Before booking a flight, travelers may want to bring spare change for increased airline prices. According to The Denver Post, Frontier Airlines will charge some customers $100 for their carry on bags at the airport.

In a new effort, the Denver-based carrier wants to steer passengers towards booking their air travel directly from its website. For customers who book a Basic fare from third-party websites, Frontier will increase charges for carry-ons by the summer.

Passengers booking flights directly from FlyFrontier.com will automatically receive a free carry-on. Purchasing from a third-party site in advance will costs customers $25 per bag, The Washington Post reported.

There is a distinction between a carry-on bag and a personal item. A carry-on bag has to be placed in the overhead compartment while a personal item can fit securely underneath a seat.

CEO of Frontier Airlines, David Siegel, released a statement concerning the increase in baggage fees.

"With this change, we are ensuring that our most loyal customers - Ascent and Summit level members of EarlyReturns, those who book Economy, Classic and Classic Plus tickets, including all customers who book through FlyFrontier.com, will have more space onboard the aircraft for their carry-on bags," said Siegel.

Frontier Airlines is making one more change that will affect customers. Travelers who lavished in complimentary beverages will have to pay up. According to The Washington Post, beginning July 1, travelers who purchased economy and basic fares will pay for all thirst-quenchers.

Frontier will charge $1.99 for coffee, tea, soda, and juices. Customers will be able to receive free refills of coffee after purchase.

Airline analyst, George Hamlin, expressed his sentiments of the airline's increase.

"You can't please everyone all the time. This will probably alienate some customers," said Hamlin.

"They are not looking for the frequent fliers who take a lot of flights at a cheapest level, but they are looking for a frequent revenue provider, which from a business standpoint is an intelligent approach."