Oneworld Alliance airline Iberia has flights from SFO to Lisbon, Portugal as low as $582 and Finnair offers Estonia and Lithuania in the low $600s from SFO and LAX for flights in July. LAX has more cities on sale with Finnair including Vienna, Austria; Copenhagen, Denmark and a few cities in Poland like Krakow priced in the $600s round trip. Flights to most cities in Europe are pricing over $1,000 round trip in July from LAX and SFO.
Finnair/American Los Angeles LAX – HEL – Krakow KRK
$600.17 round trip Sun July 10 – Thu July 21
Iberia Airlines/American SFO – Madrid MAD – Lisbon LIS – Philadelphia PHL – LAX -SFO
$581.47 round trip Mon July 18 – Tue July 26
Search Google Flights in Explore mode filtered for July one week trip.