Please be aware that Stockholm has multiple airports and that these results are only for Stockholm Arlanda Airport.
The best day to arrive at Stockholm is Tuesday and it would be best to avoid Friday, as prices are on average 38.85% higher than on Tuesday. (Average prices, based on 230 datapoints.)
From Stockholm it is on average the cheapest to fly to Copenhagen and to Oslo. (Average prices, based on 97 datapoints.)
From Stockholm most of the flights depart to Amsterdam, second best connected from Stockholm is London. (Daily flights, based on 61 datapoints.)