It's all but certain that I'll be going to...

Meaning

The trip is highly likely to happen.

Examples

• John: Have you finalized your vacation plans?
• Alice: Almost. <b>It's all but certain that I'll be going to</b> Italy in the Fall.
• John: That sounds amazing. Enjoy!
• Alice: Thanks! Yeah, the tickets are almost booked; <b>it's all but certain that I'll be going to</b> Italy.