ΔE 11.5, fair: the same colour family, but not a straight swap. Sunset Orange is a little darker, cooler than Flickering Flame.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Sunset Orange is a little darker, cooler than Flickering Flame.
The same difference applies the other way round: Flickering Flame is a little lighter, warmer.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Flickering Flame on the colour wheel See Sunset Orange on the colour wheel
All matches: Flickering Flame equivalents · Sunset Orange equivalents