British Airways one part of One World Alliance is offering cheap flights from Scandinavia to USA. San Francisco from Oslo during for 373 EUR round trip!
Oslo (OSL) – San Francisco (SFO),
San Francisco (SFO) – London (LHR),
London (LHR) – Oslo (OSL).
How to book:
Visit Budgetair.it and select stopover and next past route as above
One cabin bag and one piece of checked in baggage up to 23 kg per passenger.