I booked a flight through Air Canada to the US from Mongolia. It turned out I needed a visa to transit through Canada I didn't know. So I couldn't fly. Since I don't have a visa, I think I will never use this voucher. You can use this voucher on any Air Canada flight also can use it for hotels, vacation packages, tours, and cruises in Mexico and the Caribbean. It's fully transferable and never expires. If you use Air Canada a lot or visit Mexico or the Caribbean often, you should get this!