Wizz Air Holdings has signed an early-stage agreement with Airbus relating to the purchase of a further 146 Airbus A320neo family aircraft, worth more than $17.2b at current list prices.
Discounts on the planes, however, will be granted by Airbus, Wizz Air said.
Deliveries are expected start in 2022, though the bulk of the aircraft will be delivered in 2025 and 2026.
Under the memorandum of understanding, Wizz Air has the right to substitute a number of the A320neo aircraft with the Airbus A321neo and vice versa.
Completion of the order remains subject to approval by Wizz Air shareholders.