Ferry eSIMs: what actually works on a crossing
Short answer
Ask how long you are actually out of reach. Under 2 hours and the answer is usually nothing at all: a daytime hop keeps you in range of the shore for most of the way, and your normal phone plan carries you across.
An overnight sailing is a different trip. You are out of range for hours, usually while you are awake and wanting something to do, and your choice narrows to a ferry plan from $7.99 or whatever the on-board Wi-Fi is selling that night. Pick the route below and it will tell you which of the two you are on.
Prices last confirmed
Ferry plans
GigSky — European Ferries 5GB🔵 FerryOur #1 pickBest valueCode ESIMDUDE⚠️ Covers the ferry’s onboard network during the crossing.
Get deal →$39.99≈ $39.99/day- GigSky — Europe Ferries + Land 5GB🔵 FerryOur #1 pickCode ESIMDUDE
⚠️ Covers the ferry crossing and land networks in the countries at either end.
Get deal →$40.99≈ $5.86/day - GigSky — European Ferries 3GB🔵 FerryOur #1 pickCode ESIMDUDE
⚠️ Covers the ferry’s onboard network during the crossing.
Get deal →$24.99≈ $24.99/day - GigSky — Europe Ferries + Land 3GB🔵 FerryOur #1 pickCode ESIMDUDE
⚠️ Covers the ferry crossing and land networks in the countries at either end.
Get deal →$25.99≈ $3.71/day - GigSky — European Ferries 1GB🔵 FerryOur #1 pickCode ESIMDUDE
⚠️ Covers the ferry’s onboard network during the crossing.
Get deal →$10.99≈ $10.99/day - GigSky — Europe Ferries + Land 1GB🔵 FerryOur #1 pickCode ESIMDUDE
⚠️ Covers the ferry crossing and land networks in the countries at either end.
Get deal →$11.99≈ $1.71/day - GigSky — European Ferries 512MB🔵 FerryOur #1 pickCode ESIMDUDE
⚠️ Covers the ferry’s onboard network during the crossing.
Get deal →$7.99≈ $7.99/day - GigSky — Europe Ferries + Land 512MB🔵 FerryOur #1 pickCode ESIMDUDE
⚠️ Covers the ferry crossing and land networks in the countries at either end.
Get deal →$8.99≈ $1.28/day
Operators covered by a ferry eSIM
Portsmouth–St Malo, Portsmouth–Caen, Plymouth–Roscoff, Poole–Cherbourg, Portsmouth–Bilbao, Portsmouth–Santander
Oslo–Kiel, Larvik–Hirtshals, Kristiansand–Hirtshals, Sandefjord–Strömstad
Dover–Calais, Dover–Dunkirk, Newcastle–Amsterdam, Copenhagen–Oslo, Klaipėda–Kiel, plus Baltic and Mediterranean routes
Holyhead–Dublin, Fishguard–Rosslare, Cairnryan–Belfast, Harwich–Hook of Holland, Gothenburg–Kiel, Gothenburg–Frederikshavn
Operators with no ferry eSIM
No provider sells a branded plan for these. That does not mean you are stuck — on shorter routes a regional land eSIM covers most of the crossing, and each page explains where the gaps fall. Worth knowing too: Red Bull MOBILE, Telenor Maritime’s consumer partner, names Stena Line, DFDS, Brittany Ferries, Color Line, Irish Ferries and Finnlines vessels on its own list — a second route onto the northern ferry fleets that is not GigSky.
Piraeus–Santorini, Piraeus–Mykonos, Piraeus–Naxos–Paros, Piraeus–Crete, Rhodes and Dodecanese routes
Wellington–Picton across the Cook Strait
Dublin–Holyhead, Rosslare–Pembroke, Dublin–Cherbourg, Dover–Calais
Dover–Calais, Hull–Rotterdam, Cairnryan–Larne, Liverpool–Dublin
Route-by-route guides
Whether you need a plan depends almost entirely on one number: how many hours the crossing spends beyond the reach of a land mast. Dover–Calais is about zero. Portsmouth–Bilbao is most of a day.
| Route | Operator | Crossing | Ferry eSIM? |
|---|---|---|---|
| Portsmouth to Bilbao | Brittany Ferries | 24h | Yes — GigSky |
| Oslo to Kiel | Color Line | 20h | Yes — GigSky |
| Copenhagen to Oslo | DFDS | 17h | Yes — GigSky |
| Newcastle to Amsterdam | DFDS | 16h | Yes — GigSky |
| Gothenburg to Kiel | Stena Line | 14.5h | Yes — GigSky |
| Holyhead to Dublin | Stena Line | 3.5h | Yes — GigSky |
| Dover to Calais | DFDS | 1.5h | Yes — GigSky |
| Dublin to Cherbourg | Irish Ferries | 18h | No |
| Piraeus to Santorini | Blue Star Ferries | 5h | No |
| Wellington to Picton (Cook Strait) | Interislander | 3.5h | No |
Maritime roaming on ferries: why they are a harder problem than cruises
Cruise ships are floating hotels with a commercial incentive to sell you connectivity, so they carry proper maritime cellular networks and satellite backhaul sized for thousands of passengers. Ferries are transport. Many carry Wi-Fi as a courtesy rather than a product, sized for a fraction of the load, and on a packed summer sailing it shows.
The routes where this bites are the long ones: Portsmouth–Bilbao and Portsmouth–Santander cross the Bay of Biscay over roughly 24 hours; Oslo–Kiel is 20 hours across the Skagerrak; Newcastle–Amsterdam and Gothenburg–Kiel run overnight through open North Sea and Baltic water. Those are the crossings worth buying a plan for.
Frequently asked questions
01Do ferries have Wi-Fi?+
Most major operators do — Stena Line, DFDS, Brittany Ferries, P&O Ferries, Irish Ferries and Color Line all offer onboard Wi-Fi — but it is satellite-backed, shared by everyone aboard, and often free only for messaging. On a Dover–Calais hop you will not need it; on an overnight Baltic or Bay of Biscay crossing it is usually slow at peak times, which is where a ferry eSIM earns its keep.
02What are maritime roaming charges on a ferry?+
Once a ferry is beyond roughly 12 nautical miles your phone may attach to the vessel’s own maritime network, and that is billed by your carrier as maritime roaming at rates far above EU or UK roaming — several pounds per megabyte on some tariffs. Airplane mode with Wi-Fi on avoids it entirely; a ferry eSIM connects to the same network at a flat, pre-paid price.
03Is there an eSIM that works on a ferry?+
Yes — GigSky sells the only ferry-branded eSIMs in the market, covering Brittany Ferries, Color Line, DFDS and Stena Line from $7.99. They connect to the vessel’s onboard network during the crossing. No other provider sells a ferry product at all.
04Do I need one for a short ferry crossing?+
Usually not. On short hops like Dover–Calais you stay within land coverage for most of the crossing, so an ordinary UK or French eSIM will hold a signal. The plans earn their money on overnight routes — Copenhagen–Oslo, Newcastle–Amsterdam, Gothenburg–Kiel, Portsmouth–Bilbao — where you spend hours genuinely offshore.
05Is ferry Wi-Fi any good?+
Variable, and it is the weak point of most operators. Onboard Wi-Fi is satellite-backed and shared by everyone aboard, so it congests badly on busy sailings and the free tiers are usually limited to messaging. On long Bay of Biscay and Baltic crossings it is often close to unusable at peak times.
06What about Greek island ferries?+
Greek island hops mostly stay within coastal coverage, so a Greek or European regional eSIM works for most of the journey. No ferry-branded eSIM covers Blue Star or the other Greek operators. The exception is the long overnight run to Crete and the Dodecanese, where you will lose signal for stretches.
07Does a cruise eSIM work on a ferry?+
Not reliably. Cruise plans are sold against cruise-ship maritime networks, and a ferry runs different infrastructure. Buy the ferry-branded SKU for the operator you are sailing with rather than assuming a cruise plan carries over.