On Monday, Saudi Arabia, Egypt, the United Arab Emirates and Bahrain announced they were severing diplomatic relations with Qatar and closing air, sea and land access, greatly affecting travel.

Details are still unfolding as to why the cut-off happened, but recent reports suggest Russian hackers may have sparked the crisis, reporting Qatar supports terrorist organizations and maintains close ties to Iran.

The sudden announcement creates confusion for travelers, particularly for air travel as Qatar is surrounded by Saudi Arabia, the UAE and Bahrain — all of which banned flights to Qatar. Major long-haul carriers such as Doha-based Qatar Airways and Dubai’s Emirates suspended flights, leaving many passengers stranded at Gulf airports.

All flights in and out of Doha are forced through a limited airspace over the Gulf, heading toward Iran. Qatar Airways announced on its website it stopped flights to Saudi Arabia, and Emirates and Etihad Airways suspended flights to and from Doha. Passengers flying through Doha’s Hamad International Airport hub are advised to contact their airline before heading to the airport. Qatar Airways will temporarily offer a charter flight to carry its passengers from Saudi Arabia via Kuwait (KWI) to Doha.

FlyDubai, Air Arabia, Saudi Arabian Airlines, Gulf Air and Egyptair also cancelled flights to Qatar.

All airlines offer full refunds on unused tickets and free rebooking to alternate cities to customers booked on flights to and from Doha.

At this time, it’s unclear how long the disruption will last. Those traveling to, from or through Qatar are advised to contact their airline prior to going to the airport for updates. See below for contact information for airlines implicated by the recent event.

Emirates: Apply for a refund or contact a local office

Etihad: Call 971 2599 0000 or visit the website

FlyDubai: Call 971 600544445 or 974 4 4227350/51

Air Arabia: Call 971 6 5580000 or go to its website

Gulf Air: Call 973 17373737 or visit its website