Wednesdays and Thursdays are the cheapest day to fly internationally. Meanwhile, international flyers would be wise to leave on Wednesdays, which are the cheapest day to depart for an international trip. That said, there isn't a huge difference in price across the different days of the week.

For international travel, the least expensive days to fly are almost universally Tuesday and Wednesday. Because most business travelers prefer to fly on Mondays or Fridays, and leisure travelers opt for long weekends starting Thursday or Friday, the middle of the week sees a significant drop in demand. Airlines use dynamic pricing algorithms to lower fares on these "off-peak" days to fill seats. According to historical data and 2026 travel trends, flying on a Wednesday can save you anywhere from 10% to 20% compared to a Sunday flight. Additionally, the time of year plays a massive role; for example, flying to Europe is cheapest in late January or February, while flying to Southeast Asia is often least expensive during the "shoulder seasons" of May or September. Beyond the day of the week, booking your flight roughly 3 to 6 months in advance for international routes is the "sweet spot" to secure these lower mid-week rates before the inevitable price hikes closer to the departure date.