In addition you'll need to pay for:
- flight to Stromness and from Stornoway;
- onshore activities, excursions, bars;
- transfer from/to the airport (In Stornoway the airport is just 20 minutes from the port. The W5 bus goes every hour from the airport to the sea port. In Glasgow Scotrail goes from our pier to the "Paisley Gilmor Street" where you change to bus 757 which would take you to international airport of Hlasgow).