One of the most popular perks for Washington D.C.'s power players is coming to an end, Fox News has learned.

After June 30, members of Congress, Supreme Court justices and certain diplomats will no longer be able to park in the special lot set aside for them at Reagan National Airport, just across the Potomac River from the Capitol.

The coming change has left some lawmakers and their schedulers apoplectic. The special lot has long enabled lawmakers to shave minutes off their trip to Capitol Hill for a crucial roll call vote — or to get a head start on their flights home for every congressional recess.

"When minutes count ..." one scheduler complained to Fox News Tuesday.

Lawmakers' special access to Reagan National was a key argument for keeping the airport open after the Sept. 11, 2001 terror attacks, when some argued it should be closed because of its close proximity to the nation's capital.

The airport is closing the lot as part of a $1 billion expansion project aimed at streamlining the movement of passengers through its terminals.

Once the lot closes, cars with government credentials will have to park in the airport's public garages, just like everyone else. However, lawmakers, justices and diplomats will not have to pay for parking — provided they remember to show their government ID to the garage's cashier.

Fox News' Chad Pergram contributed to this report.