The Enterprise

Somewhere in the quiet drumlin country between Dundalk and Newry, the train crosses a line that has shaped a century of Irish history — and absolutely nothing happens. No halt, no barrier, no uniformed officer walking the corridor. Your phone hops to a different network, the road signs beyond the window change from kilometres to miles, and the buffet trolley carries on down the aisle. This is the only railway in the world that crosses the border between the Republic of Ireland and the United Kingdom, and the fact that you can now do it without noticing is, in its own understated way, the whole point of the Enterprise.

The train has been running since 11 August 1947, when the old Great Northern Railway launched it as the "Enterprise Express" — the name chosen to capture the enterprising determination to keep Dublin and Belfast joined despite the customs posts that partition had planted between them. It cut the journey from nearly four hours to a little over two, and it has been the flagship of the island's railways ever since, running on through decades of political upheaval when very little else did.

Today it is simply an excellent modern intercity. Since October 2024 it has gone hourly — fifteen trains a day in each direction — covering the 181 kilometres between the two capitals in about two hours and five minutes, with table seats, big windows and a coffee. At the northern end it now arrives at Belfast Grand Central, a vast new terminus opened in 2024, right in the middle of the city.

But do not let the everyday efficiency fool you: this is a Victorian masterpiece of a route. Twice on the journey the train climbs onto engineering of real magnificence — the Boyne Viaduct at Drogheda, striding thirty metres above the river, and the extraordinary Craigmore Viaduct near Newry, eighteen granite arches marching across a valley, the tallest railway viaduct in Ireland. Both were designed by the same man, Sir John MacNeill, in the 1840s and 1850s. Nearly two centuries on, the Enterprise still runs over them every hour, all day.

The journey starts at Dublin Connolly, the city's northern terminus, where the Enterprise loads under the long train shed and pulls out past the Victorian streets of the north inner city. Almost at once the line runs out to the coast, and for the first half hour you get one of the finest bits of urban railway anywhere — the track running right along the shore of Dublin Bay through Clontarf and Malahide, crossing the estuary on a low viaduct with wading birds below and the Howth peninsula out to the right.

Then comes the first great set piece. Approaching Drogheda the train climbs steadily, the town appears below, and you find yourself out on the Boyne Viaduct — a lattice of iron slung between tall stone arches, carrying the railway thirty metres above the River Boyne with the port, the estuary and the medieval streets laid out beneath you. It was the last link in the chain: opened in 1855, it finally joined the separate railways from Dublin and Belfast into a single through route. The iron spans you cross today were renewed in 1932 and thoroughly rebuilt again in 2015, but MacNeill's masonry is the original.

North of Drogheda the country opens into the rich farmland of County Louth, and the train calls at Dundalk Clarke, a handsome ironwork station and the last stop in the Republic. Beyond it the landscape rumples into the little rounded hills — drumlins — of the border country, with the Cooley Mountains and the Mourne Mountains rising blue to the east. And then, undramatically, you are in the United Kingdom.

Newry comes next, its station high above the town, and immediately afterwards the second masterpiece. The line strides out onto the Craigmore Viaduct near Bessbrook: eighteen arches of sixty-foot span built from granite quarried a few miles away at Goraghwood, running a quarter of a mile across the valley, the tallest arch standing 126 feet above the ground. Begun in 1849 and opened in 1852, it is the tallest viaduct in Ireland, and locals have always known it as "the 18 Arches". From inside the carriage you get the sudden sensation of flying; from the fields below it is one of the great sights of Irish engineering.

The last stretch runs through Portadown and the orchard country of County Armagh, then down the Lagan valley past Lisburn and into the suburbs of Belfast. The train ends at Belfast Grand Central, opened in 2024 — eight platforms, a bus interchange alongside, and the largest transport hub on the island. Two hours and five minutes after leaving Dublin, you step out into the middle of another capital city, having crossed an international frontier, two rivers and two of the finest viaducts in these islands, without once getting out of your seat.

Since October 2024 the Enterprise has run hourly, which makes it one of the most convenient international train services anywhere. There are fifteen trains each way Monday to Saturday, and eight on Sundays. The journey takes about 2 hours 5 minutes, a little longer on some services.

Southbound and northbound, the pattern is easy to remember: trains leave Dublin Connolly at :50 past the hour, and Belfast Grand Central on the hour.

Dublin Connolly → Belfast Grand Central (Monday–Friday, as of the timetable valid from December 2025):

…and hourly at :50 in between, from 05:50 through to 20:50.

Belfast Grand Central → Dublin Connolly (Monday–Friday): departures on the hour from 06:00 to 19:00, plus a late train at 21:00, arriving in Dublin at :13 past (for example, Belfast 09:00 → Portadown 09:30 → Newry 09:53 → Dundalk 10:13 → Drogheda 10:37 → Dublin Connolly 11:13).

Saturdays follow almost the same hourly pattern. Sundays are reduced: roughly eight trains each way, southbound from Belfast at about 08:05, 10:05, 12:05, 14:05, 16:05, 17:05, 18:05 and 20:05.

All trains call at Drogheda MacBride, Dundalk Clarke, Newry and Portadown; a few late services also stop at Lurgan and Lisburn.

Operators: Iarnród Éireann — irishrail.ie (opens in a new tab) — and Translink NI Railways — translink.co.uk (opens in a new tab). Check live times before travelling.

The Enterprise is a normal intercity service with normal intercity tickets — no compulsory reservation, but booking ahead online is much cheaper than paying at the station on the day. Because the train is run jointly by Iarnród Éireann and Translink, you can buy from either and the ticket is the same: Irish Rail if you are starting in Dublin, Translink if you are starting in Belfast or continuing on NI Railways. Standard has tables and power sockets; Enterprise Plus adds a larger seat and an at-seat service.

One practical note: you are crossing from the euro zone into the pound sterling zone, and the two operators' fares do not always convert to the same number, so it is worth comparing. There is no passport check and no customs stop on the train, though it is sensible to carry identification.

The Enterprise makes it easy to see two capitals in a day, and there is plenty worth stopping for in between.

The stops below are all on the line or a short bus from it, and a single ticket to Belfast lets you break the journey. Two of the line's own landmarks are covered elsewhere on this page — the Boyne Viaduct at Drogheda and the Craigmore Viaduct near Bessbrook, the latter best seen from the country roads around it rather than from the train.

With an hourly train and a two-hour ride, most people base themselves in one city and treat the other as a day trip — but both ends, and several places in between, reward an overnight stay.

Dublin has by far the widest choice on the island, from international hotels along the quays and around St Stephen's Green to Georgian townhouse guesthouses and a large hostel scene. Staying near Connolly station or the IFSC puts you a few minutes from the Belfast departures; the Temple Bar and Camden Street areas are livelier but noisier.

Belfast is smaller, cheaper and increasingly good. The Cathedral Quarter is the pick for atmosphere — restored warehouses, boutique hotels and the best of the city's bars and music — while the Titanic Quarter has newer waterfront hotels beside the shipyards, and the university end around Botanic has friendly guesthouses and B&Bs. Grand Central station is central to all of it.

In between, Drogheda makes a practical base for exploring the Boyne Valley and Newgrange, with a handful of town hotels and country houses nearby. Carlingford, near Dundalk, is a charming medieval village on the lough with small hotels and inns, and Newry or the Mourne villages suit walkers heading for the mountains.

We don't book accommodation and carry no affiliate hotel deals on this page — we would rather point you at the right sort of place and let you choose. For train times between the two cities, see the timetable above.