Goodbye
Informal and very common, like saying 'Bye!'. Use with friends, family, and in casual situations.
Literally 'We'll see each other.' A friendly and common way to say 'See you.'
Means 'See you later.' It's neutral and can be used in both formal and informal contexts.
Specific for when you will see the person the next day. It means 'See you tomorrow.'
Goodbye, ma'am. Thanks for everything.
Bye, friends! See you on Monday.
I'm going home now. See you later!
Good night, dad. See you tomorrow.
The taxi is here. See you!
'Chao' is extremely common for casual goodbyes, often more so than 'adiós'. 'Adiós' can sometimes sound a bit formal or final.
'Adiós' and 'nos vemos' are very common. 'Hasta luego' is also frequently used. You'll hear 'chao', but it's less frequent than in South America.
'Chao' is the most common goodbye by far, used in almost every situation. You will often hear it doubled as 'chao, chao' or with 'pues' as in 'chao, pues'.
The standard is 'chau' (spelled with a 'u'). Using 'adiós' can imply that you don't expect to see the person again for a very long time.
'Hasta luego' is the most common, all-purpose goodbye. 'Adiós' is also used, but like in Argentina, it can feel more permanent. 'Chao' is also common and understood.
Using 'adiós' for temporary goodbyes. — 'Adiós' can sound very final, like you won't see the person again. If you'll see them later the same day or week, it's more natural to use 'nos vemos' or 'hasta luego'.
Pronouncing 'adiós' with the stress on the first syllable. — The stress is on the 'o', not the 'a'. It's 'ah-DYOHS', not 'AH-dee-ohs'. This is a common pronunciation error for English speakers.
Thinking 'hasta la vista' is a common phrase. — This phrase was made famous by the movie 'The Terminator' but is almost never used in real life. Stick to 'hasta luego' or 'nos vemos'.