“Journey mercies” is an older way of saying “traveling mercies,” which are prayers or good wishes for a safe and protected journey. The phrase expresses a hope for divine grace and guidance, especially on long or difficult trips, and has roots in Christian tradition, often used to wish missionaries well in the 19th century. While some may use “journey mercies,” the more grammatically standard phrase is “traveling mercies,” or simpler well wishes like “safe travels” or “safe journey”.Â