Record*: 87-101, .463 W-L% (7th of 11) (Schedule and Results)
*W-L-T adjusted to 83-95 by NCAA.
SRS: -2.98 (8th of 11) ▪ SOS: -1.73 (8th of 11)
Division Champions: Air Force (Mountain) and Brigham Young (Pacific)
Conference Champion: Air Force (Won Championship Game 20-13)
Ranked in Preseason AP Poll: 1 (Colorado State)
Ranked in Final AP Poll: 1 (Air Force)
| Rk | Date | Day | Winner/Tie | Pts | Loser/Tie | Pts | Notes | |
|---|---|---|---|---|---|---|---|---|
| 1 | Sep 5, 1998 | Sat | Rice | 23 | Southern Methodist | 17 | ||
| Rk | Date | Day | Winner/Tie | Pts | Loser/Tie | Pts | Notes | |
| 2 | Sep 12, 1998 | Sat | Air Force | 52 | @ | Nevada-Las Vegas | 10 | |
| Rk | Date | Day | Winner/Tie | Pts | Loser/Tie | Pts | Notes | |
| 3 | Sep 17, 1998 | Thu | Air Force | 30 | Colorado State | 27 | ||
| 4 | Sep 19, 1998 | Sat | Utah | 30 | Hawaii | 21 | ||
| Rk | Date | Day | Winner/Tie | Pts | Loser/Tie | Pts | Notes | |
| 5 | Sep 26, 1998 | Sat | Colorado State | 38 | Nevada-Las Vegas | 16 | ||
| 6 | Sep 26, 1998 | Sat | San Jose State | 37 | New Mexico | 20 | ||
| 7 | Sep 26, 1998 | Sat | Texas Christian | 35 | (23) Air Force | 34 | ||
| Rk | Date | Day | Winner/Tie | Pts | Loser/Tie | Pts | Notes | |
| 8 | Oct 3, 1998 | Sat | Air Force | 56 | New Mexico | 14 | ||
| 9 | Oct 3, 1998 | Sat | Colorado State | 20 | @ | Texas-El Paso | 17 | |
| 10 | Oct 3, 1998 | Sat | Fresno State | 31 | Brigham Young | 21 | ||
| 11 | Oct 3, 1998 | Sat | San Diego State | 24 | @ | Tulsa | 14 | |
| 12 | Oct 3, 1998 | Sat | Southern Methodist | 28 | @ | Hawaii | 0 | |
| 13 | Oct 3, 1998 | Sat | Wyoming | 27 | Utah | 24 | ||
| Rk | Date | Day | Winner/Tie | Pts | Loser/Tie | Pts | Notes | |
| 14 | Oct 9, 1998 | Fri | San Diego State | 35 | Hawaii | 13 | ||
| 15 | Oct 10, 1998 | Sat | Brigham Young | 38 | Nevada-Las Vegas | 14 | ||
| 16 | Oct 10, 1998 | Sat | Colorado State | 34 | Tulsa | 7 | ||
| 17 | Oct 10, 1998 | Sat | San Jose State | 20 | Rice | 17 | ||
| 18 | Oct 10, 1998 | Sat | Texas Christian | 21 | Fresno State | 10 | ||
| 19 | Oct 10, 1998 | Sat | Texas-El Paso | 22 | @ | New Mexico | 19 | |
| 20 | Oct 10, 1998 | Sat | Wyoming | 12 | Southern Methodist | 7 | ||
| Rk | Date | Day | Winner/Tie | Pts | Loser/Tie | Pts | Notes | |
| 21 | Oct 17, 1998 | Sat | Brigham Young | 31 | @ | Hawaii | 9 | |
| 22 | Oct 17, 1998 | Sat | Rice | 14 | Tulsa | 10 | ||
| 23 | Oct 17, 1998 | Sat | San Diego State | 36 | @ | New Mexico | 33 | |
| 24 | Oct 17, 1998 | Sat | Southern Methodist | 10 | Texas Christian | 6 | ||
| 25 | Oct 17, 1998 | Sat | Texas-El Paso | 28 | San Jose State | 21 | ||
| 26 | Oct 17, 1998 | Sat | Utah | 24 | Fresno State | 16 | ||
| 27 | Oct 17, 1998 | Sat | Wyoming | 28 | @ | Nevada-Las Vegas | 25 | |
| Rk | Date | Day | Winner/Tie | Pts | Loser/Tie | Pts | Notes | |
| 28 | Oct 24, 1998 | Sat | Air Force | 42 | @ | Tulsa | 21 | |
| 29 | Oct 24, 1998 | Sat | Brigham Young | 46 | San Jose State | 43 | ||
| 30 | Oct 24, 1998 | Sat | Colorado State | 42 | Texas Christian | 21 | ||
| 31 | Oct 24, 1998 | Sat | Fresno State | 32 | Texas-El Paso | 6 | ||
| 32 | Oct 24, 1998 | Sat | New Mexico | 30 | @ | Hawaii | 20 | |
| 33 | Oct 24, 1998 | Sat | San Diego State | 21 | Utah | 20 | ||
| 34 | Oct 24, 1998 | Sat | Southern Methodist | 10 | Nevada-Las Vegas | 7 | ||
| 35 | Oct 24, 1998 | Sat | Wyoming | 34 | Rice | 24 | ||
| Rk | Date | Day | Winner/Tie | Pts | Loser/Tie | Pts | Notes | |
| 36 | Oct 29, 1998 | Thu | Brigham Young | 13 | San Diego State | 0 | ||
| 37 | Oct 31, 1998 | Sat | Air Force | 31 | Southern Methodist | 7 | ||
| 38 | Oct 31, 1998 | Sat | Fresno State | 28 | @ | New Mexico | 20 | |
| 39 | Oct 31, 1998 | Sat | Rice | 35 | Colorado State | 23 | ||
| 40 | Oct 31, 1998 | Sat | Texas-El Paso | 30 | Hawaii | 13 | ||
| 41 | Oct 31, 1998 | Sat | Tulsa | 20 | @ | Nevada-Las Vegas | 16 | |
| 42 | Oct 31, 1998 | Sat | Utah | 49 | @ | San Jose State | 17 | |
| 43 | Oct 31, 1998 | Sat | Wyoming | 34 | @ | Texas Christian | 27 | |
| Rk | Date | Day | Winner/Tie | Pts | Loser/Tie | Pts | Notes | |
| 44 | Nov 7, 1998 | Sat | Brigham Young | 46 | New Mexico | 21 | ||
| 45 | Nov 7, 1998 | Sat | Rice | 14 | @ | Texas Christian | 12 | |
| 46 | Nov 7, 1998 | Sat | San Diego State | 10 | Fresno State | 0 | ||
| 47 | Nov 7, 1998 | Sat | San Jose State | 45 | @ | Hawaii | 17 | |
| 48 | Nov 7, 1998 | Sat | Southern Methodist | 33 | Tulsa | 3 | ||
| 49 | Nov 7, 1998 | Sat | Utah | 34 | Texas-El Paso | 27 | ||
| 50 | Nov 7, 1998 | Sat | Wyoming | 27 | @ | Colorado State | 19 | |
| Rk | Date | Day | Winner/Tie | Pts | Loser/Tie | Pts | Notes | |
| 51 | Nov 14, 1998 | Sat | (23) Air Force | 10 | @ | (25) Wyoming | 3 | |
| 52 | Nov 14, 1998 | Sat | Brigham Young | 31 | @ | Texas-El Paso | 14 | |
| 53 | Nov 14, 1998 | Sat | Colorado State | 32 | @ | Southern Methodist | 10 | |
| 54 | Nov 14, 1998 | Sat | Fresno State | 51 | Hawaii | 12 | ||
| 55 | Nov 14, 1998 | Sat | Rice | 38 | Nevada-Las Vegas | 16 | ||
| 56 | Nov 14, 1998 | Sat | San Diego State | 34 | @ | San Jose State | 6 | |
| 57 | Nov 14, 1998 | Sat | Texas Christian | 17 | @ | Tulsa | 7 | |
| 58 | Nov 14, 1998 | Sat | Utah | 41 | @ | New Mexico | 7 | |
| Rk | Date | Day | Winner/Tie | Pts | Loser/Tie | Pts | Notes | |
| 59 | Nov 21, 1998 | Sat | (20) Air Force | 22 | Rice | 16 | ||
| 60 | Nov 21, 1998 | Sat | Brigham Young | 26 | @ | Utah | 24 | |
| 61 | Nov 21, 1998 | Sat | Fresno State | 24 | San Jose State | 21 | ||
| 62 | Nov 21, 1998 | Sat | San Diego State | 34 | Texas-El Paso | 29 | ||
| 63 | Nov 21, 1998 | Sat | Texas Christian | 41 | @ | Nevada-Las Vegas | 18 | |
| 64 | Nov 21, 1998 | Sat | Tulsa | 35 | Wyoming | 0 | ||
| Rk | Date | Day | Winner/Tie | Pts | Loser/Tie | Pts | Notes | |
| 65 | Dec 5, 1998 | Sat | (17) Air Force | 20 | Brigham Young | 13 | WAC Championship (Las Vegas, NV) |