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.

In 2026, data from major travel aggregators continues to show that Tuesday and Wednesday are generally the cheapest days of the week to fly out. This is primarily because mid-week days see a significant drop in demand compared to Fridays and Sundays, which are dominated by weekend travelers and business commuters. Because airlines utilize dynamic pricing algorithms, they lower fares on these "off-peak" days to fill seats that would otherwise remain empty. Conversely, flying on a Saturday can also occasionally yield lower prices, but Tuesday remains the most consistent winner for domestic and international routes. For a 2026 traveler, the "pro" strategy is to use flexible date calendars, as shifting a departure from a Monday to a Tuesday can often result in savings of 15% to 20%. Additionally, mid-week flights often mean less crowded airports and shorter security lines, providing a more relaxed start to your journey alongside the financial benefits.