Delta Air Lines grounded its domestic fleet Sunday night due to a "systems outage" that was causing departure delays, the airline said. Delta teams are working to fix a systems outage that has resulted in departure delays. *RD ? Delta (@Delta) January 30, 2017Jeremy Webb told NBC News his flight from Los Angeles International Airport to Maui, Hawaii, was held on the tarmac for an hour and a half. ? Delta (@Delta) January 30, 2017Delta said in a tweet that the outage was preventing customers from logging into their accounts with the airline. International flights and flights in the air Sunday night were not affected by the stoppage, the airline said in a statement at 8 p.m.