Warning: Do not buy airline tickets on Priceline I had a very negative experience with Priceline. They offer additional services such as baggage purchases and airline ticket upgrades, but they do not fulfill their promises. They only keep the ticket money and refund the payment values for baggage, forcing you to buy through the airline, which makes the purchase much more expensive. The customer service is inefficient. I spoke with two supervisors, Jess L and Daniel, but neither of them offered a solution. It's unacceptable that a company has so many supervisors in a call center and cannot effectively resolve problems. I do not recommend buying airline tickets on Priceline. It's an inefficient company that does not fulfill its promises.