Holiday travel is off to a bit of a bumpy start. Amtrak is experiencing significant delays in the Northeast and weekend weather conditions resulted in flight delays throughout the country.

In an advisory posted early on Monday morning, Amtrak explained that due to signal power issues, its Northeastern Corridor — from Washington D.C. to Boston — will experience “significant” delays.

“We have canceled select services to minimize delays. Unfortunately, there is no estimate for the resume of standard operating service,” Amtrak said in its notice.

The company also encouraged travelers to subscribe to its alert system as well as follow the Northeast Corridor X account for real-time updates.

The train disruptions come as holiday travel gets underway with 119 million people expected to travel from Saturday, Dec. 21, through Wednesday, Jan. 1, according to AAA.

As for air travel, passengers experienced delays throughout the weekend due to weather with hundreds of flights delayed from Boston’s Logan Airport, New York’s JFK and LaGuardia, and Chicago O’Hare, according to FlightAware.

San Diego International Airport also canceled hundreds of flights due to fog, NBC San Diego reported and Denver International Airport had nearly 500 cancellations over the weekend, according to local news outlet KVDR.

As of Monday morning, U.S. disruptions have decreased with 172 delays and two cancellations across the country, according to FlightAware’s Misery Map. Logan Airport is experiencing the most delays at 43.

Still, airports around the country have ramped up personnel in preparation for the busy holiday season with TSA Administrator David Pekoske sharing that the agency has hired 600 more agents in a Friday X post.

“But it’s still going to take time to make your way through the airport,” he added. “My advice? Arrive at your airport early, with plenty of time to park your car, check your bags, and make your way through security. Safe travels and happy holidays.”