The Penzance to St Mary’s ferry route is the primary sea connection between mainland Cornwall and the Isles of Scilly, offering a scenic and reliable alternative to air travel. Departing from Penzance Harbour and arriving at St Mary’s Quay, this route is ideal for travellers seeking a relaxed journey with the option to bring a car, pets, or travel as foot passengers. The ferry crossing time averages 2 hours and 45 minutes, making it a convenient and comfortable way to reach the Isles. The 2025 season continues to offer improved booking options, updated regulations, and enhanced onboard services, making the Penzance to St Mary’s ferry a top choice for island-bound travellers.
| Crossing Time | 2 hours 45 minutes |
|---|---|
| Frequency | Daily (March–October), reduced service in winter |
| Main Operator | Isles of Scilly Travel (Scillonian III) |
| Average Price Range | £55–£75 (adult foot passenger, return) |
Route Overview and Operators
The Penzance to St Mary’s ferry is operated by Isles of Scilly Travel, which runs the Scillonian III passenger ferry. This iconic vessel has served the route for decades and is well-equipped for the 2025 season, offering capacity for over 400 passengers. While the ferry does not carry cars, it accommodates luggage, pets, and bicycles, making it a versatile option for various travel needs.
Sailings typically run from late March to the end of October, with daily departures from Penzance in the morning and return sailings from St Mary’s in the afternoon. In the winter months (November to February), sailings are limited or suspended due to weather conditions, with Skybus flights serving as the alternative.
Compared to flying, the ferry offers a more affordable and scenic experience, especially for those prone to motion sickness or travelling with bulky luggage. It’s also the only option for those wishing to bring pets or bicycles to the islands.
Essential Travel Information for 2025
Booking, Check-in, and Documents
Advance booking is strongly recommended, particularly during school holidays and summer weekends. Tickets can be booked online via the Isles of Scilly Travel website or through authorised travel agents. For 2025, digital tickets are accepted, but printed copies are advised as a backup.
Check-in opens 90 minutes before departure and closes 30 minutes prior. Foot passengers must check in at the Penzance Ferry Terminal, while luggage is dropped off separately at the designated area.
Post-Brexit travel rules apply. UK citizens do not need a passport for domestic travel to the Isles of Scilly, but a valid photo ID (such as a driving licence) is required. International travellers must carry a valid passport. EU ID cards are no longer accepted unless the traveller has settled or pre-settled status in the UK.
Travelling with Vehicles, Pets, and Luggage
Cars are not permitted on the Scillonian III ferry. However, vehicle transportation is possible via the separate freight service operated by Isles of Scilly Steamship Company, subject to strict licensing and island restrictions. Visitors are encouraged to leave their vehicles in long-stay car parks near Penzance Harbour.
Pets are welcome aboard the ferry. Dogs must be booked in advance and travel on a lead or in a carrier. For 2025, the PETS travel scheme does not apply as the Isles of Scilly are part of the UK. No health certificate or passport is required for domestic pet travel, but owners must ensure pets are well-behaved and secure during the crossing.
Luggage allowances include up to 25kg per passenger. Larger items such as bicycles and surfboards incur additional fees and must be pre-booked. All luggage is stowed in a dedicated hold and not accessible during the voyage.
Money-Saving Tips and Onward Travel
To secure the best prices, book tickets at least 8 weeks in advance. Off-peak travel (April, May, and September) offers lower fares and quieter sailings. Group discounts and family tickets are available, and children under 2 travel free.
Onboard amenities include a café serving hot and cold food, indoor and outdoor seating, WiFi access (limited), and toilet facilities. While basic, the amenities are sufficient for the short crossing.
Upon arrival at St Mary’s Quay, visitors can explore Hugh Town on foot or take local transport to other parts of the island. Inter-island boats connect St Mary’s to Tresco, St Martin’s, Bryher, and St Agnes. Taxis, bike hire, and walking routes are all readily available, making onward travel seamless.
Final Thoughts: The Penzance to St Mary’s ferry remains the most scenic and flexible way to reach the Isles of Scilly in 2025. With daily sailings, pet-friendly policies, and straightforward booking, it’s ideal for families, solo travellers, and adventurers alike. Be sure to check the latest sailing timetable and book early to enjoy the best fares and availability.