Flight prices can feel different on another device because the booking session is easier to recognize than shoppers expect.
If the same trip suddenly looks more expensive on another device, the reason may not be provable personalized pricing. But travel sites can still react to repeat visits, device continuity, route comparison, urgency, and other signals that make a household look more ready to buy.
If you searched because a flight or hotel price suddenly felt different, start with the travel demo first. It shows one controlled booking moment without pretending to prove every price change.