Wizz Air flew almost three million passengers in July as the airline continued to rebuild its network.
Carryings rose by 62% from 1.8 million in the same month last year during the first wave of the Covid-19 pandemic.
The Hungarian budget airline raised capacity by a quarter year-on-year to provide more than 3.7 million seats.
The load factor also improved by 18 percentage points to 78.5% over July last year.
But annual passenger numbers remain 52% down at 13.5 million against 28.3 million carried in the 12 months to July 2020.
The airline postponed the opening of a new base at Cardiff airport from July 30 just 24 hours after confirming the date.
However, Wizz Air opened a base at Rome Fiumicino airport last month with four Airbus A321 aircraft, providing 32 new services.
Wizz Air UK also restarted flights from Doncaster Sheffield airport on Monday to Alicante, Burgas in Bulgaria, Kosice in Slovakia and Poznan in Poland.