DriveCosts

Road trip cost

How Much Does It Cost to Drive From Denver to Billings?

At 535 miles and roughly 8 hr 36 min of driving, the route from Denver, CO to Billings, MT is a long-haul trip. Budget for multiple fuel stops, food, and possibly an overnight stay — gas alone can run well over a hundred dollars depending on your vehicle.

Long-haulLong haul
  • Updated for 2026
  • US avg fuel prices
  • EPA-style MPG
  • EV rates vary by state
  • US units
Distance

535 mi

Driving time

8 hr 36 min

Fuel stops

1

EV charges

2

Route overview535 mi

1 suggested fuel stop

Key takeaway

Plan on about $66 in gas one-way in a 28 MPG sedan, with 1 fuel stop and roughly 8 hr 36 min behind the wheel.

Drive intensity

Long-haul

Doable in a single day.

Estimate your trip cost

Pre-filled with the Denver → Billings distance.

miles
mpg
$/gal

Estimated Trip Cost

$0.00

Per Person

$0.00

Gallons

0.00gal

Total miles: 535 (one way).

How we estimate this trip

Distance
Great-circle distance between city centers × 1.18 road factor, rounded to whole miles.
Fuel cost formula
(miles ÷ MPG) × price per gallon, computed one-way unless noted.
Gas price assumption
Recent US average retail regular gas (AAA-style baseline).
EV charging assumption
Combined MPGe with average US residential electricity rate.
Tolls & weather
Not included — add manually for I-95, I-90 and mountain routes.
Driving time
Estimated at typical highway average speeds; excludes long breaks.

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.

Fuel cost by vehicle type

Estimated one-way fuel cost at $3.45/gal (US average). Adjust for your local price.

Compact car· 35 MPG · 15.3 gal$52.74
Sedan· 28 MPG · 19.1 gal$65.92
SUV· 22 MPG · 24.3 gal$83.90
Pickup truck· 18 MPG · 29.7 gal$102.54

Cost at different gas prices

Assuming a 28 MPG sedan over the 535-mile route.

Gas at $3.15/gal

$60.19

one way · ~19.1 gal

Gas at $3.45/gal

$65.92

one way · ~19.1 gal

Gas at $3.85/gal

$73.56

one way · ~19.1 gal

Fuel & charging stops

1 fuel stop one-way

A typical 28 MPG sedan with a 12.5-gallon tank covers about 350 miles per fill-up. Plan 1 stop along the way and fuel up before any remote stretches.

2 DC fast-charges for most EVs

Assuming a realistic 230-mile highway range, plan 2 DC fast-charging stops. Tesla Superchargers and Electrify America have strong coverage on most US corridors.

Route personality

Long-distance interstate driveScenic mountain driveOvernight-friendly

Mountain West driving context

  • Mountain passes can require chains or AWD from November through April — check CDOT/UDOT before departure.
  • Elevation gain reduces gas MPG and EV range by 10–20% on climbs; you recover some on descents.
  • Cell coverage drops in canyons — download offline maps before you go.

City insights

Denver, CO

  • Denver traffic is heaviest 7–9 am and 4–7 pm — time your arrival around it.
  • Denver draws year-round visitors — book parking and lodging ahead in peak weeks.
  • Government and event-day closures around downtown Denver can reroute traffic.

Billings, MT

  • Billings is a manageable origin/destination — light traffic outside of typical rush hours.

Best stops along the way

  • Pick a sit-down meal stop around the 2.5-hour mark to reset focus and avoid drive-thru fatigue.
  • Truck-stop plazas (Pilot, Love's, TA) reliably have fuel, food and clean restrooms every 60–90 miles.
  • Mountain pass viewpoints make great photo stops — but check brakes before long descents.

Seasonal notes

Winter

Snow, ice and chain-control zones from late November through March — carry an emergency kit.

Late summer / early fall

Western wildfire smoke can drop visibility and force I-5 / I-80 detours — check InciWeb.

Recommendations for this route

  • AWD or all-terrain tires help in winter; check brake pads before long descents.
  • Split the drive across a meal stop or overnight — fatigue starts hurting reaction time after 5 hours.
  • Run tires at the door-jamb PSI and pre-cool the cabin with AC on low — both add 1–3 MPG.

Is it cheaper to fly or drive?

For one or two people, driving usually wins on cost. Solo travelers with no luggage may find a budget flight cheaper once you add parking and meals.

A one-way drive uses about $66 in gas (28 MPG, $3.45/gal). A typical short domestic flight costs $80–$220 per person plus $30–$60/day for airport parking and any baggage fees.

Weather & best time

Late spring through early fall — winter snow can close passes and add hours to the drive.

  • • Mountain passes can see snow or ice from November through April — check road conditions before you leave.

Tolls

Mostly toll-free — you can drive this without a transponder.

Best vehicle

An SUV or all-wheel-drive crossover is ideal — better handling on mountain passes and storage for gear.

Driving difficulty

Long-haul · 8 hr 36 min

High — swap drivers every 2–3 hours and consider splitting the drive over a meal stop.

Doable in a single day

Most drivers complete this route in a single day. Leave early to avoid arriving tired in evening traffic.

About the drive from Denver to Billings

This 535-mile route between Denver, CO and Billings, MT is a popular drive in the region. Expect roughly 8 hr 36 min behind the wheel under normal traffic conditions.

Fuel-saving tips

  • Keep your speed near 65 mph — fuel economy drops sharply above 70.
  • Fill up before mountain or desert stretches; remote stations charge a premium.
  • Use GasBuddy or AAA to spot cheap stations along your route before you leave.
  • Use cruise control on flat sections only — long climbs benefit from light, steady throttle.

Frequently asked questions

How long does it take to drive from Denver to Billings?

The drive is about 535 miles and takes roughly 8 hr 36 min under normal traffic. Add buffer for stops, construction, and rush hour around either city.

How much gas does the trip use?

In a 28 MPG sedan, expect about 19.1 gallons one way. A 22 MPG SUV would use roughly 24.3 gallons.

What's the typical fuel cost?

At the US average of $3.45/gal, a 28 MPG vehicle costs about $65.92 one way. Round trip roughly doubles that. Use the calculator above for your exact MPG and local gas price.

How many fuel or charging stops will I need?

A typical gas sedan needs about 1 fuel stop one way. A modern EV with ~230 miles of highway range needs about 2 DC fast-charges.

Is it cheaper to drive or fly from Denver to Billings?

For one or two people, driving usually wins on cost. Solo travelers with no luggage may find a budget flight cheaper once you add parking and meals.

What's the best time of year to drive this route?

Late spring through early fall — winter snow can close passes and add hours to the drive.

Best vehicles for this route

Estimated 535-mile fuel cost for each pick at average US prices. Tap any vehicle for a full cost breakdown.

Cheapest to drive

Toyota Prius

57 MPG · hybrid

~$32

est. one-way fuel cost

See full breakdown

Best EV

Lucid Air

134 MPGe · ev

~$21

est. one-way charging cost

See full breakdown

Best sedan

Hyundai Elantra

37 MPG · sedan

~$50

est. one-way fuel cost

See full breakdown

Best SUV for comfort

Nissan Rogue

33 MPG · suv

~$56

est. one-way fuel cost

See full breakdown

Best truck for cargo

Ford Maverick

26 MPG · truck

~$71

est. one-way fuel cost

See full breakdown

Related routes

More routes like Denver to Billings

Reverse drives, connecting routes and regional alternatives — each with distance and driving cost at current US gas prices.

Reverse drive

Billings to Denver driving cost

535 mi · 8.6 h

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