Start with the 'eh' vowel mouth position. Pull the tongue back and up while flaring the lips for the 'r'.
How to pronounce airplanes in American English
Americans pronounce airplanes as AIR-playnz (/ˈɛrˌpleɪnz/). Stress falls on the first syllable — keep everything else short and quick. You'll hear it in sentences like "He builds detailed model airplanes in his spare time".
Now you try.
Record yourself saying "airplanes" and play it back. The mic stays on your device — nothing's uploaded.
Every sound in "airplanes".
2 syllables, 6 sounds. Tap a syllable to jump to its row, then explore each sound's mouth shape and how it's made.
Press your lips together to stop the air, then release. No vocal cord vibration.

Place the tip of your tongue against the alveolar ridge just behind your top front teeth, the same contact point as /t/, /d/, and /n/. The difference is what happens to the air: for /l/, you let it flow continuously around the <em>sides</em> of the tongue (that's why /l/ is called a lateral). Turn your voice on the whole time. Lips stay relaxed, no rounding or flaring. For the Dark L variant at the end of a syllable, also pull the back of the tongue up and back toward the soft palate.

Start with your jaw slightly open and the front of your tongue forward and slightly up. Glide upward, your jaw closes a little more and your tongue arches higher toward the roof of the mouth.
Touch the tip or front edge of your tongue to the roof of your mouth behind your teeth. Air flows through your nose.

Same position as S, but add vocal cord vibration. Feel the buzz.

Looking for a different word or sentence?
Common pronunciation mistakes in American English.
The textbook way isn't wrong — it's just not how anyone actually says it.
Stressing the wrong syllable.
Stress falls on the first syllable, not the others. Stretch AIR — keep everything else short and quick.
Pronouncing the "R" too clearly.
Americans use a relaxed retroflex R — the tongue curls back rather than rolling. The R is one continuous sound with the vowel before it, not two separate sounds.

