SEA Delays

Every reading taken of SEA since this site started sampling the FAA's feed — what was holding traffic, why, and for how long. 8 of the 13 were ground delay programmes, the kind that costs an airline money. The worst hold recorded was 3h 56m.

13 readings

Newest first. The FAA keeps none of this, so every row here is a sample that would otherwise be gone.

When	Kind	Reason	Typical	Worst
25 Sep 2026 00:36	ground delay	runway construction	47m	3h 56m
30 Sep 2026 00:32	ground delay	low ceilings	55m	1h 57m
28 Sep 2026 04:31	ground delay	runway construction	33m	1h 37m
28 Sep 2026 00:32	ground delay	runway construction	33m	1h 37m
29 Sep 2026 00:30	ground delay	runway construction	37m	1h 29m
22 Sep 2026 00:33	ground delay	runway construction	35m	1h 22m
21 Sep 2026 01:57	ground delay	runway construction	33m	1h 19m
24 Sep 2026 00:34	ground delay	runway construction	36m	1h 12m
10 Oct 2026 20:16	departure	RWY:Construction	16m	30m
10 Oct 2026 19:46	departure	RWY:Construction	16m	30m
29 Sep 2026 16:32	departure	RWY:Construction	16m	30m
20 Sep 2026 01:26	departure	RWY:Construction	16m	30m
20 Sep 2026 00:30	departure	RWY:Construction	16m	30m

Source: the FAA's national airspace status feed. A ground delay programme holds aircraft at their origin because SEA cannot take them, and is the one that costs an airline money. The reason is quoted as the FAA writes it.

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