vitani is older than kovu and kiara

Kovu would have to be older than kiara if he was born when scar was
alive & I think vitani & kovu are the same age

Well, it is unknown if Vitani is older than Kiara, but yes! Vitani is
older than Kovu. How do I know this? Zira said, "Kovu was the last
born before you exiled us."

It really didn't say...

Vitani is older than Kovu. And in a deleted scene Vitani
says they have seen Simba's new cub.

i'm hyper! hope my answers help

yes Vitani is older than Kovu... Zira was telling Simba that
Kovu was the last born before he exiled them to the
outlands... and if i had to guess i would say yes that
Vitani is also older than Kiara becauce after Scar killed
Mufasa, Simba got mad and banished the outsiders and then at
the end of the movie he had Kiara! also i saw this cut clip with Vitani saying she saw Simba's new girl cub!hope this
helps!

Vitani is probably about the same age as Kovu maybe just a
few minutes older or younger but they look the same age. I
say the same thing about Kiara but then again who is to know
because they are separated from the Outsiders and the Pride
lands.

vitani is older than kiara because of the cutscene. i think
she's older than kovu too because she's larger and if she
was younger then it probably would have been kovu rushing to
find out about simba's cub.
lastly, zira says that
kovu was the last born before being exiled to the outlands
which probably meant for the whole pride because we never
see any other cubs and we never hear about any other cubs.

it makes the most sense to me if Kovu and Vitani are the
same age, same litter, though Vitani seems older to me. She
has the thin build of an older outsider, but it could also
be because Zira does not give her full meals, and only Kovu
is well fed.