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Seattle, WA: Seattle/Tacoma International (SEA)Scheduled Services except Freight/MailBTS Data as of 10/22/2018
Summary Data (U.S. Flights Only)Carrier Shares for August 2017 - July 2018
Passengers*2017**2018**%ChgRank***
Arrival19,972k20,908k4.69%8
Departure19,898k20,852k4.79%8
Scheduled Flights
Departures180,022187,6574.24%7
Freight/Mail (lb.) (Scheduled and Non-Scheduled)
Total594m644m8.40%17
Carriers
Scheduled20200.00%
* Scheduled enplaned revenue passengers.
** 12 months ending July of each year.
*** Among 789 U.S. airports, 12 months ending July 2018
CarrierPassengersShare
Alaska 17,25841.33%
Delta 6,86916.45%
Horizon Air3,5058.39%
Southwest 3,1237.48%
United 2,9897.16%
Other8,01519.19%
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 August 2017 - July 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%10
Avg Delay (min.)
Departure52.4050.3251.9454.3555.7153.813
Arrival48.6749.4852.0153.2652.6151.312
% Cancelled
Total0.41%0.46%0.39%0.38%0.61%0.49%3
Number of Flights (000)
Total103.1108.7121.3132.6137.2140.3
Number of Reporting Carriers
Total111111111111
* August 2017 - July 2018 .
** Ranked only for major U.S. airports, August 2017 - July 2018.