I'll be travelling on the train (PKP Intercity) from Bydgoszcz to Warsaw Central to catch a mid-afternoon flight from Warsaw Chopin airport (LOT Airlines to Heathrow). Is a two-hour window between the train's scheduled arrival time and the flight's departure time likely to be sufficient, given that I need to check a bag? Is there a high risk that the train will be delayed? I'm happy to go by the quickest method (which I imagine would be a taxi?) even if it costs more.