Seattle (SEA) flight delays
Departures · 25 routes · 9,750 flights · May 2026 · source: US BTS
Departures from Seattle (SEA) run late
19%of the time, by +54 min on average when they do.
This is the historical record, not today's status — for live departures, check the airport's own board.
On-time rate
81%
Delayed 3h+
0.6%
Cancelled
0.5%
Avg when late
+54m
Best & worst routes from Seattle (SEA)
Busiest routes from Seattle (SEA)
Seattle, WA → Los Angeles, CAdelayed 13%
Seattle, WA → Phoenix, AZdelayed 17%
Seattle, WA → San Francisco, CAdelayed 59%
Seattle, WA → Anchorage, AKdelayed 21%
Seattle, WA → Chicago, ILdelayed 19%
Seattle, WA → Denver, COdelayed 17%
Seattle, WA → Las Vegas, NVdelayed 21%
Seattle, WA → Dallas/Fort Worth, TXdelayed 21%
Seattle, WA → San Diego, CAdelayed 17%
Seattle, WA → Spokane, WAdelayed 12%
Seattle, WA → Portland, ORdelayed 16%
Seattle, WA → Sacramento, CAdelayed 15%
Frequently asked
How often are flights from Seattle (SEA) delayed?
About 19% of departures from Seattle (SEA) arrive late (15+ minutes), across 25 routes and 9,750 flights in May 2026, based on public US BTS data.
Which route from Seattle (SEA) is most delayed?
Seattle, WA → San Francisco, CA is the least punctual departure (delayed 59%), while Seattle, WA → Santa Ana, CA is the most on-time (7%).
Delay figures are historical, from public US BTSpunctuality data — not a forecast for any given flight, and not a live status board. “%” is the share of departures arriving 15+ minutes late.