British Airways is experiencing yet another IT outage, with flights seeing significant delays.

The company said that its systems were not down globally, but flights across Heathrow Terminal 5 have been impacted.

Update: BA said in a statement: "We experienced a technical issue for a short time this afternoon which affected our operation at Heathrow Terminal 5.

"This has now been resolved and we're resuming flight operations. We've apologized to customers who have been inconvenienced." However, flights are still delayed due to the outage.

The airline experienced a widespread outage on February 25, that it stressed was not a cyberattack.

In 2017, more than 75,000 passengers were impacted by a British Airways IT issue - that time, one of the company's data centers suffered an outage, and services failed to shift to the backup facility. Months later, another BA IT failure caused major flight delays.

In 2019, at least 15,000 passengers across 84 flights had their journeys canceled due to a BA outage.

But, with air travel relying on a vast network of interconnected services, systems and technologies, BA is far from the only airline to have suffered outages.

2017 also United Airlines ground all domestic flights, and Delta ground 451 flights due to a “major system-wide network outage." A few months later, a fifteen minute software systems outage with online booking platform Amadeus Altea caused four hours of problems for multiple airlines. The year before, a Verizon data center failure caused JetBlue air travel delays.

More recently, 780 flights were delayed in 2019 when critical flight data provider AeroData suffered a systems outage.