The Queen Mary 2 (QM2), the world's only remaining true ocean liner, typically takes 7 nights (approximately 6 full days at sea) to complete a standard transatlantic crossing between Southampton, UK, and New York City. Unlike a cruise ship, which might take longer and hug the coast, the QM2 is built for speed and stability in the rough North Atlantic, featuring a deeper draft and a reinforced hull. Depending on the specific seasonal schedule in 2026, some crossings are marketed as 8-night voyages if the ship includes a stop in a secondary port like Halifax, Nova Scotia, or Zeebrugge, Belgium. The westbound journey (UK to USA) is popular because you "gain" an hour of sleep each night as the ship crosses time zones. The eastbound journey (USA to UK) is slightly faster in terms of actual travel time due to the prevailing winds and the Gulf Stream, but you "lose" an hour of sleep each night. It remains the most iconic way to travel between the two continents for those who prefer "slow travel" over flying.