Space travel: journey times

I've converted astronomical distances into hypothetical travel times, reckoning that a car goes at about 100 kph, and the Apollo missions took four days to reach the moon, which works out to about 4,000 kph. The speed of light (1,079,252,849 kph) is a very long way beyond anything we can achieve today.

Journey By car By Apollo Light speed
Leave Earth's atmosphere 11 hours 17 minutes -
Earth to Moon 5 months 4 days 1 second
Earth to Mars (at nearest) 63 years 2 years 3 minutes
Earth to Sun 171 years 4 years 8 minutes
Earth to Neptune (at nearest) 4,920 years 123 years 4 hours
Earth to nearest star (Proxima Centauri) 46,000,000 years 1,000,000 years 4 years
Earth to centre of galaxy 300,000,000,000 years 8,000,000,000 years 30,000 years
Earth to Andromeda galaxy don't even think about it 2,000,000 years