Sea-Tac travelers: You may get detoured

If you're headed for gates in Sea-Tac Airport's North Satellite Terminal or on Concourse D, you're in for a detour for the next two weeks or so.

The airport’s north security checkpoint closest to those gates has been closed to allow installation of new full-body scanner equipment by the Transportation Security Administration, the federal agency that handles airport passenger screening.

The north checkpoint is the one closest to check-in counters used by United, Alaska and Horizon airlines. Passengers can use one of the three other airport security checkpoints during the closure.

Once you’ve passed security, you can walk or take the underground shuttle to satellite terminals or walk to any of the A, B, C or D concourse gates.

Alaska Airlines cautions travelers to show up for their flights earlier than usual because of the shutdown.