Tuesdays and Wednesdays are the cheapest days to fly domestically. The cheapest days to depart if you're flying within the U.S. are midweek — generally Tuesday or Wednesday. For economy tickets, Tuesdays are about 24% lower than peak prices on Sundays, which translates to savings of about $85 per ticket.

Historically, Tuesdays and Wednesdays have been the cheapest days to fly, as demand from both business and leisure travelers is lowest mid-week. However, 2026 travel data shows a shift where Fridays are becoming increasingly competitive, sometimes dethroning the mid-week days for certain leisure routes. This is due to changing business travel patterns where professionals often head home earlier in the week, opening up Friday seats at lower prices. Conversely, Sundays and Mondays remain the most expensive days as they cater to the weekend-return and Monday-morning business rush. Seasonally, August has emerged as a particularly affordable month for travel, saving an average of $120 per ticket compared to December. For those looking to avoid both high prices and heavy crowds, Tuesday still remains the "Goldilocks" day for fewer airport queues and better chances of scoring a low fare.