When to buy a flight: the right window

For flights, timing is the opposite of hotels. Waiting until the last minute usually costs you more, not less. The trick is buying inside the right window: not so early that fares have not settled, not so late that they spike. Here is what the 2026 data says, and how to catch a fair price.

The booking window that works

Domestic and short-haul: about 1 to 3 months out

• The cheapest window is often 15 to 30 days before departure for domestic economy, per the Expedia 2026 Air Hacks report; around 30 days out tends to score the lowest average price.
• Aim to buy roughly 1 to 3 months ahead for short trips.

International and long-haul: about 2 to 8 months out

• The ideal window is roughly 2 to 8 months before departure.
• For peak periods (summer, the December holidays), extend it to 3 to 11 months and buy early.

Flights are the opposite of hotels

Do not wait for a last-minute flight deal

• Fares typically rise about three weeks before departure; last-minute is almost always the most expensive.
• This is the reverse of hotels, where a flexible last-minute booking can sometimes save (see our guide on when to book a hotel).
• Rule of thumb: book flights earlier, book flexible hotels later.

Myths and what actually matters

The cheapest-day-to-buy myth

• The idea that buying on a specific weekday (like Tuesday) is cheaper is largely debunked: the purchase day barely matters.
• What matters far more: your travel dates, demand and the booking window.

The cheapest days to fly are real

• Flying midweek (Tuesday, Wednesday) and avoiding the Friday and Sunday peaks is often cheaper.
• Early-morning or red-eye flights, and off-season dates, usually cost less.

How to catch a fair price

Use price alerts and flexible dates

• Set a price alert on a flight search tool for your route, so you are notified when fares move.
• Use the flexible-dates or whole-month view to spot cheaper days.
• Check nearby airports, for both departure and arrival.

Buy when you see a fair price

• Fares fluctuate; there is no perfect day. When a price is at or below the typical range for your route and inside the window, take it.
• If you use points or miles, look right when schedules open (about 10 to 11 months out) and again in the final weeks.

Your flight-timing checklist

• Short or domestic trip: aim to buy about 1 to 3 months ahead (often 15 to 30 days is cheapest).
• Long-haul or international: aim for about 2 to 8 months ahead; earlier for peak season.
• Do not wait for a last-minute flight bargain: prices usually climb near departure.
• Set a price alert for your route and watch flexible dates.
• Prefer midweek flights and check nearby airports.
• Found your flight? Lock in the trip by comparing hotels for your destination too, for example hotels in Tokyo or hotels in New York.

Good to know

How far ahead should I buy a flight? About 1 to 3 months for domestic and short-haul, 2 to 8 months for international; earlier for peak season.

Is it cheaper to buy flights last minute? Usually no; fares tend to rise about three weeks out. Last-minute deals are the exception, not the rule.

Is there a cheapest day to buy a flight? Not really; the buy-on-Tuesday idea is largely a myth. Your travel dates and the booking window matter far more.

What are the cheapest days to fly? Midweek (Tuesday, Wednesday) and off-peak dates are usually cheaper than Friday or Sunday.

Does Edenfinder compare flights? No; Edenfinder compares hotels. Use a flight search tool for fares, then compare hotels for your destination here.

Buy the flight inside the right window, with an eye on price alerts. Once the flight is set, search hotels to complete the trip at the best price.