I got a United offer last week with a likely mid-May start date. Right before my United interview, Delta emailed and I set an interview for early May. Based on a few factors (commute from ORF to IAD/EWR, ablity to probably get 756 immediately), I am going to go work for United. How should I deal with the Delta interview? Should I tell them my availability just moved from now to next fall or tell them that I got another job? Tell them "no"? I'm nearly positive I will be happy at United, but I would like to use Delta as a "safety".