Route notes
Why this routing works
This routing uses a simple westbound transatlantic structure: Phoenix to Paris, an overland move onward to London, then a final long-haul back to Phoenix. With only two European stops across three weeks, the schedule leaves room for a measured pace instead of stacking short flights inside the trip.
The surface sector between Paris and London removes the need to backtrack by air between nearby gateways. That keeps the ticket focused on the long-haul segments while still linking both cities in sequence before the return to the US.
In business class, the longest flying is concentrated on the outbound and final return rather than split across multiple internal hops. April departures fit well with this kind of plan, where the overland connection sits in the middle and the trip closes with a single transatlantic flight home.