Here's how far in advance you should book your flight

For domestic flights, the typical pattern is that flights first open for sale with fares on the higher side.

The period when you're most likely to score savings is during the "Prime Booking Window" of between 21 and 112 days before your trip. According to CheapAir, the timing of this period has been pretty consistent every year.

It's also important to keep in mind that airfare predictions can often contradict themselves, and fares are tricky to predict. You can also sign up for price alerts on sites like Airfarewatchdog.com.

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