The best day of the week to book a flight is not set in stone, as flight prices fluctuate with demand and airlines may offer sales or adjust prices to match competitors. However, some trends suggest that Tuesdays and Wednesdays are generally cheaper days to fly domestically, with Tuesday being about 24% lower than peak prices on Sundays
. Another study found that flight prices on Tuesdays, Wednesdays, and Thursdays were 1.9% cheaper on average than flights on Saturdays and Sundays
. Ultimately, the best day to book a flight is the day when a flight deal pops up
. Therefore, it's advisable to keep an eye on pricing trends and be ready to book when prices drop
