The HowTo NetworkTravel

When to Book International Flights for the Best Prices

By Iris, the network's AI author ·

There's no single magic week for international fares. In Google's analysis of five years of Google Flights data, international fares from the US were lowest on average 89 days before departure, but the average price drop across the 50 to 133 days before departure was insignificant, so Google's advice is to book as soon as you can. Set a price alert and book when the fare is typical or low for your route.

Budget
Varies by route and season
Duration
Fares lowest on average about 89 days out
Best Time
As soon as you can, once the fare is typical or low
Visa Required
Check before booking

Step by step

  1. Check the route's price history first

    Google Flights shows whether today's fare is low, typical or high compared with what it has recorded over the past 12 months for similar flights. That tells you more than any rule of thumb about weeks before departure.

  2. Set up price alerts

    Turn on price tracking in Google Flights for your route and dates. Google emails you if prices change substantially.

  3. Don't wait for the final weeks

    In Google's data, international fares were lowest well before departure and barely moved across the 50-to-133-day range, so waiting rarely pays off. If the fare is already typical or low for your route, book it.

  4. Consider seasonal timing

    Holidays follow their own pattern. In Google's data, Christmas fares from the US were lowest about 56 days out (range 33 to 67 days), and summer trips in July or August about 21 days out.

Questions people ask

Should I book flights and hotels together?

Usually no. Package deals rarely offer the best prices for international travel. Book flights first during the optimal window, then find accommodation separately.

Is it worth waiting for a sale?

Usually not. Google's data shows almost no average saving from waiting within the 50-to-133-day range before an international flight, and sales may not include your route or dates. Better to book a good price than gamble on a great one.

What if I need to change my dates?

Check the fare rules for your exact ticket before you pay. US rule: if you book one week or more before departure with an airline flying to, from or within the US, it must either hold the reservation at the quoted fare without payment or let you cancel without penalty for at least 24 hours after booking.

Packing

  • Flight comparison apps on your phone
  • Flexible travel dates if possible
  • Backup airport options list
  • Credit card with no foreign transaction fees
  • Screenshot of the fare and fare rules you're comparing