It's not hypocritical. Much of climate activism requires travel to implement and communicate.
By far the worst thing to do is nothing.
It's just another gem from the same tired old red herring yuck fest to distract from the real issue of climate change and its impact. Al Gore has put forth rather substantial effort to reduce his personal carbon footprint and to offset the carbon use of himself, family, and staff. But even if he didn't, the inconvenient truth is... it doesn't matter. It's the total carbon going into the atmosphere that matters, not the footprint of any individual — including Al Gore. The New Republic published a worthwhile article on the topic.
https://newrepublic.com/article/al-gores-carbon-footprint-doesnt-matterAl Gore’s Carbon Footprint Doesn’t MatterConservatives say environmentalists are hypocrites if they consume more energy than the average American. It's a deceitful, disingenuous argument.The New Republic - Emily Atkin - August 7, 2017 - A few brief excerpts below...
...let’s set aside the dispute over Gore’s carbon footprint, because the report raises a much bigger question: Should prominent climate advocates be expected to live a carbon-neutral lifestyle? Are they hypocrites if they don’t? Right-wing critics would have you believe so—that these moralizing elitists are making rules for the public that they themselves don’t have to follow. This has a powerful appeal, especially today. But ultimately the argument is deceitful faux-populism, and the real hypocrites here are the purveyors of it...
...The claim that Gore and his ilk are hypocrites is a classic conservative attack strategy of redirection (because it ignores the core issue of climate change) and of poisoning the well (because it attempts to discredit the message by discrediting the messenger). This is much easier, and perhaps more rhetorically effective, than debunking climate science itself. That’s why you only see groups like the National Center for Public Policy Research releasing “studies” on Gore’s energy use. NCPPR, which has been funded by oil interests, advocates against policies to fight global warming because it denies that global warming exists. “The world isn’t warming,” the group falsely claimed in a 2014 paper arguing against climate regulations. Thus, it’s in their interest to try to undermine one of the most effective advocates of aggressive climate action.
But the hypocrisy charge simply doesn’t hold up to scrutiny. An anti-abortion advocate who believes abortion is immoral and should be illegal, but gets one herself, is a hypocrite. But climate change advocates who don’t live a carbon-neutral lifestyle aren’t hypocrites because, for the most part, they’re not asking you to live a carbon-neutral lifestyle. They’re asking governments, utilities, energy companies, and large corporations to increase their use of renewable energy so that you can continue to live your life as you please, without contributing to global warming...