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Cheapest Month to Book International Flights From the US in 2026: Europe vs Asia vs Caribbean by Region

Austin Pua
Austin Pua
Travel Booking and Deals Editor, ShopBack

For US travelers in 2026, the cheapest booking month for international flights depends on the destination region and shoulder-season timing more than any universal 'book 8 weeks out' rule. Europe: book late January through mid-March for the shoulder-season floor on late-April through early-June travel (typical New York-London roundtrip $480 to $650 versus peak $900 to $1,300). Asia: book late August through October for late-January through March travel (New York-Tokyo $780 to $1,050 shoulder). Caribbean: book September through mid-October for late-August through October hurricane-season travel (Cancun $290 to $420). Fall shoulder (late September to mid-November US departures) is the annual global floor for most Europe and Asia routes; Caribbean floor is late August through October hurricane risk. Google Flights, Kayak, and Skyscanner price alerts on the specific route are the ground truth.

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Cheapest Month to Book International Flights From the US in 2026: Europe vs Asia vs Caribbean by Region | ShopBack Blog