Hurricane Earl is forcing airlines to adjust their stringent rebooking fees on account of delays.

Carriers are waiving costs to reroute or rebook passengers in order to keep up with changing weather patterns. At least 21 East coast cities have been directly affected.

Customers are being encouraged to postpone or reroute their travel to avoid expected delays through the holiday weekend. Passengers should check online with their individual carrier for fare details and flight status.

Despite Hurricane Earl, AAA predicts more than 34 million Americans will travel 50 miles or more this holiday weekend. That's 3 million more than traveled last Labor Day.

"It's really important for folks all up and down the Eastern seaboard to pay attention to the forecast, heed all advisories and warnings because this could potentially be a very dangerous situation," AAA spokesman Troy Green said.

One thing that's certain: it's a lot more expensive to travel this year. AAA said the cost of airfare is up nine-percent, car rentals are up six-percent, and hotel rates are up seven-percent.