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Travel influencers always share hacks on how to score cheap flights, from deleting your browser cookies, removing your internet history, or booking on certain days. Some claim that Tuesday is the best day to score deals on your holiday, but travel experts suggested another day may actually be cheaper.

Tom Vaughan, travel insurance expert at Confused.com, noted that booking early is still one of the smartest ways to secure better prices and a wider choice of flights, hotels and package deals.

"Popular destinations and school holiday periods can sell out quickly, so planning ahead can help travellers avoid higher last-minute costs," he said.

But he pointed to an Expedia report released last year, which found booking on one day could save travellers cash.

Air Hacks 2025 data found Sunday was officially the cheapest day to book flights, with savings of up to 22% compared to booking on a Friday.

It found travellers could save around 6% on domestic flights and up to 13% on international flights on average. The most expensive days were Monday and Friday, based on average round-trip ticket prices during the year prior.

But Mr Vaughan said if your holiday dates are flexible, it can also be worth thinking about when you travel rather than just when you book.

"Travelling outside peak summer months, such as in May, September or October, can often mean lower prices, fewer crowds and better availability.

"Even small changes to departure dates or airports can sometimes make a noticeable difference to the overall cost of a trip."

However, booking on Sunday may also not help around major events. Gilad Zilberman, CEO at SeatPick, a ticket search engine for live events, said the team see huge price surges driven by match demand, team popularity and stage of the tournament, rather than any 'best day' to buy.

"The World Cup is one of the clearest examples of how demand completely overrides traditional booking patterns. For major fixtures like knockout games or matches involving top nations, prices can rise across the board from tickets to flights to accommodation. Therefore waiting for a specific day of the week simply doesn't work, in this light."

"For fans or general holiday-goers, it's far more effective to monitor listings regularly rather than waiting for a so-called 'cheapest day', those who check often are the ones most likely to secure better value.

"Be flexible, pay attention to what's happening in your destination, and align your timing with local demand. If there are fewer events or peak travel triggers, prices are more likely to dip."