An Israeli court has rejected an Irish Nobel Peace Prize laureate's appeal against her deportation orders over entering Israel while being banned from the country.

Mairead Corrigan Maguire was detained at an airport lockup earlier this week for violating the conditions of her ban imposed in June, when she tried to reach Gaza aboard a blockade-busting ship.

At the time, Maguire was told she couldn't return for 10 years except with special approval.

The district court rejected her appeal Friday but gave her 48 hours to allow time for a Supreme Court appeal.

The 66-year-old Maguire is an outspoken champion of Palestinian statehood. Israel has banned other pro-Palestinian activists from entering, including Jewish-American linguist Noam Chomsky in May.