A Green Party spokesman dismissed Mr Seymour's attack as a "gimmick".
"Attacking our MPs' use of air travel is a boring, standard line that the extreme right resort to nearly every year.
"Air travel is a reality for MPs who work hard, especially for those who don't live in Wellington. It's also caucus policy to offset all our air miles."
The figures exclude ministers, who are generally required to travel more often. Mr Seymour spent $7422 on air travel -- only marginally lower than the Green Party average.
His office pointed to higher spending by leaders of parties. Green co-leader James Shaw spent $14,425.
Mr Seymour referenced the Greens' spending on flights during his keynote address to his party's annual conference in Orakei.
A self-described "climate luke-warmer", he argued Act's ideology was the best bet for protecting the environment, and announced policy to sell state-owned farmer Landcorp and put the proceeds in a trust that would give grants to groups running native wildlife sanctuaries.
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