We may have to just agree to disagree, because I think your perjury point is, at best, a bad guess, and at worst, disingenuous because we are not a jury with this fact pattern and thus cannot come to a conclusion either way.
I'll add I think it is a bad guess because, all things being equal, if under oath you said you weren't on a plane, and the flight's manifest comes to evidence with your name on it in one or more flights... if I was a juror, that is enough evidence for me (without counter evidence as I implied with "all things being equal". There are ways to argue against it, like dementia/Alzheimer's for intent or someone with the same name for the underlying fact, but that is adding information to the situation). This is particularly subjective, but I have a hard time putting myself in the shoes of someone who reasonably doubts the accuracy of a passenger manifests. I am a lay person when it comes to manifests, so perhaps they are casually-written documents that aren't taken seriously. I view them as quite the opposite (mistakes are possible, but evidence of the contrary would be needed).