CHICAGO (WLS) -- Millions of Americans are preparing to fly for the holidays.

And the ABC7 Chicago I-Team looked at what travelers can do right now to avoid a nightmare, and still score some last-minute deals.

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"There is still time to buy. But we want people to take advantage of the fact that now is the time to buy. We're coming into that sort of last, final blip. Unfortunately, flights don't act like retail does where the bargain bins come out and flight prices magically drop the day or two before you are looking to travel," Going.com travel expert Katy Nastro said.

Nastro says you should buy holiday flights within the 21-day window at the latest, and there's one trick that could save you a significant amount.

"You can save be

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