Here are two links to official English bus schedules in South Korea:
T-money is the major bus system for intercity destinations. Bus-tago is typically for places omitted by T-Money.
Note that T-Money and Bustago won’t list all routes and/or timetables. And unless you know how to navigate Naver/Daum, you may have to ask in person for rural departures.
I’ve gathered some bus schedules from several rural towns in the Chungbuk area, and if you so happen to live in one of them, this may help you out.
There are both direct buses (“shiwei”) and local buses (“shinae”).
All taken: February 18, 2017
All taken: June 5, 2017
Taken: June 22, 2017
All taken: October 8, 2016
Taken: November 19, 2016
Taken: January 14, 2017
Taken: January 15, 2017
Taken: February 26, 2017
All taken: February 25, 2017
Taken: August 30, 2016
Taken: March 20, 2017
Menu: Peach juice, deep fried potato ball skewers with cheese powder, fresh kimchi with parsley, dumplings, ddeokguk with eggs and minced pork
Menu: kimchi greens, steamed egg with a corn base and green onions on top, melon, rice with purple grains, shredded seaweed with sesame, gamja tang with sweet potato noodles
Menu: Lukewarm tofu with sesame oil, chili and a hint of soy sauce, kimchi, ketchup shrimps with onions and carrots, plums, rice with yellow grains, radish tofu, and mushroom soup
Menu: Peach juice, sweet garlic roll (Why Korea? Just WHY?), cucumber and cabbage kimchi, minced pork curry and rice, radish soup
Menu: Mayo, salad with pineapple dressing, cherry tomatoes, fluffy dessert rice cake with black sesame, rice with deep fried chicken nuggets, egg, stir-fried kimchi, and seaweed strips, and with miso soup
Menu: Radish cubed kimchi, baguette-so-hard-you-could-poke-someone’s-eye-out-with-it, fresh kimchi, banana, yogurt drink, kalguksu with minced beef, veggies, and shredded egg