Yes. To ensure you have enough time to arrive at the airport, check in for your flight, and go through security, we will ensure that you have at least the following amount of time between completing your booking and your flight departure:

Domestic flights: 5 1/2 hours
International flights: 7 1/2 hours

Also, remember that international destinations may require travel documents such as a current passport, proof of citizenship, or an entry or transit visa. These requirements may affect your ability to book same-day travel. For example, travel to Australia must be booked at least one day in advance of departure, in order to allow enough time to issue an electronic visa. 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?