United Airlines and Star Alliance members Swiss, Lufthansa and Brussels Airlines offer San Francisco SFO to Budapest BUD at $662 to $690 from this week into mid-March 2016. Skyteam also has this route on sale for a few dollars more.
United Airlines ticket flying UA, LH and LX
San Francisco SFO – Chicago ORD – Zurich ZRH – Budapest BUD – Frankfurt FRA – Vancouver YVR – San Francisco SFO
$670.80 ($529 base fare)
Saturday February 13 – Sunday February 21
Delta Airlines ticket flying DL, AF and KL
San Francisco SFO – New York JFK – Paris CDG – Budapest BUD –Amsterdam AMS – San Francisco SFO
$686.80 ($553 base fare)
Tuesday November 17 – Friday November 27
There have been few fares under $700 for USA-Europe routes outside of Scandinavia from major carriers these past two months. This is a promising sign that more routes may become available at lower fares for winter travel.