The safest way of traveling would be by plane. Despite common fears, flying is statistically the safest mode of transportation. Planes are highly regulated, regularly inspected, and have strict safety protocols in place to prevent accidents. Additionally, the training and certification requirements for pilots are extensive.

On the other hand, traveling by bicycle is also relatively safe, but it is more dependent on environmental factors such as road conditions and the behavior of other road users. Accidents involving bicycles are more common than plane crashes, but they are usually less severe.

Traveling by car is generally safe, but it is also more prone to accidents due to factors like speeding, distracted driving, and impaired driving. While cars are essential for many people's daily lives, the risk of accidents is higher compared to flying.

Traveling by ship is considered relatively safe, but incidents like shipwrecks and collisions can occur, especially in adverse weather conditions. However, the development of advanced navigation technology and safety measures have significantly reduced the likelihood of accidents at sea.

Traveling by train is also generally safe, with strict safety regulations and protocols in place. However, incidents like derailments or collisions can still occur, although they are relatively rare compared to other modes of transportation.

Overall, while each mode of transportation has its own risks and safety considerations, flying by plane is statistically the safest way to travel.