DriveCosts

Gas prices by state

Washington Gas Prices

Estimated current fuel and electricity prices for Washington, plus monthly and annual driving cost estimates for a typical commuter.

Expensive statevs US avg $3.29/gal · +$0.91
  • Updated for 2026
  • US avg fuel prices
  • EV rates vary by state
  • Transparent assumptions

Regular

$4.20

per gallon

Premium

$4.75

per gallon

Diesel

$4.10

per gallon

Electricity

$0.11

per kWh

Estimated driving cost in Washington

Monthly (1,000 mi · 27 MPG)

$156

Annual (12,000 mi)

$1867

EV monthly (1,000 mi · 3.5 mi/kWh)

$31

Key takeaway

At Washington prices, switching from gas to EV saves roughly $124/month on a typical 1,000-mile driving month — about $1490/year.

Switch to gas, premium or EV in the fuel cost calculator or estimate a full drive with the trip cost calculator.

How Washington compares

Regular gas, $/gal — this state vs cheapest and priciest in the US.

Mississippi· cheapest$2.80
Arkansas· cheapest$2.85
Texas· cheapest$2.85
Washington (this state)$4.20
US average$3.29
California· most expensive$4.65
Hawaii· most expensive$4.55
Washington· most expensive$4.20
Monthly fuel cost vs US avg: +$34

Cheapest states for gas

Most expensive states

Nearby states

Oregon$4.05Idaho$3.45Montana$3.30Nevada$4.05Utah$3.45Wyoming$3.20

Commuting in Washington

Estimate commute fuel cost for a typical driver in these cities.

SeattleTacomaSpokaneBellingham

Popular Washington road trips

Salt Lake City → Spokane649 miProvo → Spokane694 miDenver → Spokane975 miLas Vegas → Tacoma1006 miLas Vegas → Seattle1029 miDenver → Tacoma1196 miDenver → Seattle1203 miDenver → Bellingham1254 mi

Best road trips in Washington → · All Washington routes →

Curated picks

Popular Drives From Washington

Short-distance Washington routes at the state's $4.20/gal average.

All routes

Seattle, WA → Spokane, WA

269 mi · 4.3 h · ~$40 gas

Seattle, WA → Bend, OR

295 mi · 4.8 h · ~$44 gas

Seattle, WA → Eugene, OR

293 mi · 4.7 h · ~$44 gas

How we estimate Washington prices

Per-gallon prices
State-level estimates for regular, premium and diesel calibrated to recent averages.
Electricity rate
Residential per-kWh rate used for EV charging cost comparisons.
Monthly cost formula
(monthly miles ÷ MPG) × $/gal — defaults assume ~1,000 miles/month.
Local variation
City prices can swing ±$0.30/gal from state averages; taxes and refinery proximity dominate.

Sources & assumptions

  • EPA fuel economy data — City / highway / combined MPG and MPGe baselines.
  • U.S. Department of Energy (fueleconomy.gov) — Vehicle efficiency and EV range references.
  • AAA gas price trends — Recent national and regional retail fuel averages.
  • EIA electricity rates — Average residential per-kWh prices used for EV charging.

We summarize publicly available data — no scraping, no external API calls. Figures are calibrated periodically; use the calculators above for your exact inputs.

FAQ

Why are Washington gas prices higher than the national average?

Prices reflect local fuel taxes, refining capacity, and transport costs. Washington currently averages about $4.20 per gallon of regular.

How much does it cost to drive 1,000 miles in Washington?

At $4.20/gal and 27 MPG, 1,000 miles costs about $156 in fuel. Use the trip calculator for exact estimates.

Is it cheaper to drive an EV in Washington?

At $0.11/kWh and 3.5 mi/kWh, 1,000 miles costs roughly $31 — typically cheaper versus gas.

How often are these prices updated?

These are rolling estimates for editorial use. Verify current prices at a local station or via AAA before fueling up.