From what I can tell, UA and NH files the same fares & fare routing (NYC-TYO, which covers NRT and HND), not to a direct airport
But UA adds USD$70 fuel surcharge each way/leg for the new HND flights. NH doesn't yet for now (and they don't have codeshares on the new UA flights yet- probably filed but not approved)
NH didn't rebank their HNd connections to rest of Asia (afaik), so HND connections aren't that good (land at 2pm, leave at 11pm. Or land at 5am, leave at 4pm)
Last edited by paperwastage; Jan 21, 2020 at 3:33 pm