Probably Basic Question - How do I book Y Fare
 

Sorry for what is, I'm sure, a basic question. I've noticed that some new promotions to various cities will give me extra miles if I buy a Y fare. Honestly I don't know how to use .bomb to buy a particular fare class. It always seems to show me the cheap tix W, S and other fare classes. Don't see an option for limiting the class. Is "Y" just code for refundable? Thanks.

When doing a flight search you can use the "upgrade" selection box and choose MILES-YB. That will typically give you the lowest fare available between Y & B. I don't know many promos that require a Y fare..usually B will work too. If you only get B fares using this drop down menu and you still really want a Y fare you will need to call and book it.