The cheapest times to fly from GUM to STN are

  • early to mid May
  • August 13th to October 7th
  • October 29th to March 25th (except the weeks of December 17th, December 24th, February 5th, and February 12th)

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 GUM to STN is mid March. Prices can be as high as $17700 for Tuesday flights during late December, or as low as $2820 for Friday flights around mid March.


When to Fly to London

Flying from Guam, GU (GUM) to London (STN) will usually cost between $3342 to $9250 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid March with an average ticket price of $6317. Due to high demand the most expensive time to fly is late December, with an average price of $8887. Planning your trip to low-cost times can easily save you $2571 on economy flights and even more on first-class flights. Generally, any price below $7794 can be considered a good price for a round-trip GUM to STN flight.

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

GUM to STN Flight Prices

Compared to other flights, the GUM to STN flight is more expensive than the average and costs more than the average flight leaving from Guam. The average price per mile (for a direct flight) is $0.65, which is above average.


Flight Prices by Day of the Week

Friday is usually the cheapest day to fly to STN, and Tuesday the cheapest day to fly back into GUM. Tuesdays are the most expensive days to fly to London, and Sundays are the most expensive days to return to Guam. Selecting flights on the least expensive days could save you up to $2588 (28%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Friday and returning a week later will cost an average of $5742. Return trip prices are from the STN to GUM 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 GUM to STN can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 14 hour 23 minutes may be realistic.


Flight Hacking GUM 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 GUM to STN — but Champion Traveler does!

Hack #1: Seoul (GUM > ICN > STN)

  • Price for both tickets: $1473
  • Average savings: $6321 (81.1%)

See GUM to ICN flights

Hack #2: Hong Kong (GUM > HKG > STN)

  • Price for both tickets: $1484
  • Average savings: $6310 (80.96%)

See GUM to HKG flights

Hack #3: Taipei (GUM > TPE > STN)

  • Price for both tickets: $1731
  • Average savings: $6064 (77.8%)

See GUM to TPE flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 15 major airlines flying this route most often: Air Moldova, ANA, Austrian, Brussels Airlines, Cathay Pacific, Emirates, Eurowings, Finnair, JAL, KLM, Lufthansa, SAS, SWISS, Turkish Airlines, United, and potentially more during busy seasons.

How far away is it from London Stansted Airport to Guam International Airport?

The distance between the two airports is roughly 7446 miles or 11983 kilometers.

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

The real-world flight time for a nonstop GUM to STN flight is about 14 hour 23 minutes.

How many flights go between Guam, GU and London?

It depends on the day of the week and the date, but a typical day might have around 18 available flights from GUM to STN.


Airport Location Info


Departing Airport

Origination code GUM
Origination airport name Guam International Airport
City Guam, GU
Country the United States
Latitude 13.5
Longitude 144.8

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.