,903 reviews
Finnair
7.6
Good
1,343 reviews
Check prices

Food

6.7

Comfort

7.4

Boarding

7.6

Crew

8.1

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Icelandair
7.1
Good
593 reviews
Finnair
7.6
Good
1,343 reviews
Check prices

Food

6.7

Comfort

7.4

Boarding

7.6

Crew

8.1

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Iberia
7.0
Good
3,058 reviews
Finnair
7.6
Good
1,343 reviews
Check prices

Food

6.7

Comfort

7.4

Boarding

7.6

Crew

8.1

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
British Airways
6.7
Okay
7,631 reviews
Finnair
7.6
Good
1,343 reviews
Check prices

Food

6.7

Comfort

7.4

Boarding

7.6

Crew

8.1

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.

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 Lufthansa fly from United Kingdom to San Juan in about 17h 50m. The time it takes to get you to your destination can typically vary by up to 1h 36m. The distance between United Kingdom and San Juan is about 4073 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 City - 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, June is the cheapest month in which you can book a flight from United Kingdom to San Juan (average of £436). Flying from United Kingdom to San Juan in December is currently the most expensive (average of £542). 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 8 airlines flying from United Kingdom to San Juan

Discover the top 8 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 31 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£342Average£991FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
JetBlueCheapest£436Average£599FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
FinnairCheapest£447Average£573FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IcelandairCheapest£483Average£768FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£499Average£887FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£536Average£959FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£653Average£813FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
KLMCheapest£862Average£963FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

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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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