If I stay in Gwangalli Beach area, is it far from Busan Train Station if I am coming from Seoul and to the Busan Airport if I am flying out to Jeju?
Not that far, you can take train or buses, off course with taxi as well. Allocate 45mins for travelling between Gwangalli to downtown, and at least 1:!5hrs to the airport.
For me, mainly to explore the city downtown area, I chosen to stay around Seomyeon.
We took the city tour bus to Gwangalli from the Busan train station and it took about 45 minutes.
We stayed in the Haeundae area which is even farther than Gwangalli Beach and the taxi to Busan Station was 14800 won (less than USD 15). We allowed 30 minutes.
We arrived via airplane and landed at Busan Airport. We actually took the light rail rail then the metro. You could probably do something similar. Or taxi to the light rail stop.
Get quick answers from Gwangalli Beach staff and past visitors.