Tons of evidence. Check it your self with a simple phone call.
If the Earth was Flat, Sunrise would be at the same time all over, barring any mountains blocking it.
Lets say you live in San Francisco and at the exact time you see the sun rise, make a phone call to Hawaii and ask your friend there if he/she can see the Sunrise. Because the world is round, they will not see the Sun Rise for several more hours and there are NO Mountains in the way, just ocean.
Proof number Two which you can do your self. Go down to the Sea Shore next to a busy shipping port. Watch the Ships sail away. Notice that the further the ship goes away that the Bottom (hull) of the ship goes under first then the top (masts). If the World was flat this would not happen.
Proof Number Three - Start in San Francisco - Find yourself a Sail Boat and Head West, Keep going due west.
You will never find the EDGE of a flat Earth. You will sail all the way across the Pacific and come to Asia, Steer South West and go around Asia into the Indian Ocean, Continue West till you hit Africa, Turn North and go through the canal into the Mediterranean Sea. Head West out of the M. Sea into the Atlantic Ocean and keep going West. Still no Edge. Across the Atlantic until you hit Florida. Rent a Car and Drive West to San Francisco.