| August |
| | 25 | | Council Grove High School | vs. | Onaga | 11-25,18-25 | |
| | Wabunsee Tournament-Pool Play | |
| | | | Immaculata High School | vs. | Onaga | 19-25,18-25 | |
| | Wabunsee Tournament-Pool Play | |
| | | | Onaga | vs. | Centralia | 11-25,13-25 | |
| | Wabunsee Tournament-Semifinal | |
| | | | Onaga | vs. | Wabaunsee High School | 25-22,7-25,20-25 | |
| | Wabunsee Tournament-3rd Place Match | |
| | | 9:00AM | Onaga | vs. | Wabaunsee High School | 16-25,15-25 | |
| | Wabunsee Tournament-Pool Play | |
| * | 28 | 5:00PM | Onaga | @ | Clifton-Clyde | 25-17,25-17 | |
| | Clifton-Clyde Tri: Onaga won 25-17, 25-17 | |
| * | | 5:00PM | Onaga | vs. | Linn | 25-18,22-25,24-26 | |
| | Clifton-Clyde Tri: Linn won 18-25, 25-22, 26-24 | |
| September |
| * | 4 | 5:00PM | Axtell | @ | Onaga | 16-25,17-25 | |
| | Onaga Quad: Onaga won 25-16, 25-17 | |
| * | | 5:00PM | Blue Valley | @ | Onaga | 15-25,17-25 | |
| | Onaga Quad: Onaga won 25-15, 25-17 | |
| * | | 5:00PM | Valley Heights | @ | Onaga | 25-14,25-14 | |
| | Onaga Quad: Vhts won 25-14, 25-14 | |
| | 8 | | Onaga | vs. | Frankfort | 24-26,26-24,25-20 | |
| | St. Xavier Tournament: Onaga won 24-26, 26-24, 25-20 | |
| | | | Wetmore | vs. | Onaga | 21-25,7-25 | |
| | St. Xavier Tournament: Onaga won 25-21, 25-7 | |
| | | | Burlingame High School | vs. | Onaga | 19-25,15-25 | |
| | St. Xavier Tournament: Championship: Onaga won 25-19, 25-15 | |
| | | | Burlingame High School | vs. | Onaga | 26-24,21-25,8-25 | |
| | St. Xavier Tournament: Onaga won 24-26, 25-21, 25-8 | |
| | | | St. Xavier High School | vs. | Onaga | 8-25,9-25 | |
| | St. Xavier Tournament: Onaga won 25-8, 25-9 | |
| | | | Kickapoo Nation | vs. | Onaga | 5-25,8-25 | |
| | St. Xavier Tournament: Onaga won 25-5, 25-8 | |
| * | 11 | 5:00PM | Onaga | @ | Frankfort | 23-25,18-25 | |
| | Frankfort Triangular: Ffort won 25-23, 25-18 | |
| | | 5:00PM | Onaga | vs. | Linn | 20-25,15-25 | |
| | Frankfort Triangular: Linn won 25-20, 25-15 | |
| * | 18 | 5:00PM | Onaga | @ | Hanover | 25-20,24-26,21-25 | |
| | Hanover Triangular: Hanover won 20-25, 26-24, 25-21 | |
| * | | 5:00PM | Washington County | vs. | Onaga | 25-16,25-19 | |
| | Hanover Triangular: WC won 25-16, 25-19 | |
| * | 25 | 5:00PM | Onaga | vs. | B&B | 13-25,25-22,25-22 | |
| | Wetmore Triangular: Onaga won 13-25, 25-22, 25-22 | |
| * | | 5:00PM | Onaga | @ | Wetmore | 25-3,25-12 | |
| | Wetmore Triangular: Onaga won 25-3, 25-12 | |
| | 29 | | Onaga | vs. | Wabaunsee High School | 20-25,15-25 | |
| | Onaga Invitational: Wabunsee won 25-20, 25-15 | |
| | | | Mission Valley High School | vs. | Onaga | 25-27,9-25 | |
| | Onaga Invitational: Onaga won 27-25, 25-9 | |
| | | | Atchison County | vs. | Onaga | 25-13,23-25,24-26 | |
| | Onaga Invitational: Onaga won 13-25, 25-23, 26-24 | |
| | | | Frankfort | vs. | Onaga | 25-21,17-25,15-25 | |
| | Onaga Invitational: Onaga won 21-25, 25-17, 25-15 | |
| | | | Blue Valley | vs. | Onaga | 13-25,18-25 | |
| | Onaga Invitational: Onaga won 25-13, 25-18 | |
| October |
| * | 2 | 5:00PM | Bern | @ | Onaga | 13-25,15-25 | |
| | Onaga Quad: Onaga won 25-13, 25-15 | |
| * | | 5:00PM | Centralia | @ | Onaga | 25-19,26-28,25-7 | |
| | Onaga Quad: Cent won 25-19, 26-28, 25-7 | |
| | | 5:00PM | Wetmore | @ | Onaga | 15-25,14-25 | |
| | Onaga Quad: Onaga won 25-15, 25-14 | |
| | 9 | 5:00PM | Onaga | @ | Axtell | 17-25,25-15,26-24 | |
| | Axtell Triangular: Onaga won 17-25, 25-15, 26-24 | |
| | | 5:00PM | Clifton-Clyde | vs. | Onaga | 21-25,19-25 | |
| | Axtell Triangular: Onaga won 25-21, 25-19 | |
| | 13 | | Onaga | vs. | Centralia | 18-25,9-25 | |
| | TVL Tourney: Semifinal: Cent won 25-18, 25-9 | |
| | | | Onaga | vs. | Wetmore | 25-11,25-13 | |
| | TVL Tourney: Onaga won 25-11, 25-13 | |
| | | | Onaga | vs. | Bern | 25-19,25-14 | |
| | TVL Tourney: Onaga won 25-19, 25-14 | |
| | | | Washington County | vs. | Onaga | 25-16,19-25,14-25 | |
| | TVL Tourney: Onaga won 16-25, 25-19, 25-14 | |
| | | | Valley Heights | vs. | Onaga | 25-11,25-20 | |
| | TVL Tourney: 3rd Place: Vhts won 25-11, 25-20 | |
| | 20 | | Onaga | vs. | Washington County | 20-25,25-18,21-25 | |
| | Sub-State at Valley Heights: WC won 25-20, 18-25, 25-21 | |
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