A, I and L trains to Helsinki will not stop at Ilmala from Sat 31 March 10pm to Mon 2 April 5am due to construction works on the new Pasila station. However, the 5.14am I train from Helsinki Airport to Helsinki will stop at Ilmala as usual.
Alternative transport links
From Ilmala to Pasila or Helsinki:
Take an A or P train to Huopalahti and change to a train going to Helsinki.
Take bus 23 or 23N from the "Ilmalanrinne" or "Ilmalantori" bus stop.
From the direction of Huopalahti to Ilmala:
Take a train to Pasila and change to an A or P train going in the opposite direction.