Federal Aviation Administration
The flight restrictions, which included airspace over the Persian Gulf and Gulf of Oman, came after Iran launched an attack on military bases in Iraq.
In the continued aftermath of two fatal crashes, grounded Boeing 737 Max jets will lead to thousands of flight cancellations in the coming months.
The government issued a statement Wednesday saying Boeing will need to "mitigate" the issue before the Max 8 jets could be put back in service.
Dennis Muilenburg conceded the planemaker made an error in its in handling of a warning-system problem in its 737 Max jet.
The pilot, who crashed atop a midtown Manhattan high-rise, was not licensed to fly in the kind of weather the city had that day.
Approximately 115 flights will be canceled per day through Sept. 3, the airline said on Sunday.
Boeing finally told the FAA about a problem with its 737 Max aircraft 13 months after it discovered the problem.
The Lion Air's pilots reportedly flipped through a manual to find help instead of disengaging the system.
The Federal Aviation Administration said there was "no basis" to ground the plane, despite the recent crash in Ethiopia.
The Max 8 is the same plane at the center of a growing global ban by more than 40 countries following a fatal crash in Ethiopia.