Part of Newcastle Airport was evacuated on Saturday after a smoking vent set off a fire alarm.
The small fire, which started in ducting at the airport's Burger King outlet, was quickly extinguished by on-site fire crews.
About 350 travellers in the departure lounge were evacuated, but the rest of the facility was unaffected, said an airport spokeswoman.
A small number of outbound flights suffered minor delays, she added.
The alarms were triggered at about 1615 BST, by a "localised" fire.
A statement released by the airport read: "Customers and staff in the departure lounge were evacuated immediately. The incident occurred during a relatively quiet period of the day, affecting around 350 passengers.
"The incident was stood down just after 1700 BST and passengers were escorted back into the departure lounge shortly afterwards.
"A small number of outbound flights scheduled to depart at around the time of the incident suffered minor delays of approximately one hour as a result.
"The airport is operating as normal and passengers are asked to check in for flights as usual."
One of London's most well-known fish and chip restaurants has been gutted by fire that spread across four floors.
More than 40 firefighters battled the flames at the Sea Shell Restaurant in Lisson Grove, Marylebone.
A fire brigade spokeswoman said the ground floor of the restaurant was 50% destroyed while flames had spread up ducting to rooftop level.
Lisson Grove remains sealed off, causing major disruption in the surrounding area. No-one was hurt.
The BBC's John McManus, a religious affairs producer, was at the scene.
He said: "There were at least seven fire engines, an ambulance and a fast response vehicle.
"The front of the fish and chip shop is badly blackened and there was lots of smoke coming out.
"Lots of people were standing around watching. It must have caused massive traffic disruption."
The Sea Shell restaurant has been established more than 40 years.