Conrad Clitheroe and Gary Cooper, both from Stockport, and expat Neil Munro were reportedly taking notes near Fujairah Airport, 80 miles from Dubai, when they were arrested in February.
Relatives were told they were held for "national security" reasons. The men insisted they did not take photographs.
The Abu Dhabi hearing is due on Monday.
Mr Clitheroe, 54, and Mr Cooper 45, were visiting their friend Mr Munro, who was born in Manchester, when they were arrested on 22 February by an off-duty police officer who had seen them monitoring planes from a car.
They were near Fujairah Airport, where older and rarer aircraft can be seen.
A local police official said the men had been taking photographs near an airport and were using a telescope.
The men are expected to argue their actions were misinterpreted and are understood to be hoping to be granted bail.

The 25-year-old moved to the Red Rose from Somerset in 2013 and his new deal ties him to the club until 2019.
Short-format specialist Buttler has scored England's three fastest ODI centuries, including a 46-ball ton against Pakistan last year.
"Jos is one of the most talented cricketers in the game," said cricket director and head coach Ashley Giles.
"His presence in last year's T20 Blast final at Edgbaston was a factor in us winning the competition.
"Jos is a great guy to have in the dressing room too and his experience at international level really benefits the squad."
Buttler, who has been playing in the Indian Premier League with Mumbai Indians, will return to Lancashire for Friday's T20 Blast home game against Durham.
A court hearing for British plane spotters held over allegations of suspicious behaviour in the United Arab Emirates has been postponed for a week.
[NEXT_CONCEPT]
England wicketkeeper Jos Buttler has signed a new three-year contract with Lancashire.