SEA Seattle

How deep the SEA board really is

The table above says where a courier can fly from SEA. This reads the same 145 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.

• 75of the 145 destinations are flown by one airline
• 25destinations run less than once a day
• 50destinations have four or more departures a day
• 72.4%of the destinations name Alaska Airlines, the largest presence here

Who holds the departures at SEA

48 airlines appear on the SEA board and they do not hold it evenly. Alaska Airlines is on 105 of the 145 destinations, 72.4 per cent of them, and on 39 of those it is the only airline flying the sector. The destinations it appears on carry 671 of the 717.9 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 Delta Air Lines on 60 destinations. 32 of the 48 airlines at SEA 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 105 of the 145 destinations on one airline, the second aircraft on an SEA sector is usually another Alaska 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 SEA than the destination count does.

How much of the SEA board is daily

Of the 145 destinations, 120 are flown at least once a day and 25 are not, 11 of them running once a week or less. The median destination on the SEA board is flown about twice 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: SEA to Yuma (YUM) 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 121.1 of the 717.9 departures a day, 16.9 per cent of the whole board. The other 140 destinations are spread widely enough that a courier who misses the first departure at SEA usually has somewhere else to look on the same board.

Destination	Country	The only airline on it	Flights a week	km	Routing
Amarillo AMA	the United States	Southwest Airlines	1	2,181	plan this
Bismarck BIS	the United States	NJM	1	1,628	plan this
Burlington/Mount Vernon MVW	the United States	Empire Airlines	1	114	plan this
Chongqing CKG	China	Hainan Airlines	1	10,138	plan this
Coeur d'Alene COE	the United States	Flexjet	1	413	plan this
Hayward HWD	the United States	Alaska Airlines	1	1,089	plan this
Midland MAF	the United States	NetJets Aviation	1	2,422	plan this
Misawa MSJ	Japan	Atlas Air	1	7,218	plan this
Phoenix AZA	the United States	Flexjet	1	1,809	plan this
Puerto Vallarta PVR	Mexico	Alaska Airlines	1	3,349	plan this

The ten destinations out of SEA 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. 14 further destinations sit in the same position and are listed in the board above.

The way back from SEA

The desk holds the return direction for 82 of the 145 destinations, and a courier plans the way back on those figures rather than on the outbound. On two of them the return into SEA runs thinner than the outbound by more than a quarter. The widest gaps are Istanbul (IST) at 1.4 out a day against 1 back and Edmonton (YEG) at 2.3 out a day against 1.7 back.

It runs the other way as well: Washington (IAD) files 6.9 a day back into SEA against 2.3 outbound, which is the shape that strands a courier at this end rather than at the far end.

The clock at SEA

SEA keeps America/Los_Angeles time, eleven hours behind Dubai in summer and twelve hours behind in winter, because the clock here moves and the Gulf clock does not.

When it is 09:00 on a Dubai working morning it is 22:00 at SEA, and a nine to six day at each end does not overlap at all, so an instruction written in Dubai is read here on the following working day unless somebody is woken up.

The night at SEA

6 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 London (LHR) the door shuts at 23:30 local, so the last departure from SEA that lands inside it leaves around 05:43, on a modelled block of 9h 47m. Into Amsterdam (AMS) the door shuts at 23:00 local, so the last departure from SEA that lands inside it leaves around 04:03, on a modelled block of 9h 57m. Into Frankfurt-am-Main (FRA) the door shuts at 23:00 local, so the last departure from SEA that lands inside it leaves around 03:38, on a modelled block of 10h 22m. Those three departure times out of SEA 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 SEA turns up on the rest of this site

SEA carries two other pages on this site as well: the United States country desk, which sets out the customs practice, the working week and the road legs behind this airport and the SEA transit page for the connecting case, where a courier changes aircraft here rather than starting or finishing.

The site publishes 55 airport pair pages that start or end at SEA, each with the distance, the block time, the carriers on the sector and a door to door clock. The busiest are Seattle to Los Angeles (LAX), Seattle to Anchorage (ANC) and Seattle to Denver (DEN).

Two of the 346 published hand carry lanes run through this airport: Dubai to Seattle and Seattle to Nagoya. A lane page is the commercial version of the board above, with the customs, the ground legs and the price at SEA written out.

Six courier postings name SEA as the airport a courier here flies from: Tacoma, Everett and Bellingham.

To price a movement rather than read the board, the route calculator opens with SEA already set as the origin, and it works out the flying time, the distance and the delivery hour for any of the 145 destinations above.