You'll need a government-issued photo ID (e.g., driver's license, passport) and your ticket or e-ticket. For the smoothest check in, bring your ID and your confirmation email we sent you after you booked your plans. You can check in and get your boarding pass at the airline ticket counter. Curbside check-in and check-in kiosks also may be available. Most airlines will also allow you to check in online 24 hours in advance of your scheduled departure to obtain/confirm your seat assignments and obtain boarding passes. Instructions can be found on the individual airline's website. Hotwire customers can check in any way they like.
Traveling internationally? Be sure to check you have the proper documents for entry/re-entry into a country (e.g., correct visa(s), valid passport). You are responsible for ensuring that you have all necessary travel documents. See also: What documents do I need to travel outside of my country of citizenship?
We strongly recommend that you travel with your confirmation email we sent you after you booked because it has your Hotwire itinerary number and all the contact numbers for the travel suppliers you booked with Hotwire.