How long is the ferry from Oma to Hakodate?

An hour and a half with Tsugaru Kaikyo Ferry, the only company sailing it.

Oma to Hakodate Ferry: 1h 30m, twice a day

Seats and cabins: Seats · Premium seats · Shared rooms
Facilities: Shop · Wheelchair access
Pets: Kennels · Pet area · Dogs travel only in the ships' dog rooms, booked ahead, in a closed cage of up to 44×61×51 cm and up to 20 kg (30 kg in a private dog room or dog-friendly First room); other pets stay in the car with no access during the crossing, and foot passengers cannot bring pets.
Dogs travel only in the ships' dog rooms, booked ahead, in a closed cage of up to 44×61×51 cm and up to 20 kg (30 kg in a private dog room or dog-friendly First room); other pets stay in the car with no access during the crossing, and foot passengers cannot bring pets.