Short answer: 6-8 weeks before departure for short-haul Europe, 3-4 months for transatlantic, 5-6 months for Asia. Tuesdays at 3 PM is when airlines release new fares — check prices then. Avoid booking on Fridays (highest demand). January, February, and November are the cheapest months to fly almost anywhere. Our data shows prices spike 40% in the 2 weeks before departure on popular routes. Below: browse our 5,063 routes to compare monthly price trends.
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