Friday Tops as Best Day to Book Flights for Savings

A new Expedia study reveals Friday as the cheapest day to book flights, offering up to 3% savings over Sunday, the most expensive day. For US domestic trips, Saturday edges out as the best booking day, while business class fares save most when booked on Saturday. Flying on Friday also unlocks the biggest discounts, up to 8% less than Sunday, with Tuesday leading for domestic flights at 14% below peak prices. July stands out as the top month to book, 18% cheaper than December.