Sometimes it is possible to get cheaper solutions by having a look at limited offers or at fidelity programs made available on the companies' websites.
When travelling on such short distances, you can take into account also busses and carpooling options: with some luck you will find very cheap options, even if you book on short notice.
Which stations are served by the trains travelling from Charleroi to Poperinge?
You can take the train to Poperinge at Charleroi-Sud / Charleroi-Zuid, which arrives at Poperinge.
What time do the trains to Poperinge leave and how long is the journey?
On average, it takes 4 hours and 36 minutes to get to Poperinge by train, but you will need 3 hours and 45 minutes with the fastest trains. The first one is available at 05:12, whereas the last one leaves Charleroi at 11:12.