: Most tickets are bought online with credit/debit cards, though some services accept PayPal for added security.
: If you are traveling and don't have a printer, local print shops or internet cafes (often found every few blocks in urban areas) allow you to email a PDF for printing. Where to Buy Plane Tickets where to buy plane tickets
If your goal is to purchase the tickets themselves, you have several reliable options: : Most tickets are bought online with credit/debit