New York's John F. Kennedy Airport tweeted about delays.
Passport systems in the United States are back online after a two-hour outage caused disruptions in some of the major airports on the New Year's Day.
"No one has been getting past JFK Airport immigration for the last hour".
Travelers at O'Hare International Airport were among thousands delayed at their destinations nationwide due to a technology glitch with U.S. Customs and Border Protection applications on Monday night, authorities said.
Other airports, including Denver International Airport, also said they were affected.More news: New Orleans Saints 14, Tampa Bay Buccaneers 13
CBP said it "took immediate action to address the technology disruption", CNN reported.
Approximately 2,000 passengers were stuck in line at Miami International Airport, where this video was filmed. 'At this time, there is no indication the service was malicious in nature'. Eastern time forced Customs and Border Protection officers to process arriving passengers using backup procedures at some airports.
The agency said it had access to the national security-related databases during the outage.
Although the systems are working again, San Diego travelers may still face a backlog of lines and delays.
The collapse has occurred in the system for checking the border control data at different airports.