What's the busiest hour for departures at SEA?

Departures from Seattle Tacoma International Airport peak at 07:00 local time, averaging 48.9 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 04:00 local time, averaging 1.2 flights per hour.

How long are security wait times at SEA?

Average weekday security wait at Seattle Tacoma International Airport is 2 minutes, and weekend wait is 2 minutes. This is a rolling average from public airport wait data.

Which airline operates the most flights from SEA?

Alaska Airlines, (AS) is the largest operator at Seattle Tacoma International Airport, with 8545 observed departures in the past 60 days.

What's the most popular destination from SEA?

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

🇺🇸

SEA Airport - Seattle Tacoma International Airport

Seattle, United States. Departures peak at 07:00 local, averaging 48.9 flights per hour.

Window: last 60 days. Last refreshed: 2026-05-18. Schedule coverage: 31 days observed.

Peak departure hour

07:00

48.9 flights/hr

Quietest active hour

04:00

1.2 flights/hr

Avg weekday wait

2 min

Security

Avg weekend wait

2 min

Security

Traffic score

74/100

Relative volume

Departures by hour (local time)

Avg per day, last 60 days

Total: 592.1 avg departures per day.

Weekday vs weekend departure pattern

Weekday avg per hour

Weekend avg per hour

Arrivals by hour (local time)

Avg per day, last 60 days

Peak arrival hour: 16:00 local (87.5 flights/hr). Total: 1023.5 avg arrivals/day.

Top airlines

1. Alaska Airlines, (AS) 8,545
2. Delta Air Lines, (DL) 4,632
3. United Airlines, (UA) 732
4. American Airlines (AA) 711
5. Southwest Airlines (WN) 581

Top destinations

1. 🇺🇸 Los Angeles (LAX) 694
2. 🇺🇸 Phoenix (PHX) 641
3. 🇺🇸 Portland (PDX) 605
4. 🇺🇸 San Francisco (SFO) 569
5. 🇺🇸 Chicago (ORD) 555

Frequently asked

What's the busiest hour for departures at SEA?: Departures from Seattle Tacoma International Airport peak at 07:00 local time, averaging 48.9 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 04:00 local time, averaging 1.2 flights per hour.
How long are security wait times at SEA?: Average weekday security wait at Seattle Tacoma International Airport is 2 minutes, and weekend wait is 2 minutes. This is a rolling average from public airport wait data.
Which airline operates the most flights from SEA?: Alaska Airlines, (AS) is the largest operator at Seattle Tacoma International Airport, with 8545 observed departures in the past 60 days.
What's the most popular destination from SEA?: Los Angeles (LAX) is the most-flown destination, with observed departures in the past 60 days.

Tracking a flight through SEA?

Forward your booking and TripWaffle alerts you to gate changes, delays, baggage carousels, and security wait spikes - so you don't have to keep refreshing.

Get realtime alerts Free to start. No card required.

<- All airports · Busiest by hour · Quietest mornings · Methodology