Is there a way to get a group discount on airfares?

[Tycoonx]

My cousin's wedding will be this summer in Michigan, and there are about 30 of us here in SF Bay that are going to fly out there. Not all of us will probably fly/return on the same day, but I was wondering if I could get a group airfare discounts. Anyone have any travel agent experience? I usually just purchase my tickets from expedia, travelocity, orbitz, or individual air carrier. So far it's around $250 each on an all day flight to Michigan through Southwest Airline. Northwest Airline provides direct flight to Detroit for $450'ish. Since my aunt will be paying for all the flights, I don't think she would justify paying $200 more for each person. Oh yeah, what's a good credit card I could apply for to get the most benefit from ordering all these flights? I have Discover Card but I think I'll only get .002 % of what I spent back. Maybe I should get those Delta Skymiles CC.

 

[Tycoonx]

Anyone?

 

[bunker]

Honestly, give either the airline or a travel agent a call. You'll get an answer much quicker than waiting for a reply here.