All trains operated by Korail, the national railway of South Korea, are included. KTX, Saemaeul and Mugunghwa trains can be used in 2nd class travel (also known as general or standard seating).
Non-KTX trains are called the Saemaeul, Mugunghwa and Tonggeun corresponding roughly to express, semi-express and local services.
Saemaeul trains are a little pricier than buses, while Mugunghwa are about 30% cheaper. However Saemaeul trains are extremely comfortable, having seats that are comparable to business class seats on airplanes. Unfortunately since the introduction of the KTX, there are much fewer Saemaeul and Mugunghwa services.
Tonggeun, formerly Tonggil, are the cheapest, but long-distance, non-aircon services have been phased out and they're now limited to short stopping commuter services. Most long-distance trains have an entertainment car with a small cafe/bar, computers with internet access and a few trains even have private compartments with coin-operated karaoke machines! KR Pass holders can also access the Cinema coach on KTX trains, at a discounted rate of 7,000 Korean Won.
KR Pass holders can also access the Cinema coach on KTX trains, at a discounted rate of 7,000 Korean Won.
The KR Pass is not valid for travel in 1st class and overnight sleepers. However, if a passenger wishes to travel in 1st class he/she is allowed to do so paying only 50% of the cost. At present, the 1st class upgrade can only be made in Korea.
The KR Pass does not include travel on subway/underground services and tourist trains.
Seat reservations in 2nd class, are usually available free of charge but are not available to KR Pass holders if travelling during South Korea main holiday periods, i.e., Lunar New Year's Day, Thanksgiving Day, summer holiday, etc. However, customers can still board the trains with the KR Pass, even without a specific reserved seat.