Twelve of the aircraft will be turned into a firm order and the remaining 12 are purchase rights.
Bombardier has revealed that EgyptAir is planning to acquire up to 24 C-Series aeroplanes. The deal is valued at $1.1 billion before discounts.
No Middle East customer has said when it would take delivery of CSeries jets.More news: His Asia trip winding down, Trump meets with allies
Earlier this month an unnamed European airline said it meant to buy at least 31 of the C-Series planes. The aircraft had been plagued by delays and cost overruns, and recently was hit with potentially crushing tariffs in the USA after a trade complaint by Boeing.
A USA trade commission will decide in early 2018 on whether to impose duties of almost 300 percent on the CSeries, after Boeing complained the planes had been subsidised and sold below cost in the United States. The jet, the larger of two C Series versions, can carry 130 to 160 passengers.
Bombardier and EgyptAir said they hoped to finalize the deal before the end of 2017, the statement added. Airbus has also been in talks to secure a commitment from the carrier, the people said.