The 2018 OFC Champions League knockout stage was played from 7 April to 20 May 2018.[1] A total of eight teams competed in the knockout stage to decide the champions of the 2018 OFC Champions League.
The winners and runners-up of each of the four groups in the group stage advanced to the quarter-finals.
| Group | width=200 | Winners | width=200 | Runners-up |
|---|---|---|---|---|
| A | Nalkutan |  Toti City | ||
| B | Dragon | Solomon Warriors | ||
| C |  Auckland City | Lautoka | ||
| D | Team Wellington | Marist |
The bracket was determined as follows:
| Round | Matchups | |
|---|---|---|
| Quarter-finals | (Group winners host match, matchups decided by draw, teams from same group cannot play each other)
| |
| Semi-finals | (Matchups and order of legs decided by draw, involving winners QF1, QF2, QF3, QF4)
| |
| Final | (Order of legs decided by draw)
|
The schedule of each round was as follows.[4] [1]
| Round | First leg | Second leg | |
|---|---|---|---|
| Quarter-finals | 7–8 April 2018 | ||
| Semi-finals | 22 April 2018 | 29 April 2018 | |
| Final | 13 May 2018 | 20 May 2018 | |
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Lautoka won 2–1 on aggregate.----2–2 on aggregate. Team Wellington won on away goals.
See main article: article and 2018 OFC Champions League Final. In the final, the two semi-final winners played each other, with the order of legs decided by draw.Team Wellington won 10–3 on aggregate.