What's the busiest hour for departures at SEA?

Departures from Seattle Tacoma International Airport peak at 17:00 local time, averaging 150.9 flights per hour over the past 60 days.

What's the quietest hour to fly out of SEA?

The quietest hour with regular service is 03:00 local time, averaging 1 flights per hour.

Alaska Airlines, (AS) is the largest operator at Seattle Tacoma International Airport, with 21103 observed departures in the past 60 days.

Los Angeles (LAX) is the most-flown destination, with 6838 observed departures in the past 60 days.

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Seattle, United States. Departures peak at 17:00 local, averaging 150.9 flights per hour.

Window: last 60 days. Last refreshed: 2026-10-02. Schedule coverage: 167 days observed.

Peak departure hour

17:00

150.9 flights/hr

Quietest active hour

03:00

1 flights/hr

Traffic score

74/100

Relative volume

Avg per day, last 60 days

Total: 1802.7 avg departures per day.

Weekday avg per hour

Weekend avg per hour

Avg per day, last 60 days

Peak arrival hour: 16:00 local (152.3 flights/hr). Total: 1872.3 avg arrivals/day.

What's the busiest hour for departures at SEA?: Departures from Seattle Tacoma International Airport peak at 17:00 local time, averaging 150.9 flights per hour over the past 60 days.
What's the quietest hour to fly out of SEA?: The quietest hour with regular service is 03:00 local time, averaging 1 flights per hour.
Which airline operates the most flights from SEA?: Alaska Airlines, (AS) is the largest operator at Seattle Tacoma International Airport, with 21103 observed departures in the past 60 days.
What's the most popular destination from SEA?: Los Angeles (LAX) is the most-flown destination, with 6838 observed departures in the past 60 days.

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