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Cheap flights from London Gatwick Airport to San Juan from £346

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 21/4. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — SJU
20 Dec — 27 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Gatwick to San Juan

Enter your travel dates to find the best prices.

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 20 November 2025.

Fri 5/1210:45LGW - SJU
2 stops33h 28mMultiple Airlines
Thu 11/1203:55SJU - LGW
1 stop26h 05mMultiple Airlines
Deal found 19/11£578
Thu 27/1114:00LGW - SJU
1 stop16h 54mMultiple Airlines
Thu 4/1209:15SJU - LGW
2 stops21h 40mMultiple Airlines
Deal found 18/11£590
Fri 28/1114:00LGW - SJU
1 stop16h 54mMultiple Airlines
Fri 12/1204:10SJU - LGW
2 stops25h 55mMultiple Airlines
Deal found 18/11£602
Fri 28/1114:00LGW - SJU
2 stops37h 29mMultiple Airlines
Thu 11/1203:55SJU - LGW
1 stop26h 05mMultiple Airlines
Deal found 19/11£603

Cheap flight deals from Gatwick to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Gatwick (LGW) to San Juan (PR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 20 November 2025.

Round-trip from

£556

One-way from

£346

Popular in

December

Cheapest in

March

Average price

£688
8/1-18/1
  • 8/1-18/1
  • 3 total stops
  • 48h 29m total
  • London to San Juan
Search Deals
21/4
  • 21/4
  • 2 total stops
  • 44h 15m total
  • London to San Juan
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£60 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£38 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Gatwick 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 20 November 2025.
Use the filters below to find and compare flights from London Gatwick Airport to San Juan that are best for you.

Fly from

Gatwick

Fly to

San Juan

Route

Depart

Return

Price

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Mon 12/1

11:55-15:35

3 stops31h 40m

San Juan Luis Munoz Marin Intl

Fri 16/1

10:52-10:55

2 stops20h 03m

£571

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Fri 9/1

14:00-09:47

1 stop23h 47m

San Juan Luis Munoz Marin Intl

Sun 18/1

07:15-06:00

1 stop18h 45m

£584

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Thu 8/1

11:55-03:13

2 stops19h 18m

San Juan Luis Munoz Marin Intl

Sun 18/1

07:15-10:55

2 stops23h 40m

£594

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Fri 27/2

14:00-09:47

1 stop23h 47m

San Juan Luis Munoz Marin Intl

Sat 7/3

06:00-09:50

3 stops23h 50m

£597

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sat 14/2

11:40-14:00

1 stop30h 20m

San Juan Luis Munoz Marin Intl

Tue 24/2

08:40-06:00

1 stop17h 20m

£625

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Mon 26/1

11:00-13:48

2 stops30h 48m

San Juan Luis Munoz Marin Intl

Thu 5/2

11:15-15:50

2 stops24h 35m

£639

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sat 31/1

17:25-17:05

2 stops27h 40m

San Juan Luis Munoz Marin Intl

Sun 1/2

19:50-10:00

2 stops34h 10m

£657

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Thu 4/12

10:40-04:20

2 stops21h 40m

San Juan Luis Munoz Marin Intl

Mon 8/12

06:10-09:50

2 stops23h 40m

£661

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sun 4/1

19:40-08:05

2 stops40h 25m

San Juan Luis Munoz Marin Intl

Mon 12/1

11:45-06:00

1 stop14h 15m

£700

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 21/4

20:40-11:55

2 stops44h 15m

£346

Flights are sorted by cheapest return flights first.

Deals found on 19/11

Showing 1-10 of 18 results
1
2

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?

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 20 November 2025.

It’s optimal to fly from London Gatwick Airport to San Juan in the evening. By choosing this option you can save up to 56% on the cost of your flight, compared to a flight at midday.

How much does it cost for a return flight from London Gatwick Airport to San Juan?

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 20 November 2025.
See what other customers who have flown with 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.
Iberia
7.0
Good
3,027 reviews
Check prices

Boarding

7.1

Food

6.3

Overall

7.0

Entertainment

6.6

Crew

7.7

Comfort

6.7

Reviews

1 / 20
2.0
Mediocre

Jason,Jan 2025

LHR - AUS

You owe me a flight. This trip was canceled and I got to the airport just to find out. Cheapflights did not book me another flight and left me hanging at the airport. I had to purchase a new ticket for double the price because of your company. What a shame and if nothing gets resolved I am going to file a lawsuit to get my compensation.
Iberia
7.0
Good
3,027 reviews
Iberia
7.0
Good
3,027 reviews
Check prices

Boarding

7.1

Food

6.3

Overall

7.0

Entertainment

6.6

Crew

7.7

Comfort

6.7

Reviews

1 / 20
2.0
Mediocre

Jason,Jan 2025

LHR - AUS

You owe me a flight. This trip was canceled and I got to the airport just to find out. Cheapflights did not book me another flight and left me hanging at the airport. I had to purchase a new ticket for double the price because of your company. What a shame and if nothing gets resolved I am going to file a lawsuit to get my compensation.

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 is the cheapest airline to fly 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 £530 on this airline. This flight start at 33% 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.

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 airline flying from Gatwick to San Juan

Discover the top airline that operate flights from Gatwick 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 20 November 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest£530Average£953FlexibilityNo cancel feeOn-time77%
Search Iberia 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 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.

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