The conditional statement in the stretch “if you fly to California, you gain three hours on a five-hour flight” is:
Third conditional. This is used to refer to hypothetical, counterfactual situations in the past.
Zero conditional. It expresses the idea that the fact described is true.
First conditional. It refers to predictive conditional sentences.
Second conditional. The condition expressed is known to be false or is presented as unlikely.
Mixed conditional. It refers to a mixture of the second and third conditionals.