Google would use all the information it has to make assumptions about defaults to display. When you click-through to the site to make the booking or to drill in

Google would use all the information it has to make assumptions about defaults to display. When you click-through to the site to make the booking or to drill in further you can specify the details. eg. 'flight to LA' can show : SFO -> LAX Tod Tom Wed Thu Fri Orbitz $187 $210 $299 $330 $450 Travelocity $200 $350 - $89 - United.com etc. etc.