How far is Star, ID from Ammon, ID?
The driving distance from Star, ID to Ammon, ID is about 302 miles (486 km), with a travel time of about 04h 21m by car.
- The straight-line flight distance is about 227 miles (365.4 km).
- For a round trip, plan for roughly 08h 42m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 04h 21m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Twin Falls County, Idaho, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Rain Showers
Light Rain Likely then Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Star and Ammon.
Turn-by-Turn Driving Directions
Step-by-step road directions between Star and Ammon.
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1
Start on West State Street
14 m · 6 sec · West State Street
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2
Turn right onto South Star Road
5 mi · 8 min · South Star Road
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3
Enter the roundabout and take exit 3 toward Cherry Lane
59 m · 4 sec · Cherry Lane
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4
Exit the roundabout onto Cherry Lane
1.6 km · 2 min · Cherry Lane
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5
Turn right onto North McDermott Road
1 mi · 2 min · North McDermott Road
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6
Turn left onto West Franklin Road
2 mi · 3 min · West Franklin Road
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7
Turn right onto South Ten Mile Road
1.3 km · 1 min · South Ten Mile Road
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8
Take the ramp slight left toward I 84 East
1.2 km · 55 sec
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9
Merge slight left onto Vietnam Veterans Memorial Highway
6.3 mi · 7 min · Vietnam Veterans Memorial Highway
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10
Keep slight right to continue on Vietnam Veterans Memorial Highway
172.3 mi · 2 hr 43 min · Vietnam Veterans Memorial Highway
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11
Continue straight
62.7 mi · 59 min
-
12
Keep slight left to continue on Idaho Falls
3046 ft · 40 sec
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13
Merge slight right
43.2 mi · 41 min
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14
Take the exit slight right toward I 15 Business, US 26: Ammon, Jackson
1448 ft · 36 sec
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15
Turn right onto West Sunnyside Road
5.9 mi · 9 min · West Sunnyside Road
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16
Turn left onto Central Avenue
753 ft · 35 sec · Central Avenue
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17
Turn right onto Molen Street
41 m · 6 sec · Molen Street
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18
Arrive at your destination
0 m · 1 sec · Molen Street
Car Route Details
A richer read on the saved driving route between Star and Ammon.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Vietnam Veterans Memorial Highway
Keep slight right to continue on Vietnam Veterans Memorial Highway
172 mi · 02h 43m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Rain Showers leaving Star and Light Rain Likely then Showers And Thunderstorms near Ammon.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Star to Ammon?
The road trip is about 302 miles (486 km) and usually takes 04h 21m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Hansen is a useful midpoint, sitting about 150.8 miles from Star and 151.2 miles from Ammon.
How much longer is the road route than the straight-line distance?
The direct path is about 227 miles (365.4 km), while the road route adds roughly 75 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 8:18 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $41.50 one way or $83.00 round trip. Estimated CO2 is about 94.7 kg one way.
What should you check before leaving?
Before you leave, expect Rain Showers around Star and Light Rain Likely then Showers And Thunderstorms near Ammon.
Stop Ideas Near Hansen
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Hansen.
Twin Falls, Idaho
Flight Path Map
This map shows the direct air route between Star and Ammon. Straight-line distance: 227.07 mi (365.43 km).
#1 Star
City in Ada County, Idaho, United States
| Population | 10,532 |
| Coordinates | 43.6921100, -116.4934600 |
| Altitude | 753 |
| Country | United States |
#2 Ammon
City in Idaho, United States
| Population | 17,115 |
| Coordinates | 43.4696400, -111.9666400 |
| Altitude | 1437 |
| Country | United States |
End: Molen Street (-111.966641, 43.469622)
Estimated Travel Time
Distance: 486 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 03m |
| 40 mph (64.37 km/h) | 07h 32m |
| 50 mph (80.47 km/h) | 06h 02m |
| 60 mph (96.56 km/h) | 05h 01m |
| 70 mph (112.65 km/h) | 04h 18m |
| 80 mph (129 km/h) | 03h 46m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $41.50 | $83.00 |
| Mid-grade | $4.23 | $45.10 | $90.20 |
| Premium | $4.55 | $48.49 | $96.98 |
| Diesel | $5.41 | $57.69 | $115.38 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Idaho · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.