London vs Dublin: which should you visit?

London is the bigger trip. Four to five nights fills a first visit with free national museums, Westminster, the Tower, a West End show and one or two day trips. It is a large city: expect 20–40 minutes on the Tube between clusters of sights, and a daily transport cost of roughly £8–15 (2026 estimate).

Dublin is the smaller, easier trip. Two to three nights covers Trinity College, Dublin Castle, St Patrick's Cathedral, the Guinness Storehouse and a night or two of live music. Most of the centre is walkable in 20–30 minutes, so you spend less time and money moving around.

The deciding factor is usually time and money, not quality. With a week, do London and add Dublin as a short second stop. With three or four days, Dublin alone is the better fit.

Both cities are expensive by European standards, and Dublin's accommodation often costs more per night than London's for a similar standard. London's advantage is volume: many free museums and parks, so a day can cost very little beyond transport and food. Dublin's advantage is compactness: fewer paid transfers, and day trips to the coast or the mountains are short rides away.

Choose London if you have four or more nights, want the widest choice of museums, theatre, food and shopping, and do not mind paying for transport and hotels. It suits first-time visitors to the UK who want the classic sights, families with children, and anyone who prefers a big city where you can fill a week without repeating yourself.

It is also the better base if you plan to add another UK stop by train, such as Edinburgh, York or Bath. London's airports and rail stations make onward travel simple.

Choose Dublin if you have two or three days, want a walkable city with a strong pub and music scene, and prefer a slower pace. It suits weekend breaks, travellers combining it with the Irish countryside, and anyone who would rather not spend a holiday on public transport.

Dublin also works well as a short add-on to a London trip: the flight is about 1h 20m, and the city centre is a 30–45 minute bus ride from the airport.

The two cities are close enough to pair. Fly London to Dublin in about 1h 20m, and allow half a day door to door once airport transfers are counted. A workable split is four nights in London and two or three in Dublin, or the reverse if you want to end in a smaller city.

Book the flight early for the best fares, and check whether your London airport is Heathrow, Gatwick, Stansted or Luton, since transfer times to the centre differ a lot. If you are coming from North America, Dublin often has cheaper transatlantic fares and US pre-clearance on the way home, which can make it the smarter first stop.

London and Dublin are about 460 km apart, and there is no bridge or tunnel: fly or take a ferry-and-road combination. Flights run many times a day from several London airports and take about 1h 20m. Ferries from Holyhead to Dublin take about 3h 15m, but you must first reach Holyhead from London, which adds several hours by train.