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Cheap flights from London Stansted Airport to San Juan from £302

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 27/10. Fares are subject to change and may not be available on all flights or dates of travel.
STN — SJU
15 Sep — 22 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Stansted to San Juan

Enter your travel dates to find the best prices.

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 16 August 2026.

Sat 26/908:45 -
2 stops15h 45m
Fri 9/1020:25 -
1 stop29h 45m
Deal found 15/8£657
Thu 19/1106:20 -
1 stop14h 20m
Mon 30/1121:35 -
1 stop17h 50m
Deal found 14/8£673
Mon 16/1109:15 -
1 stop14h 45m
Thu 26/1121:35 -
1 stop18h 45m
Deal found 13/8£674
Fri 6/1106:00 -
1 stop14h 40m
Tue 10/1121:35 -
1 stop18h 00m
Deal found 14/8£686
Fri 20/1107:45 -
1 stop16h 15m
Mon 30/1121:35 -
1 stop17h 50m
Deal found 12/8£696
Tue 17/1110:25 -
1 stop13h 35m
Thu 26/1121:35 -
1 stop18h 45m
Deal found 12/8£705
Sat 24/1008:45 -
1 stop15h 00m
Sun 8/1121:35 -
1 stop30h 20m
Deal found 15/8£713
Mon 28/905:55 -
1 stop14h 30m
Tue 13/1017:15 -
1 stop13h 25m
Deal found 15/8£722

Find 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 16 August 2026.

Round-trip from

£657

One-way from

£302

Popular in

December

Cheapest in

February

Average price

£804
26/9-9/10
  • 26/9-9/10
  • 3 total stops
  • 45h 30m total
  • London to San Juan
Search Deals
27/10
  • 27/10
  • 3 total stops
  • 53h 44m total
  • London to San Juan
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£22 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

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 16 August 2026.
Use the filters below to find and compare flights from London Stansted Airport to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSan Juan

STN London Stansted - SJU San Juan Luis Munoz Marin Intl

STNSJU

London Stansted

Sat 24/10

19:50-20:00

1 stop29h 10m

San Juan Luis Munoz Marin Intl

Sun 8/11

21:35-23:00

2 stops21h 25m

£739

LondonSan Juan

STN London Stansted - SJU San Juan Luis Munoz Marin Intl

STNSJU

London Stansted

Mon 21/9

08:10-15:00

2 stops35h 50m

San Juan Luis Munoz Marin Intl

Sun 27/9

18:09-16:50

2 stops17h 41m

£790
Fastest return journey

LondonSan Juan

STN London Stansted - SJU San Juan Luis Munoz Marin Intl

STNSJU

London Stansted

Mon 28/9

05:55-15:25

1 stop14h 30m

San Juan Luis Munoz Marin Intl

Mon 5/10

17:15-12:05

1 stop13h 50m

£971

LondonSan Juan

STN London Stansted - SJU San Juan Luis Munoz Marin Intl

STNSJU

London Stansted

Fri 9/10

10:50-11:28

2 stops29h 38m

San Juan Luis Munoz Marin Intl

Mon 19/10

10:30-16:40

2 stops25h 10m

£1,018

LondonSan Juan

STN London Stansted - SJU San Juan Luis Munoz Marin Intl

STNSJU

London Stansted

Tue 2/2

17:20-19:26

2 stops30h 06m

San Juan Luis Munoz Marin Intl

Sun 7/2

08:15-09:55

2 stops21h 40m

£1,117

LondonSan Juan

STN London Stansted - SJU San Juan Luis Munoz Marin Intl

STNSJU

London Stansted

Fri 29/1

17:20-19:26

2 stops30h 06m

San Juan Luis Munoz Marin Intl

Sun 28/2

07:01-09:55

2 stops22h 54m

£1,118

LondonSan Juan

STN London Stansted - SJU San Juan Luis Munoz Marin Intl

STNSJU

London Stansted

Thu 7/1

10:55-13:20

2 stops30h 25m

San Juan Luis Munoz Marin Intl

Thu 21/1

08:15-09:55

2 stops21h 40m

£1,149
Cheapest one-way

LondonSan Juan

STN London Stansted - SJU San Juan Luis Munoz Marin Intl

STNSJU

London Stansted

Tue 15/9

15:10-02:13

3 stops40h 03m

£329

LondonSan Juan

STN London Stansted - SJU San Juan Luis Munoz Marin Intl

STNSJU

London Stansted

Mon 14/9

17:20-14:58

2 stops50h 38m

£345

LondonSan Juan

STN London Stansted - SJU San Juan Luis Munoz Marin Intl

STNSJU

London Stansted

Sun 24/1

20:45-17:05

2 stops24h 20m

£350

Flights are sorted by cheapest return flights first.

Deals found on 13/8

Showing 1-10 of 18 resultsSorted by cheapest first
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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.

  • How long is the flight from London Stansted Airport to San Juan?

    Departing from London Stansted Airport to San Juan will take you 29h 38m. London Stansted Airport and San Juan are separated by a distance of 4212 mi.

  • 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.

See more FAQs

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Stansted 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 Stansted to San Juan?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Stansted to San Juan.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Stansted to San Juan flexibly with Cheapflights today.

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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