We loved Sri Lanka at easter, so much to see and do and the food is fab! Other places we’ve been and loved with our teen are Japan ( as pp have said flights are most expensive part although I guess Sakura season will push prices up a bit), so much to see, our son loved the old, the new and everything in between, so much so that we’re going back this summer,
Canada- at Easter you could do a fab road trip in the Rockies and ski if you fancy- we did dinosaur provincial park and drove up to Banff, lake Louise and jasper. The west coast whistler, Squamish and Vancouver island are also amazing.
we loved Borneo and Malaysia last year, so much to see and do and the marine and wildlife were incredible.
also loved our self drive around the Yucatan, swam with whale sharks, swam in cenotes, saw amazing Mayan ruins and went to the best natural lazy river.
my husbands all time favourite holiday was Peru, it’s so different, we went into the Amazon, saw Macchu Picchu, stayed in a homestay on Titicacca, magical!!
We’ve also had great holidays in Australia, again so diverse and lots to see and do.
ooh and Jordan, although that maybe a bit too similar if you’ve been to Oman recently.
other places on our list are Namibia, Brazil, Guatemala ( although our son is doing a school expedition now next year), South Korea but political situation a bit unclear, the Silk Road ( love the sound of your trip!), Chile and Ecuador.
happy planning!