First - Coach - First Crossing the Pacific

First class over the Pacific can be one of the best in flight experiences available, see ANA, Cathay Pacific, or JAL for examples. As per tradition, US carriers do it worse or not at all. United is no exception. They run domestic configuration 737's out of Guam all around the Pacific. They also run a domestic 777-200 from Guam to Honolulu and regional upgrades don't work on this flight, so be ready for 7 long hours in coach. From Honolulu, it's all domestic configurations.

Like I'm Flying to Boston

Regional Upgrades Work HKG-GUM

This means passengers flying the equivalent distance of LAX to London have to do it in planes made for LAX to SFO. Even worse there is no free food or alcohol. United has a monopoly, more or less, on the central Pacific routes and no interest in improving the onboard experience. Be prepared.

View from GUM United Club

Breakfast on a Domestic 737 Flight for Comparison

Breakfast HNL-IAH - Meh

Meal Leaving HKG on 737