There are two ways of moving from Aranyaplathet to the eastern part of Bangkok (Onnut, Suvarnabhumi International Airport, and Sukhumvit areas).

If you are planning to stay at Sukhumvit On-nut Guesthouse, and coming from Aranyaplathet border, please take either of the following routes:

1. Aranyaplathet (Border Market) --> Suvarnabhumi International Airport's Bus Terminal
   Departure 12:30 --> 16:00 Arrival
   Departure 14:30 --> 18:00 Arrival
2. Suvarnabhumi International Airport's Bus Terminal --> On Nut, Ekkamai, Sukhumvit Road.
   Take Public Bus No.552 (34 Bahts) or Airport Express AE3 (150 Bahts)

The other way is a route via Sa Kaew:

1. Aranyaplathet (Bus Station in town) --> Sa Kaew Bus Station (by taking a bus for Bangkok's Northern Bus Station)
   Departing every 30 minutes during the daytime.
2. Sa Kaew Bus Station --> Bangkok's Eastern Bus Station (Ekkamai)
   3 buses daily: departing at 11:00, 13:00, and 17:30
3. This bus stops at BTS On-nut Station on the way. So you can change to BTS there.