If you purchase multiple tickets in a single transaction, the price will be the same for each of the tickets. If not enough of the lowest-cost seats are available, you'll pay a higher cost for all of the seats. Buy the tickets one at a time to make sure you get all of the lowest-cost seats available.

Booking two separate one-way flights often costs more than a single round-trip or connecting flight due to airline pricing algorithms and "yield management." Airlines prioritize "round-trip" bookings because they guarantee the passenger's return business, allowing the airline to predict load factors more accurately. On international routes, one-way tickets are often priced as "point-to-point" fares, which are traditionally targeted at business travelers who require last-minute flexibility and are willing to pay a premium. Additionally, booking two separate tickets on different airlines (a "hacker fare") may seem cheaper at first, but it carries the hidden cost of separate baggage fees and the loss of "protected" connections. If your first flight is delayed and you miss your second separate flight, the second airline is under no obligation to rebook you for free. Essentially, you are paying extra for the lack of a "contract of carriage" that covers your entire journey from start to finish on a single reservation.