Beijing Daxing does fly to Europe, but not to Barcelona — the network stops at a handful of northern and southern European gateways.
There is no nonstop PKX–BCN flight
Beijing Daxing carries no scheduled service to Josep Tarradellas Barcelona–El Prat Airport. This is not a seasonal gap: when Daxing opened in 2019 it took the domestic network and a limited set of international routes, while Beijing’s European long-haul stayed at Beijing Capital (PEK).
Two things follow. First, a ticket that says “Beijing” is not self-explanatory — check whether it means PKX or PEK before you plan anything around it. Second, if your itinerary genuinely starts at Daxing, you are looking at a connection: either through another Chinese hub, or a change of airport in Beijing, which is a two-hour journey across the city rather than a connection.
Daxing does fly to Europe, just not to Barcelona. Its European gateways are Amsterdam, Frankfurt, Helsinki, Istanbul, Lisbon, London–Heathrow, Milan–Malpensa — connecting through one of those keeps you inside a single airport at the Beijing end. See the full destination list for what else Daxing serves.