GUM Hagatna

How deep the GUM board really is

The table above says where a courier can fly from GUM. This reads the same 13 destinations back for the questions a dispatcher asks second: how much of the board rests on one airline, how much of it runs less than daily, whether the return leg is as thick as the outbound, what the clock here does to a Gulf working day and which of the destinations shut at night, all of it computed on 2026-09-07 from AeroDataBox scheduled route statistics.

• 8of the 13 destinations are flown by one airline
• 5destinations run less than once a day
• 2destinations have four or more departures a day
• 84.6%of the destinations name United Airlines, the largest presence here

Who holds the departures at GUM

Eight airlines appear on the GUM board and they do not hold it evenly. United Airlines is on 11 of the 13 destinations, 84.6 per cent of them, and on 8 of those it is the only airline flying the sector. The destinations it appears on carry 14 of the 21 departures a day this airport files, though other airlines fly some of the same sectors, so read that as reach rather than as a share of the aircraft.

The next largest presence is T'Way Air on 2 destinations. 5 of the 8 airlines at GUM appear on a single destination each, which is the long tail every airport carries, and none of it is a rebooking option when the sector you need is the one that fell over.

An airport held this tightly is quick to book and slow to recover: with 11 of the 13 destinations on one airline, the second aircraft on a GUM sector is usually another United Airlines aircraft, and when there is not one the desk is looking at another airport rather than another airline. That is why the alternate airports listed above matter more at GUM than the destination count does.

How much of the GUM board is daily

Of the 13 destinations, 8 are flown at least once a day and 5 are not, 1 of them running once a week or less. The median destination on the GUM board is flown about once a day.

An average of 0.14 flights a day is the schedule statistic, and it is worth translating it before anything is promised to anybody: GUM to Yap Island (YAP) is about one a week, so a missed departure there is not a delay of hours, it is the next slot.

The five busiest destinations carry 16 of the 21 departures a day, 76.2 per cent of the whole board. More than half of everything that leaves GUM is aimed at those five places, so the depth on the board above is thinner than the destination count suggests, and a hand carry that is not going to one of them is planned around a single departure time.

Destination	Country	The only airline on it	Flights a week	km	Routing
Yap Island YAP	Micronesia	United Airlines	1	855	plan this
Pohnpei Island PNI	Micronesia	United Airlines	2	1,635	plan this
Taipei TPE	Taiwan	United Airlines	2	2,783	plan this
Tokoname NGO	Japan	United Airlines	3	2,509	plan this
Weno Island TKK	Micronesia	United Airlines	4	1,020	plan this

The five destinations out of GUM where one airline holds the sector and files fewer than seven departures a week, with the weekly figure taken as the average daily rate multiplied by seven rather than as a fixed timetable.

The way back from GUM

The desk holds the return direction for 9 of the 13 destinations, and a courier plans the way back on those figures rather than on the outbound. On none of those 9 does the return run more than a quarter thinner than the outbound, so a turnaround through GUM is a question of hours rather than of whether an aircraft exists.

It runs the other way as well: Osaka (KIX) files 2.3 a day back into GUM against 1.1 outbound, which is the shape that strands a courier at this end rather than at the far end.

The clock at GUM

GUM keeps Pacific/Guam time, six hours ahead of Dubai all year.

When it is 09:00 on a Dubai working morning it is 15:00 at GUM, so a nine to six day at each end overlaps for three hours. That is a narrow window for a signature, a customs query or an authority to release, and it is the reason a consignment for GUM is briefed the day before rather than on the morning it flies.

The night at GUM

1 of the destinations from here carry a documented night restriction of their own, which is a departure time question at this end rather than an arrival problem at the other.

Into Tokyo (NRT) the door shuts at 23:00 local, so the last departure from GUM that lands inside it leaves around 20:17, on a modelled block of 3h 43m. Those one departure times out of GUM are worked backwards from the published window with the block time model this site uses everywhere, 720 to 880 km an hour by sector length with thirty minutes on the ground, so they are arithmetic rather than a timetable and the desk checks the published departure before it promises the landing.

Where GUM turns up on the rest of this site

The airport also sits behind the Guam country desk, which sets out the customs practice, the working week and the road legs behind this airport.

To price a movement rather than read the board, the route calculator opens with GUM already set as the origin, and it works out the flying time, the distance and the delivery hour for any of the 13 destinations above.