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Seattle, WA: Seattle/Tacoma International (SEA)Scheduled Services except Freight/MailBTS Data as of 1/21/2019
Summary Data (U.S. Flights Only)Carrier Shares for October 2017 - September 2018
Passengers*2017**2018**%ChgRank***
Arrival20,065k21,122k5.27%8
Departure19,978k21,077k5.50%8
Scheduled Flights
Departures179,994189,2435.14%7
Freight/Mail (lb.) (Scheduled and Non-Scheduled)
Total607m650m7.19%17
Carriers
Scheduled20200.00%
* Scheduled enplaned revenue passengers.
** 12 months ending September of each year.
*** Among 792 U.S. airports, 12 months ending September 2018
CarrierPassengersShare
Alaska 17,60041.71%
Delta 7,02116.64%
Horizon Air3,4958.28%
Southwest 3,1287.41%
United 3,0227.16%
Other7,93318.80%
Based on enplaned passengers(000) both arriving and departing.
Total Passengers (U.S. Flights, in millions)Top 10 Destination Airports (U.S. Only, Passengers (000))
*  Before October 2002, only carriers operating aircraft with more than 60 seats or 18,000 pounds in payload reported traffic data.
** 2018 represents data for October 2017 - September 2018.
Source: T-100 Domestic Market (US Carriers).
SEA vs. National Departure Delays (Major U.S. Carriers)SEA On-Time Performance Summary (Major U.S. Carriers Only)
A flight is considered delayed when it arrived or departed 15 or more minutes than the schedule. Delayed minutes are calculated from delayed flights only.
Domestic Flights, 2013-2018
% On Time201320142015201620172018*Rank**
Departure85%84%84%85%83%84%6
Arrival83%82%83%83%80%80%17
Avg Delay (min.)
Departure52.4050.3251.9454.3555.7154.783
Arrival48.6749.4852.0153.2652.6151.792
% Cancelled
Total0.41%0.46%0.39%0.38%0.61%0.50%3
Number of Flights (000)
Total103.1108.7121.3132.6137.2140.6
Number of Reporting Carriers
Total111111111111
* November 2017 - October 2018 .
** Ranked only for major U.S. airports, November 2017 - October 2018.