Pattern –는 길(에): on the way to
–는 길(에) can be translated as “on the way to” and is used with a verb indicating movement to/from a destination.
뉴욕에서 오는 길이에요. I’m on my way from New York.
공항에 가는 길에 여권을 잃어버렸어요. I lost my passport on my way to the airport.
공항에서 돌아오는 길에 케이크 샀어요. I bought a cake on the way back from the airport.
Reference: Yeon, J., & Brown, L. (2011). Korean: A Comprehensive Grammar: Routledge.