Originally Posted by HkCaGu

Actually Guam is within US cBP jurisdiction but not US Cbp jurisdiction. Guam never had its own immigration department as far as anyone can remember. The CNMI used to be autonomous in terms of immigration, while AS's immigration autonomy remains to this day.



The only US territories with a civilian government but not their own customs is PR. If you meant immigration, Guam and the CNMI (since 2009-11-28) are both under UScBP, except Guam is more relaxed for Asian tourists and CNMI still has a large foreign labor force that cannot go anywhere else in the US (except for GUM airside-only transit for Filipinos). So there is a check at SPN for GUM and at GUM for HNL, but in the other direction you'll never see USCBP.



Nowadays HKG-GUM is not dependent on GUM-HKG and is now using the SGN-HKG 73G/738 that has sat at HKG since ~10 am. This should help avoid incoming flight delays, but given the state of UA maintenance, can lead to another possibility.

If they decide to misconnect, there are two GUM-NRT to get you to the US mainland. The early flight may be useless during winter due to scheduling, but it's a B772 that is often far from filled up.

Now I have some questions for those who had done HKG/MNL-GUM-HNL recently: (1) Do you go through two CBP checks, once off the plane, and again at Gate 8/9 before you board? (2) Is there any need to fill out the Guam customs form at all? (3) Do they still scan BP at the gate lounge entrance and have a 45-minute deadline to enter?

45 minutes is barely enough for the UScBP to clear everyone onto GUM-HNL, so to my knowledge, if someone has a complicated entry to the US (new immigrant, new work visa), it can indeed be processed at HNL after the flight lands. There had been an extreme case of a petitioned child's visa expiring on the day before the 21st birthday, hence invalid for GUM entry, but valid for HNL.