Maine’s two largest commercial airports will get nearly $4 million from the Federal Aviation Administration to make improvements.

Portland International Jetport will receive more than $2.8 million to pay for an 8,300-square-yard expansion of the existing apron. That will allow for more use of the terminal aviation facilities at the airport.

Bangor International Airport will get more than $1.1 million to fund the installation of a new passenger loading bridge. The bridge will be used at the airport’s domestic terminal building.

U.S. Sens. Angus King and Susan Collins call the airport grants an investment in the future of airports that connect the state with the rest of the world.