The Norwegian prosecutor's office had asked for a year behind bars for the captain, one of four members of the five-person airBaltic crew who were found to be over the legal flying limit.
The crew was detained in July on the tarmac in Oslo preparing for take-off despite spending a large part of the previous night drinking whisky and beer.
Blood tests showed the co-pilot was the most sozzled of the bunch but the captain, who had ultimate responsibility for the lives of more than a hundred passengers, was also comfortably over the 0.2 promiles blood alcohol limit on 0.54 promiles.
The co-pilot recorded a staggering 1.34 promiles - equivalent to 'completely smashed' on the everyman scale of inebriation.
After sufferuing a storm of negative publicity over the incident, airBaltic says it has stepped up security measures and sacked all four crew members for gross misconduct.
The co-pilot has already been handed a six-month sentence, which he is appealing, while two stewards were sentenced to four and six weeks respectively.