Delta Airlines computer glitches and outages over the years

2016:

_July 20 _ Southwest Airlines had a computer router failure that forced the cancellation of about 2,000 flights and the delay of about 7,000 more flights over three days. The company suffered a similar outage in October of 2015 that delayed 800 flights.

_July 8 _ United Continental grounded all of its flights worldwide for two hours, citing issues with a router. The airline had a similar issue in June.

_January 14 _ JetBlue delayed flights after power was disrupted during maintenance operations at a Verizon data center. The data center hosts the airline’s systems, including its website, mobile app and check-in systems.

2015:

_October 29 _ Alaska Airlines delayed about 20 flights because of a computer glitch. The problems impacted programs for check-in and pre-flight departure paperwork.

_September 17 _ American Airlines halted flights to several major U.S. hubs for about 2 hours because of connectivity issues. The glitch prevented passengers in Dallas, Chicago and Miami from checking in for flights, and customers may have been unable to make reservations.

_August 15 _ A technical failure at a flight control center in Virginia prompted widespread flight delays and cancellations throughout the northeastern US.