Route notes
Why this routing works
This routing moves west from Phoenix across North and Southeast Asia, starting with the longest scheduled stay in Tokyo before stepping down to shorter stops in Da Nang and Singapore. That sequencing keeps the trip structure straightforward: one major long-haul departure, two regional onward segments, then the return to Phoenix.
With 12 nights in Tokyo, 7 in Da Nang, and 4 in Singapore, the stop lengths are clearly differentiated rather than evenly split. That usually makes this kind of ticket easier to frame as one open-jaw-style journey in sequence without backtracking, while still keeping each onward flight in a logical geographic progression.
In premium economy, this itinerary fits travelers who want a more comfortable long-haul setup without moving into a higher cabin across the full ticket. At 10 weeks overall, there is also substantial unscheduled time around the listed stopovers, so the pacing is not built as a rushed city-to-city run.
A May departure places the trip in the April-to-June season window, which is useful for planning a single ticket across all sectors at once. As a multi-stop itinerary rather than a simple round trip, the value here is in locking the order, stop durations, cabin, and return to Phoenix into one coordinated routing.