Guiding and shop manager Mary-Ann Rowland said education was a huge part of their conservation work.
Up to 500 pupils and high school students from around Auckland and the Far North will benefit from the airport's grant.
Rowland said the all-day trip was a big highlight for youngsters, as well as their parents. "We had one man who had tears in his eyes during one of our tours - he had never seen anything like it.
Some of the kids have never been to the bush or the ferry or even on a bus. They're so excited.
"They're just going: 'Wow!'. To see a kereru flying right above their heads is incredible for them. They can't believe their eyes."
Auckland Airport spokeswoman Anna Cassels-Brown said visiting the sanctuary was one of the great things about growing up in New Zealand. "We're delighted this gift will help students experience everything Tiritiri Matangi has to offer."
For more info visit: www.tiritirimatangi.org.nz
Auckland Airport is giving away $120,000 to Kiwi charities as part of its 12 Days of Christmas initiative. The Herald on Sunday and Herald will profile each recipient.</strong>