Port-to-port sea distance
Mongstad to Ulsan distance
The sea distance from Mongstad (Norway) to Ulsan (South Korea) is about 11,448 nautical miles (21,201 km), via the Dover Strait, Strait of Gibraltar, Suez Canal, Bab-el-Mandeb and Malacca Strait. At 12 knots that is about 39 days 18 hours at sea.
Distance
11,448 nm
21,201 km
Sea days @ 12 kn
39.7
39 days 18 hours
ECA miles
2,952 nm
26% of the route
Canals & straits
5
Dover Strait · Strait of Gibraltar · Suez Canal · Bab-el-Mandeb · Malacca Strait
Sea days by speed
| Speed | One way | Round voyage |
|---|---|---|
| 10 knots | 47.7 days | 95.4 days |
| 11 knots | 43.4 days | 86.7 days |
| 12 knots | 39.7 days | 79.5 days |
| 13 knots | 36.7 days | 73.4 days |
| 14 knots | 34.1 days | 68.1 days |
| 15 knots | 31.8 days | 63.6 days |
Steaming time only, with no allowance for weather, canal waiting or port time. The round voyage assumes the ship ballasts back on the same route.
Routes compared
Shortest route
11,448 nm
39.7 days at 12 kn · Dover Strait · Strait of Gibraltar · Suez Canal · Bab-el-Mandeb · Malacca Strait · 2,952 nm in ECA
See it on the mapVia the Cape of Good Hope (avoiding Suez and the Red Sea)
13,283 nm+1,835 nm
46.1 days at 12 kn · Panama Canal · 1,384 nm in ECA
See it on the mapAvoiding the Malacca Strait (via Sunda or Lombok)
11,982 nm+534 nm
41.6 days at 12 kn · Dover Strait · Strait of Gibraltar · Suez Canal · Bab-el-Mandeb · Sunda Strait · 2,952 nm in ECA
See it on the mapVia the Cape (avoiding both Suez and Panama)
14,743 nm+3,296 nm
51.2 days at 12 kn · Dover Strait · Sunda Strait · 931 nm in ECA
See it on the map- Since early 2024 many owners have kept their ships out of the Red Sea. Routing via the Cape of Good Hope adds 1,835 nm (about 6.4 days at 12 knots).
- Very deep-draft ships sometimes avoid the Malacca and Singapore straits and go through the Lombok or Sunda strait instead, which adds 534 nm (about 1.9 days at 12 knots).
Voyage estimates by ship size
About this trade
North Sea crude. North Sea grades loaded at Sullom Voe, Hound Point, Mongstad and Sture, moved short-haul into Europe or arbitraged long-haul to Asia.
- Typical ship sizes
- Aframax, Suezmax
Questions
How far is Mongstad from Ulsan by sea?
The sea distance from Mongstad to Ulsan is about 11,448 nautical miles (21,201 km), via the Dover Strait, Strait of Gibraltar, Suez Canal, Bab-el-Mandeb and Malacca Strait.
How long does a tanker take to sail from Mongstad to Ulsan?
About 39 days 18 hours at 12 knots, or 34.1 days at 14 knots. That is steaming time only; add time for port calls, canal transits and weather.
Which canals and straits does the Mongstad–Ulsan route pass?
The shortest route passes the Dover Strait, Strait of Gibraltar, Suez Canal, Bab-el-Mandeb and Malacca Strait. Alternative routings are listed above for ships that cannot or will not use them.
How much of the voyage is inside an Emission Control Area?
About 2,952 nm, or 26% of the voyage, is inside an ECA, where ships must burn 0.10% sulphur fuel or use a scrubber.
Terms on this page
Distances are calculated by Vessbook on a modelled global shipping-lane network for a tanker at 12 m draft, from berth area to berth area.
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