Let
f
:
(
X
,
B
)
→
Z
f:(X,B)\to Z
be a threefold extremal dlt flipping contraction defined over an algebraically closed field of characteristic
p
>
5
p>5
, such that the coefficients of
{
B
}
\{ B\}
are in the standard set
{
1
−
1
n
|
n
∈
N
}
\{ 1-\frac 1n|n\in \mathbb N\}
, then the flip of
f
f
exists. As a consequence, we prove the existence of minimal models for any projective
Q
{\mathbb Q}
-factorial terminal variety
X
X
with pseudo-effective canonical divisor
K
X
K_X
.