Highlands and Islands Airports Limited (Hial) runs sites in the Highlands, Western Isles, Orkney and Shetland, Argyll and Dundee Airport.
Inverness was the company's busiest site with 657,661 passengers - 6% more than the previous year.
Sumburgh had an 8% increase in passenger numbers and Barra 14%.
However, Dundee's passenger numbers were down 17%.
Barra's runway is a strip of beach, which Hial said added to the appeal for tourists visiting the island.
Hial said because it was a publicly-funded company, it had historically operated at a commercial loss in order to sustain its lifeline services.
In 2014-15, the group recorded an operating loss of £442,000 compared to £3.8m on the previous year.
It said the improved performance was due to Scottish government subsidies returning to normal levels of £20.1m in 2014-15 from £14.9m in 2013-14.

At the time Laachraoui was known as "Abou Idriss", a lawyer for two of the ex-hostages told French media.
The hostages were freed in April 2014.
Laachraoui and Ibrahim el-Bakraoui died when they attacked Brussels Zaventem airport a month ago. Their bombs and a third in the metro killed 32 people.
The confirmation about Laachraoui's role as an IS prison guard in Syria came from lawyer Marie-Laure Ingouf.
Laachraoui was a 24-year-old Belgian electrical engineer from the Brussels suburb of Schaerbeek. He had links to the jihadists who attacked Paris in 2015.
The French daily Le Parisien reports that Laachraoui kept watch over the four Frenchmen with Mehdi Nemmouche, the jihadist accused of killing four people at the Brussels Jewish Museum in May 2014. Nemmouche is now in Belgian custody.
The Frenchmen - Didier Francois, Pierre Torres, Edouard Elias and Nicolas Henin - spent 10 months in IS captivity. They had been captured in June 2013.
Laachraoui and Nemmouche disappeared at the end of January 2014, according to the ex-hostages.

The 34-year-old was struck on Lochend Road, near the junction with Auchingill Road just after midnight.
He was taken to Glasgow Royal Infirmary with serious injuries.
Sgt Andy Shearer of Police Scotland said inquiries were at an early stage and appealed for anyone with information to get in touch.

Y gred yw bod mwy nac un person wedi eu hanafu, ond nid oedd unrhyw gerbydau eraill yn rhan o'r digwyddiad.
Dywedodd llefarydd ar ran Y Weinyddiaeth Amddiffyn: "Rydyn ni'n ymwybodol o ddigwyddiad ym maes saethu Castell Martin.
"Mae'r ymchwiliad yn parhau ac felly byddai'n amhriodol gwneud unrhyw sylw pellach."
Dywedodd Gwasanaeth Ambiwlans Cymru eu bod wedi eu galw i'r digwyddiad am tua 15:30 ddydd Mercher.
Cafodd Gwasanaeth Tân ac Achub Canolbarth a Gorllewin Cymru eu galw yno hefyd.
Mae gwybodaeth ar wefan y ganolfan yn dweud bod disgwyl i fwledi byw gael eu tanio yno drwy gydol yr wythnos.
Mae'r safle dros 5,900 acer ar hyd arfordir Sir Benfro.
The operator of Scotland's 11 regional airports handled more than 1.4 million passengers in the 12 months to March 2015, according to its annual report.
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One of the Brussels airport bombers, Najim Laachraoui, guarded four French journalists who were held hostage by so-called Islamic State (IS) in Syria in 2013-2014, the ex-hostages say.
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A man is in a critical condition after being hit by a bus in the Easterhouse area of Glasgow.
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Mae'r Weinyddiaeth Amddiffyn yn parhau i ymchwilio yn dilyn digwyddiad yn ymwneud â thanc ar faes tanio Castell Martin yn Sir Benfro ddydd Mercher.