In September 2024,  Alaska Airlines’ takeover of Hawaiian Airlines officially closed . While Hawaiian Airlines has been part of Alaska Air Group since then, the integration has been a gradual process. Today is arguably one of the biggest days so far in that process. I’ve already covered how Hawaiian has joined the oneworld alliance , but that’s not the only thing changing as of today, as Hawaiian Airlines’ two letter code, “HA,” is also being retired as of today. Alaska & Hawaiian have now aligned flight numbers What’s left with the Alaska & Hawaiian integration? Bottom line Alaska & Hawaiian have now aligned flight numbers Airlines have two digit designator codes, which are put in front of flight numbers. Alaska uses the “AS” code, while Hawaiian has historically used the “HA” code. However, that’s no longer the case — as of today (April 22, 2026), all Hawaiian flight numbers are using the “AS” code.…