United Airlines has blamed some of the issues on airport construction among other factors.
United Airlines Cancels More Flights This Fall — Here Are the Cities That Are Affected
United Airlines Scaling Back Flights at Newark Airport - WSJ
Nearly 700 flights are canceled across the US as travel chaos continues for an eighth day
Newark Liberty International Airport - Wikiwand
United Flight Turns Back After 'Disruptive' Passenger Sat in Crew Area
United Airlines will cut flights at Newark, LaGuardia airports - CBS New York
United to cut 12% of daily Newark flights to boost performance
United Airlines will cut 12% of domestic flights out of its Newark hub July 1
United Airlines flight from Newark passengers trapped for 7 hours
United Airlines Cancels More Flights This Fall — Here Are the Cities That Are Affected
United pilots reject contract deal that 'fell short
Why United Is Cutting 50 Domestic Flights per Day at Newark - AFAR