ID90? If you're buying an ID90, you aren't jumpseating, you're non-reving. If you're just on a regular ZED/ID90 fare ticket like any airline employee(i.e. not occupying the jumpseat), then the destination doesn't matter. Either way, you have to pick an airline, get either a physical paper ticket or electronic ticket depending on the agreement your airline has with the carrier you choose, list with the carrier following the instructions put out by your carrier(usually a phone number which is often the airlines reservations or an employee specific line if they have one), then check in online(electronic) or in person at the counter/gate(paperticket) and wait for a seat like normal non-reving.
A few things to keep in mind if you're new to these other airline non-rev listings; an ID90 is you paying 10% of the FULL Y fare(which can often be more than discounted first class). ZED fares are a flat rate that go by mileage zones and are broken down into 3 categories(low/medium/high). More often than not, even a "ZED High" agreement will come out cheaper for you than an ID90. Any other "ID" discount such as ID75(75% off) will almost always be much higher than a ZED fare. I would recommend taking that into account. Also, when traveling on a ZED/ID90 vs jumpseating, you're usually not eligible for upgrades though ultimately it is up to the cabin crew once the doors close. Otherwise, it's just non-reving like every other non-pilot employee does.
