Yes! Attending the Nuptial Mass satisfies the Sunday Obligation to Worship for Catholics (canon 1248 §1).

Please see the travel section for detailed information.

-Use Google Flights, or a booking engine like SkyScanner or Momondo. -Use the Google Flights explore tab to look at your origin destination going to other spots in Europe. If you're planning on extending your time in Europe, this is a great option to find another city it may be significantly cheaper to fly in and out of, then book a flight from there to Vienna -See more in this guide: https://www.going.com/guides/how-to-find-cheap-flights -Apparently the Olympics are in Paris from July 26th to August 11th. It was rude of them to schedule the Olympics at the same time as our wedding, but alas. It is probably best to avoid Paris's Charles De Gaulle airport if you can.