In order of proximity:

1. MIL - she lives a bit over an hour away by car on the opposite side of the metro area that I live in.
2. Sibling 1, their spouse, & younger child - live 4.5-5 hours away by car, depending on traffic & pit stops. Different metro area in my same state (state 1).
3. Nibling 1 (sibling 1’s elder child) & their spouse - live about 17 hours away by car in a sizable metro area in state 2
4. Sibling 2, their spouse, & only child - live about 31 hours away by car in a rural-ish community in state 3.

Nibling 1 & sibling 2 could be reached much more quickly by flying. Direct flights to nibling 1’s city exist, but traveling to sibling 2’s city would require at least 1 layover+connecting flight and either 1 hour or 3 hours driving in a rental car, depending on which nearby airport we flew into.

Deceased kin & how far away they lived at time of death:

1. FIL - cohabitated with MIL about an hour away
2. dad - 3 hours away by car
3. mom - 4.5 hours away by car (after dad died she moved to the same metro area as sibling 1, but half an hour drive from sibling 1, where she continued to live until she also croaked)