British Airways computer problem strands 20,000

LONDON (AP) — British Airways canceled more than 100 flights to and from London airports on Wednesday after its check-in systems were hit by computer problems.

The airline said a "systems issue" was causing delays and cancellations for short-haul flights from Heathrow, Gatwick and London City airports.

British Airways said it was relying on backup and manual systems. It canceled 117 flights due to operate to or from Heathrow and 10 Gatwick flights, stranding about 20,000 passengers. More than 300 other flights were delayed.

"A number of flights continue to operate but we are advising customers to check ba.com for the latest flight information before coming to the airport," the airline said in a statement.

BA said short-haul passengers due to travel Wednesday could re-book for another day.

At Heathrow, Europe's busiest airport, passengers waited in snaking lines for information.

"There were massive queues," said Darren Rowe, whose flight to Hamburg, Germany, was canceled. "It was queue here, queue there. Nobody was saying anything. The lack of information was just pathetic."

The incident is the latest bout of tech trouble to hit the airline. In May 2017, tens of thousands of passengers were stranded when a global computer failure grounded hundreds of British Airways flights over three days. BA passengers were also hit with severe delays in July and September 2016 because of problems with the airline's online check-in systems.

RELATED: In 2017, massive IT failure grounds British Airways planes

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Massive IT failure grounds British Airways flights at London airports
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Massive IT failure grounds British Airways flights at London airports
Travellers wait stranded at Heathrow Airport Terminal 5 after British Airways flights where cancelled at Heathrow Airport in west London on May 27, 2017. British Airways said May 27 that it had cancelled all its flights out of major London airports Heathrow and Gatwick after an IT systems failure, warning people not to travel to the congested hubs. / AFP PHOTO / Daniel Leal-Olivas (Photo credit should read DANIEL LEAL-OLIVAS/AFP/Getty Images)
Travellers stranded wait at Heathrow Airport Terminal 5 after British Airways flights where cancelled at Heathrow Airport in west London on May 27, 2017. British Airways said May 27 that it had cancelled all its flights out of major London airports Heathrow and Gatwick after an IT systems failure, warning people not to travel to the congested hubs. / AFP PHOTO / Daniel LEAL-OLIVAS (Photo credit should read DANIEL LEAL-OLIVAS/AFP/Getty Images)
Travellers stranded wait at Heathrow Airport Terminal 5 after British Airways flights where cancelled at Heathrow Airport in west London on May 27, 2017. British Airways said May 27 that it had cancelled all its flights out of major London airports Heathrow and Gatwick after an IT systems failure, warning people not to travel to the congested hubs. / AFP PHOTO / Daniel LEAL-OLIVAS (Photo credit should read DANIEL LEAL-OLIVAS/AFP/Getty Images)
Travellers stranded outside the entrances of Heathrow Airport Terminal 5 after British Airways flights were cancelled are seen at Heathrow Airport in west London on May 27, 2017. British Airways said May 27 that it had cancelled all its flights out of major London airports Heathrow and Gatwick after an IT systems failure, warning people not to travel to the congested hubs. People outside the entrances said that they are not being allowed to enter the terminal. / AFP PHOTO / Daniel Leal-Olivas (Photo credit should read DANIEL LEAL-OLIVAS/AFP/Getty Images)
Travellers stranded outside the entrances of Heathrow Airport Terminal 5 after British Airways flights were cancelled are seen at Heathrow Airport in west London on May 27, 2017. British Airways said May 27 that it had cancelled all its flights out of major London airports Heathrow and Gatwick after an IT systems failure, warning people not to travel to the congested hubs. People outside the entrances said that they are not being allowed to enter the terminal. / AFP PHOTO / Daniel Leal-Olivas (Photo credit should read DANIEL LEAL-OLIVAS/AFP/Getty Images)
Travellers wait stranded at Heathrow Airport Terminal 5 after British Airways flights where cancelled at Heathrow Airport in west London on May 27, 2017. British Airways said May 27 that it had cancelled all its flights out of major London airports Heathrow and Gatwick after an IT systems failure, warning people not to travel to the congested hubs. / AFP PHOTO / Daniel Leal-Olivas (Photo credit should read DANIEL LEAL-OLIVAS/AFP/Getty Images)
People queue with their luggage for the British Airways check-in desk at Gatwick Airport in southern England, Britain, May 28, 2017. REUTERS/Hannah McKay
People wait with their luggage at the British Airways check-in desk at Gatwick Airport in southern England, Britain, May 28, 2017. REUTERS/Hannah McKay
British Airways planes are parked at Heathrow Terminal 5 in London, Britain May 27, 2017. REUTERS/Neil Hall TPX IMAGES OF THE DAY
People queue with their luggage for the British Airways check-in desk at Gatwick Airport in southern England, Britain, May 28, 2017. REUTERS/Hannah McKay
People queue with their luggage for the British Airways check-in desk at Gatwick Airport in southern England, Britain, May 28, 2017. REUTERS/Hannah McKay
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The airline is also set to be fined 183 million pounds ($222 million) by Britain's data regulator over a cyberattack on the airline's security systems last year in which the personal data of up to 500,000 customers was stolen.

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