1. Are you staying only in Seoul?
2. How often will you ride transit each day?
3. Will you hit a lot of paid attractions?
Suggested starting point
Discover Seoul Pass
Seoul attraction-heavy trips
Reference price
₩70,000 (48h) / ₩90,000 (72h) / ₩130,000 (120h)
Timed sightseeing pass built around partner attraction entry rather than unlimited everyday transit.
Works best when you have a dense Seoul sightseeing schedule and can stack multiple paid sights in a short window.
Compare the included attraction list before buying because value depends on your exact itinerary.