By Mike DeNardo

PHILADELPHIA (CBS) – With a major snowstorm on the way, people planning to fly out of Philadelphia International Airport over the next few days may be having second thoughts.

Air travelers might be looking at the forecast and saying ‘ahhhh…maybe not.’

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The major airlines servicing PHL have announced travel alerts that allow passengers to rebook their flights without being charged a change fee.

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American Airlines — the largest carrier at Philly International — is waiving fees for customers who want to change flights scheduled between today and Sunday. United and Delta are waiving change fees for travelers booked on flights from Friday to Sunday.

A Delta spokesman says the airline would rather allow passengers to rebook in advance, than have them arrive at the airport and discover their flight has been cancelled due to bad weather.

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As always, check with your airline for the fine print.