A ground stop at William P. Hobby Airport was expected to last until 6 p.m., while a ground delay at George Bush Intercontinental Airport was expected to last until 9:30 p.m., according to the FAA.

After travelers endured delays of over three hours going through airport security over the weekend, Houston’s George Bush Intercontinental Airport (IAH) has worked to minimize the issue.

Travelers at IAH and Hobby Airport should expect long security lines due to TSA staffing shortages. Arriving early and being prepared can help you breeze through security and stay on schedule.

After hours-long wait times at Houston airports yesterday, here's what we noticed today and what the airport expects tomorrow.

The Federal Aviation Administration said Tuesday it issued a ground stop for traffic at Reagan Washington National Airport over a security issue. FlightRadar24, an flight tracking site, said the issue was due to an unconfirmed threat against a United Airlines airplane that had been moved away from other aircraft at the airport.

Photos shared with KPRC 2 shows the line for screening at Terminal E going outside the terminal and down the sidewalk. On Friday, the Houston Airports System alerted travelers to arrive early and prepare for long wait times at Bush Intercontinental Airport as the only TSA checkpoints open will be at Terminal A and Terminal E.

The government shutdown is taking a growing toll on air traffic controllers who are working without pay. Staffing shortages led to big delays over the weekend, raising concerns about travel chaos.

Airports across the country have already seen delays and cancellations due to staffing shortages as the shutdown continues.