Great circle mapper calculate the miles as 28870
You need to remove a few airports

A LONE4 may be a better option
Origin: HEL (fi) xONEx Fare Estimate
1: HEL-CDG: 1st of 4 (Europe)
2: CDG-DFW: 1st of 1 (intercontinental entry to North America without immediate transit & departure)
3: DFW-LAS: 1st of 6 (North America)
4: LAS-SFO: surface
5: SFO-HNL: 2nd of 6 (North America)
6: HNL-SYD: intercontinental
7: SYD-AKL: 1st of 4 (Southwest Pacific)
8: AKL-HKG: 1st of 1 (intercontinental entry to Asia without immediate transit & departure)
9: HKG-PVG: 1st of 4 (Asia)
10: PVG-NRT: 2nd of 4 (Asia)
11: NRT-HEL: intercontinental