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.

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).

How far in advance should I book a flight from London Stansted Airport to San Juan?

To save up to 58% on this flight, we recommend booking at least 57 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from London Stansted Airport to San Juan from £476 1-2 weeks out and tickets from £790 for flights departing within the next 72 hours.

What is the cheapest month to fly from London Stansted Airport to San Juan?

September can be a great time to fly to San Juan from London Stansted Airport with a flight ticket averaging about £665. Cheapflights users have found deals in the month of September for as cheap as £436. The most expensive prices can be found in the month of July.

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

When flying from London Stansted Airport to San Juan, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

£287+ Flights from London Stansted Airport to San Juan

Cheap flight deals from Stansted to San Juan

Round-trip from	£501
One-way from	£287
Popular in	July
Cheapest in	September
Average price	£537

12/2-17/2
2 total stops
35h 05m total
London to San Juan

Search Deals

5/2
2 total stops
32h 22m total
London to San Juan

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£71 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

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 15 September 2025.

Wed 5/1105:55STN - SJU

1 stop14h 40mMultiple Airlines

Fri 14/1118:17SJU - STN

2 stops21h 43mMultiple Airlines

Deal found 15/9£622

Sat 11/1011:40STN - SJU

3 stops28h 16mMultiple Airlines

Fri 17/1002:49SJU - STN

3 stops26h 51mMultiple Airlines

Deal found 13/9£664

Sat 8/1109:55STN - SJU

2 stops35h 59mMultiple Airlines

Thu 13/1121:40SJU - STN

1 stop12h 55mMultiple Airlines

Deal found 15/9£680

Tue 11/1120:25STN - SJU

1 stop24h 10mMultiple Airlines

Sat 22/1118:30SJU - STN

2 stops33h 10mMultiple Airlines

Deal found 14/9£699

Mon 27/1008:05STN - SJU

2 stops28h 20mMultiple Airlines

Mon 10/1121:40SJU - STN

1 stop12h 25mMultiple Airlines

Deal found 14/9£714

Tue 16/1207:40STN - SJU

2 stops31h 14mMultiple Airlines

Fri 16/121:25SJU - STN

1 stop12h 50mMultiple Airlines

Deal found 14/9£728

Wed 1/1011:40STN - SJU

3 stops28h 24mMultiple Airlines

Sun 5/1007:05SJU - STN

2 stops22h 35mMultiple Airlines

Deal found 13/9£765

Mon 20/1007:05STN - SJU

2 stops23h 57mMultiple Airlines

Tue 2/1221:25SJU - STN

1 stop12h 25mMultiple Airlines

Deal found 15/9£782

Tue 28/1020:25STN - SJU

2 stops45h 59mMultiple Airlines

Tue 4/1121:25SJU - STN

1 stop12h 25mMultiple Airlines

Deal found 13/9£784

Mon 13/1007:05STN - SJU

2 stops37h 19mMultiple Airlines

Mon 20/1020:20SJU - STN

1 stop20h 00mMultiple Airlines

Deal found 15/9£790

Wed 29/1008:30STN - SJU

2 stops19h 59mMultiple Airlines

Wed 5/1121:25SJU - STN

1 stop12h 45mMultiple Airlines

Deal found 14/9£823

Best flights from Stansted to San Juan
Discover carefully curated flight deals from Stansted to San Juan that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 September 2025.

Thu 12/207:40STN - SJU

1 stop16h 15mMultiple Airlines

Tue 17/221:25SJU - STN

1 stop18h 50mMultiple Airlines

Deal found 13/9£501

Wed 5/1105:55STN - SJU

1 stop14h 40mMultiple Airlines

Fri 14/1118:17SJU - STN

2 stops21h 43mMultiple Airlines

Deal found 15/9£622

Sat 11/1011:40STN - SJU

3 stops28h 16mMultiple Airlines

Fri 17/1002:49SJU - STN

3 stops26h 51mMultiple Airlines

Deal found 13/9£664

Sat 8/1109:55STN - SJU

2 stops35h 59mMultiple Airlines

Thu 13/1121:40SJU - STN

1 stop12h 55mMultiple Airlines

Deal found 15/9£680

Thu 12/307:40STN - SJU

1 stop16h 15mMultiple Airlines

Mon 23/321:25SJU - STN

1 stop34h 05mMultiple Airlines

Deal found 13/9£692

Tue 11/1120:25STN - SJU

1 stop24h 10mMultiple Airlines

Sat 22/1118:30SJU - STN

2 stops33h 10mMultiple Airlines

Deal found 14/9£699

Mon 27/1008:05STN - SJU

2 stops28h 20mMultiple Airlines

Mon 10/1121:40SJU - STN

1 stop12h 25mMultiple Airlines

Deal found 14/9£714

Tue 16/1207:40STN - SJU

2 stops31h 14mMultiple Airlines

Fri 16/121:25SJU - STN

1 stop12h 50mMultiple Airlines

Deal found 14/9£728

Sat 7/207:05STN - SJU

2 stops16h 50mMultiple Airlines

Tue 17/221:25SJU - STN

1 stop12h 25mMultiple Airlines

Deal found 13/9£749

Wed 1/1011:40STN - SJU

3 stops28h 24mMultiple Airlines

Sun 5/1007:05SJU - STN

2 stops22h 35mMultiple Airlines

Deal found 13/9£765

Wed 26/1105:55STN - SJU

1 stop18h 00mMultiple Airlines

Sun 30/1117:54SJU - STN

2 stops21h 36mMultiple Airlines

Deal found 13/9£782

Last-minute flights from Stansted to San Juan
Discover last-minute flight deals from Stansted to San Juan. Data last updated 15 September 2025 and is based on user searches.

Wed 1/1011:40STN - SJU

3 stops28h 24mMultiple Airlines

Sun 5/1007:05SJU - STN

2 stops22h 35mMultiple Airlines

Deal found 13/9£765

Sat 11/1011:40STN - SJU

3 stops28h 16mMultiple Airlines

Fri 17/1002:49SJU - STN

3 stops26h 51mMultiple Airlines

Deal found 13/9£664

Mon 13/1007:05STN - SJU

2 stops37h 19mMultiple Airlines

Mon 20/1020:20SJU - STN

1 stop20h 00mMultiple Airlines

Deal found 15/9£790

Tue 14/1022:35STN - SJU

2 stops30h 54mMultiple Airlines

Tue 21/1016:55SJU - STN

1 stop14h 05mMultiple Airlines

Deal found 14/9£863

Mon 20/1007:05STN - SJU

2 stops23h 57mMultiple Airlines

Tue 2/1221:25SJU - STN

1 stop12h 25mMultiple Airlines

Deal found 15/9£782

Mon 27/1008:05STN - SJU

2 stops28h 20mMultiple Airlines

Mon 10/1121:40SJU - STN

1 stop12h 25mMultiple Airlines

Deal found 14/9£714

Tue 28/1020:25STN - SJU

2 stops45h 59mMultiple Airlines

Tue 4/1121:25SJU - STN

1 stop12h 25mMultiple Airlines

Deal found 13/9£784

Wed 29/1008:30STN - SJU

2 stops19h 59mMultiple Airlines

Wed 5/1121:25SJU - STN

1 stop12h 45mMultiple Airlines

Deal found 14/9£823

One-way flights from Stansted to San Juan
Search for one-way flight options from Stansted to San Juan. Find affordable one-way fares based on user searches. Data last updated 15 September 2025.

Thu 5/221:20STN - SJU

2 stops32h 22mMultiple Airlines

Deal found 14/9£287

Fri 7/1115:00STN - SJU

3 stops40h 33mMultiple Airlines

Deal found 14/9£290

Wed 22/1007:30STN - SJU

3 stops47h 14mMultiple Airlines

Deal found 13/9£321

Fri 24/1011:35STN - SJU

3 stops56h 49mMultiple Airlines

Deal found 13/9£342

Thu 16/1017:50STN - SJU

3 stops38h 01mMultiple Airlines

Deal found 14/9£400

Mon 5/106:30STN - SJU

2 stops37h 49mMultiple Airlines

Deal found 12/9£420

Cheapflights Fare Finder

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 12/2

07:40-19:55

1 stop16h 15m

San Juan Luis Munoz Marin Intl

Tue 17/2

21:25-20:15

1 stop18h 50m

£501

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Wed 5/11

05:55-16:35

1 stop14h 40m

San Juan Luis Munoz Marin Intl

Fri 14/11

18:17-20:00

2 stops21h 43m

£622

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Sat 11/10

11:40-10:56

3 stops28h 16m

San Juan Luis Munoz Marin Intl

Fri 17/10

02:49-10:40

3 stops26h 51m

£664

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Sat 8/11

09:55-17:54

2 stops35h 59m

San Juan Luis Munoz Marin Intl

Thu 13/11

21:40-14:35

1 stop12h 55m

£680

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Thu 12/3

07:40-19:55

1 stop16h 15m

San Juan Luis Munoz Marin Intl

Mon 23/3

21:25-11:30

1 stop34h 05m

£692

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Tue 11/11

20:25-16:35

1 stop24h 10m

San Juan Luis Munoz Marin Intl

Sat 22/11

18:30-07:40

2 stops33h 10m

£699

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Mon 27/10

08:05-08:25

2 stops28h 20m

San Juan Luis Munoz Marin Intl

Mon 10/11

21:40-14:05

1 stop12h 25m

£714

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Tue 16/12

07:40-10:54

2 stops31h 14m

San Juan Luis Munoz Marin Intl

Fri 16/1

21:25-14:15

1 stop12h 50m

£728

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Sat 7/2

07:05-19:55

2 stops16h 50m

San Juan Luis Munoz Marin Intl

Tue 17/2

21:25-13:50

1 stop12h 25m

£749

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Wed 1/10

11:40-11:04

3 stops28h 24m

San Juan Luis Munoz Marin Intl

Sun 5/10

07:05-10:40

2 stops22h 35m

£765

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 17 results

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

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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Stansted 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

Fly with Cheapflights

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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Cheap flights from London Stansted Airport to San Juan from £287

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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Stansted to San Juan

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Stansted to San Juan

Cheapest flights from Stansted to San JuanExplore 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 15 September 2025.

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 15 September 2025.

Cheapflights Fare Finder

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

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.

Cheapflights Insights

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

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?

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

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

What is the cheapest month to book a flight from London Stansted 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 Stansted to San Juan

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

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 Stansted to San Juan?

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

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

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

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Travel Smart

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 15 September 2025.