Virtually anybody can be a courier, however some companies require couriers to be at least 21 years old. You are usually allowed to carry on as much luggage as the particular airline will permit. If you're only acting as a courier on the outbound flight you can check baggage as normal on the return trip. Air courier companies utilize major airlines like TWA United, American, British Airways and other international airlines. Couriers have been allowed on occasion to upgrade to first class at their own expense.
All tickets are round-trip tickets except in rare cases.
You can save up to 85 percent of the regular airline ticket price. The range is all over the board, depending on the season and demand, but the discount is usually substantial. Most courier firms try to get at least 50 percent of the cost of the ticket if they are able. During the summer, rates are generally higher than any other time of the year, but you still fly cheaper as a courier than with other discount fares. In short, traveling as a courier should save you hundreds of dollars on each trip you take.