Let's Go See A College Football Game

Some quick research. Distances/times are via Google Maps, flight estimates are from Philadelphia because that's what Google Flights gives me.

Michigan 

Home games: 9/16 (Air Force), 10/7 (Michigan State), 10/28 (Rutgers), 11/4 (Minnesota)

Airport: Detroit
Distance to stadium: 27.5 miles (30 minutes)
Flight price: less than $100 on Spirit

LSU

Home games: 9/23 (Syracuse), 9/30 (Troy), 10/14 (Auburn), 11/11 (Arkansas)

Airport: Baton Rouge
Distance to stadium: 10 miles (20 minutes)
Flight price: mid-$200's on American/Delta

Airport: New Orleans
Distance to stadium: 73 miles (70 minutes)
Flight price: low-$200's on Frontier/American/Delta

Ohio State

Home games: 9/16 (Army), 9/23 (UNLV), 10/7 (Maryland), 10/28 (Penn State), 11/11 (Michigan State), 11/18 (Illinois)

Airport: Columbus
Distance to stadium: 10 miles (20 minutes)
Flight price: high-$200's on American

Clemson

Home games: 9/23 (Boston College), 10/7 (Wake Forest), 10/28 (Georgia Tech), 11/11 (Florida State), 11/18 (Citadel)

Airport: Greenville
Distance to stadium: 35 miles (55 minutes)
Flight price: high-$200's on American

UCLA

Home games: 9/30 (Colorado), 10/21 (Oregon), 11/11 (Arizona State)

Airport: LAX
Distance to stadium: 29 miles (60 minutes)
Flight price: low-$300's on Spirit, mid-$300's on Delta/American

Alabama

Home games: 9/16 (Colorado State), 9/30 (Ole Miss), 10/14 (Arkansas), 10/21 (Tennessee), 11/4 (LSU), 11/18 (Mercer)

Airport: Birmingham
Distance to stadium: 63 miles (60 minutes)
Flight price: mid-$300's on American

Tennessee

Home games: 9/23 (UMass), 9/30 (Georgia), 10/14 (South Carolina), 11/4 (Southern Miss), 11/19 (LSU)

Airport: McGhee Tyson Airport (Knoxville)
Distance to stadium: 13 miles (25 minutes)
Flight price: mid-$300's on United, high-$400's on American

Wisconsin

Home games: 9/30 (Northwestern), 10/14 (Purdue), 10/21 (Maryland), 11/11 (Iowa), 11/18 (Michigan)

Airport: Madison
Distance to stadium: 8 miles (25 minutes)
Flight price: high-$300's on American/Delta

Texas

Home games: 10/7 (Kansas State), 10/14 (Oklahoma**), 10/21 (Oklahoma State), 11/11 (Kansas)

Airport: Austin
Distance to stadium: 10 miles (30 minutes)
Flight price: low-$400's on American/United

**Game is being played in Dallas at the Cotton Bowl, which is 24 miles/35 minutes from DFW Airport. Flights are currently in the mid-$300's for that weekend.

I didn't look at schedules for the rest of my list because the flights are all either super expensive or there isn't a convenient airport close to the stadium. Here are some other options though...

Florida

Airport: Gainesville
Distance to stadium: 6 miles (20 minutes)
Flight price: mid-$400's on American/Delta

Auburn

Airport: Columbus, GA
Distance to stadium: 41 miles (60 minutes)
Flight price: mid-$400's on Delta

Baylor

Airport: Waco
Distance to stadium: 8 miles (15 minutes)
Flight price: high-$400's on American

Florida State

Airport: Tallahassee
Distance to stadium: 6 miles (15 minutes)
Flight price: low-$500's on American/Delta

Texas A&M

Airport: Easterwood (College Station)
Distance to stadium: 3 miles (10 minutes)
Flight price: high-$500's on American, low-$600's on United

Airport: Houston (George Bush)
Distance to stadium: 90 miles (100 minutes)
Flight price: high-$200's on United

Oregon

Airport: Eugene
Distance to stadium: 12 miles (25 minutes)
Flight price: low-$600's on United/American