KLM and Lufthansa successfully carried out test flights while waiting for European skies to clear. Click here for the story.
But the ash unleashed by the eruption that began Wednesday shows no signs of abating; and the chaos continues as a result of the biggest airspace shutdown in Europe since World War II.
The French government on Saturday annouced plans to keep the airports in Paris and northern France closed until Monday; and many other European nations have also banned or lengthened their bans on air travel. Britain has extended a ban on most flights in its airspace until at least 1:00 PM on Sunday.
Eyjafjallajökull was now releasing ash in "pulses" rather than a steady plume, according to UK experts. But scientists cautioned that it was still too early to predict when the eruption would end.
The volcano's last major eruption, in 1821, lasted for two years.
More background information can be found here.