The Chinese source identifies KBS Arena at 376 Gonghang-daero, Gangseo-gu, and lists access from Balsan Station on Line 5 and Gayang Station on Line 9. That is enough to show why a concert night here needs its own return-plan check: it is not the same accommodation problem as Hongdae, Yeouido or Dongdaemun.
First confirm you are going to KBS Arena, not KBS Hall
The names are similar, but the venues are in different parts of Seoul. Before booking, match the English or Korean venue name and address on your ticket or organizer notice. A hotel chosen for the wrong KBS venue is not a small routing mistake.
The source article specifically cites YESUNG's announced Seoul dates on October 17 and 18, 2026 at KBS Arena. Ticketing, entry times and any tour updates remain subject to the organizer's current notice, so accommodation planning should follow the event details you actually hold.
One concert night usually does not justify moving hotels
If your existing Seoul base still works for the rest of the trip and the post-show return is acceptable, keeping one hotel is usually cleaner than adding checkout, luggage storage and another check-in. For a single show, fix the concert-night transport first instead of assuming the closest possible hotel is the right answer.
Two consecutive show nights make the western side more useful
If you attend both nights, the same side of Seoul is used twice. That makes a western base worth reconsidering, especially if dinner, the post-show return and the following morning also stay west. It still does not mean you need to sleep at the venue gate. The hotel should improve more than the two late-night returns.
Airport days can reinforce—or weaken—the case for moving west
The source notes airport-bus routes near the arena, but that does not mean every nearby hotel automatically gives you an easy airport trip. Your terminal, luggage, late-arrival time and hotel-to-stop final leg still matter. If Hongdae and AREX already serve your arrival or departure well, one concert night may not be enough reason to undo that structure.
Use Incheon Airport to Hongdae and AREX prebook vs airport purchase for those separate decisions.
If only one person attends, decide the meeting point before the hotel
When friends split up, the harder decision is often where to meet after the show. Decide whether everyone meets at the arena, in a dinner area or back at the hotel. A Hongdae base can be useful if both the concertgoer and the non-concertgoer naturally finish there; a venue-near room may be less useful if everyone still heads elsewhere afterward.
Do not combine a hotel-change day with the concert day
Ticket pickup, merchandise, soundcheck or security can move your required arrival time earlier. If you also need to check out, store luggage and enter a new hotel, the concert day becomes unnecessarily fragile. Move the day before or after whenever possible.
Keep flexibility while event details are still moving
If ticketing or entry details are not final, a cancellable hotel can be more useful than locking the nearest non-refundable room. See Seoul hotel cancellation and payment rules before committing.
Final decision rule
Keep your original hotel if the event is one night and the next morning still belongs to your existing base. Consider moving west when the concert location is reused across multiple nights, the post-show dinner and sleep both stay west, and the next morning also benefits. The second address should perform more than one job.