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Cheap flights from London Stansted Airport to San Juan from £321

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 29/10. Fares are subject to change and may not be available on all flights or dates of travel.
STN — SJU
24 Aug — 31 Aug1
1 adult

Cheap flight deals from Stansted to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Stansted (STN) 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 19 August 2025.

Round-trip from

£616

One-way from

£321

Popular in

July

Cheapest in

September

Average price

£767
1/10-7/10
  • 1/10-7/10
  • 6 total stops
  • 55h 15m total
  • London to San Juan
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29/10
  • 29/10
  • 3 total stops
  • 44h 31m total
  • London to San Juan
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£75 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£19 potential savings vs. average return price).
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Average for round-trip flights in August 2025
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Find flight deals from Stansted to San Juan

Cheapest flights from Stansted to San Juan
Explore the most affordable flight options available from Stansted to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 August 2025.

Wed 1/1011:40STN - SJU
3 stops28h 24mMultiple Airlines
Tue 7/1002:49SJU - STN
3 stops26h 51mMultiple Airlines
Deal found 17/8£616
Fri 3/1006:15STN - SJU
1 stop17h 15mMultiple Airlines
Fri 10/1020:20SJU - STN
1 stop19h 45mMultiple Airlines
Deal found 19/8£771
Tue 9/916:15STN - SJU
3 stops29h 35mMultiple Airlines
Fri 12/906:44SJU - STN
3 stops22h 56mMultiple Airlines
Deal found 17/8£820
Sat 1/1114:30STN - SJU
2 stops30h 35mMultiple Airlines
Mon 1/1216:45SJU - STN
3 stops27h 10mMultiple Airlines
Deal found 18/8£922
Fri 21/1106:50STN - SJU
2 stops21h 28mMultiple Airlines
Fri 28/1121:25SJU - STN
1 stop12h 40mMultiple Airlines
Deal found 18/8£932
Sat 13/1220:10STN - SJU
1 stop24h 25mMultiple Airlines
Sat 20/1213:00SJU - STN
2 stops18h 30mMultiple Airlines
Deal found 19/8£994
Wed 3/1205:55STN - SJU
1 stop14h 40mMultiple Airlines
Sat 13/1221:25SJU - STN
1 stop13h 05mMultiple Airlines
Deal found 18/8£1,051

Cheapflights Fare Finder

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

Fly from

Stansted

Fly to

San Juan

Route

Depart

Return

Price

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Wed 1/10

11:40-11:04

3 stops28h 24m

San Juan Luis Munoz Marin Intl

Tue 7/10

02:49-10:40

3 stops26h 51m

£616

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Fri 3/10

06:15-18:30

1 stop17h 15m

San Juan Luis Munoz Marin Intl

Fri 10/10

20:20-21:05

1 stop19h 45m

£771

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Tue 9/9

16:15-16:50

3 stops29h 35m

San Juan Luis Munoz Marin Intl

Fri 12/9

06:44-10:40

3 stops22h 56m

£820

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Sun 1/2

08:55-19:55

1 stop15h 00m

San Juan Luis Munoz Marin Intl

Sun 15/2

21:25-16:15

1 stop14h 50m

£824

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Fri 16/1

07:55-19:55

1 stop16h 00m

San Juan Luis Munoz Marin Intl

Fri 30/1

21:25-14:05

1 stop12h 40m

£834

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Fri 30/1

16:20-11:35

2 stops23h 15m

San Juan Luis Munoz Marin Intl

Sun 8/2

21:25-14:00

1 stop12h 35m

£874

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Sat 1/11

14:30-17:05

2 stops30h 35m

San Juan Luis Munoz Marin Intl

Mon 1/12

16:45-23:55

3 stops27h 10m

£922

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Fri 21/11

06:50-00:18

2 stops21h 28m

San Juan Luis Munoz Marin Intl

Fri 28/11

21:25-14:05

1 stop12h 40m

£932

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Wed 29/10

08:05-00:36

3 stops44h 31m

£321

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Mon 10/11

12:00-19:21

3 stops35h 21m

£351

Flights are sorted by cheapest return flights first.

Deals found on 17/8

Showing 1-10 of 15 results
1
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Best time to book a flight from Stansted to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Stansted 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 Stansted Airport to San Juan
No data available for this route at this time. Please check back soon.

Related info for your journey

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

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Stansted 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 Stansted Airport to San Juan?

    Currently, April is the cheapest month in which you can book a flight from London Stansted Airport to San Juan (average of £631). Flying from London Stansted 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.

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Can Cheapflights notify me if prices for flights from Stansted 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 Stansted today and book when prices fit your budget.

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