The user claimed, in another tweet, to have waited about an hour to clear customs and immigration, and suggested other people were left queuing for even longer.
An outage hit the Customs and Border Protection's (CBP) computer systems and left worldwide travellers waiting in long lines at airports throughout the U.S. last night.
As of Monday at 9:30 p.m. airport operations returned to normal with fewer delays.More news: Mariah Carey gives us first meme of 2018
Other affected airports included John F. Kennedy International Airport in New York, Dallas/Fort Worth International Airport and Miami International Airport, according to media reports and the airports' social media posts.
CBP said "there is no indication the service disruption was malicious in nature".
The agency reported that it still had access to national security-related databases during the disruption, and all travelers were screened according to security standards.More news: Oakland Raiders Eyeing Jon Gruden
Approximately 2,000 passengers were stuck in line at Miami International Airport, where this video was filmed.
Shortly after the outage ended, the CBP tweeted, "All airports are back on line after a temporary outage of CBP's processing systems. Your patience is appreciated".
A spokesperson tells CBS News that Customs and Border Patrol has been contacted and are investigating.More news: 2017 at the Box Office
"30 minutes. The line to just process special assistance is wrapped around the corner".