In 2026, travel data indicates a significant shift in the "cheapest days" to book and fly on Expedia, largely driven by changing patterns in post-pandemic business travel. For booking flights, Friday has emerged as the most affordable day of the week to secure a ticket, offering savings of about 3% compared to the most expensive day, Sunday. When it comes to the actual day of travel, Tuesday and Wednesday remain the gold standard for low fares, particularly for domestic routes where flying mid-week can be up to 14% cheaper than weekend departures. For international travel, Friday has also become a surprisingly affordable departure day as airlines look to fill seats left empty by the decline in traditional Friday-to-Monday business trips. For hotel bookings on Expedia in 2026, Tuesday is typically the cheapest day to check in, while Friday and Saturday command the highest premiums. To maximize savings, Expedia's 2026 "Air Hacks" report suggests booking domestic flights 15–30 days out and international trips roughly 30–45 days in advance.