Way to Himachal

By plane
Shimla, Kullu (for Manali) and Kangra or Pathankot (for Dharamsala) have small airports, with services largely limited to Delhi. Flights are frequently cancelled or delayed by adverse weather. In addition the airport in Pathankot (Punjab) can be a convenient connection for Dharamsala and Dalhousie.

By train
Few points in Himachal are easily accessible by train, but there are narrow-gauge railways from Pathankot (Punjab) to Kangra and Kalka (Haryana) to Shimla. This will take you through beautiful rural Himalayan regions. The ride beyond Kangra is amazing. You ride along the Dhauladhar range of the Himalayas via Palampur and Baijnath to Joginder Nagar. The region is criss crossed by rivers and streams.

By bus
Bus is the only practical means of getting to many points in Himachal. All cities of interest have direct services to Delhi, and the Dharamsala-Manali-Delhi triangle is fairly well served. Note that travel times are long and the roads often hair-raisingly hilly.