Two airports are nearby.
1) International airport DELHI is 400 kilometers from Uttarkashi. Anybody can hire a taxi (usually a small cab or tatasumo or innova) to Uttarkashi, the trip lasts around 12 hours. From the Delhi bus stand there are also plenty of buses to Rishikesh and occasionally to Uttarkashi.
- - From Delhi it is a 220 kilometer drive to Rishikesh.
- - From Rishikesh to Uttarkashi it is a scenic and hilly drive of 180 kilometres.
2)Second airport is the dehradun jauligrant airport. From there Uttarkashi is 200 kilometres taxi ride away. You can easily hire a taxi at the airport