#7 2019 Kia Optima Plug-In Hybrid
103 MPGe | Est Annual Fuel Cost: $800 | U.S. News Overall Score: 8.4/10 (2018) | $35,290. The 2019 Kia Optima Plug-In Hybrid achieves 103 MPGe, according to the EPA. Its 29-mile electric-only range is one of the longest for a midsize hybrid sedan. The Optima Plug-In hybrid is powered by a 2.0-liter four-cylinder engine and electric motor making 202 horsepower.
#6 2018 Toyota Prius Eco
56 mpg | Est Annual Fuel Cost: $700 | U.S. News Overall Score: 8.5/10 | $23,475. The Toyota Prius has a long-standing reputation as a leader among eco-friendly vehicles. The 2018 model is certainly no exception, returning an estimated 58 mpg in the city and 53 mpg on the highway in the Eco trim.
#5 2019 Hyundai Ioniq Blue
58 mpg | Est Annual Fuel Cost: $700 | U.S. News Overall Score: 8.4/10 | $22,400. While the Ioniq plug-in model uses a bit less fuel, the 2019 Hyundai Ioniq Hybrid Blue still manages to land among the top five fuel-sipping sedans. It gets up to 57 mpg in the city and 59 mpg on the highway, according to the EPA.
#4 2019 Chevrolet Volt
106 MPGe | Est Annual Fuel Cost: $700 | U.S. News Overall Score: 8.4/10 (2018) | $33,520. The 2019 Chevrolet Volt just misses the podium for sedans with the best gas mileage. It has a rating of 106 MPGe, based on EPA estimates. According to Chevy, the 2019 Volt can travel up to 53 miles on a fully charged battery.
#3 2018 Honda Clarity
110 MPGe | Est Annual Fuel Cost: $700 | U.S. News Overall Score: 8.1/10 | $33,400. Honda introduced the Clarity plug-in hybrid for the 2018 model year. This soft-riding sedan has a 110 MPGe rating when in all-electric mode and 42 mpg combined city/highway when the gas engine joins in. It has an exceptional 47-mile range using solely electric power.
#2 2019 Hyundai Ioniq Plug-in
119 MPGe | Est Annual Fuel Cost: $650 | U.S. News Overall Score: 8.4/10 | $25,350. The 2019 Hyundai Ioniq Plug-in Hybrid earns the second spot for most fuel-efficient sedans. It has a fuel economy rating of 119 MPGe, as well as an outstanding 29-mile range using electric power alone.
#1 2018 Toyota Prius Prime
133 MPGe | Est Annual Fuel Cost: $600 | USN Overall Score: 8.3/10 | $27,300. The 2018 Toyota Prius Prime, a compact plug-in hybrid, returns some of the best gas mileage numbers across the market. It gets up to 133 MPGe using both gas and electric power, and it has a 25-mile electric range.