Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Honolulu to Glasgow as you normally would.
Honolulu (HNL) is the airport you will fly out of if you book a flight from Honolulu to Glasgow. You should not have trouble finding flights to Glasgow from Honolulu; the airport handles an average of 0 outbound flights to Glasgow per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the Honolulu airport to Glasgow. It is only a 4.4 mi journey to Honolulu (HNL) from Honolulu’s city center.
Great question - HNL to GLA just means Honolulu Airport to Glasgow Intl Airport. Now you’ll know what these unique codes when you look for flights! Edinburgh Turnhouse Airport (EDI), Glasgow Prestwick Airport (PIK), Dundee Airport (DND), Isle of Islay Glenegedale Airport (ILY), Campbeltown Machrihanish Airport (CAL) are other airports near this flight route and their unique identifiers/IATA codes.