HENRICO, VA (WWBT) - Passengers at Richmond International Airport, are also feeling the effects of the failed terror plot.
Some, having to wait more than an hour just to make it through security.
Federal officials say they're tightening security for both domestic and international flights.
Those heightened levels will differ from airport to airport depending on alerts.
The spokesman at RIC says passengers probably won't see a huge difference but that doesn't mean TSA isn't making changes.
The threat level is orange, high risk of terrorist attacks.
But it's not like airline passengers needed reminders.
"The security I think everyone is expected it," said traveler Rebekah Milian.
Milian flew in from Detroit this afternoon, where less than 24 hours earlier panic erupted.
She waited in line at security there for about an hour, which she says is a little longer than usual.
Walking through the airport, she noticed some changes, including more bomb-sniffing dogs inspecting luggage.
"I've flown a lot so it was not like it was anything new or different but I think just having the dogs there, it raised everyone else's senses too," she said.
Passengers at RIC experienced lines off-and-on throughout the day.
Diane Becker's daughter was catching the first flight to Boston Saturday morning.
When they got to the airport, she says the line stretched from security all the way to the escalators hundreds of feet away.
"I've never seen anything like that before," she said. "I got a big knot in my stomach thinking: oh my God, Sara is going to miss her flight!"
Problem is there's no way to tell if those long lines and delays are because more people are flying the day after Christmas.
Those people are taking longer because they're less experienced travelers, or they're having to go through stricter security measures at checkpoints.
More than likely, it's a combination of all three.
After waiting for more than an hour, Sara got to the gate with just fifteen minutes to spare.
"It could have been even longer," said Becker. "The fact that they were making sure that my daughter was safe flying on that flight, I was ok with that."
Sunday is another busy travel day so because of those longer lines and possible increased security measures.
You're going to need to allow even more time to get through checkpoints.