British Airways PLC on Tuesday led a growing campaign against the British Airports Authority, which many carriers claim was ill-prepared for the emergency that led to hundreds of canceled or delayed flights.
A joint compensation claim against BAA, which operates seven airports around Britain including London's Heathrow, Stansted and Gatwick, could run as high as $570 million, based on analyst estimates of the airlines' daily losses.
Airlines say BAA was too slow to respond when the government imposed strict security checks on all passengers and a ban on onboard baggage last week after the discovery of a plot to blow up several airplanes on the trans-Atlantic route.
The alert crippled airport operations on Thursday, and BAA has struggled to get flight schedules back to normal since then.
Analysts estimate that the crisis could be costing British airlines a combined $95 million a day, putting the total costs at $570 million by the end of Tuesday.
BAA, which was recently acquired by Spanish construction giant Ferrovial SA for $19 billion, called accusations that it lacked adequate plans "neither fair nor accurate."
It pointed out that Heathrow, where much of the criticism has been leveled, was designed to cater to a maximum of 55 million passengers per year, but is currently handling 68 million.
"The fact is that Heathrow, the world's busiest international airport, is at the best of times significantly overstretched because of the difficulties over many years of securing permission to grow capacity at the airport," BAA said in a statement. "The scale and suddenness of the measures imposed last week could not be managed without significant disruption."
The airports operator kept bans on hand luggage in place for an extra day after the government eased the security threat level Monday. In a bid to ease congestion, it also ordered all airlines to cut their departures by 20 percent to 30 percent each day since the alert, with the threat of losing all their flight slots if they did not.
BAA lifted that requirement Tuesday, but British Airways again canceled 20 percent of its flights and said there would be more cancellations Wednesday. It blamed the scrapped flights on BAA's inability to cope.
The airline said it was actively considering whether to pursue BAA for compensation.
"Since 9/11, everyone in the industry has known there might be times when extra security measures needed to be put in place," British Airways Chief Executive Willie Walsh told the Daily Mirror newspaper. "Yet when the moment struck, BAA had no plan ready to keep the airport functioning."
Budget airline Ryanair Holdings PLC also canceled more flights Tuesday from Stansted, its key London airport.
"This morning, we had a situation where, despite assurances to the contrary, the staff were not in place," said Ryanair spokesman Peter Sherrard. "An hour before scheduled flights, there were still only half the 14 security points open."
Ryanair, which said it has seen a 10 percent drop-off in bookings since Thursday, said it was considering legal action against the government in order to reduce security screening delays at airports. It said it would consider compensation after it dealt with the current logistical issues.
It said the current restrictions, which still bar any liquids from being taken through security points, should be reviewed or alternatively police or army personnel should be deployed to speed up the screening of passengers.
Virgin Atlantic Airways said it was considering all options and was prepared to discuss compensation with BAA.
"Airlines have incurred substantial costs in the past few days, collectively running into millions of pounds and clearly we need to consider all the options for possible contributions to these costs, whether it be possible rebates, compensation or government support," it said in a statement.
However, no-frills carrier easyJet PLC said it had no plans to join in any attempt to sue BAA for compensation. Spokeswoman Samantha Day said BAA had dealt with the crisis as best as it could and the industry was better off discussing how to cope with future alerts.
BAA said it was working on the assumption that the current security regime would be maintained for the foreseeable future and it had begun working on bringing in additional staff and strengthening its security system.
The airport operator said it had added about 1,500 security guards to its security team since the Sept. 11, 2001, attacks, bringing the total to 6,000.
BAA owns and operates airports that handle 63 percent of travelers to and from Britain — a figure that rises to 86 percent in Scotland and to 92 percent in London.
Britain's competition watchdog is considering a detailed inquiry into the domestic airport market and whether BAA's dominance delivers the best value for air travelers.
A full probe by the Competition Commission could complicate any bid from airlines for compensation.