The best day to book British Airways flights is Tuesday, particularly early in the morning. That’s when many airlines, including British Airways, publish competitive fares. Booking 6 to 8 weeks in advance is ideal for international flights. British Airways also offers frequent promotional fares in January, April, and October. Using the “Low Fare Finder” tool on their site can help you compare prices across a flexible travel window. Flying midweek—on Tuesday or Wednesday—often brings added savings. For help with Club World upgrades, Avios points, or finding fare classes, call +1-888-415-1245 (US) or 1-866-579-8033 (US). Joining the Executive Club rewards program also gives you early access to sales and personalized discounts.