Charter flights and seasonal flights are direct and one stop. Regular flights are with transition. Manchester-Heathrow-Sofia-Varna
with stopover at London 6 hours
The flight distance is 1,437 miles.
In Bulgaria
By direct flight 2 hrs and 50 minutes appx.
The population of Varna is 349,000 (according to Wikipedia).
If it is a chartered direct flight between abardeen and Sofia/Burgas or Varna then it will take 3 hour 54 minutes, Stopovers will add more time
A direct flight shouldn't take more than 3-4 hrs.
there are 2 main seaports. Varna and Bourgas
The distance from Piata Unirii in Bucharest to Varna's cathedral is 263 km. (road distance, not a straight line distance)
198 km. 123 miles of driving distance
There is a water park about 10-20km away from Varna. You can go by buss.
Varna