Depending on when you are travelling and the amount of traffic, particularly around Dublin, it could be done in 90 minutes.
Bus is your only real option. Monaghan is not served by rail and you cannot fly there. So to get from Dublin to Monaghan and Monaghan to Armagh, your only option is by road. From Armagh city to Belfast is also only served by bus. There is a rail line between Belfast and Dublin, so that part of the journey has additional options.
Dublin is the closest of the three places mentioned.
Depending on when you are travelling and the amount of traffic, you can do it in about an average of 2 hours.
There are no direct flights from Dublin to Sardinia. So the journey takes more than one flight. The flying time would be about 3 hours, but there could be a time between the flights which makes the total journey time longer. So it will depend on what combination of flights you get. You would easily make the full journey on the same day.
5 counties border Westmeath. They are Roscommon, Longford, Meath, Offaly and Cavan.
The flight time from Dublin in Ireland to Amsterdam is approximately 13 hours and 9 minutes. The exact travel time will vary as it depends on factors such as weather conditions, flight speed, refuelling stops and delays. Your airline can provide additional information.
It is about 117 kilometres or 73 miles between Donegal town and Monaghan town. It would take about 2 hours to drive. Donegal is a large county and Donegal town is one of the nearest points to Monaghan, so if you were travelling from other parts of Donegal, it could take a lot longer and you could add another hour or more to the journey.
If you are talking about Euston Station in London, to Dublin port, then it would be an international journey so you may need a passport. It will depend on your nationality. If you are talking about Heuston Station in Dublin to Dublin port, then it is a journey within Ireland, so that journey itself would not require a passport, but you may have needed one to get into Ireland in the first place.
Dublin in Ireland is on Greenwich Mean Time.
On Friday the 17th of May, 1974 a number of bombs exploded in Dublin city centre and the town of Monaghan. Twenty-six people (including a French and Italian citizen) and an unborn baby lost their lives. Parnell Street, Talbot Street and South Leinster Street were devastated in the Dublin bombs which happened at about 5:30pm. Ninety minutes later, a fourth car bomb exploded outside Greacen's Pub in North Road, Monaghan town where a further seven people died. This was the greatest loss of life in a single day of the Troubles, including even the Omagh atrocity of 15 August 1998. It is believed Loyalist paramilitaries were responsible for the bombs.
There is no direct train journey from Dublin to Glasgow. There are a wide variety of ways you can make part of the journey by train. You could get a train to Belfast and then a ferry from Larne to Stranraer, and then a train to Glasgow. You can fly from Dublin to Prestwick, and get a train from there to Glasgow. You can get a ferry from Dublin to Liverpool and travel by rail to Glasgow that way. As there are many different options, then there is no single answer to your question.
It is in the north of Ireland, but not in Northern Ireland. What is known as Northern Ireland contains 6 of the 9 counties of the province of Ulster. Ulster is the northern province in Ireland. Monaghan is one of the 3 Ulster counties that are not in Northern Ireland. It is in the southern part of Ulster. See the maps at the links below.