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Seattle-Tacoma International Airport is one of the most important airports on the U.S. West Coast. It combines a large domestic market with strong transpacific and international demand, making it one of the clearest examples of a U.S. airport that has moved beyond recovery and back into outright record growth.
Quick Answer (2026): Seattle-Tacoma International Airport handled 52.7 million passengers in 2025, a new record. SEA also recorded 435,896 aircraft operations and served 96 domestic plus 36 international destinations.
SEA key statistics
| Metric | Latest figure | Year |
|---|---|---|
| Total passengers | 52.7 million | 2025 |
| Domestic passengers | 45,610,105 | 2025 |
| International passengers | 7,105,076 | 2025 |
| Aircraft operations | 435,896 | 2025 |
| Air cargo | 427,971 metric tons | 2025 |
| Destinations | 96 domestic / 36 international | 2025 |
How many passengers use Seattle-Tacoma International Airport?
SEA handled 52.7 million passengers in 2025, up slightly from 2024 and enough to set another annual record. Of that total, 45.61 million were domestic passengers and 7.11 million were international passengers.
The international figure is especially notable because it shows SEA’s long-haul role continuing to strengthen, even as the airport also remains one of the country’s largest domestic gateways.
How many flights and operations does SEA handle?
Seattle-Tacoma recorded 435,896 takeoffs and landings in 2025. The airport says that was up 0.36% from 2024.
SEA also handled 427,971 metric tons of air cargo in 2025. That makes it not just a passenger airport, but also an important logistics and freight platform for the Pacific Northwest.
SEA route network
Port of Seattle says SEA is served by 37 airlines and offers 96 nonstop domestic destinations plus 36 international destinations. That network breadth is one reason the airport remains central to both regional travel and U.S.-Asia connectivity.
Why SEA matters
The airport basics page says SEA supports an economy that produces about $33 billion in economic activity. That helps explain why airport traffic, airline expansion, and terminal investment at SEA matter well beyond aviation.
FAQ
How many passengers used SEA in 2025?
SEA handled 52.7 million passengers in 2025.
How many aircraft operations did SEA have in 2025?
SEA recorded 435,896 takeoffs and landings in 2025.
How many destinations does SEA serve?
SEA serves 96 domestic and 36 international destinations.
How much cargo does SEA handle?
SEA handled 427,971 metric tons of air cargo in 2025.
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