Lang Son is 154km from Hanoi, 60km from Thai Nguyen, 48km from Quang Ninh, 55km from Cao Bang, 73km from Bac Kan.

Road: National highway routes on the territory of Lang Son province:

- No.1A: It departs from Huu Nghi Quan (Friendship Gate) and runs through Lang Son Province to Hanoi.

- No.1B: between Lang Son and Thai Nguyen.

- No.4A: between Lang Son and Cao Bang.

- No.4B: from Lang Son to Tien Yen Townlet of Quang Ninh Province.

- No.31: between Dinh Lap and Bac Giang

- No.279: Binh Gia of Lang Son Province to Bac Kan.

Train: Hanoi-China international railway line with over 100km runs through Lang Son.