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Rose Powell, 9, told ITV News that she and her wingwalking partner Flame Brewer were "mostly screaming and waving" during their record-breaking stunt.
"And we did a little Superwoman pose," she added.
The youngster emphasised that the most important part of their challenge was raising awareness for a muscular dystrophy charity.
"The charity supporting it is called Duchenne Children's Trust and their aim is to end Duchenne in 10 years as it's fatal."
Two nine-year-old girls from west London have become the youngest ever wing walkers. Rose Powell, who's from Fulham and Notting Hill's Flame Brewer have landed safely after taking to the skies over Gloucestershire.
The two girls are the third generation of their families to wingwalk on their grandfather Vic Norman's vintage biplanes.
The pair are raising money for Eli Crossley, who suffers from Duchenne Muscular Dystrophy.
Flame says: "My cousin and I came up with the idea to be the youngestformation wingwalking team and wanted to help Eli together. I'm really excitedand a bit nervous at the same time."
Rosie said "It feels really nice to be doing something to help Eli and hopefully get lots of people to know about the Duchenne Children's Trust It is dreadful that the older children like Eli get, the less able they become to do things that I take for granted."
The planes will be flying at speeds of 70-80 miles an hour, possibly up to 100 mph.
The aircraft will only be two metres apart wingtip to wingtip and flying just 30 feet off the ground as they make their passes over the airstrip.
The two girls have been given instructions on how to signal to the pilots: Thumbs up and a big scream means they're enjoying themselves. Thumbs down if they want to stop.
And if the girls are feeling very comfortable they're hoping to attempt a 'superwoman' pose as well.
Rose Powell and Flame Brewer, both nine-years-old, have become the youngest in the world to perform wingwalking stunts in formation.