What are the cheapest airlines flying from London Gatwick Airport to San Juan round-trip?

Our cheapest airline available from London Gatwick Airport to San Juan is Iberia. Our recent data shows that you can find tickets from as low as £509 on this airline. An additional option worth looking into is Icelandair, starting at £628. These flights start at 38% lower than the current average price 3 months from now.

What is the cheapest month to book a flight from London Gatwick Airport to San Juan?

Currently, April is the cheapest month in which you can book a flight from London Gatwick Airport to San Juan (average of £631). Flying from London Gatwick Airport to San Juan in July is currently the most expensive (average of £1,027). 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.

What is the cheapest day to fly from London Gatwick Airport to San Juan?

Travellers seeking maximum savings on their London Gatwick Airport to San Juan flight should consider departing on Tuesday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in San Juan ranges from 55.0 - 156.0 inches per month. November is typically the wettest month, when rainfall can reach 156.0 mm. March is typically the driest time to visit San Juan when rainfall is around 55.0 mm.

If weather is an important factor for your trip to San Juan, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 28.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 25.0 C).

Can I find deals for flights from Gatwick to San Juan that include hotel bookings?

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

How can I find direct flights from Gatwick to San Juan?

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

Can I find deals for business class flights from Gatwick to San Juan?

Yes. Cheapflights offers flight deals from Gatwick 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.

£344+ Cheap Flights from London Gatwick Airport to San Juan

Cheap flight deals from Gatwick to San Juan

Round-trip from	£492
One-way from	£344
Popular in	August
Cheapest in	March
Average price	£640

1/10-5/10
3 total stops
40h 24m total
London to San Juan

Search Deals

23/10
3 total stops
41h 21m total
London to San Juan

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£139 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 10% potential price decrease (£57 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from Gatwick to San Juan

Cheapest flights from Gatwick to San Juan
Explore the most affordable flight options available from Gatwick to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Wed 1/1013:05LGW - SJU

1 stop17h 53mMultiple Airlines

Sun 5/1002:49SJU - LGW

2 stops22h 31mMultiple Airlines

Deal found 16/9£492

Thu 2/1014:00LGW - SJU

1 stop15h 54mMultiple Airlines

Wed 8/1006:22SJU - LGW

1 stop18h 58mMultiple Airlines

Deal found 16/9£493

Tue 30/913:05LGW - SJU

1 stop25h 51mMultiple Airlines

Tue 7/1006:22SJU - LGW

1 stop18h 58mMultiple Airlines

Deal found 16/9£496

Mon 29/914:00LGW - SJU

1 stop29h 11mMultiple Airlines

Thu 9/1006:22SJU - LGW

1 stop18h 58mMultiple Airlines

Deal found 16/9£498

Tue 7/1014:00LGW - SJU

1 stop16h 44mMultiple Airlines

Wed 8/1006:22SJU - LGW

2 stops22h 38mMultiple Airlines

Deal found 16/9£498

Fri 3/1013:05LGW - SJU

1 stop17h 53mMultiple Airlines

Sun 5/1002:49SJU - LGW

2 stops22h 31mMultiple Airlines

Deal found 16/9£501

Mon 29/914:00LGW - SJU

1 stop29h 11mMultiple Airlines

Sat 4/1006:44SJU - LGW

2 stops18h 36mMultiple Airlines

Deal found 16/9£503

Tue 14/1019:50LGW - SJU

2 stops35h 12mMultiple Airlines

Tue 21/1006:22SJU - LGW

1 stop18h 58mMultiple Airlines

Deal found 16/9£506

Mon 29/914:00LGW - SJU

1 stop29h 11mMultiple Airlines

Mon 13/1009:00SJU - LGW

2 stops44h 00mMultiple Airlines

Deal found 16/9£507

Tue 30/913:05LGW - SJU

1 stop25h 51mMultiple Airlines

Wed 8/1006:22SJU - LGW

1 stop18h 58mMultiple Airlines

Deal found 16/9£508

Thu 2/1014:00LGW - SJU

1 stop15h 54mMultiple Airlines

Thu 9/1006:22SJU - LGW

1 stop18h 58mMultiple Airlines

Deal found 16/9£509

Best flights from Gatwick to San Juan
Discover carefully curated flight deals from Gatwick to San Juan that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 September 2025.

Thu 2/1014:00LGW - SJU

1 stop15h 54mMultiple Airlines

Thu 9/1006:22SJU - LGW

1 stop18h 58mMultiple Airlines

Deal found 16/9£509

Tue 30/913:05LGW - SJU

1 stop17h 53mMultiple Airlines

Thu 9/1006:22SJU - LGW

1 stop18h 58mMultiple Airlines

Deal found 16/9£510

Wed 8/1014:00LGW - SJU

1 stop16h 44mMultiple Airlines

Wed 15/1002:49SJU - LGW

2 stops22h 31mMultiple Airlines

Deal found 16/9£513

Fri 7/1114:00LGW - SJU

2 stops30h 23mMultiple Airlines

Mon 10/1106:00SJU - LGW

3 stops34h 35mMultiple Airlines

Deal found 17/9£524

Tue 30/913:05LGW - SJU

1 stop17h 53mMultiple Airlines

Sun 5/1002:49SJU - LGW

2 stops22h 31mMultiple Airlines

Deal found 16/9£534

Tue 7/1014:00LGW - SJU

1 stop16h 44mMultiple Airlines

Thu 16/1003:40SJU - LGW

2 stops21h 40mMultiple Airlines

Deal found 16/9£539

Mon 6/1014:00LGW - SJU

1 stop16h 44mMultiple Airlines

Thu 16/1003:40SJU - LGW

2 stops21h 40mMultiple Airlines

Deal found 16/9£546

Fri 3/1014:00LGW - SJU

1 stop17h 34mMultiple Airlines

Sat 4/1003:39SJU - LGW

2 stops21h 41mMultiple Airlines

Deal found 17/9£555

Thu 4/1214:00LGW - SJU

2 stops30h 23mMultiple Airlines

Mon 8/1206:00SJU - LGW

2 stops24h 00mMultiple Airlines

Deal found 17/9£558

Last-minute flights from Gatwick to San Juan
Discover last-minute flight deals from Gatwick to San Juan. Data last updated 18 September 2025 and is based on user searches.

Mon 29/914:00LGW - SJU

1 stop29h 11mMultiple Airlines

Thu 9/1006:22SJU - LGW

1 stop18h 58mMultiple Airlines

Deal found 16/9£498

Mon 29/914:00LGW - SJU

1 stop29h 11mMultiple Airlines

Sat 4/1006:44SJU - LGW

2 stops18h 36mMultiple Airlines

Deal found 16/9£503

Mon 29/914:00LGW - SJU

1 stop29h 11mMultiple Airlines

Mon 13/1009:00SJU - LGW

2 stops44h 00mMultiple Airlines

Deal found 16/9£507

Tue 30/913:05LGW - SJU

1 stop25h 51mMultiple Airlines

Tue 7/1006:22SJU - LGW

1 stop18h 58mMultiple Airlines

Deal found 16/9£496

Tue 30/913:05LGW - SJU

1 stop25h 51mMultiple Airlines

Wed 8/1006:22SJU - LGW

1 stop18h 58mMultiple Airlines

Deal found 16/9£508

Wed 1/1013:05LGW - SJU

1 stop17h 53mMultiple Airlines

Sun 5/1002:49SJU - LGW

2 stops22h 31mMultiple Airlines

Deal found 16/9£492

Thu 2/1014:00LGW - SJU

1 stop15h 54mMultiple Airlines

Sat 4/1021:26SJU - LGW

1 stop27h 54mMultiple Airlines

Deal found 16/9£493

Thu 2/1014:00LGW - SJU

1 stop15h 54mMultiple Airlines

Thu 9/1006:22SJU - LGW

1 stop18h 58mMultiple Airlines

Deal found 16/9£509

Fri 3/1013:05LGW - SJU

1 stop17h 53mMultiple Airlines

Sun 5/1002:49SJU - LGW

2 stops22h 31mMultiple Airlines

Deal found 16/9£501

Tue 7/1014:00LGW - SJU

1 stop16h 44mMultiple Airlines

Wed 8/1006:22SJU - LGW

2 stops22h 38mMultiple Airlines

Deal found 16/9£498

Tue 14/1019:50LGW - SJU

2 stops35h 12mMultiple Airlines

Tue 21/1006:22SJU - LGW

1 stop18h 58mMultiple Airlines

Deal found 16/9£506

One-way flights from Gatwick to San Juan
Search for one-way flight options from Gatwick to San Juan. Find affordable one-way fares based on user searches. Data last updated 18 September 2025.

Thu 23/1014:30LGW - SJU

3 stops41h 21mMultiple Airlines

Deal found 16/9£344

Wed 22/1007:00LGW - SJU

3 stops24h 02mMultiple Airlines

Deal found 15/9£370

Sat 18/1018:40LGW - SJU

3 stops54h 16mMultiple Airlines

Deal found 17/9£391

Sat 22/1110:10LGW - SJU

3 stops51h 42mMultiple Airlines

Deal found 17/9£396

Sat 27/1207:10LGW - SJU

3 stops34h 59mMultiple Airlines

Deal found 16/9£541

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Gatwick Airport to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Thu 2/10

14:00-00:54

1 stop15h 54m

San Juan Luis Munoz Marin Intl

Thu 9/10

06:22-06:20

1 stop18h 58m

£509

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 30/9

13:05-01:58

1 stop17h 53m

San Juan Luis Munoz Marin Intl

Thu 9/10

06:22-06:20

1 stop18h 58m

£510

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Wed 8/10

14:00-01:44

1 stop16h 44m

San Juan Luis Munoz Marin Intl

Wed 15/10

02:49-06:20

2 stops22h 31m

£513

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Fri 7/11

14:00-16:23

2 stops30h 23m

San Juan Luis Munoz Marin Intl

Mon 10/11

06:00-20:35

3 stops34h 35m

£524

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 30/9

13:05-01:58

1 stop17h 53m

San Juan Luis Munoz Marin Intl

Sun 5/10

02:49-06:20

2 stops22h 31m

£534

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 7/10

14:00-01:44

1 stop16h 44m

San Juan Luis Munoz Marin Intl

Thu 16/10

03:40-06:20

2 stops21h 40m

£539

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Mon 6/10

14:00-01:44

1 stop16h 44m

San Juan Luis Munoz Marin Intl

Thu 16/10

03:40-06:20

2 stops21h 40m

£546

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Fri 3/10

14:00-02:34

1 stop17h 34m

San Juan Luis Munoz Marin Intl

Sat 4/10

03:39-06:20

2 stops21h 41m

£555

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Thu 4/12

14:00-16:23

2 stops30h 23m

San Juan Luis Munoz Marin Intl

Mon 8/12

06:00-10:00

2 stops24h 00m

£558

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Thu 23/10

14:30-02:51

3 stops41h 21m

£344

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 14 results

Best time to book a flight from Gatwick to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Gatwick 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 London Gatwick Airport to San Juan

What is the cheapest time of day to fly from LGW to SJU?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Gatwick Airport to San Juan as you normally would.

Reviews of airlines servicing San Juan

See what other customers who have flown with Icelandair and Iberia from London Gatwick Airport to San Juan have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Icelandair

7.0

Good

545 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Aug 2025

GVA - KEF

Terrible customer service when dealing with phone representatives. Baggage was lost.

Icelandair

7.0

Good

545 reviews

Icelandair

7.0

Good

545 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Aug 2025

GVA - KEF

Terrible customer service when dealing with phone representatives. Baggage was lost.

Iberia

7.0

Good

2,925 reviews

Icelandair

7.0

Good

545 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Aug 2025

GVA - KEF

Terrible customer service when dealing with phone representatives. Baggage was lost.

Related info for your journey

What are the cheapest airlines flying from London Gatwick Airport to San Juan round-trip?
Our cheapest airline available from London Gatwick Airport to San Juan is Iberia. Our recent data shows that you can find tickets from as low as £509 on this airline. An additional option worth looking into is Icelandair, starting at £628. These flights start at 38% lower than the current average price 3 months from now.
Can I find deals for flights from Gatwick to San Juan that include hotel bookings?
Yes. In addition to deals on Gatwick to San Juan flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Gatwick to San Juan?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Gatwick to San Juan.
Can I find deals for business class flights from Gatwick to San Juan?
Yes. Cheapflights offers flight deals from Gatwick 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 London Gatwick Airport to San Juan?
Currently, April is the cheapest month in which you can book a flight from London Gatwick Airport to San Juan (average of £631). Flying from London Gatwick Airport to San Juan in July is currently the most expensive (average of £1,027). 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

Alternative routes for Gatwick to San Juan

Heathrow to Luis Munoz Marin Intl flights

Gatwick to Luis Munoz Marin Intl flights

London City to Luis Munoz Marin Intl flights

Stansted to Luis Munoz Marin Intl flights

Heathrow to Aguadilla flights

Complete your trip

San Juan car hire

San Juan Luis Munoz Marin Intl Airport car hire

Ponce Mercedita Airport car hire

San Juan Isla Grande Airport car hire

Vieques Airport car hire

Condado car hire

Santurce car hire

San Juan Antiguo car hire

Hato Rey Sur car hire

Hato Rey Norte car hire

Gobernador Piñero car hire

Hato Rey Central car hire

Top 2 airlines flying from Gatwick to San Juan

Airline	Cheapest	Average	Flexibility	On-time
Iberia	Cheapest£509	Average£880	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Icelandair	Cheapest£628	Average£710	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights

Fly with Cheapflights

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

When you search for this flight from Gatwick to San Juan, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights simply makes it quick and affordable to book flights from Gatwick to San Juan by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

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

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to San Juan from Gatwick today and book when prices fit your budget.

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.

Cheap flights from London Gatwick Airport to San Juan from £344

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 23/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Gatwick to San Juan

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Gatwick to San Juan

Cheapest flights from Gatwick to San JuanExplore the most affordable flight options available from Gatwick to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Explore the most affordable flight options available from Gatwick to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Gatwick Airport to San Juan that are best for you.

Best time to book a flight from Gatwick to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Gatwick with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London Gatwick Airport to San Juan

What is the cheapest time of day to fly from LGW to SJU?

Find hourly flight availability from Gatwick to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 September 2025.

Reviews of airlines servicing San Juan

See what other customers who have flown with Icelandair and Iberia from London Gatwick Airport to San Juan have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What are the cheapest airlines flying from London Gatwick Airport to San Juan round-trip?

Can I find deals for flights from Gatwick to San Juan that include hotel bookings?

How can I find direct flights from Gatwick to San Juan?

Can I find deals for business class flights from Gatwick to San Juan?

What is the cheapest month to book a flight from London Gatwick Airport to San Juan?

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.

Alternative routes for Gatwick to San Juan

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Gatwick to San Juan

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 Gatwick to San Juan?

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

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

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

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Gatwick to San Juan
Explore the most affordable flight options available from Gatwick to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.