The first regular passenger flight from Tajikistan to Uzbekistan in a quarter of a century was canceled on Monday.
A flight from Dushanbe to Tashkent by Tajikistan's Somon Air company, scheduled for February 20, was meant to highlight the restoration of unchartered civilian flights.
Tajikistan's Somon Air said Tashkent airport had notified it on Monday that the airline was not allowed to make the flight, without giving a reason.
Uzbek carrier Uzbekistan Airways, which operates the airport and is due to start its own flights to Tajikistan in April, had no immediate comment, Reuters reported.
Tajikistan and Uzbekistan agreed to resume flights, stopped in 1992, last month after the new Tashkent government sought to improve ties with its neighbors.
