6. Relying on online sources and booking services

Relying on online booking services isn't always a good way to find the best deal. In the piece that he posted on LinkedIn, Greenberg wrote that booking your ticket at 1 a.m. EST is one of the best ways to get a lower priced, bargain ticket, but that in order to actually take advantage of the deals, you'll have to call the airline and deal with them directly.

Work with customer service to get the lowest priced tickets when they're released back into the system, 24 hours after people who snatched up some of those tickets don't purchase them.

[Photo via Reshot]

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