Every motorhomer heading to Spain faces the same decision sooner or later. Do you take the short crossing to Calais or Folkestone and drive south through France, or do you pay more upfront for the direct ferry to Santander or Bilbao and bypass France altogether?

On the face of it, the short crossing looks cheaper. The ferry or tunnel costs a fraction of the direct Spain sailing. But once you add fuel for an extra day or two of driving, French autoroute tolls, and the wear on you and the vehicle, the gap closes faster than you might expect. For longer destinations like the Algarve or Gibraltar, the direct ferry can come out ahead on total cost, and you arrive without having ground out 800 miles of autoroute.

The calculator below lets you put your own numbers in and see exactly where you stand.

How to use it

Pick your destination from the dropdown and the calculator populates immediately with estimated costs for every viable route, sorted cheapest first.

The default figures assume 25 MPG, diesel at £1.59 a litre, and 80 miles from your home to the port. Change any of those to match your own vehicle and location and the results update instantly.

Ferry prices are loaded as guide figures for the season you select. These are reasonable ballpark numbers but ferry prices vary enormously depending on how far ahead you book and exactly which sailing you choose. The "Adjust ferry and tunnel prices" section lets you overwrite any figure with your actual quoted price, which gives you a much more accurate comparison.

What the toll estimate covers

The French toll figures are researched per destination and cover the main autoroute routes from Calais in a class 1 vehicle, meaning a motorhome under 3.5 tonnes gross. If your motorhome is over 3.5 tonnes you fall into class 2 and the toll bill will be noticeably higher. The ViaMichelin link next to the toll estimate will open the route pre-filled so you can check the current figure for your specific vehicle.

A couple of things the calculator does not include. Spanish and Portuguese motorway tolls are a separate cost on top of the French figures, and can add a meaningful amount depending on how far into the peninsula you are going. Portugal in particular has an extensive toll network. And if you are routing through Italy, the Fréjus or Mont Blanc tunnel tolls are included in the French estimate but Italian autoroute tolls beyond the border are not.

The cheapest route is not always the best one

A calculator can tell you which option costs less. It cannot tell you what it is like to sit in a motorhome on a wet French autoroute at half past ten on a November night, with 200 miles still to go and the rain hammering the roof. Sometimes the direct ferry costs more on paper and is still the right answer.

This matters most in winter. The Pyrenees crossings into Spain can be affected by snow from November through to March, and some of the high passes close entirely or require snow chains. Driving south through France to reach Spain in January is a different proposition to doing the same trip in June. The direct ferry to Santander or Bilbao sidesteps all of that. You sail overnight, the mountains are someone else's problem, and you wake up in northern Spain ready to drive south in whatever weather you find.

Even in milder conditions, there is a strong argument for the direct ferry based on experience rather than cost. Driving the length of France is a two-day job for most motorhomes, which means a night parked somewhere in the middle, an early start, and arriving at your destination already tired. The Bay of Biscay crossing is not always smooth, but most people find a night on board a far more relaxed way to cover the distance.

The overnight ferry argument

The direct sailings to Santander and Bilbao are long crossings, and that is largely the point. You go to bed and wake up in Spain. No overnight site fees, no early start, no fatigue from a long driving day through France. That is a genuine benefit that does not show up in the cost comparison, but it is worth factoring in when you are weighing up the options.

Getting the best ferry price

Ferry prices on these routes can vary by hundreds of pounds depending on when you book. The direct Spain sailings in particular are cheapest booked several months in advance, and peak summer prices can be double the off-peak equivalent. If your dates are flexible, shifting by a week either side of the school holidays can make a significant difference.

Brittany Ferries operates all three direct Spain routes as well as Portsmouth to Caen, Cherbourg, and St Malo. P&O and DFDS both run Dover to Calais. Eurotunnel Le Shuttle operates the Folkestone to Coquelles crossing, which at 35 minutes is the fastest option if you are happy to drive south from Calais.

A note on timing

Toll rates change periodically and ferry guide prices are reviewed regularly. The figures in this calculator were last checked in 2026. If you spot anything that looks out of date, let us know in the forum and we will update it.

Whatever route you end up taking, have a good trip.

Got a question about ferry routes or driving to Spain? Head over to the MotorhomeFun forum where our members have covered just about every route, port, and crossing you can think of.