Amadeus has its strongest market position in Europe, and the meltdown appears to have had less of an impact in the North America. Southwest Airlines Co said there had been widespread intermittent issues concerning its flights at Ronald Reagan Washington National Airport, but no major disruption. The technology company declined to comment on the extent of the disruption. Dublin airport said its systems were down for 12 minutes, while Manchester in northern England reported a 15-minute failure. The knock-on effect on flights would have lasted considerably longer, based on previous outages.