Originally Posted by
publicrelasian
I'm a Canadian citizen traveling HKG-GUM-HNL-SFO-YVR next week, don't expect to check a bag, just carry on. The GUM layover is only 40 minutes, I presume since I'm arriving from HKG that I would clear US Immigration as indicated earlier in this thread and I have TSA Pre-check but it still seems awfully tight: my questions: Does Pre-check even operate in GUM?
No PreCheck according to the official listing. Even if they do, you're using the post-immigration TSA, not the regular public entrance TSA. For immigration, there's supposedly Global Entry at GUM but I don't know if it does any good admitting you to the 50US or declaring US customs at HNL. You will have to re-clear TSA at HNL (dumped landside after customs), so PreCheck will be useful.