BRUSSELS, Belgium — With summer only a few months away, travelers eyeing European getaways may find the journey as challenging as the destination is alluring. Brussels is one of many European capitals bracing for renewed labor actions, squeezed aircraft supplies and detours around closed airspace that could snarl schedules from June through September.

WONSAN, North Korea — Just months after welcoming its first overseas guests since 2020, North Korea has once again shut the gates of its newly built seaside resort in Wonsan to foreigners, dimming hopes that the hermit nation was preparing for a broader tourism reboot.