11-12 flights were affected due to the blaze which took place due to bursting of crackers to chase away birds near the runway, a Lucknow Airport source said.
The fire broke out at around 1.50 pm and 11 fire tenders including 10 from the Airports Authority of India Fire Department, were rushed in to douse the flames.
"The fire personnel managed to douse the blaze within an hour," a source said.
Operations of about a dozen flights were affected due to the fire as the runway remained closed during the entire period, they added.