Houston to Karachi shipping route.

Ships leaving Houston for Karachi head north and cover a sea distance of 9,589 nautical miles (17,758 km), via Suez Canal. The straight line between the ports is 13,652 km; coastlines and shipping lanes add the rest. On the way the vessel passes Strait of Gibraltar, Bab-el-Mandeb and Suez Canal, so canal transit fees and waiting time at the canal are part of every voyage.

Pure steaming time is 28.5 days at 14 knots. A carrier that slow steams at 12 knots to save fuel needs 33.3 days, and a fast 18 knot string about 22.2. Container transit time on a liner service is longer than the steaming time: ships call at other ports on the rotation, and cargo may transship at a hub. Add terminal time at Houston and Karachi to plan the full ocean transit time.

Red Sea security changes the sea distance on this lane. A ship sent via Cape of Good Hope sails 12,280 nm instead of 9,589 nm and spends roughly 8.0 extra days at sea. Ask your forwarder which routing the carrier uses: the booking price and the arrival date both depend on it.

2,746 nm of the route, 29% of it, lies inside North American ECA and Mediterranean Sea ECA. In an emission control area ships must burn fuel with no more than 0.1% sulphur or clean the exhaust with scrubbers. That fuel costs more, and carriers add it to the ocean freight bill as a low sulphur or ECA surcharge.

Container freight rates on Houston to Karachi move with fuel prices, ship capacity and the season. Compare several carriers before booking: the cheapest sailing is often the slowest one. At Karachi (PKKHI) carriers give about 5 free days before demurrage and detention charges start, so plan the truck or rail pickup before the box lands.

Of the 65 port to port routes from Houston in this directory, Karachi is the 42nd shortest. Closer destinations include Sydney (9,386 nm), Tokyo (9,373 nm) and Yokohama (9,362 nm).