Question : Are you paying the cheapest or highest price for your ticket to Tucson?
Answer : Ranging from $596 to $641, prices for HND to TUS fluctuate a lot less than most routes from Japan. The further out you book a route, the more likely you are to save.
Question : What is the cheapest round-trip ticket you can get to Tucson?
Answer : Delta Air Lines is your best bet for finding that coveted low fare. They're offering fares as low as $596, while prices for other flights are as high as $641.