Many travelers are upset about the high prices of food at airports.

A post on the internet about a $20 avocado toast at an airport made many people angry.

The $19.64 breakfast was supposed to have many ingredients, but it did not look good. Many people commented on this.

Airports are very crowded.

Chef Andrew Gruel looked at pictures of the avocado toast and was not impressed.

Gruel said the avocado toast was probably just mashed avocado on toast. He said it did not look good.

A traveler posted a picture of a $20 avocado toast on the internet.

Gruel said he is not surprised by the high prices of food at airports.

Airports are very busy and noisy.

Gruel thinks the quality of food at airports is getting worse as prices get higher.

Gruel said airports only have pre-packaged food now.

Gruel said the quality of food at airports is getting worse.

Gruel said one company makes all the sandwiches and wraps at airports.

Gruel said the food at airports is overpriced and not good.

Travelers make mistakes when eating on planes.

Gruel said most food at airports is not made from scratch. But he said there is some good food.

A travel expert said the problem of high food prices at airports is bigger than just one expensive breakfast.

Airports have high rents and strict security rules, which makes food more expensive.

Airports have high rents and limited space, which makes food more expensive. Experts said this is why food prices are high.

There was a problem on a plane with a sick co-pilot.

Gruel said some airports say they have 'street prices', but it's not clear what that means.

Gruel said airports do not say which street they are comparing their prices to.

Airports say they have 'street prices', but people are not sure what that means.

Some airports allow restaurants to charge 15% more than prices outside the airport.

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Gruel said airport food is more expensive and not as good.

The $20 avocado toast is not the only expensive food at airports.

A burger at an airport in New York costs $34.

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A breakfast at an airport in Los Angeles costs $21.30.

Gruel said airports make money by charging a lot for water and other simple things.

The post about the avocado toast made travelers share their own stories about high prices at airports.

Travelers shared their own stories about high prices at airports.

One person said airport food prices are out of control.

Gruel said even a bottle of water costs $5 or $6 at airports.

One person joked about paying $36 for a breakfast burrito.

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Gruel said some airport lounges have good food, but it's not worth paying for.

Gruel said the food in airport lounges is often just sitting out and not fresh.

Some airport lounges have good food, but an expert said it's not worth paying for.

Gruel said it's better to eat before going to the airport or bring your own food.

Gruel said to look for sandwiches at airports.

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Gruel said he would not pay $25 for pizza, but he has had good sandwiches at airports.

Gruel said one airport restaurant in Chicago makes a good sandwich, but it's $25.

Kelly McGreal works with the lifestyle team at Fox News Digital.