Rail operator London Midland has said it expects to run all of its 520 services on Sunday.
Staff shortages have led to many cancellations over the past few weeks, with the government warning the company it is "monitoring the situation closely".
London Midland has said it expects to run a full service on Sunday and to have seven cancellations on Monday.
The firm has said it expects to be fully staffed by mid-December.
London Midland mainly operates services across the West Midlands but also runs services to Liverpool and London Euston.