The Saudi Arabia airport attacks have made Middle East travel more unpredictable. Here's what to know.

Riyadh's airport is closed until at least Saturday.

Bernd von Jutrczenka/picture alliance via Getty Images Riyadh airport, one of the busiest in the Middle East, has been closed for a week after missile attacks.

The US State Department has told Americans to reconsider travel to Saudi Arabia.

Delta has also suspended the launch of a new route to Saudi.

Here's what to do if you're affected.

Travel to Saudi Arabia and the broader Middle East is looking increasingly unpredictable this fall after a series of Houthi attacks on airports, including in the capital, Riyadh.

The latest attacks killed 13 people and wounded hundreds last Saturday.

Another strike the following day killed one person and injured about a dozen more.

Flights to and from Riyadh have been suspended all week, and while the airport is set to reopen on Sunday, this has yet to be confirmed.

The Houthis , an Iran-backed Yemeni militant group, control territory around the Bab el-Mandeb Strait, a key shipping route linking the Red Sea and the Gulf of Aden.

They have been attacking Saudi infrastructure amid an escalating regional conflict.

Saudi Arabia has supported Yemen's internationally recognized government in the country's civil war, which began in 2014.

Many airplanes continue to fly over eastern Saudi Arabia, including on routes to hubs in Qatar and Dubai and onward to East Asia.

The US State Department told Americans to reconsider travel to Saudi Arabia because of the risk of missile and drone attacks, armed conflict, and terrorism.