Jared Kushner, advisor to the US President, left the Qatari capital, Doha, on Wednesday evening.
Gulf sources told Al-Jazeera Net that the coming hours will reveal whether his visit, which focused on finding a solution to the Gulf crisis, will be successful.
On the other hand, The New York Times quoted a diplomatic source as saying that Kushner raised the issue of diverting Qatari flights from Iran's airspace to Saudi Arabia in Qatar.
The source added that diverting these flights from Iran's airspace could deprive the latter of $ 100 million annual transit fees.
In turn, Bloomberg News quoted sources as confirming that Saudi Arabia and Qatar are close to concluding a preliminary agreement to end their dispute, with the efforts of the administration of US President Donald Trump.
The same sources added that efforts to resolve the dispute between the two sides include reopening the airspace and land borders, and also include other steps to rebuild confidence.
Kushner arrived in the region as part of a recent effort to resolve the crisis that began about 3 years ago, and official sources in the US administration told news agencies that his tour would include meetings with Saudi Crown Prince Mohammed bin Salman and Qatar's Emir Sheikh Tamim bin Hamad Al Thani.
The Wall Street Journal quoted US officials as saying that the main focus of the talks would be on resolving the dispute over Qatari aircraft flying over Saudi Arabia and the UAE.
The newspaper mentioned that the blockading countries secretly relaxed their 13 demands, noting that Saudi Arabia has shown greater willingness to find common ground to solve the crisis.
It is noteworthy that the State of Kuwait played the mediating role since the beginning of this crisis in an attempt to heal the Gulf rift.
About two weeks ago, Qatari Foreign Minister Sheikh Mohammed bin Abdul Rahman Al Thani confirmed that his country welcomes the dialogue based on respect for sovereignty, believing that there is no winner from the Gulf crisis.
Also, US National Security Adviser Robert O'Brien said in simultaneous statements that the Trump administration wanted to resolve the crisis before its possible departure from the White House.
Saudi Arabia, the Emirates, Bahrain and Egypt announced in June 2017 that they would sever their relations with Qatar and impose a blockade on it, and set 13 conditions for reversing the blockade and cutting ties, but Doha confirmed its rejection of everything that affects its sovereignty and independence of its national decision, affirming at the same time its readiness for dialogue on the basis of parity and respect Sovereignty.