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The White House will unveil a new rule on Monday that will require airlines to be more transparent about add-on fees.

Under the proposed new rule, airlines and third-party travel sites that sell airfare would be required to immediately disclose fees related to changing or canceling a flight, choosing a seat, and for families to sit together. The idea is that when you see an airfare listed, you'll know what other fees are included.

The proposed regulations will be discussed by the President at the White House Competition Council meeting.

The extra fees passengers might have to pay are being targeted by the Biden administration. The ticket price is just one part of the cost of a flight, with some airlines and classes of service including extra fees if passengers want to check a bag, bring a full-sized carry-on bag on board or choose a seat.

The DOT said the extra charges can quickly add up and spike the total cost of the flight. The first time an airfare is displayed, airlines and third-party sellers would be required to reveal any fees.

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Pete Buttigieg said in a statement that airline passengers deserve to know the full cost of their flights before buying a ticket. The rule would require airlines to be transparent with their customers.

The rule would apply to both foreign and U.S. airlines.

The announcement comes just weeks after the DOT unveiled a new dashboard for airline passengers, which lists passenger rights to protections like rebooking and reimbursement in the event of cancellation or significant delays within the airline's control.

The Biden administration wants to place additional regulations on airlines, including those surrounding families being able to sit together on flights.

The trade group for the largest U.S. airlines said carriers already spell out all fees on their websites.

The airlines are committed to providing the highest quality of service, which includes clarity regarding prices, fees and ticket terms.

At a time when the DOT is gathering feedback on other potential regulations, travelers will have 60 days to weigh in on the proposed rule from the time it's filed in the Federal Register.

New information will be added to the story.