Originally Posted by lilpisher

So, depending on how much you trust the folks you’re sending it to:

On united.com, click into your reservation and under the “cancel options” button there is a rather small “envelope” that allows you to email the reservation. It doesn’t include pricing information but does include your confirmation number. I’m pretty sure that a last name and confirmation number can get you nearly everything you need, so would be cautious about who gets their hands on it.

You can also use this to email yourself and delete the confirmation number before forwarding…