Airport
Seattle–Tacoma International Airport
SEA · Seattle, WA
- IATA Code
- SEA
- ICAO Code
- KSEA
- City
- Seattle
- Country
- United States
- Website
- www.portseattle.org
Seattle–Tacoma International Airport is a major airport serving Seattle, WA. Its IATA code is SEA and its ICAO code is KSEA.
The airfield sits 433 feet above sea level.
Below you'll find official on-time statistics, current weather and delays, nearby aircraft and traveler reviews. Flown through SEA recently? Share your experience to help other travelers.
SEA by the numbers
IATA SEA · ICAO KSEA · 433 ft elevation · Map
Loading live weather, forecasts, delays and nearby aircraft…
Official departure punctuality
Ranks #238 of 358 U.S. airports for on-time departures
- On-time departures
- 78.6%
- Less than 15 minutes late
- Cancelled
- 0.9%
- Of scheduled flights
- Average delay when late
- 62 min
- Flights arriving 15+ minutes late
- Flights tracked
- 164,759
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 43%
- Late-arriving aircraft 29%
- Air traffic control & airport 23%
- Extreme weather 5%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Busiest routes from SEA
| Route | Flights | On time |
|---|---|---|
| Los Angeles (LAX) | 7,536 | 82% |
| Phoenix (PHX) | 7,205 | 78% |
| San Francisco (SFO) | 6,817 | 60% |
| Anchorage (ANC) | 6,619 | 77% |
| Denver (DEN) | 6,333 | 78% |
| Las Vegas (LAS) | 5,620 | 78% |
| Chicago (ORD) | 5,538 | 77% |
| Dallas-Fort Worth (DFW) | 5,228 | 78% |
| Spokane (GEG) | 4,956 | 83% |
| Portland (PDX) | 4,826 | 82% |
Airlines departing SEA
| Airline | Flights | On-time departures |
|---|---|---|
| Alaska Airlines | 76,970 | 76% |
| Delta Air Lines | 32,382 | 82% |
| SkyWest Airlines | 28,580 | 86% |
| United Airlines | 8,683 | 81% |
| Southwest Airlines | 8,194 | 62% |
| American Airlines | 6,768 | 75% |
| Frontier Airlines | 1,397 | 75% |
| Envoy Air | 760 | 86% |
| Hawaiian Airlines | 612 | 62% |
| JetBlue Airways | 413 | 42% |
Runways
| Runway | Length | Surface |
|---|---|---|
| 16L/34R | 11,901 ft | PEM, lighted |
| 16C/34C | 9,426 ft | PEM, lighted |
| 16R/34L | 8,500 ft | PEM, lighted |
Listen to the tower
Air traffic control frequencies, for scanners and airband radios.
- Tower 119.900 MHz
- Ground 121.700 MHz
- Clearance delivery 128.000 MHz
Runways and frequencies: OurAirports (public domain). Not for navigation.
Tags: SEA, KSEA, Seattle airport, Seattle–Tacoma International Airport
Reviews
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