From the NCAA website, pg 12.

http://www.ncaa.org/library/handbook...l_handbook.pdf

Pairings
[Reference: Championship Structure (page 11) in this handbook and Bylaw 31.1.3 in the NCAA Manual.]
All pairings will be made by the Division I football committee. The following principles are applied when pairing teams:
1. The teams awarded the top four seeds are placed in the appropriate positions in the bracket (Nos. 1 and 4 in the upper half, and Nos. 2 and 3 in the lower half), and will be paired with teams that are in closest geographic proximity;
2. The remaining teams will be paired according to geographic proximity and placed in the bracket according to geographic proximity of the four pairings previously placed in the bracket.
3. Teams from the same conference will not be paired for first-round games;
4. Once the first-round pairings have been determined, there will be no adjustments to the bracket.

UNH to UNI- 1337 miles EKU, or any CCA team is closer
EWU to McNeese- 2584 miles ASU, Wofford, much closer
Wofford to Montana - 2328 miles Any team is closer
EIU to SIU - 159 miles check