Keflavik International Airport in Iceland re-opened on Monday following a three-day closure due to volcanic ash clouds from the Eyjafjallajokull volcano, which earlier brought European air travel to a halt.
Iceland's main international airport had been closed since Friday after easterly winds began blowing ash from the volcano toward the capital, Reykjavik.
Icelandair began operating both arrival and departure flights from Keflavik to Glasgow once the closure was lifted.
The airline will fly three flights to Glasgow and one to Orlando from Keflavik today.
Iceland Express will also operate flights to Copenhagen, Berlin and Brussels from Keflavik.
Iceland was initially unaffected by the volcanic ash as winds blew the ash southeast towards Europe, causing the shutdown of major European airspace, the cancellation of 100,000 flights and more than $2bn's worth of loss to the airline industry.