Yes book separately.

- 3€ Wroclaw - Vienna

- 3€ Vienna - Innsbruck (optional)

- 10€ passholder supplement for Innsbruck - Verona + 3€ reservation (shiny new train!)

- 13€ reservation for Verona - Venice (you can save money by taking the reservation-free regional train at 22:22 instead)

Unfortunately there are engineering works along the way this week (Semmering-Bahn) as usually it's much easier :/

- IC Wroclaw - Vienna 06:10 - 11:49

- RJ Vienna - Venice 12:24 - 20:05

Add Interrail as a discount and click on one-way tickets. It should be could Brenner Aufpreis.

Thanks, but how do you know when to choose an interrail discount and choose a regular ticket, and when to just buy a reservation without buying a seat?

You can always add Interrail as a discount and select one-way tickets. It's guaranteed to work.