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All Scotland's airports are open but flights are still very disrupted and subject to change. Scottish airspace reopened from 0700 BST after air traffic control company Nats lifted restrictions.
But there were only a handful of domestic flights, mainly to the Scottish islands. Most international flights remained cancelled.
Experts are now assessing the impact on UK airspace of a new cloud of ash from the Icelandic volcano.
Thousands of passengers remain stranded as a result of the ban which has been in place for most of the country since Thursday.
Other airports across northern England could allow flights to operate soon but conditions are "rapidly changing".
The easing of the ban will not extend as far south as the main London airports.
Nats said passengers should contact their airlines to find out how the latest developments would affect their travel plans.
Glasgow Airport expected arrivals from Iceland, Northern Ireland and the Scottish islands during the day, while Edinburgh was flying to Belfast and the Scottish Islands.
The Scottish government helpline number is 0800 027 0504 or from overseas +44 800 027 0504 Note. The number will be live from 0900 BST on Tuesday.This article is from the BBC News website. ? British Broadcasting Corporation, The BBC is not responsible for the content of external internet sites.