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travel
When to Book Flights for the Lowest Price
The Goldilocks window — book domestic flights 1-3 months out, international 2-8 months out. Everything else matters less than you think.
- Domestic flights: book 1-3 months out. Google Flights data shows the sweet spot is about 39 days before departure, with a low-price range of 23-51 days.
- International flights: book 2-8 months out. Lowest prices start at 49+ days; Europe trips are cheapest 48+ days before departure.
- Day of week barely matters for booking — Tuesday is only 1.3% cheaper than Sunday. But flying Monday-Wednesday saves about 13% vs weekends.
- Cheapest months by season: January (winter), late April-May (spring), August (summer), September-October (fall). Track your specific route.
The biggest mistake travelers make is thinking there’s one magic day of the week to book flights. There isn’t. What actually matters is booking within the right window.
For domestic flights, the sweet spot is about 39 days before departure, with prices typically lowest between 23 and 51 days out. For international trips, the window opens wider — 2 to 8 months before departure, with fares lowest 49+ days out.
The day you book barely matters. Google Flights found Tuesday was only 1.3% cheaper than Sunday. But the day you fly matters a lot — Monday through Wednesday are about 13% cheaper than weekend flights.
Seasonality varies by route, but the general pattern is consistent: January for winter travel, late April through May for spring, August for summer, and September through October for fall. Track your specific route with price alerts rather than relying on a single magic number — but these windows are a reliable starting point.