That common belief that Tuesday is the best day to buy your plane tickets? Not so much. Really, not even close. ARC examined close to 1 30 million tickets worth $94 billion purchased in the U.S. during their 19-month study and found Sundays were clearly the best day to buy. Saturday is still better than Tuesday (11 percent better internationally. Isolated last-second cheap airfares are also available.
Despite all the research, U.S. travelers never learn. Domestic flights in the study were purchased 32 days ahead of the flight on average for domestic flights, with 24 percent of the tickets purchased in the final seven days before flying.
24 weeks ahead of departure, fares were a whopping 27 percent below the average fare .