How about BKK-KKC (Khon Kaen) The full Y fare is THB2910 (USD$70 AUD$110) return. You can complete four round trips each on Saturdays and Sundays:
TG040 BKK-KKC 06:45-07:40
TG041 KKC-BKK 08:30-09:25
TG042 BKK-KKC 10:30-11:25
TG043 KKC-BKK 12:05-13:00
TG044 BKK-KKC 14:00-14:55
TG045 KKC-BKK 15:35-16:30
TG046 BKK-KKC 18:45-19:40
TG047 KKC-BKK 20:25-21:20
Even if you did one full day of travel BKK-KKC, plus SYD-MEL-BKK-SYD, that would give you eleven segments.
Presto! *A Gold!
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Latitudes.
For my part, I travel not to go anywhere, but to go. I travel for travel’s sake. The great affair is to move; to feel the needs and hitches of our life more nearly; to come down off this feather-bed of civilisation, and find the globe granite underfoot and strewn with cutting flints.
Robert Louis Stevenson (1850–1894)