What this calculator works out
This calculator adds the ferry fare, the fuel cost of driving to the port and expected onboard spending into a single figure.
The drive to the port is the component most often left out, and on a UK crossing it can be several hours and a substantial share of the total.
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Before you compare
- Fare should be the full price for your vehicle and party, including any cabin, pet or extra-height charge.
- Fuel to port applies at both ends of the journey and on the return — count all of it.
- Onboard spending on a long crossing includes meals, which for a family is easily more than the cabin.
- Compare against flying with a hire car at the other end, which changes the arithmetic entirely for some trips.
A ferry carries a car and everything in it for a fare that does not rise with luggage. Flying charges per bag, per person, and needs a hire car at the far end. For a family with a lot of luggage, or with pets, bicycles or camping equipment, the ferry frequently wins on total cost even where the fare looks higher than a flight.
How this calculator works
A sum of three components:
Total = fare + fuel to port + onboard spendingThe calculation is a single crossing. For a return trip, either double the result or enter return figures throughout — mixing the two is an easy error to make.
Worked example: a crossing
Using the default figures — a £180 fare, £45 of fuel to the port, £30 of onboard spending:
- Total: £255
For a return trip that is £510, before any driving at the destination. Compare against four flights at £120 return each — £480 — plus baggage, airport parking and a hire car, and the ferry is comfortably ahead for a family with a car full of luggage. For two people travelling light, the flight usually wins.
Common mistakes
- Comparing the fare against a flight price. Compare the total journey against the total journey.
- Forgetting the drive at both ends. Port to destination can be substantial.
- Omitting the cabin on an overnight crossing. It is usually compulsory and not always included.
- Underestimating onboard food. Captive pricing applies.
- Calculating one way for a return trip.
Frequently asked questions
When is a ferry cheaper than flying?
Generally with a car, a lot of luggage, pets, or a group of three or more. The fare covers the vehicle rather than each person and each bag, so the comparison improves as the party and its luggage grow. For one or two people travelling light, budget flights are usually cheaper and faster.
Do I need a cabin?
On overnight crossings most operators require one, and on long day crossings it is optional. Reclining seats are cheaper and considerably less restful. For an overnight sailing before a long drive, a cabin is worth treating as part of the journey's safety rather than as a comfort — arriving unrested to drive on unfamiliar roads is the risk it addresses.
What about travelling with a pet?
Ferries are generally more accommodating than airlines, and many routes allow pets to stay in the vehicle or in dedicated kennels, with some offering pet-friendly cabins. Documentation requirements for taking pets abroad from the UK changed after 2021 and involve an animal health certificate rather than the previous pet passport. Requirements should be checked well in advance.
How early do I need to arrive?
Typically 60 to 90 minutes before departure for a vehicle, longer at busy times and on routes with border checks. Missing check-in usually forfeits the fare. Border processes at some ports have added time since 2021, and operators publish current advice for their routes.
Is what I enter stored?
No. Figures are processed in your browser and never transmitted or retained.
Related tools
References
- GOV.UK — travelling abroad with a vehicle, pet travel rules and border requirements
- MoneyHelper — comparing travel costs
Sources are checked at publication and can change — how I choose and check references.