The World's Oldest Cruise Line Is An Iconic UK Treasure You Can Still Sail On Today

Long before cruise ships became floating resorts packed with infinity pools, theaters, and celebrity-chef restaurants, one British shipping company was already building the routes that would eventually help shape modern cruising. Its story began in 1837, when Arthur Anderson and Brodie McGhie Wilcox secured a government contract to carry mail between the United Kingdom and the Iberian Peninsula. Passenger service came later, but the shipping roots of today's P&O Cruises stretch back nearly two centuries, giving it claim to being the world's oldest cruise line still operating today.

Those early voyages of the Peninsular & Oriental Steam Navigation Company looked nothing like a modern vacation at sea. Ships were primarily used for transportation, carrying mail, goods, and eventually passengers between Britain and destinations farther afield. The company also became the first shipping line to transport tea leaves from China to Great Britain, strengthening its role in connecting Britain with destinations around the world.

By the 1840s, passengers on P&O Cruises were sailing from Southampton to destinations like Athens and Malta. Leisure travel gradually became a bigger part of the business, and in 1904, the company converted the mail steamer Rome into Vectis, a roughly 150-passenger vessel used for Mediterranean pleasure cruises. That evolution marked an important turning point. What began as a mail and shipping operation was slowly becoming something far more familiar to today's travelers: a journey taken not simply to get somewhere, but for the experience of being at sea.

The history of P&O Cruises demonstrates a diverse evolution into modern leisure travel. Its ships were called into service during both world wars, and the company spent much of its early existence moving mail, cargo containers, and passengers around a growing international network. But as transportation changed, so did the role of its ships.

Sea travel gradually moved from being the only way of crossing oceans to arrive at distant destinations to being a vacation in its own right — and even a permanent residence aboard a luxury liner. P&O continued adapting along with it, eventually becoming the cruise brand travelers recognize today. In 2003, the historic British line became part of Carnival Corporation following Carnival's combination with P&O Cruises. That places P&O under the same corporate umbrella as major cruise brands including Princess Cruises, Cunard, and Carnival Cruise Line, where travelers can ride the world's first ocean roller coaster.

Nearly two centuries after its story began, P&O Cruises now operates seven ships and says it carries more British vacationers out of the United Kingdom than any other cruise line. The fleet ranges from adults-only cruises like Aurora and Arcadia to newer, family-friendly vessels like Iona and Arvia. Iona marked another milestone when it entered service as P&O's first ship powered by liquefied natural gas, followed by sister ship Arvia. The technology has changed considerably since those early steam-powered voyages, but P&O's connection to British travelers remains at the center of the brand. 

Sailing with the world's oldest cruise line doesn't mean reenacting a Victorian-era voyage. P&O has evolved into a distinctly British take on contemporary cruising, with restaurants, entertainment, pools, kids' programming, and adults-only options spread across its fleet. Some of its newer ships also come with experiences that would have been difficult to imagine during P&O's early years. Iona introduced what P&O billed as the world's first gin distillery at sea, while Arvia takes the views to another level with its Altitude Skywalk, a high-ropes course suspended 177 feet above the ocean. Travelers looking for something more traditional can opt for the smaller Aurora or adults-only Arcadia, which is also used for P&O's lengthy world cruises.

The destinations have expanded just as dramatically. Current itineraries stretch from the Norwegian fjords to the Caribbean, with shore experiences ranging from city sightseeing to snorkeling, kayaking, and wildlife encounters. Motorsport fans can even explore parts of the Monaco Grand Prix street circuit in Monte Carlo, home to one of the top sporting events in the world. For travelers who care as much about the ship as the ports, that variety is part of the appeal. You can choose an adults-only escape, a family-friendly mega-ship, or a weeks-long journey connecting destinations across several continents. Nearly 200 years after its earliest voyages, one of Britain's most historic names at sea is still finding new ways to explore the world.