How to Say "they fly" in Spanish
The Spanish word for “they fly” is “vuelan” — A1 level. This is a very common word in everyday Spanish.
English → SpanishA1
verbA1
moving through the air

Examples
Las aves vuelan hacia el sur en invierno.
The birds fly south in the winter.
Los aviones vuelan muy alto.
The planes fly very high.
The 'O' to 'UE' Swap
The word 'vuelan' comes from 'volar.' Notice how the 'o' changes to 'ue' when you say 'they fly'—this happens in the present whenever the stress is on the middle of the word!
Vuelan vs. Vuelven
Mistake: “Using 'vuelven' to mean 'flying.'”
Correction: Say 'vuelan' to fly; 'vuelven' means they are returning or coming back.
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