Originally Posted by
seaflyguy
I'm a UA 1K and an AS MVPG, and I have both Global Entry and NEXUS. Can I use this on any flight out of SEA on either UA or AS? Will both airlines support me adding my [can't remember what it's called] code to my reservations?
You will if/when UA supports PreCheck at SEA. You will be eligible to use it on AS as soon as it opens.
To use PreCheck, you have to qualify, and the airline has to support it at that airport.