What would you do? Low fare vs. miles
Chicago-DEN.
$160 on United, earning miles plus 5,000 bonus for flying before 2/28 (6700 total miles).
OR
$100 on Southwest with today's Ding fare, earning 2 RR credits.
This is for my girlfriend, who is not a terribly frequent traveller but likes the idea of accumulating miles, and also likes to save money.