There are several ways to reach Tsakhkadzor from "Zvartnots" airport.

For example, you can get there in the following way: from the airport you can take a bus to the Yerevan Northern Bus Station and then a minibus
( 15 USD) to Tsakhkadzor.

Also one can take a taxi ( 60 USD) in order to get to Tsakhkadzor straight from the airport.