a Flute does not have a reed so it's neither a single or double reed instrument.
I think you are referring to the Bb clarinet which is single but there are acually 3 different types of clarinets. Bb=single Oboe=double Alto=single
The flute is generally classified as a woodwind, although it is distinct in that it is the only major woodwind that does not have a reed. Other woodwinds include the oboe (double reed), clarinet (single reed) and saxophone (single reed).
flute has no reed
flute
You did not include the list to chose from
Double reed.
double reed
The single-reed and double-reed, that's if you're talking about woodwind instruments.
Along with every clarinet, the bass clarinet is a single reed instrument.
single reed and double reed
Woodwind instruments are typically categorized into three main groups: single-reed instruments, double-reed instruments, and flutes. Single-reed instruments, like the clarinet and saxophone, use a single reed to produce sound. Double-reed instruments, such as the oboe and bassoon, utilize two reeds that vibrate against each other. Flutes, including the concert flute, produce sound by blowing across an opening, without the use of reeds.
Cor anglais, or the English horn, is a double-reed instrument. It's a larger version of the oboe.