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Seattle, WA: Seattle/Tacoma International (SEA)Scheduled Services except Freight/MailBTS Data as of 9/21/2018
Summary Data (U.S. Flights Only)Carrier Shares for July 2017 - June 2018
Passengers*2017**2018**%ChgRank***
Arrival19,941k20,743k4.02%8
Departure19,872k20,677k4.05%8
Scheduled Flights
Departures180,058186,4923.57%7
Freight/Mail (lb.) (Scheduled and Non-Scheduled)
Total577m649m12.45%17
Carriers
Scheduled2019-5.00%
* Scheduled enplaned revenue passengers.
** 12 months ending June of each year.
*** Among 791 U.S. airports, 12 months ending June 2018
CarrierPassengersShare
Alaska 17,01741.08%
Delta 6,73516.26%
Horizon Air3,5198.50%
Southwest 3,1297.55%
United 2,9837.20%
Other8,03719.40%
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 July 2017 - June 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%85%4
Arrival83%82%83%83%80%82%12
Avg Delay (min.)
Departure52.4050.3251.9454.3555.7153.743
Arrival48.6749.4852.0153.2652.6150.813
% Cancelled
Total0.41%0.46%0.39%0.38%0.61%0.49%3
Number of Flights (000)
Total103.1108.7121.3132.6137.2139.7
Number of Reporting Carriers
Total111111111111
* June 2017 - May 2018 .
** Ranked only for major U.S. airports, June 2017 - May 2018.