Volcano in southern Iceland
Volcano in southern Iceland seen on April 17, 2010. Photo by AP
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BRUSSELS - The Icelandic volcano with the unpronounceable name reminded the world again that it has the power to disrupt international travel - coughing out a spreading cloud of ash that delayed or canceled hundreds of flights between Europe and North America Saturday.

The prospects for Sunday's flights remained grim, with no improvement in sight for transatlantic passengers, and with a plume of low-altitude ash continuing to float eastward over Spain and southern France.

Flights had to be rerouted north over Greenland or south around Spain to avoid the 1,200-mile-long cloud stretching from Iceland to northern Spain.

Around 600 airliners make the oceanic crossing every day. Roughly 40 percent were rerouted southward and the rest skirted Iceland from the north, according to Eurocontrol.

The disruptions to air traffic did not compare to the five-day closure of European airspace last month, which forced the cancellation of over 100,000 flights, stranded passengers around the world and caused airlines direct losses of more than 1 billion euros.

In Spain, 19 airports in the north, including the international hub Barcelona, were closed yesterday.

The country's airport authority said more than 670 flights had been canceled by 2 P.M. local time. Likewise, 125 flights in and out of Portugal were canceled up to noon.

On a normal day, European air traffic control centers handle between 26,000 and 30,000 flights.

Wind-dependent

Until Eyjafjallajokul, the volcano in southern Iceland, stops its emissions, the course of Europe's ash crisis will depend heavily on the prevailing winds. The eruption of the glacier-capped volcano has shown no signs of stopping since it began belching ash April 13. It last erupted from 1821 to 1823.

Aer Lingus canceled flights from the United States to Dublin, citing the exceptionally circuitous routes to get around the cloud.

Eurocontrol's forecast chart of volcanic activity for early today showed a solid line of cloud extending from Greenland to the Azores and Madeira Islands in the mid-Atlantic, at altitudes up to 35,000 feet - right in the path of most transatlantic flights. The Brussels-based air traffic management agency said the area of potential ash contamination was expanding in particular between the ground and 20,000 feet.

In Paris, Jerome Lecou, an engineer with the national weather service Meteo France, said the Civil Aviation authority was doing a flight evaluation with an aircraft equipped with sounding devices to gather a maximum of information to determine whether the closure of some airports may be warranted.