AAA predicts nearly 80 million Americans will be traveling this year.
"I've never seen anything like it," one traveler told Action News.
RELATED: Thanksgiving travel and traffic: Best and worst times to drive and fly
"I can't believe this. I knew it was going to be long but I didn't know it would be this long," said James Williams from Harrisburg.
Wednesday is projected to be among the busiest travel days of the year at Philadelphia International Airport.
Travelers take to roads, planes and trains to get to holiday destinations
Enormous lines for security snaked through PHL in the throes of the Thanksgiving travel rush.
"I thought the girl was joking when she said all the way to the back," said Wendy Mungai, of West Philadelphia. "I thought that back -- she meant all the way around and around and around."
"I texted my parents and said 'Oh my God, I'm going to miss my flight,' and then I met this kind lady and she said it's going to move quickly and we moved a lot faster than I hoped for," said fellow traveler Chris Jones.
RELATED: Thanksgiving forecast: Where the snow, rain is headed this holiday week
About 94,000 people are expected to travel through PHL, prompting TSA to boost staffing.
"We offered our officers every opportunity to come in and work extra hours," said Gerardo Spero, with TSA. "We have non-screeners come out, like myself."
"This has been a busy travel year for us. We've been approaching our pre-pandemic numbers, so it's been great," said Heather Redfern, with PHL. "We've had an easing into that very busy travel period."
According to AAA, most will travel by car, with nearly 900,000 people in the greater Philadelphia area are driving to their holiday destination.
Several crashes have already snarled the roads on the busy travel day.
RELATED: Crashes on I-95 cause delays for commuters and holiday travelers in Philadelphia & Delaware
"We will feel a lot of that [Wednesday] between 1 p.m. and 5 p.m. as commuters mix with holiday travelers, mixed with last-minute grocery store shoppers," said Jana Tidwell, with AAA.
Officials are asking people to drive carefully on this Thanksgiving eve.
Amtrak also prepared for the travel surge by lengthening trains and adding additional staff, with ridership ramping up to pre-COVID levels.
"Ridership is growing, especially here in Philadelphia. We seen 23% growth from between 2022 and 2023. So, in 2022, it was about a little over 116,000, and now last year it was well over 143,000."," said Beth Toll, with Amtrak.
Despite the business, travelers felt the holiday cheer with airport staffers, who were putting smiles on people's faces.