"Harry & Meghan: An African Journey," filmed during the royals' recent African tour, premiered in the U.K. on Sunday.
The flights would have generated seven times more carbon emissions per person than a standard commercial flight.
"A lot of people are moving here. So, what can I say? No, I didn't know that [Meghan Markle] was nasty," President Trump told British Tabloid The Sun in an interview ahead of his visit to the U.K.
A royal historian has argued the duchess has never been as powerful as she is today.
Aerial photos captured the couple's dining, living and sleeping areas.
In the U.K., most women gave birth at home until the 1960s.
Samantha Markle appeared on several talk shows prior to Meghan and Prince Harry's wedding to talk about their relationship.
The Duchess of Sussex page went live on Sunday on the official Royal Family website.