Tips to Book Air Flight Tickets Online To save money and avoid long lines at the airport, book your air flight tickets online. There are many websites that offer discounted air flight tickets. You can easily search for airline tickets and find the lowest airfares. You can also add hotels and car rentals to your air-flight tickets. Some airlines even offer upgrades, which you can take advantage of when you are checking in at the airport. Here are a few tips to book your air flight tickets.