It's a bit of a spontaneous trip.

Meaning

It's a trip planned at short notice.

Examples

• John: So, you're going to Rome next week?
• Alice: Yes! <b>It's a bit of a spontaneous trip</b>.
• John: Wow! That's exciting!
• Alice: I know! <b>It's a bit of a spontaneous trip</b>, but I'm really looking forward to it!