“喜气洋洋”常见的英文表达有 “beaming with joy” 或 “in high spirits and full of festivity” 。
“beaming with joy” 强调脸上洋溢着喜悦的神情，突出那种由内而外散发出来的开心状态，与“喜气洋洋”所传达的充满喜悦、欢快的感觉较为契合。例如：The whole family was beaming with joy during the Spring Festival.（春节期间，全家都喜气洋洋的 。）
“in high spirits and full of festivity” 更全面地涵盖了精神振奋且充满节日氛围的意思，既体现了喜悦的精神状态，又点明了喜庆的场合氛围。例如：The streets were decorated beautifully, and people were in high spirits and full of festivity.（街道被装饰得十分漂亮，人们喜气洋洋 。 ）