Bangkok · East
Bang Na and the east
Bang Na sits on the eastern stretch of the BTS Sukhumvit Line, with nearby stations at Udom Suk, Bang Na and stops further out. Several large international school campuses are on this side of the city, including Bangkok Patana School in Bang Na. Families often live along this corridor so the school run stays on one line or a short road trip rather than a cross-city journey.
The Airport Rail Link is a separate line that also serves the east, with stops such as Ban Thap Chang, and it continues to Suvarnabhumi Airport. It does not replace the BTS, and a walk between the two systems is not always short. If you expect to use the airport often, check the actual route from the building to the Airport Rail Link, rather than the walking distance to a BTS station alone.
This side of Bangkok is more spread out than Thonglor. Some condominiums sit beside large roads. Others are closer to older neighbourhood streets. The tradeoff is usually space and a simpler trip to an eastern campus, against a longer ride into Silom or the older river districts. Test the commute at the hour you will travel. An empty station at 11:00 tells you little about 07:15.
For a wider picture of where schools sit, open the schools by area file.