Originally Posted by SEA_Tigger
As the minimum fare basis for mileage upgrades is H, you can buy up to H (usually just the difference between the V and H fare with no change fee), you can hope for an offer of a paid upgrade at checkin/the gate (runs around $325 based on reports), or you can hope for an operational upgrade at checkin/the gate.
Yes, provided the OP has 60,000 miles then it seems safer and possibly cheaper to buy up to an H fare. The total fare difference should be no more than $300 I am guestimating?