The cheapest times to fly from SJU to STN are

  • January 8th to March 25th
  • May 14th to June 10th (except the week of May 21st)
  • September 17th to December 9th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from SJU to STN is mid January. Prices can be as high as $7164 for Thursday flights during early May, or as low as $874 for Monday flights around mid January.


When to Fly to London

Flying from San Juan, PR (SJU) to London (STN) will usually cost between $931 to $2578 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid January with an average ticket price of $1022. Due to high demand the most expensive time to fly is early May, with an average price of $3768. Planning your trip to low-cost times can easily save you $2746 on economy flights and even more on first-class flights. Generally, any price below $1518 can be considered a good price for a round-trip SJU to STN flight.

See below for a graph of average weekly prices for the SJU to STN route. All prices are for round-trip tickets in USD.

SJU to STN Flight Prices

Compared to other flights, the SJU to STN flight is more expensive than the average and costs more than the average flight leaving from San Juan. The average price per mile (for a direct flight) is $0.22, which is below average.


Flight Prices by Day of the Week

Monday is usually the cheapest day to fly to STN, and Wednesday the cheapest day to fly back into SJU. Thursdays are the most expensive days to fly to London, and Sundays are the most expensive days to return to San Juan. Selecting flights on the least expensive days could save you up to $685 (23%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Monday and returning a week later will cost an average of $1451. Return trip prices are from the STN to SJU flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from SJU to STN can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 8 hour 34 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from SJU to STN while comparing.

Destination alternative #1: London Gatwick Airport (LGW) in London

  • 54 miles (87 km) away from STN
  • Usually 48.09% less expensive than STN
  • 1-layover flights available

See SJU to LGW flights


Flight Hacking SJU to STN

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from SJU to STN — but Champion Traveler does!

Hack #1: Newark, NJ (SJU > EWR > STN)

  • Price for both tickets: $979
  • Average savings: $540 (35.54%)

See SJU to EWR flights

Hack #2: Barcelona (SJU > BCN > STN)

  • Price for both tickets: $992
  • Average savings: $526 (34.65%)

See SJU to BCN flights

Hack #3: Frankfurt (SJU > FRA > STN)

  • Price for both tickets: $997
  • Average savings: $522 (34.35%)

See SJU to FRA flights


Flight Questions Answered

Still have questions about flying from SJU to STN? We’ve got answers.

Which airlines fly this route?

You can find 17 major airlines flying this route most often: Air Canada, Air France, American, atlasglobal, British Airways, Brussels Airlines, Delta, Eurowings, Iberia, JetBlue, KLM, Loganair, Lufthansa, SAS, SWISS, Tap Air Portugal, United, and potentially more during busy seasons.

How far away is it from London Stansted Airport to Luis Munoz Marin International Airport?

The distance between the two airports is roughly 4214 miles or 6782 kilometers.

How long does it take to fly from SJU to STN?

The real-world flight time for a nonstop SJU to STN flight is about 8 hour 34 minutes.

How many flights go between San Juan, PR and London?

It depends on the day of the week and the date, but a typical day might have around 65 available flights from SJU to STN.


Airport Location Info


Departing Airport

Origination code SJU
Origination airport name Luis Munoz Marin International Airport
City San Juan, PR
Country the United States
Latitude 18.4
Longitude -66

Return Airport

Destination code STN
Destination airport name London Stansted Airport
City London
Country the United Kingdom
Latitude 51.9
Longitude 0.2


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.