Chick-fil-A's drive-thru service is among the slowest in a new survey - here's how 10 major chains rank

• Dunkin' has the fastest drive-thru wait times and Chick-fil-A has the slowest, according to a new study by QSR Magazine.
• The study analyzed wait times from drive-thru speakers to order windows at 10 major fast-food chains.
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Fast-food drive-thru service is getting slower.

Customers spent an average four minutes and 25 seconds waiting in drive-thru lines in 2019, according to a new study from QSR Magazine. That's about 20 seconds longer than drive-thru wait times in 2018.

The study analyzed wait times from drive-thru speakers to order windows at 10 major fast-food chains.

Here's how the chains ranked from slowest to fastest.