Other mistake: When the plane takes off in Alex's vision, the plane begins to go into a nosedive, and the entire left fuselage is blown apart, sucking many people out of the plane. The plane then explodes completely, but in reality, the plane just takes off, and explodes almost instantly afterwards. No struggling with the plane is shown in reality, nor is the plane going into a nosedive. This is also proven in FD5, which is a prequel. The jet engine explodes, leaving a flaming tail, and the plane spinning out of control. The plane just simply "explodes" without any signs of struggle.
Suggested correction: According to the news report, "Officials believe deterioration of silicon insulation on an electrical connector to the scavenger pump may have leaked combustible fluids. A spark in the fuel switch in the fuselage may have ignited the fuel line and proceeded to the fuel pump which would have set off the catastrophic explosion." This spark, in the premonition, happened while they were already in the air, which is why the damage occured how it did. However, in reality, Alex has his panic, and they're escorted off. So instead of already being up on the air, the spark happens as soon as the plane takes off instead. Further, when you compare the timeline of the explosion in the premonition and the explosion in real life, roughly the same amount of time has passed, placing the explosion at the same moment it should have been to start with.
Suggested correction: Death will find any way to make sure that someone dies when they're supposed to, so regardless of how it happens, how natural is it when an invisible force is causing the explosion? Plus, just because Alex had a vision of it does not mean that the real-life occurrence will happen in the same way. It doesn't really matter how the plane exploded; all that matters is that it did.
Corrected entry: In 'Final Destination 2', the characters stop the cycle of death by bringing new life into the equation - one of them drowns and is revived by CPR. Why does Alex being electrocuted and revived by CPR (still a new life being brought into existence) not have the same effect?
Correction: The new life in FD2 was closing the rift. It's the same reason that Death worked backward in #2, to close the rift. In FD1 there is no rift as it's only been one way and thusly it cannot be closed.
Correction: That "new life" is the woman, Isabella, giving birth. Being revived or saved isn't a new life.
Continuity mistake: Alex buckles his seatbelt when he first sits down on the plane, before the girls ask him to move, making him have to unbuckle to move for them. When he wakes up after his premonition, he immediately jumps out of the seat, not buckled in.
Suggested correction: Since we don't know exactly when he started dreaming the premonition, it's easy to assume putting on the seat belt was part of the dream.