Save the Date across the sea?

I would still send the save the dates just because if they do decide to come, the VISA process can take awhile. I have an aunt who lives in the Ukraine, and she is actually coming for the wedding. She is coming for a month and visiting with multiple relatives. Sometimes a wedding can be a good excuse to finally make a trip if a relative has been thinking about wanting to see people.

Witaj
I'm in a similar boat! Born and raised here, but my parents are from Poland (with the rest of my family there). My fiance's family is mostly here but there is a good amount in Greece as well.
We didn't send save the dates overseas (we talk to many cousins/family frequently so they knew our wedding date regardless, and anyone who was serious about it then talked to us!) If you talk similarly/frequently and have a close relationship too I think its fine to let them know over the phone/online - we had a few family members come here before and they are coming again! You never know who might surprise you

We are sending invitations as a courtesy (we've always received them from abroad as well) and will be adding a personal note saying we know they probably will not make it but we'll be thinking of them or celebrate with them some day in the future. End of day, it really depends how close you still are and such.

Good luck!

I sent save the dates to our family oversees just so they feel included. They still wanted invites too, just to keep.

The people who knew they couldn't attend my wedding still wanted a save the date and an invite.

I think it's good to send them incase. Some of your family might just enjoy being thought of.

I think it would be nice for you to send it anyway. Many people love a little token, especially if they are unable to go. Lets them know too that you were thinking of them and that you wanted them there. And who knows, maybe they may surprise you.. but they gotta know first!