Inverness Airport was calm on Thursday despite heightened security following an alleged terrorist threat against air transport.
Yvonne Smith and her daughter Amber flew from Kirkwall
A number of flights were delayed and certain arrivals and departures to London were cancelled.
James Walton, Inverness Airport manager, urged travellers to check with airlines for details on their flights.
Police said they had increased their presence at Inverness with high visibility patrols.
Northern Constabulary's head of operations, Ch Supt Bruce Duncan, said: "Uniformed and plain clothes patrols have now been enhanced at the airport and will continue at the increased level until further notice.
"Additional patrols are also being made across the Northern area at other, smaller airports."
Emergency measures were rolled out at all 10 terminals run by Highlands and Islands Airports Limited (HIAL).
Mr Walton said travellers had been happy to comply with the new restrictions.
It forced people to give up personal effects such as books and MP3 music players as hand luggage. These were put in their baggage destined for the hold.
Mr Walton said: "First thing this morning we reviewed our procedures and the main change that had to be implemented was that passengers are not going to be allowed to take cabin baggage on to the aircraft.
"Some of the early morning flights got away on time, but the flight down to London was delayed by about two hours."
Security notice at Inverness Airport
Mr Walton said he anticipated disruption during the course of the day and urged travellers to call their airline or travel agent for the latest details on their flight, before setting off.
Information about the raised level of security was taped to a board in front of the check-in desks, below the hand written words "security notice" in day-glo pink pen.
Yvonne Smith, who had flown into Inverness from Kirkwall in Orkney with her three-year-old daughter Amber, said she was not alarmed by the increased security at check-in.
She said: "I wasn't concerned. They were very thorough in their checks so they are doing everything they can."