The correct spelling of the word "are air" is /ɑːr ɛər/. The first syllable "are" is pronounced with the long vowel sound /ɑː/, which is represented by the letter combination "ar". The second syllable "air" is pronounced with the diphthong /ɛər/, which is represented by the letter combination "ai" followed by the letter "r". It is important to use the correct spelling and pronunciation of words to ensure clear communication and understanding.