Gas Prices Along Interstate 635

Updated April 5, 2026 — Prices updated regularly from EIA data

Route • 1 states

About Interstate 635

The LBJ Freeway running 37 miles through the Dallas-Fort Worth metroplex in Texas. As with all DFW highways, I-635 benefits from Texas's low fuel taxes and proximity to Gulf Coast refineries, offering very competitive prices.

Avg. Price Along Route
$2.74
Est. Trip Fuel Cost
$109
Price Range
$2.69–$2.83

Gas Prices at Each Stop

Fueling Tips for Interstate 635

Liberty Freedom Badge

Making the Most of Every Road Trip

Smart travelers combine fuel savings with great American collectibles. Limited offers available for road trip enthusiasts.

Get Your Badge →

Frequently Asked Questions

A 2-mile detour to save 20 cents per gallon on a 15-gallon fill-up saves $3. With a car getting 28 MPG, the detour uses 0.14 gallons. Detours above 3-4 miles for savings under 20 cents per gallon are generally not worthwhile.
The cheapest gas along Interstate 635 is generally found in Texas, where lower fuel taxes and proximity to refineries or pipelines keep prices down. Avoid fueling at highway-exit stations in Texas, where tourist premiums push prices 15-25 cents above the best nearby rates.
For a trip along Interstate 635, a vehicle averaging 25 MPG would use approximately 1 gallon per 25 miles. At current average prices along the route, budget approximately {perMileCost} cents per mile for fuel. Plan fill-ups in lower-price states whenever possible.
Yes — consistently. Highway-exit gas stations charge 10-25 cents more per gallon than stations just 1-2 miles off the interstate. Whenever possible, exit the highway and drive to a commercial area for competitively priced fuel.
Gas prices along Interstate 635 vary significantly by state due to different fuel tax rates. States like Texas (20 cents/gallon), Missouri (17 cents), and Oklahoma (20 cents) consistently offer the most affordable fuel. Pennsylvania (59 cents) and California (67 cents) are among the most expensive.

Related Gas Price Pages

Gas Prices Along Interstate 5Gas Prices Along Interstate 10Gas Prices Along Interstate 15Gas Prices Along Interstate 20Gas Prices Along Interstate 25Gas Prices Along Interstate 35Gas Prices Along Interstate 40Gas Prices Along Interstate 55Gas Prices Along Interstate 65Gas Prices Along Interstate 70Gas Prices Along Interstate 75Gas Prices Along Interstate 80Gas Prices Along Interstate 85Gas Prices Along Interstate 90Gas Prices Along Interstate 95Gas Prices Along Interstate 4Gas Prices Along Interstate 8Gas Prices Along Interstate 12Gas Prices Along Interstate 24Gas Prices Along Interstate 26Gas Prices Along Interstate 30Gas Prices Along Interstate 44Gas Prices Along Interstate 45Gas Prices Along Interstate 64Gas Prices Along Interstate 66Gas Prices Along Interstate 68Gas Prices Along Interstate 69Gas Prices Along Interstate 71Gas Prices Along Interstate 76Gas Prices Along Interstate 77Gas Prices Along Interstate 78Gas Prices Along Interstate 81Gas Prices Along Interstate 84Gas Prices Along Interstate 87Gas Prices Along Interstate 88Gas Prices Along Interstate 91Gas Prices Along Interstate 93Gas Prices Along Interstate 94Gas Prices Along Interstate 96Gas Prices Along Interstate 97Gas Prices Along Interstate 99Gas Prices Along Interstate 278Gas Prices Along Interstate 376Gas Prices Along Interstate 390Gas Prices Along Interstate 405Gas Prices Along Interstate 495Gas Prices Along Interstate 285Gas Prices Along Interstate 610Gas Prices Along Interstate 820Compare All 50 StatesRoad Trip Calculator