Hongdae runs late, and the station under it — Hongik Univ — is one of the most useful in the city for travelers, because the AREX airport line stops right here. Store a bag at Hongik Univ and you can go from the neighbourhood straight to Incheon without a transfer.
Coin lockers at Hongik Univ Station
Hongik Univ is a big interchange — Line 2, the Gyeongui-Jungang line, and the AREX — so the lockers are spread across several levels rather than one wall. Pricing is the standard ₩2,200 to ₩4,400 for four hours. The Hongdae locker page lists each bank with live availability; on weekend nights the large lockers go first, so check before you commit.
Why Hongdae is handy for the airport
The AREX runs from Hongik Univ straight to Incheon. That makes this a smart last stop: store the suitcase in the morning, spend the day around Hongdae and Yeonnam-dong, then grab the bag and step onto the airport train. No hauling it across town to Seoul Station first.
The staffed desk started here
Hongik Univ is where Seoul's staffed T-Luggage service began, so alongside the coin lockers there's a counter for oversized bags and same-day delivery. If your case won't fit a locker, or you've got several, that's the move — the full guide breaks down when the desk beats a locker.
Late nights and pickups
Lockers run on station hours, roughly first to last train, and Hongdae's nightlife outlasts them. Plan to collect your bag before the last train — or leave it overnight and pay the extra day when you're back. New to the machines? The foreigner's how-to walks through paying with a foreign card.