Three days in Busan: a day by the sea, a day in the old center
To see both the beaches and the old town in Busan, split your days around your lodging. Day two covers Haeundae and Gwangalli, the last day covers Gamcheon and Nampo.
Three days in Busan: a day by the sea, a day in the old center
If you want both Busan's beaches and its older streets, give each its own day. Arrival and check-in will take a bite out of the first. Spend the second day moving from Haeundae and Dongbaekseom to Gwangalli, then use the last for Gamcheon and the Nampo area. Your hotel determines which day carries the longer cross-city journey.
Choose your base, then find the long day
Stay in Haeundae and the beach day is easy, but the trip back from Gamcheon and the old center to Busan Station or the airport may be long. Nampo reverses that trade-off: the final day's sights are close, while the beaches sit across town. Seomyeon works as a transfer base for either direction. Gwangalli makes it easy to return to your room after an evening by the water. Before booking, check the walk from the actual hotel entrance to the station, especially if you'll be pulling a suitcase.[1] The neighborhood-by-neighborhood lodging comparison can help narrow the choice.
Decide what to do with your bags after checkout, too. Will you return to the hotel for them, or leave them nearer your departure point? Busan Transportation Corporation lists the *number of installed lockers* at each station, not whether one will be free when you arrive. Ask your hotel whether it can hold luggage and when you can collect it.[3]
Day one: stay close to your hotel
If you arrive at Busan Station, check which subway line serves your hotel. From Gimhae Airport, work out where to change from the light rail to the city subway. The airport's transport guide identifies the airport light-rail station; the subway map helps with the onward transfer. Leave room for baggage collection and check-in rather than committing to a distant dinner on arrival night.[1][2] For the connections in more detail, see getting into the city from Gimhae Airport or Busan Station.
Once your bags are down, a short beach walk makes sense if you're staying in Haeundae or Gwangalli. In Seomyeon, dinner near the hotel is enough; in Nampo, you might take a brief stroll around Gwangbok-ro. There's little reason to cross town for a beach round trip tonight if you'll be there tomorrow.

*Haeundae Beach and its skyline. A short first-night walk if you're staying nearby; otherwise, save it for day two.*
Day two: start in Haeundae, finish in Gwangalli
Begin at Haeundae Beach and continue toward Dongbaekseom. Visit Busan describes a connection from the end of the beach to the Dongbaek coastal walking path.[4] You don't have to complete the circuit. If stairs or changes in elevation are difficult, walk only as far as a comfortable viewpoint and spend more time by the sea. For a closer look at the order of the beach stops, see the Haeundae-to-Gwangalli day route.

*Dongbaekseom's rocky shore and shaded path. Check the pictured steps and walking conditions against the original image before relying on it.*
Have lunch on the Haeundae side before making the next transfer; it keeps the afternoon less hurried. Choose milmyeon or dwaeji-gukbap if either appeals, and consult the Busan food guide if the dishes are unfamiliar. With energy to spare, linger nearby. Otherwise take Subway Line 2 toward Gwangalli. Gwangalli Beach still requires a walk from Gwangan Station, so don't set a rigid meeting time for the exact moment of sunset.[1]

*Gwangan Bridge after dark, seen from Gwangalli Beach: a place to stop rather than another sight to rush through.*
If seafood is dinner, ask before ordering whether the price is per plate or by weight, and whether table-setting or cooking charges are separate. In strong wind or rain, or when the deck is wet, skip the Dongbaekseom walk, rest somewhere indoors around Haeundae, and reassess the weather before heading to Gwangalli. You needn't fit both a long dinner and a long night-view stop into the evening. The rainy-day Busan guide offers other ways to trim the plan.
Day three: down from Gamcheon into the old center
Sort out luggage before you set off. If your train leaves from Busan Station, compare the detour to retrieve bags from the hotel with leaving them nearer the station. If you're flying, include any return to the hotel in your remaining travel time. Lockers can be full; ask about hotel storage the day before.[3]
Visit Busan describes reaching Gamcheon Culture Village by changing to a village bus at Toseong Station and approaching from the Gamjeong Elementary School side.[5] Check the route and stop again on the day you go. These are lived-in streets on a slope, with steps: don't plan to drag a large suitcase through every alley. If anyone in your group uses a stroller or wheelchair, or finds walking difficult, check which sections are accessible in advance. If that isn't workable, leave Gamcheon out and spend the time on the comparatively flatter old-center route. Keep noise down and avoid photographing residents without permission.[5]

*The hillside houses of Gamcheon Culture Village. The slope is part of the route decision, not just the view.*
After lunch, walk from Jagalchi toward BIFF Square and Gukje Market; add Yongdusan Park only if time allows. Visit Busan groups these markets and streets as a nearby old-center area.[6] Prefer shopping? Drop the park. If rain or tired legs make the day too much, skip Gamcheon first. For snacks such as ssiat hotteok, which may contain nuts, anyone with an allergy should ask about ingredients and cross-contact during preparation rather than relying on the name of the dish. The Gamcheon-to-Nampo day route gives this section more space.
Realistic departure buffers
For a train from Busan Station, allow for the trip from the market, collecting stored luggage, and finding your platform. For a flight from Gimhae, include transfers and walking as well as bag drop and security. As rough planning estimates only, not carrier rules, you could use 60 minutes before departure at Busan Station (90 minutes on a first visit, busy weekend or with large luggage), and 2.5–3 hours before an international flight or 1.5–2 hours before a domestic flight at Gimhae. These figures are never a substitute for your airline's or the railway's actual check-in deadline, and the airport's or station's same-day information always takes precedence.[7]
Shorten or skip Gamcheon if the clock is tight; cut market browsing or Yongdusan next. Getting to your booked train or flight matters more than squeezing in one last stop. If you need help with transfers along the way, keep the Busan public-transport beginner's guide handy.
Official sources — recheck before your trip
These links are starting points, not a fresh verification of all seven full pages. The review relied on official-site search results and page excerpts; the Dongbaek path in [4] was checked only in a search excerpt. Before travelling, revisit the original pages and confirm current subway and village-bus routes and stops, station lockers, airport and airline check-in rules, walking access, and the images' contents and usage rights. Conditions on the ground may change.
[1] Busan Transportation Corporation, Cyber Station map. Basis for station connections and transfers; confirm actual service and exits for your travel date.
[2] Korea Airports Corporation, Gimhae Airport public transport. Airport light rail and transfers via Sasang or Daejeo.
[3] Busan Transportation Corporation, station lockers. Installation information, not live availability.
[4] Visit Busan, Dongbaek coastal walking path. Beach-to-path connection; search excerpt only, full page needs checking.
[5] Visit Busan, Gamcheon Culture Village. Village-bus approach from Toseong Station and etiquette in a residential area.
[6] Visit Busan, old-center attractions. Jagalchi, BIFF Square, Gukje Market, and Yongdusan Park area.
[7] Korea Airports Corporation, Gimhae Airport flight schedules. Flight information can change; check with the airline as well.