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Cheap flights from London Stansted Airport to San Juan from £268

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 18/4. Fares are subject to change and may not be available on all flights or dates of travel.
STN — SJU
29 Mar — 5 Apr1
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 27 February 2026.

Fri 10/407:35
STN
-
SJU
3 stops21h 23m
Multiple Airlines
Fri 17/412:30
SJU
-
STN
3 stops27h 00m
Multiple Airlines
Deal found 24/2£601
Mon 14/905:50
STN
-
SJU
1 stop14h 35m
Multiple Airlines
Sun 27/906:00
SJU
-
STN
2 stops22h 50m
Multiple Airlines
Deal found 24/2£625
Tue 17/307:40
STN
-
SJU
3 stops44h 18m
Multiple Airlines
Tue 24/310:00
SJU
-
STN
3 stops33h 50m
Multiple Airlines
Deal found 26/2£627
Mon 13/405:50
STN
-
SJU
2 stops31h 15m
Multiple Airlines
Mon 20/410:25
SJU
-
STN
3 stops31h 25m
Multiple Airlines
Deal found 27/2£642
Sat 12/919:50
STN
-
SJU
1 stop24h 35m
Multiple Airlines
Wed 23/906:00
SJU
-
STN
2 stops20h 50m
Multiple Airlines
Deal found 25/2£654
Sat 21/1120:10
STN
-
SJU
1 stop24h 30m
Multiple Airlines
Sun 29/1118:10
SJU
-
STN
1 stop13h 20m
Multiple Airlines
Deal found 25/2£674
Wed 9/921:30
STN
-
SJU
1 stop22h 55m
Multiple Airlines
Thu 17/914:25
SJU
-
STN
2 stops19h 10m
Multiple Airlines
Deal found 25/2£678
Thu 23/410:00
STN
-
SJU
1 stop14h 05m
Multiple Airlines
Sun 3/511:30
SJU
-
STN
2 stops39h 00m
Multiple Airlines
Deal found 26/2£693
Tue 8/1208:10
STN
-
SJU
1 stop15h 50m
Multiple Airlines
Tue 15/1218:10
SJU
-
STN
1 stop13h 20m
Multiple Airlines
Deal found 24/2£703
Sat 11/408:45
STN
-
SJU
2 stops34h 45m
Multiple Airlines
Mon 20/414:40
SJU
-
STN
3 stops21h 10m
Multiple Airlines
Deal found 25/2£717

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 27 February 2026.

Round-trip from

£601

One-way from

£268

Popular in

July

Cheapest in

September

Average price

£545
10/4-17/4
  • 10/4-17/4
  • 6 total stops
  • 48h 23m total
  • London to San Juan
Search Deals
18/4
  • 18/4
  • 3 total stops
  • 36h 41m total
  • London to San Juan
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£68 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 27 February 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

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Thu 21/5

06:00-19:05

1 stop18h 05m

San Juan Luis Munoz Marin Intl

Mon 25/5

15:20-18:30

2 stops22h 10m

£914

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Sat 2/5

17:45-18:30

2 stops29h 45m

San Juan Luis Munoz Marin Intl

Sat 16/5

12:00-16:40

2 stops23h 40m

£1,053

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Sat 18/4

17:45-18:31

2 stops29h 46m

San Juan Luis Munoz Marin Intl

Wed 22/4

17:30-22:10

2 stops23h 40m

£1,109

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Sat 16/5

10:50-10:18

2 stops28h 28m

San Juan Luis Munoz Marin Intl

Sat 23/5

06:00-09:55

2 stops22h 55m

£1,111

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Sun 5/7

17:35-11:55

2 stops23h 20m

San Juan Luis Munoz Marin Intl

Thu 16/7

05:10-09:55

2 stops23h 45m

£1,131

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Sat 2/5

17:45-18:30

2 stops29h 45m

San Juan Luis Munoz Marin Intl

Fri 8/5

06:25-09:55

2 stops22h 30m

£1,165

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Mon 11/5

10:50-10:18

2 stops28h 28m

San Juan Luis Munoz Marin Intl

Sat 23/5

06:00-09:55

2 stops22h 55m

£1,173

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Fri 1/5

17:35-02:07

2 stops37h 32m

San Juan Luis Munoz Marin Intl

Sat 9/5

06:25-09:55

2 stops22h 30m

£1,197

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Thu 5/3

06:30-17:20

3 stops38h 50m

£328

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Wed 15/4

07:45-17:59

2 stops39h 14m

£361

Flights are sorted by cheapest return flights first.

Deals found on 25/2

Showing 1-10 of 16 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.

  • 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.

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

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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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