ABOVE SOUTH SUDAN — In an unprecedented move, Sudan on Sunday allowed an Israeli plane to cross through the air space it controls.

The flight, carrying Prime Minister Benjamin Netanyahu back to Israel from a lightning visit to Chad, jetted over South Sudan, whose skies are under the control of the civil aviation authorities in Khartoum.

The flight came hours after Netanyahu lauded Israeli “inroads” with the Islamic world as he and Chadian President Idriss Deby resumed ties, and amid a reported diplomatic push to reach an understanding with Khartoum to routinely allow Israeli overflights above Sudan to shave hours off flights to western Africa and Latin America.

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Israel has friendly relations with South Sudan, but the country’s airspace is controlled by its northern neighbor, which does not have diplomatic ties with the Jewish state.

Sunday’s flight marked the first time an Israeli aircraft was allowed to fly over South Sudan, officials in the prime minister’s entourage said.

South Sudan, which is predominantly Christian, gained independence from Muslim Sudan several years ago, and the two countries are still hostile to each other. However, South Sudan’s civil aviation remains under Khartoum’s control.

The Prime Minister’s Office asked reporters who accompanied Netanyahu to and from Chad not to publish the fact that the flight home was being routed over South Sudan before the plane had landed at Tel Aviv’s Ben-Gurion Airport late on Sunday night, presumably for security reasons and to prevent any last-minute efforts from other parties to change the decision by the Sudanese authorities.

Shortly after takeoff, the captain announced that this was a “historic flight,” and that thanks to the shortcut the return flight would be about one hour shorter than the trip’s outbound leg.

Earlier on Sunday, the prime minister’s plane took a long detour en route to Chad, flying south over the Red Sea and then across Eritrea, Ethiopia, Kenya, Uganda, the Democratic Republic of the Congo and the Central African Republic before entering Chadian airspace.

On the return flight, the El Al air craft flew from N’Djamena south to the Central African Republic, but then turned eastward to cross over central South Sudan, from where it continued to Ethiopia and Eritrea to the Red Sea.

Netanyahu had flown to Chad on Sunday to declare the resumption of diplomatic ties with the Muslim-majority country, together with Déby.

It was unclear whether Sudan’s decision to let Netanyahu’s jet fly over South Sudan was connected to Chad’s move to resume ties. In November, Deby said during a visit to Israel that he would be willing to help Israel and Sudan negotiate forging relations with Israel.

Khartoum had said recently it was not changing its policy of forbidding Israeli planes from entering its airspace. Earlier this month, a Sudanese television station reported that Sudanese leader Omar al-Bashir refused an request by a Kenyan airline to use its airspace for a flight to Tel Aviv.

However, Sunday’s unprecedented flight may indicate that Khartoum is willing to show flexibility regarding flyovers of third states under the control of its civil aviation authority.

Netanyahu, who also serves as Israel’s foreign minister, has in recent years pushed to open more flight paths to the Jewish state, including a direct route to India over Saudi Arabia and Oman.

Israeli and South American officials recently agreed to open a direct flight between Santiago and Israel, though the plane would still have to skirt Sudan, adding several hours to the time in the air.

Sudan has in recent years moved away from the geopolitical influence of Iran, which officials in the West have seen as an opportunity for a diplomatic breakthrough.

In the past, Sudan allegedly served as a way-station for the transfer of Iranian weapons to the Hamas terrorist group in Gaza. Israel has reportedly intercepted and destroyed transfers of weapons from Sudan bound for Gaza.

However, since it broke ties with Iran, Sudan is no longer perceived by Israel as a threat, but rather as a potential ally.

On Sunday, Israel added a record 160th country to the list of nations with which it has a diplomatic relationship, signing an agreement to resume bilateral ties with Chad.

Chad, a country of 15 million people, had severed ties in 1972 at the behest of Libyan dictator Muammar Gaddafi.

“We are making inroads into the Islamic world,” Netanyahu declared Sunday at N’Djamena’s presidential palace, minutes before he signed the formal document sealing the resumption of diplomatic relations.

“We are making history and we are turning Israel into a rising global power.”

A few moments later, at a briefing for the traveling press, Netanyahu said that Jerusalem’s increasingly robust ties with the Arab world are helping Israel break the ice with Muslim-majority states in Africa that do not have formal diplomatic relations with Israel.

“This visit first and foremost teaches us about our standing in the Arab world,” Netanyahu said. “Not only that there wasn’t any opposition, but also, I say this unofficially, there was some support.”

He declined to say which countries expressed support for Chad’s decision to establish ties with Israel nearly 50 years after they were severed.