Validity of single ticket buyed online

[Ck1]

Hi, I want to buy online a ticket from Zurich airport to Lausanne for today. If I buy the ticket with dep at 16:15 and my flight is delayed can I use this ticket for a later departure eg 16:45? The prices are all the same but the trains have different directions and I want to ensure that I won’t have an issue. Thanks 

[FatimaH]

Hello @Ck1 

Thank you for your query.

The moderation team answers questions within 24 hours. For urgent queries, we recommend you to call us under the following telephone number: +41 (0)848 44 66 88 (CHF 0.08/min.) or go to a SBB ticket counter.

Normal price tickets are normally (unless they are regional tickets) valid for one journey throughout the day.

Kind regards,
FatimaH