Proof of onward travel means that airlines and governments want to make sure you are not illegally immigrating to their country, so they need to see proof of a return ticket home.
Airlines may impose certain sanctions including invoicing an additional amount up to the standard fare of the one-way alternative, deletion of mileage programs, etc. But, the probability of this is minimal, because such a breach can only be identified after the flights have departed.
A few countries definitely require documented proof of onward travel. They include New Zealand, United Kingdom, United States, Brazil, Indonesia, Costa Rica, Peru, and the Philippines.
But if you intentionally miss the last leg of the journey, your ticket won't be cancelled, as there is nothing left for the airline to cancel. If you skip the first flight, your return flight also gets cancelled. To avoid that, don't ever skip a flight on a return flight.
Should I Buy a Return Air Ticket Before Applying for a Visa? No, buying a return air ticket is not recommended before applying for a visa. Because if your visa gets denied, you will lose your money. We recommend getting a flight itinerary, and once your visa is granted, you can purchase a real travel flight ticket.
Proof of confirmed travel plans can be plane ticket confirmation, business letter, or employment letter from the business HR Department. You can submit a copy of your flight itinerary, plane ticket, plane e-ticket, or any other flight confirmation.
Can I enter the country with a one-way ticket? A18: Even if you are a passport holder from the U.S. or another country or region with a visa exemption arrangement with Japan, you are still required to have a return ticket or a ticket for departing Japan to a different country within 90 days.
Throwaway ticketing is purchasing a ticket with the intent to use only a portion of the included travel. This situation may arise when a passenger wants to travel only one way, but where the discounted round-trip excursion fare is cheaper than a one-way ticket.
In short, airlines charge more for one-way flights on the routes when they can get away with doing so. If only one airline is operating a particular route, it might increase the price of one-way flights to generate more revenue from business travelers and others that are willing to pay more for the nonstop flight.