Your ticket number can be found in the "Fare Details" section of the email receipt and itinerary that was sent to you when you first made your booking. 😊
Good to know
Hopper does not send physical plane tickets in the mail. Not to worry! All you need to check in for your flight is your Hopper confirmation code and your travel ID (such as a passport). Once you check in for your flight 24 hours before departure, the airline will provide you with your boarding passes.