In general, passengers in first class are not required to stay seated until after all other passengers have boarded the plane. However, specific procedures and policies may vary among airlines and individual flights.

In many cases, airlines may offer priority boarding for passengers in first class or premium cabins. This allows them to board the aircraft before other passengers, giving them ample time to settle in and enjoy the premium amenities offered in their cabin.

After first class passengers have boarded, the boarding process typically continues with other premium cabin passengers (such as business class) and passengers with certain status levels (frequent flyer program members, elite status holders) who are entitled to early boarding. Finally, the remaining passengers in economy class are invited to board.

While first class passengers generally have the privilege of boarding early, they are not necessarily required to remain seated until all other passengers have boarded. However, it’s worth noting that individual airline policies and procedures can vary, so it’s advisable to check with the specific airline or review their guidelines for accurate and up-to-date information on the boarding process.