Hi hp. As Rob said Utila is a great place for beginner divers. The sea here is like a bath, 28-30C / 82-86F right now, calm, a great place for your wife to build her confidence in diving. There have also been recent whaleshark and dolphin sightings even out of season and every dive is as exciting as the last with the chance to see turtles, spotted eagle rays, sting rays, nurse shark and much more.
If you are flying into Roatan and want to come direct to Utila there is a daily Catamaran ferry run by Captain Vern for $55pp. You'll be able to find him easily once you arrive in Roatan. Just ask in any hotel or dive shop. Otherwise you can take the ferry from Roatan to La Ceiba then another ferry to Utila for about $50pp.
If you're wife is interested in doing the advanced course we at Utila Watersports are the only dive shop on the island to offer 4 free fun dives with every course so that's 9 dives instead of 7 for the same price. We offer the extra dives because we believe that improving our divers confidence in the water is essential to a great diving experience.
If you're interested in finding out more about the island and diving then google Utila Watersports and drop us a message. We'll be happy to hear from you.
The Team
Utila Watersports