The islands around the Scottish Highlands are some of the most remarkable places in Europe. Getting to them involves ferries, and knowing how the system works makes the difference between a smooth adventure and a stressful scramble on a wet pier.

The Two Main Operators

CalMac: Gateway to the Hebrides

Caledonian MacBrayne, universally known as CalMac, operates the ferry network connecting the Inner and Outer Hebrides. This means routes to Skye (technically now bridged, but CalMac still runs to Raasay off Skye), Mull, Islay, Jura, Colonsay, Arran, Barra, South Uist, North Uist, Harris, and Lewis.

CalMac runs everything from the small 15-minute hop from Oban to Kerrera to the long crossing from Ullapool to Stornoway (2.5 hours) and from Oban to Barra (around 5 hours).

For most Hebridean islands, CalMac is your only option and your lifeline.

NorthLink Ferries covers the northern archipelagos. Key routes:

  • Scrabster to Stromness (Orkney Mainland): around 1.5 hours through the Pentland Firth
  • Gill's Bay to St Margaret's Hope (Orkney): around 1 hour, operated by Pentland Ferries rather than NorthLink but worth knowing
  • Aberdeen to Kirkwall (Orkney): overnight, around 6 hours
  • Aberdeen to Lerwick (Shetland): overnight, around 12 hours. This is a proper sea voyage with cabins, a restaurant, and a bar. An experience in itself

NorthLink's overnight sailings to Shetland particularly are worth doing. You book a cabin, have dinner, sleep, and wake up in Lerwick. It saves a night's accommodation and adds to the adventure considerably.

Vehicle Bookings: Do Not Leave This Too Late

If you are taking a car, van, or campervan, you need to book your vehicle space in advance for summer sailings. This cannot be overstated.

On popular routes like Ullapool to Stornoway, or Oban to Craignure (Mull), vehicle spaces can sell out weeks or even months ahead in July and August. Foot passengers can usually turn up and board, but vehicle spaces are finite.

Book at:

  • CalMac: calmac.co.uk
  • NorthLink: northlinkferries.co.uk

Check whether you qualify for Island Resident fares (you do not unless you live on the island) and whether you can pick up a CalMac Island Rover pass if you are planning multiple island hops.

Weather and Cancellations

Ferry cancellations happen. The Pentland Firth between mainland Scotland and Orkney is one of the roughest stretches of water in the world. The Minch between the mainland and Lewis can be brutal in Atlantic storms.

When planning ferry-dependent legs of your trip:

  • Build in a buffer day if a missed sailing would ruin a flight or onward connection
  • Check the CalMac or NorthLink app or website the morning of travel
  • Smaller CalMac vessels are more vulnerable to cancellations than the big overnight ships
  • Weather windows can be short. A service that cancels in the morning may run in the afternoon

Planning an Island Hop: A Logical Approach

The mistake most people make is underestimating how much time islands take. Once you are on Mull or Islay or Harris, there is more to see than a day allows.

A practical starting framework:

If you have 7 days and want islands, consider one main island with two nights minimum rather than grazing five islands in a week. The experience is richer and the logistics far less stressful.

Popular multi-island combinations:

  • Oban, Mull, and Iona: Easy to combine. Oban to Craignure (Mull) by CalMac, then a day trip from Mull to Iona via local ferry
  • Outer Hebrides loop: Ullapool to Stornoway, drive south through Lewis and Harris, ferry from Tarbert or Lochmaddy through the islands, exit via Lochboisdale to Oban. This takes at least 5 days to do properly
  • Orkney from Inverness: Drive north to Scrabster, ferry to Stromness, explore for 2 to 3 nights, return the same way or fly back via Loganair

Small Ferries Worth Knowing

Beyond CalMac and NorthLink, a network of smaller privately operated and council-run ferries covers the smaller islands.

Worth noting:

  • Corran Ferry across Loch Linnhe near Fort William (saves a long drive around)
  • Glenelg to Skye ferry (seasonal, tiny, old-fashioned, wonderful)
  • Tobermory (Mull) to Ardnamurchan: a passenger-only summer service that opens up the remote Ardnamurchan Peninsula
  • Staffa boat trips: not a scheduled ferry but wildlife and cave trip operators running from Mull and Oban in season

On the Ferry: What to Expect

CalMac ferries range from small open-deck vessels to large ships with cafes, restaurants, seating lounges, and vehicle decks. The crossing to Lewis from Ullapool on the larger vessel feels like a proper ferry crossing, with decent food and comfortable seating.

On the overnight NorthLink sailings to Shetland, book a cabin rather than sitting overnight in a recliner. The difference in arrival quality is significant.