how long should you wait before buying an airline ticket?
<answer> 54 days in advance, or 7 1/2 weeks on average. <context> It adds up to a database of 1.3 billion air fares — and a serious headache for those who were tasked with making sense of it! The simple answer is that in 2013 the best time to buy a domestic airline ticket was 54 days in advance, or 7 1/2 weeks on average. But before you send yourself a calendar invite 54 days before your next trip, read on; there is a lot more to the story.