The primary benefit of booking a round-trip flight is usually cost, particularly for international travel. Airlines often price round-trip tickets significantly lower than two separate one-way tickets because it allows them to better manage their inventory and predict passenger volume. Beyond price, there is the convenience of having your entire itinerary under a single confirmation code, which simplifies check-in, seat selection, and managing potential delays or cancellations. If one leg of a round-trip ticket is canceled by the airline, they are generally responsible for re-accommodating your entire journey. Additionally, some countries require proof of a return or onward flight for entry, and a round-trip ticket serves as an easy way to satisfy immigration requirements. While one-way tickets offer more flexibility for travelers with uncertain plans, the round-trip model provides financial savings and peace of mind for those with a fixed schedule and a set return date.