7. Typing the city name instead of airport code

This might seem like a silly mistake, but it's easier to make than you might realize. (You booked a ticket to Portland, Maine, but want to go to Portland, Oregon.) AFAR reported that typing in an airport code instead of a city name can help you avoid a headache and excessive change fees or even the price of an additional ticket. If it's something you catch right away, it might not be a big deal, but if you don't realize your mistake until close to your trip (or even at the airport), it could be a major ordeal.

[Photo via Reshot]

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