Time to bring in the Domer, who has arranged and taken flights for my daughter, son and me too many times to count. The most common way to get into South Bend by air are via connections, most notably O'Hare. There is a puddle (actually Lake Michigan) jumper between O'Hare and South Bend that is exceedingly short in time and wipes out having to drive around Chicago and through Indiana. There are also other connections (Detroit) to South Bend International (the flights to Canada upgrade what is a small, but efficient airport to "international" status).
(Many students also take a bus that picks up travelers from the Chicago airports and drives to South Bend, dropping students off on campus. I highly doubt athletes need to do this....)
For NY-metro area types, there are a couple of directs, but that wouldn't help the Prince family. That said, South Bend is not easy to get to, but that's part of the deal.
At this point, at least in regards to Ms. Prince, there have been absolutely crickets in regards to her visiting ND, so that could be a moot point. The summer session started this week (returning players, plus frosh Sam Brunelle and Anaya Peoples are on campus), so this would be an optimal time to come (if she does). As Coco pointed out, Prince played on international teams with Peoples last summer and with Abby Prohaska in 2016, so there are some connections. She's also in contact with ND prospect Deja Kelly.
Stay tuned....take the puddle jumper..