Thousands of passengers face disruption after flights between the UK and Brussels were cancelled for two days following bomb attacks in the Belgian capital.
All flights at the city's main airport were suspended after two explosions in the departures hall.
The airport has confirmed that it will remain closed on Wednesday.
The airport will also be closed tomorrow 23 March. Tomorrow we'll evaluate & decide if @BrusselsAirport will resume operations on Thursday.
— Brussels Airport (@BrusselsAirport) March 22, 2016
The incident at Brussels Zaventem airport caused travel disruption in Scotland.
One flight left Edinburgh Airport for the Belgian capital at 8.30am this morning but it is not thought the plane was permitted to land at the bombed terminal.
Another scheduled flight leaving Edinburgh at 3pm has been cancelled.
A spokesman for Edinburgh Airport said the “situation is fluid and live”.
There are no direct flights to Brussels Zaventem airport from either Glasgow or Aberdeen.
All Eurostar trains to and from Brussels were suspended for most of the day, with services from London terminating in the French city of Lille.
The cross-Channel operator said two trains from London to Brussels would run "for those whose travel is a necessity".
A full service is expected to resume tomorrow, according to Eurostar.
British Airways said customers due to travel to Brussels up to and including March 29 can alter their booking.
Brussels Airlines, which serves a number of UK airports, also cancelled its services from Brussels for the next two days.
Security has also been stepped up at transport hubs in the UK.
A spokesman for Heathrow said: "In the light of events in Brussels Airport we are working with the police at Heathrow who are providing a high-visibility presence."
Gatwick issued a statement which read: "As a result of the terrible incidents in Brussels we have increased our security presence and patrols around the airport."
The Belgian authorities are advising against travel to Brussels, the Foreign and Commonwealth Office (FCO) said.
The FCO updated its own travel advice for Britons in the city, urging them to "stay away from crowded places and avoid public transport at this time".
Anyone who is concerned about family or friends in Brussels can contact the FCO's helpline on 0207 008 0000.
A spokesman for travel organisation Abta said British holidaymakers in Brussels should follow the instructions of the Belgian authorities, while those due to travel should contact their transport provider.
He added that although Belgium is a popular destination for UK visitors, March is "one of the quieter months for leisure travel".
Why are you making commenting on The Herald only available to subscribers?
It should have been a safe space for informed debate, somewhere for readers to discuss issues around the biggest stories of the day, but all too often the below the line comments on most websites have become bogged down by off-topic discussions and abuse.
heraldscotland.com is tackling this problem by allowing only subscribers to comment.
We are doing this to improve the experience for our loyal readers and we believe it will reduce the ability of trolls and troublemakers, who occasionally find their way onto our site, to abuse our journalists and readers. We also hope it will help the comments section fulfil its promise as a part of Scotland's conversation with itself.
We are lucky at The Herald. We are read by an informed, educated readership who can add their knowledge and insights to our stories.
That is invaluable.
We are making the subscriber-only change to support our valued readers, who tell us they don't want the site cluttered up with irrelevant comments, untruths and abuse.
In the past, the journalist’s job was to collect and distribute information to the audience. Technology means that readers can shape a discussion. We look forward to hearing from you on heraldscotland.com
Comments & Moderation
Readers’ comments: You are personally liable for the content of any comments you upload to this website, so please act responsibly. We do not pre-moderate or monitor readers’ comments appearing on our websites, but we do post-moderate in response to complaints we receive or otherwise when a potential problem comes to our attention. You can make a complaint by using the ‘report this post’ link . We may then apply our discretion under the user terms to amend or delete comments.
Post moderation is undertaken full-time 9am-6pm on weekdays, and on a part-time basis outwith those hours.
Read the rules here