Commercial airplanes with two, three and four engines are safe. In fact, the record shows that twinjets have fewer engine problems than airplanes with more than two engines.
What's more, twinjets are designed to fly on only one engine for extended periods of time, and routes are laid out to keep them within a safe distance of an airport at all times, just in case an engine fails.
What are the chances of both engines failing at the same time? The probability of that happening on a twin jet is less than one in a billion flight hours.
About 96 percent of jetliners delivered today are twinjets. They safely serve every type of route, from short-haul shuttle flights to the longest globe-spanning nonstop flights.