FWIW -
I would defer to
andymo99 any answers given about Expedia, as he is decidedly the one who knows
and I've made no secret of the folks who pay my paycheque - but with the disclaimer that I only know what Delta's P&P's are, and no matter where someone books a ticket, they should
ALWAYS read the fare rules, especially those regarding cancellation and changes, and mileage acquisition.