Thousands of Transportation Security Administration workers are set to be paid soon, potentially easing lengthy security lines that have hampered travelers at airports across the country.

President Trump on Friday ordered the Department of Homeland Security to pay T.S.A. employees, a move that would lessen the impact of weeks of airport security officers showing up to work without pay amid a partial government shutdown. Hundreds of T.S.A. officers have quit and absence rates have spiked at major airports, creating hourslong lines and missed flights for travelers.

Here’s what we know about paychecks for T.S.A. officers and other D.H.S. employees.

When will T.S.A. officers be paid?

About 50,000 T.S.A. officers should begin receiving paychecks as soon as Monday, the Department of Homeland Security said on Friday.

The announcement comes after Mr. Trump signed a presidential memorandum directing the department to find the funds to pay T.S.A. employees. He ordered the department to use funds that have a “reasonable and logical nexus to T.S.A. operations” to pay T.S.A. employees the compensation and benefits they would have earned since the partial shutdown began on Feb. 14.

A spokeswoman for the Office of Management and Budget said Friday that they would source the funds from money approved as part of the president’s tax package that Congress passed last year, which had included billions for immigration enforcement. But the White House has not specified the account.

When might airport lines ease?

T.S.A. workers who have been calling out of work because of child care and other challenges stemming from a lack of pay are likely to return soon once they get paid. But there is a bigger challenge: More than 450 T.S.A. officers have quit since Feb. 14, according to the Department of Homeland Security.