Like Subway's $5 footlong, affordable fast food may soon be a thing of the past.

The average price of fast food in larger U.S. cities is now in the double digits, with the typical meal costing $11.56, according to a new report from LendingTree. Prices are highest in San Francisco, where the average fast-food meal costs $13.88, followed by Seattle at $13.48. Columbus, Ohio, has the most affordable fast food, but meals still came to $10.01 on average.

Fast food has long been considered a more economical, if not more healthful, way to eat. Whether it's Wendy's "Biggie Bag" or McDonald's "McValue" menu, most major fast-food chains offer some sort of meal deal for under $10. But as costs rise and inflation pinches Americans' wallets, the cost of burgers, fries and chicken nuggets may be slipping out of reach for many consumers.

A FinanceBuzz analysis found last year that average fast-food prices have risen between 39% and 100% over the last decade. For example, a McDouble sandwich that cost $1.19 in 2014 would easily cost more than $3 in 2024, the personal finance site found.

Average cost of a flagship fast food meal

Across the 50 largest metros in the U.S., the average cost of a flagship meal is about $11.56. It's highest in San Francisco at $13.88 and lowest in Columbus, Ohio at $10.01. Click on or hover over an icon below for more information.

Thirty-nine percent of Americans expect to spend less on dining given heightened uncertainty about the economy, according to a recent Bankrate survey.

According to McDonald's most recent earnings report, the company experienced a 3.6% drop in sales the first quarter, with executives citing tariffs as the reason behind the slower foot traffic.

"Heightened anxiety" about the economy is weighing on lower- and middle-income Americans, McDonald's CEO Chris Kempczinski said in a May 1 earnings call.

Among the consumers who may be struggling with the cost of fast food — the low-income employees who make it. The average hourly wage for fast-food workers is $15.07, according to LendingTree. That means it takes workers more than two times longer than someone on an average wage in the U.S. to earn enough to afford a typical fast-food meal, while factoring in the cost of other living expenses.

"No one has ever expected to get rich off of fast-food wages, but the fact that these workers can't even expect a livable wage is troubling," LendingTree chief consumer finance analyst Matt Schulz said in the report.

LendingTree found that a fast-food worker who purchased three meals a day from their employer, seven days a week, would end up spending 40% of their salary on average — leaving them with just 60% of their paycheck to live on. (CBS News)