By Commuter Train to Johanna's Place

Commuter trains K and N stop at Korso Commuter Train Station, which is close to my place (about 5-minute-walk).
If you travel with a commuter train from Riihimäki or Lahti towards Helsinki, you have to change trains in Kerava. Take a commuter train K or N from Kerava to Helsinki.
If you travel with a train from the west (from Turku, Kirkkonummi or Espoo), you have to change trains in Pasila. Take a commuter train K or N to Kerava.
If you travel with a long-distance train from the north to Helsinki, you have to change trains in Tikkurila. Take a commuter train K or N to Kerava.

Commuter trains K
(Helsinki-Kerava / Kerava-Helsinki)

Commuter trains K run every 20 minutes, in peak hours every 10 minutes.
K-trains towards Kerava
You can take a K-train at the following train stations (travelling time to Korso in brackets): Helsinki (27 min) - Pasila (22 min) - Oulunkylä (18 min) - Malmi (15 min) - Puistola (12 min) - Tikkurila (9 min) - Hiekkaharju (7 min) - Koivukylä (4 min) - Rekola (2 min).
K-trains towards Helsinki
You can take a K-train at the following train stations (travelling time to Korso in brackets): Kerava (7 min) - Savio (4 min).

During low traffic (on Sundays and part of Saturdays) there are Commuter trains N running every 30 minutes.
N-trains stop at every train station between Helsinki and Kerava.
Travelling time Helsinki-Korso with an N-train is 30 minutes.

My premises are located in an apartment block in Vantaa in Korso, very near to Korso Train Station. Vantaa is a city in Helsinki Region, to the north of Helsinki. Korso is in the northeastern part of Vantaa by the main railway line.
Map of Vantaa
Helsinki Region Map Service
I will tell you my exact address when we confirm an appointment.