A beautiful flight simulator that's not so demanding on your computer.

User Rating: 9 | Microsoft Flight Simulator 9 PC
This flight simulator is no doubt one of the best ones out in the market. I think that this would be the best for those who don't have a computer that meets Flight Simulator X's requirements.
Flight Simulator 2004 offers a great selection of planes. You can fly commercial planes such as Boeing 747s, 777s, 737, etc. or older planes such as the Wright Brother's plane. You can also download third party aircraft for free on websites such as simviation.com.
Creating a Flight is a fun, yet simple way of releasing boredom. You can fly to many different places. I tried flying from San Francisco to Shanghai and it took about 30 minutes, but you will have to raise the Simulation Speed otherwise it would take as long as it would take to fly there which would be thirteen hours.
There are also a great selection of airports. There are lots of them in the United States as well as ones outside of the country.
Flight Simulator 2004 is a very realistic flight simulator and anybody with a computer that can't run Flight Simulator X should get a copy.