And on Roundtrip vs. Oneway: In most cases roundtrip is way cheaper, even if you only require a oneway flight. The cheapest roundtrip from Vienna to San Franci

And on Roundtrip vs. Oneway: In most cases roundtrip is way cheaper, even if you only require a oneway flight. The cheapest roundtrip from Vienna to San Francisco is something like 700 EUR, with oneway it costs around twice as much for half the flights (1400 EUR). One notable exception for flights between US and Europe is Air Berlin, where oneway costs only half of roundtrip. But they only fly on certain days under the week and may therefore not show up when you search for a site. Next best option is to just book roundtrip and just let the return flight expire. Warning: Most airlines invalidate all the other flights after you've missed on of them. So make sure to only let the last flight(s) expire. And the most important rule at the end: Never ever (even if it's free) fly Air France or over CGD airport. The experiences I had there were (multiple times) so awfully bad that one wouldn't believe them if I told then.