Not enough information is supplied to answer this question. Who is "they"?
A lot of cities in Asia.
San Dieago
harrisburg, pennsylvania
Rochester ny
North America. They often like to fly in the mountains but sometimes enter cities.
All of the common ones!
For a complete list of cities that Allegiant Air, LLC's, aircrafts fly to, check out their website, allegiantair.com.
Montenegro Airlines fly to 13 cities. Those 13 cities are : Anacona , Zurich , London , Paris, Moscow , Rome , Bari , Frankfurt , Naples , Saint Petersburg , Nis , Tivat, Podgorica, Ljubljana , Brindisi, Belgrade , Copenhagen , Vienna.
You can't fly to any city that you haven't visited yet.
The Airline currently flies to 348 destinations NOT including code share cities.
an airport called "atlantiport" if you got an answer, let me know
two: Los Angeles & Honolulu