(CNN) -- See an air fare you like, but not quite ready to commit? For a fee, Continental Airlines will let passengers lock in the price for up to seven days with no obligation to buy.
Customers can opt to hold a ticket for 72-hours up to seven days, with fees starting at $5 for a 72-hour lock-in period and $9 for the seven-day option. The airline introduced the offering, called FareLock, on Monday.
"FareLock is an innovative option for customers who need extra time to plan their travel before purchasing a ticket," said Chris Amenechi, managing director of merchandising, in a statement.
"This new option is another way that Continental is giving our customers more choices and more control over their travel experience."
The airline will still offer a free 24-hour flexible booking window that allows passengers to change or cancel reservations without penalty in that time frame.
The new lock-in offer is part of a series of optional add-ons airlines have been rolling out in an effort to increase revenue.
Baggage fees, a sore spot for airline passengers, have already pulled in $2.5 billion for U.S. airlines this year.
The FareLock fees are nonrefundable and are not applied to the ticket price. Advanced purchase requirements apply, according to Continental.com.