Bhutan has a limited number of airports and flight connections. The country has only one international airport, Paro International Airport (PBH), located in the Paro Valley. The airport is considered one of the most challenging in the world due to its high elevation and surrounding mountainous terrain.

There are a limited number of airlines that operate flights to and from Bhutan. The national airline of Bhutan, Drukair, operates flights to a handful of destinations including Bangkok, Delhi, Kathmandu, Kolkata, and Singapore. Bhutan Airlines is another airline that operates in the country, offering flights to Bangkok, Delhi, Kathmandu, and Kolkata.

The flight schedule of Bhutan is subject to change depending on various factors such as weather conditions, demand, and airline schedules. However, generally, flights from Bhutan to destinations such as Bangkok and Singapore are usually available once or twice a week, while flights to Delhi and Kolkata are more frequent.

It is important to note that flights to Bhutan are often expensive due to the limited number of airlines and the high demand for tickets. In addition, due to the high altitude and mountainous terrain, flights to Bhutan are often subject to cancellations and delays, especially during the winter months.

Overall, the flight schedule of Bhutan is limited, and travelers should plan their travel well in advance to ensure availability of flights and avoid any last-minute changes. It is also recommended to keep track of weather updates and airline schedules to avoid any inconvenience caused by flight cancellations or delays.