Key Takeaways. 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.

Yes, one person can buy two tickets for themselves on the same flight, but the process and benefits vary by airline. This is common for "passengers of size" who require more physical space, musicians traveling with large instruments (like a cello), or people carrying high-value fragile items. Most airlines require you to book the second seat as a "Comfort Seat" or "Extra Seat" rather than using a fake name, as duplicate bookings under the exact same name for one passenger often trigger an automatic cancellation by security systems. Usually, you must call the airline's customer service to link the seats correctly. While you pay for two seats, you typically do not get double the baggage allowance, as baggage is often tied to the "person" rather than the "seat" (though budget carriers like IndiGo sometimes offer increased weight for extra seats). You will receive two boarding passes—one for you and one for the "Extra Seat"—to ensure the crew knows the seat next to you should remain empty.