Travelers on the Goryokaku to Onumakoen route primarily use the Limited Express train service known as the Aoi. This train operates at speeds up to 130 km/h (81 mph) and covers the distance in approximately 1 hour and 20 minutes. The Aoi Limited Express offers both standard and reserved seating options, making it suitable for different preferences. It connects key points, including Hakodate and Onuma Park, providing great views of the surrounding scenery.
On the other hand, the local trains, such as the Hakodate Line services, operate at slower speeds and take about 2 hours, with several stops along the way. While the Aoi Limited Express is the faster choice for reaching Onumakoen, local trains offer a more leisurely journey, giving passengers the chance to experience the regional landscapes in detail. Amenities on the Aoi include comfortable seating and refreshments, ensuring a pleasant ride.