Seattle (SEA) flight delays
Departures · 21 routes · 7,992 flights · April 2026 · source: US BTS
Departures from Seattle (SEA) run late
16%of the time, by +58 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
84%
Delayed 3h+
0.7%
Cancelled
0.2%
Avg when late
+58m
Best & worst routes from Seattle (SEA)
Busiest routes from Seattle (SEA)
Seattle, WA → Phoenix, AZdelayed 14%
Seattle, WA → Los Angeles, CAdelayed 11%
Seattle, WA → San Francisco, CAdelayed 52%
Seattle, WA → Las Vegas, NVdelayed 16%
Seattle, WA → Denver, COdelayed 12%
Seattle, WA → Chicago, ILdelayed 20%
Seattle, WA → Anchorage, AKdelayed 16%
Seattle, WA → Dallas/Fort Worth, TXdelayed 15%
Seattle, WA → San Diego, CAdelayed 12%
Seattle, WA → Spokane, WAdelayed 14%
Seattle, WA → Portland, ORdelayed 9%
Seattle, WA → Sacramento, CAdelayed 12%
Frequently asked
How often are flights from Seattle (SEA) delayed?
About 16% of departures from Seattle (SEA) arrive late (15+ minutes), across 21 routes and 7,992 flights in April 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 52%), while Seattle, WA → Salt Lake City, UT is the most on-time (8%).
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.