Each wireless point-to-point hop will add about 10ms.
root@OpenWrt:~# ping -s1500 1.1.1.1
PING 1.1.1.1 (1.1.1.1): 1500 data bytes
1508 bytes from 1.1.1.1: seq=0 ttl=61 time=8.467 ms
1508 bytes from 1.1.1.1: seq=1 ttl=61 time=5.832 ms
1508 bytes from 1.1.1.1: seq=2 ttl=61 time=6.458 ms