SUX-DUB is running around $1200 for your dates in June (not on Skyteam, mind you). You could also fly ex-ORD for about $850 (nonstop, again not Skyteam). Your call if the MQMs are worth a potentially higher fare/distant airport/multiple connections, but if I was statusless and going for a 2-3 day trip, I'd just do the cheapest/fastest option.