WASHINGTON — Two area airports saw record breaking passenger counts last year.

Taking the biggest piece of the passenger pie was BWI Marshall Airport, which saw 25.1 million passengers in 2016. Also breaking previous records was Reagan National Airport which served 23.6 million people last year.

Dulles saw a small spike in passengers, with a grand total of 21.8 million. The Washington Post reports that international travelers fueled the gains at Dulles International Airport.

In all, 70 million air travelers flew into and out of BWI Marshall, Reagan National and Dulles.

[related_gallery align=”right”]The higher traveler counts were aided by more people choosing to take flight nationally. In 2016, the Bureau of Transportation Statistics said 929 million packed up and took flight. That uptick is a 3.5-percent increase over 2015.

Some of the passenger gains are due in part to more flights, including low-cost flights into the area’s airports. Also, many area airports have spent and will spend millions renovating and expanding terminals in order to offer more services and a more efficient processing of passengers.

For BWI Marshall, improvement includes a $60 million project to expand its international terminal. Reagan National has announced a $1 billion make over which will be used to expand the passenger screening area and for a new concourse.