Formal:
* Velkommen: This is the most common and formal way to say "welcome."
* Velkommen til: This is the more literal translation of "welcome to."
Informal:
* Velkommen til: You can use the formal "Velkommen til" informally as well.
* Hils på: This translates to "say hello to" and can be used informally to welcome someone to a place or group.
Specific situations:
* Velkommen hjem: This means "welcome home."
* Velkommen tilbage: This means "welcome back."
* Velkommen ombord: This means "welcome aboard."
Remember that Danish pronunciation is different from English. The "v" in "velkommen" is pronounced like a "v" in English, but the "k" is pronounced like a "g" in "gem".