London, England (CNN) -- British Airways was able to get three out of four planes to their destination this weekend despite the ongoing strike by cabin crew, the airline's CEO, Willie Walsh, said Sunday. Walsh told CNN he was "clearly disappointed for customers who have had disrupted travel plans but I'm really pleased that we have been able to do so much and we are determined to keep this going. "We have had high numbers of cabin crew turning up for work. We wouldn't have been able to fly such a significant operation if we didn't have cabin crew supporting us," he said.
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British Airways: "We will fly more than 75 percent of customers booked to travel"
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At least 51 BA flights leaving Heathrow Sunday were listed as canceled
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BA cabin crew members in dispute over pay and working conditions
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Airline and Unite union have been at odds for more than a year over planned changes
At @placeholder's Heathrow Airport, BA will be able to run up to 55 percent of its short-haul flights and up to 70 percent of its long-haul flights, the airline said.