Al Nassr and Al Wasl did not play on Monday. The AFC postponed the match on Sunday.
The match was set for Al-Awwal Park in Riyadh. It was a third round game.
The AFC gave no reason for the postponement. It gave no new date either.
Saudi media reported that Al Wasl's delegation had not reached Riyadh.
Travel disruptions and a lack of flights stopped the Dubai club from travelling.
The Saudi federation said flight permits and plans were complete.
The match commissioner and the refereeing team had already reached Riyadh.
Cristiano Ronaldo is 18 goals short of 1000 career goals, says Sportstar.
Three Saudi Pro League games were postponed this month for logistics.
Al Hilal were told to travel by road for Al Sadd. Their rivals' game was postponed.
Al Hilal beat Al Sadd by two goals to nil in Qatar. They lead on six points.
Read the full plain-words explainer on Rive News for every detail.
Get the full breakdown, key numbers, and what happens next.
Read on Rive News