Route notes
Why this routing works
This itinerary is built as a three-week economy multi-stop from Albuquerque with an open-jaw start in Spain: the ticketed flight sequence begins after an overland segment into Bilbao, then continues by air to Barcelona and Palma de Mallorca before returning to Albuquerque. That structure works well for travelers who want flexibility at the front end without forcing a backtrack on the ticket.
Keeping all flight segments within Spain after the open-jaw arrival simplifies the routing. Bilbao to Barcelona sets up the eastbound progression, and Barcelona to Palma de Mallorca adds a short final intra-Spain hop before the long-haul return to the US. With 3 nights listed in Palma de Mallorca, this routing leaves the rest of the three-week window to be distributed across the earlier Spain segment and transit days.
September is a practical fit for this kind of itinerary because it keeps the whole ticket inside a single seasonal window while spacing a transatlantic roundtrip around two internal flights. From a ticketing standpoint, this is a straightforward multi-stop pattern: one long-haul outbound and return anchored by short regional sectors, priced here in the sold range of USD 1,463 to USD 2,232 in economy.