What is the best day to buy airline tickets? Generally, Tuesday is the greatest day to purchase plane tickets. On Monday nights a lot of airlines post promotions and fare cuts which results in reduced pricing on Tuesday when other airlines match similar offers. By making your reservation during the week you may also steer clear of the weekend demand surge, which could drive up prices. The best deals are found when purchasing tickets for local travel 6–8 weeks in advance and international travel 2-4 months ahead of time. Being accommodating with your travel dates and times may help you obtain an even better deal. By keeping a check on the tariff and booking your ticket during the week you might be able to get the best rates on tickets.