@KoleH 

First, try to modify the wireless settings by changing the channel and width to different values and test to see if that improves.

If not, wire your computer directly to the router to see if you still see the high pings.

Test other computers or even smartphones to see if you still see the ping spikes.

@Tony 

Tried messing with those settings you told me to change, none of it helped. This house has no ethernet wall ports downstairs. Every computer and phone is also having this issue. My entire family is affected.

Ok after further inspection, it's not the router. It's actually happening on both our routers.

@KoleH 

If that is the case, I would focus on the modem and the internet connection. There may be some unstable signal or something going on.

If they try to insist on the modem and the internet is good, bring up it happens on two different routers.

In the meantime, try swapping the Ethernet cable from the modem to the router, it may be just a bad cable.