Ford Flex Fuel Economy (MPG)

Name: Ford Flex MPG & Fuel Economy
Creator: AutoSpecData
License: https://creativecommons.org/licenses/by/4.0/

What is the real-world gas mileage of a 2019 Ford Flex?

The 2019 Ford Flex gets up to 20 MPG combined (18 city / 25 highway) in EPA testing.

Latest model year (2019):

The Ford Flex gets up to 19 MPG combined (16 city / 23 highway) in the Auto (S6), 6 cyl, 3.5 L trim.

Verifiedfueleconomy.gov · Verified August 11, 2026

Overview MPG Engine Specs Fuel Cost Transmission Drivetrain Vehicle Class Maintenance Dimensions Curb Weight Safety

Ford Flex MPG — All Years

Year	Trim	Engine	Fuel	City (MPG)	Hwy (MPG)	Combined (MPG)
2019Config 1 of 3	Auto (S6), 6 cyl, 3.5 L	6 3.5L	Regular Gasoline	16	23	19
2019Config 2 of 3	Auto (S6), 6 cyl, 3.5 L	6 3.5L	Regular Gasoline	16	22	18
2019Config 3 of 3	Auto (S6), 6 cyl, 3.5 L	6 3.5L	Regular Gasoline	15	21	17
2018Config 1 of 3	Auto (S6), 6 cyl, 3.5 L	6 3.5L	Regular Gasoline	16	23	19
2018Config 2 of 3	Auto (S6), 6 cyl, 3.5 L	6 3.5L	Regular Gasoline	16	22	18
2018Config 3 of 3	Auto (S6), 6 cyl, 3.5 L	6 3.5L	Regular Gasoline	15	21	17
2017Config 1 of 3	Auto (S6), 6 cyl, 3.5 L	6 3.5L	Regular Gasoline	16	23	19
2017Config 2 of 3	Auto (S6), 6 cyl, 3.5 L	6 3.5L	Regular Gasoline	16	22	18
2017Config 3 of 3	Auto (S6), 6 cyl, 3.5 L	6 3.5L	Regular Gasoline	15	21	17
2016Config 1 of 3	Auto (S6), 6 cyl, 3.5 L	6 3.5L	Regular Gasoline	16	23	19
2016Config 2 of 3	Auto (S6), 6 cyl, 3.5 L	6 3.5L	Regular Gasoline	16	22	18
2016Config 3 of 3	Auto (S6), 6 cyl, 3.5 L	6 3.5L	Regular Gasoline	15	21	17
2015Config 1 of 3	Auto (S6), 6 cyl, 3.5 L	6 3.5L	Regular Gasoline	18	25	20
2015Config 2 of 3	Auto (S6), 6 cyl, 3.5 L	6 3.5L	Regular Gasoline	17	23	19
2015Config 3 of 3	Auto (S6), 6 cyl, 3.5 L	6 3.5L	Regular Gasoline	16	22	18

Data sourced from fueleconomy.gov (U.S. Department of Energy). MPG figures are EPA-tested. Fuel costs are estimates based on average fuel prices and 15,000 miles/year.

Ford Flex data analysis

How Ford Flex combined fuel economy varies

Across 15 configurations recorded for the 2015 through 2019 Ford Flex, combined fuel economy runs from 17 MPG to 20 MPG. The strongest figure belongs to the 2015 Ford Flex (Auto (S6), 6 cyl, 3.5 L) at 20 MPG, and the weakest to the 2019 car (Auto (S6), 6 cyl, 3.5 L) at 17 MPG — a spread of 18%. The narrow spread means any year of the Ford Flex in this table behaves much like the others, so you can shop on price, condition and mileage rather than chasing a particular model year.

What changed for 2019

Average combined fuel economy for the 2019 Ford Flex is 18 MPG, against 18 MPG for the 2018 car — it held flat. A carry-over year like this usually means no powertrain or structural change, so an older example is the cheaper way into the same specification.

How to read this Ford Flex data

This page lists every 2015 through 2019 Ford Flex record we hold for this measurement — 15 rows in total, one per configuration and model year rather than a single headline figure. Figures are published as the source agency records them: we do not round, average or interpolate missing years, and a year that is absent from the table is a year with no published measurement rather than a zero. Where a manufacturer offered several drivetrains or body styles in the same year, each appears on its own row, because those variants rarely share the same numbers.

Configurations behind these Ford Flex numbers

The 2015 through 2019 Ford Flex entries here span 5 model years of published measurements for this figure. 2019 is the busiest model year in the record with 3 separate measured configurations, which is why a single quoted combined fuel economy figure for that year is rarely the one that matches the car in front of you. Match the row to the exact drivetrain, body style and engine on the window sticker or VIN before relying on the number, and use the comparison links below to see how those same configurations line up against rival models.

Where these Ford Flex figures come from

Every value on this page is loaded from federal open data — EPA fuel economy submissions, NHTSA vehicle and crash-test records, and manufacturer specification filings — rather than dealer listings or copied editorial content. The Ford Flex record refreshes as the agencies publish, which typically means new model-year rows appear in the autumn and crash-test results follow through the model year as vehicles are tested. Because certification data is filed per configuration, treat any single headline number for this vehicle with caution: the figure that applies to a specific car depends on its engine, drivetrain, body style and model year, all of which are listed separately above. If a number here disagrees with a brochure, the brochure is usually quoting the best available configuration rather than the one being sold.

Official Factory Specs vs. AutoSpecData Expert Benchmarks

The EPA highway loop never holds interstate speed. Here is what the same engine does when you sit on the cruise control.

Cruise speed	EPA highway spec	AutoSpecData adjusted MPG	Fuel you lose
60 mph	25 MPG	25 MPG	0%
65 mph	25 MPG	22.8 MPG	9%
70 mph	25 MPG	20.9 MPG	17%
75 mph	25 MPG	19.1 MPG	24%
80 mph	25 MPG	17.5 MPG	30%

Our Real-World Speed MPG Adjuster re-scales the Ford Flex EPA highway result with a quadratic drag term (mpg = hwy ÷ (1 + k·(v² − 60²)/60²), k = 0.55 for trucks, SUVs and vans, 0.42 for cars). Wind, roof racks, and a heavy right foot make it worse, never better.

Frequently Asked Questions About Flex MPG

What is the MPG of the Ford Flex?

The Ford Flex gets up to 20 MPG combined (18 city / 25 highway) in the 2019 model year. Fuel economy varies by engine and trim — see the full table above for details.

Which Ford Flex trim has the best fuel economy?

The Auto (S6), 6 cyl, 3.5 L trim offers the best combined fuel economy at 20 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.