I assume Suwon can be characterized as being a suburb of Seoul. It can be about 40~60 minutes from Seoul and you'll very easily access it by using subway, bus, taxi, or train. I went there because I read it was a well known cafe. I ate fried dumplings, however https://bobbyh320kwh1.blogunteer.com/30693243/the-2-minute-rule-for-suwon-galbi