United Airlines has fares as low as $587 from Los Angeles LAX to Oslo OSL Norway. In combination with SAS and Swiss on some itineraries, there are fares in the low $600s to Gothenburg GOT, Copenhagen CPH, Stockholm ARN and a couple of other Scandinavian airports.
Departure dates for lowest fares are April to mid-June with fares in mid-$600s returning for departures in mid-August.
United Airlines Los Angeles LAX – Newark EWR – Oslo OSL
$586.66 Tuesday May 10 – Tuesday May 17
SAS Los Angeles LAX – Stockholm ARN – Gothenburg GOT
$606.86 Monday August 15 – Monday August 22
One of the latest June departures for low fare tickets to Europe is flying LAX to Copenhagen on June 14.
United Airlines – SAS – Swiss
$672.66 Tue June 14 – Tue June 28
United Airlines: Los Angeles LAX – Newark EWR – Edinburgh EDI –
SAS: Edinburgh EDI – Copenhagen CPH
Swiss: Copenhagen CPH – Zurich ZRH – Los Angeles LAX