Though there's no set time or date that's always cheapest to book, there's still a period when cheap fares are most likely to pop up. I call these Goldilocks Windows. For domestic flights, the best time to book is normally 1 to 3 months before your travel dates. For international trips, it's 2 to 8 months prior.

To book the lowest fares in 2026, the "Golden Rule" is flexibility and timing. Use metasearch engines like Skyscanner or Google Flights to view the "Whole Month" and identify the cheapest days to fly—typically Tuesdays and Wednesdays. Experts recommend booking domestic flights 1–3 months in advance and international trips 2–8 months ahead. Additionally, signing up for fare alerts from services like "Going" (formerly Scott's Cheap Flights) can help you snag "error fares" or flash sales. Another pro tip is to search in Incognito Mode to prevent price tracking and to consider "open-jaw" tickets (flying into one city and out of another). Always check if a budget airline’s "low price" includes hidden fees for carry-on bags or seat selection, as these can quickly make a "deal" more expensive than a full-service carrier.