Another fare alert for United Airlines and Star Alliance carriers low fare under $500 for San Francisco to Istanbul round trip. Lowest fares include Air Canada flights. For about $50 more you can fly United, Swiss, Turkish flights. These fares are available from late-August through March 2017. There is limited availability for low fare departure dates with about half the dates under $500 and around 25% at lowest fares. This UA economy K class fare has a 7-day minimum stay.
This fare is also available from Atlanta ATL for $442 round trip.
United Airlines ticket for Air Canada operated flights San Francisco SFO – Toronto YYZ – Istanbul IST
$425.16 Wed Nov 9 – Thu Nov 17
United Airlines ticket for United/Swiss/Turkish operated flights
San Francisco SFO – Chicago ORD – Zurich ZRH – Istanbul IST – Frankfurt FRA – San Francisco SFO
$476.56 Sun Oct 2 – Mon Oct 10
United Airlines Atlanta ATL – Washington IADÂ – Zurich ZRH -Istanbul IST – Toronto YYZ – ATL
$445.56  Mon Oct 3 – Mon Oct 10
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