There's no World Cup this year since the Candidates' tournaments will take its place (https://candidates2026.fide.com/). The Candidates' will be played in Cyprus from March 28 to April 16, assuming the venue isn't blown up by then (it apparently came under some kind of bombing attack due to the Iran war).
The World Cup last year was held in Goa, India (https://worldcup2025.fide.com/) so travel to the US wasn't an issue for either event. Travel FROM the US might be problematic for some people, depending on what the unpredictable US government does.