For people in good shape it would probably be reasonable to walk 20 miles a day (with supplies). With about 2,921 miles* from DC to San Francisco, that's about 146 days of walking. Now, if you were to do that, taking a day off a week, that's about 24 weeks and 2 days.
So roughly 6 months.
* milage is driving, so walking would be a bit longer. Ask.com's walking direction function doesn't work for that distance.
Around 14000
from october 15, 1973- April 11 1975:)
That's impossible.
around a 7 - 11 days
it depends where you fly from but the flight would usually be around 10 hours give or take
A year
A year
It takes approximately two weeks to travel from England to America by ship.
10 weeks
You will have to swim the Atlantic Ocean first!
about 6 weeks
Quite long...
How long did it take for sir Walter Raleigh to sail across the world
2.990 km (achill island, Ireland - point south of maberly, Canada)