Iceland had closed their main international airport and had cancelled domestic flights after their most active volcano, known as Grimsvotn, had started erupting.
A cloud of smoke had arisen 20km into the sky from the volcano.
But Iceland's Meteorological Office had reported that the eruption would not cause any widespread disruption to air traffic.
Last year, ash clouds from another Icelandic volcano, known as Eyjafjallajokul, had led to the closure of a huge area of European airspace.
Governments were fearing that the ash particles can cause the aircraft engines to fail, and the closure can cause chaos to air travellers.