Dillon to Sidney is 526.2 miles and takes about 9h 22m via I 90 and I 94, with a fuel budget near $83 and enough daylight to finish in a day. This long-distance drive traverses the Mountain West region of Montana, offering a straightforward path across the state. While it's a significant mileage for a single day, the predominantly interstate travel makes it manageable. Consider this route if you're looking for an efficient way to cover ground within Montana, prioritizing directness over extensive sightseeing.
Trip Pace
Best split across 2 days
Treat the return leg as its own travel day rather than an afterthought.
Break Rhythm
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
263.1 miles from Dillon, MT
A natural place for your longest stop of the day
, about 4h 50m into the drive
.
Main Roads
Road
Distance
Duration
I 94
212.2 mi
3h 32m
I 90
206.6 mi
3h 26m
MT 16
49 mi
56m
MT 41
27.1 mi
40m
Main Street
14.4 mi
21m
Mount Highway 55
9.6 mi
14m
South Central Avenue
2.5 mi
2m
Montana Highway 55
2.1 mi
3m
Longest stretch:
I 94
— 212.2 mi, about 3h 32m
Turn-by-Turn Driving Directions
Step-by-step road directions between Dillon, MT and Sidney, MT.
1
Start on South Idaho Street
0.2 mi·43 sec·South Idaho Street
2
Turn left onto I 15 Business
345 ft·15 sec·East Helena Street
3
At end of road, turn right onto I 15 Business
0.8 mi·1 min·Montana Street
4
Continue on MT 41
27 mi·40 min·MT 41
5
At end of road, turn left onto MT 41
14 mi·21 min·Main Street
6
Turn straight onto MT 55
2.1 mi·3 min·Montana Highway 55
7
Continue on MT 55
0.3 mi·27 sec·State Highway 55
8
Turn straight onto MT 55
9.6 mi·14 min·Mount Highway 55
9
Turn right onto MT 2; MT 55
0.4 mi·41 sec·West Legion Avenue
10
Turn left onto MT 55
0.5 mi·49 sec·North Whitehall Street
11
Take the ramp
0.2 mi·24 sec
12
Merge onto I 90
207 mi·3 hr 26 min·I 90
13
Keep slight left at fork onto I 94
212 mi·3 hr 32 min·I 94
Toward I 94 East: Bismark
14
Take the exit
0.3 mi·38 sec
Toward MT 16: Glendive, Sidney
15
Turn left onto MT 16
49 mi·56 min·MT 16
16
Enter roundabout onto MT 16; MT 200
130 ft·1 sec·South Central Avenue
17
Continue on MT 16; MT 200
2.5 mi·2 min·South Central Avenue
18
Arrive at destination
MT 16; MT 200
Trip Plan
Given the 9-hour drive time, an overnight stop is highly recommended to make this trip more comfortable and safe. Aim to depart Dillon in the morning to allow for ample daylight for your journey and to break up the drive into two manageable days. Plan your stops strategically, perhaps around the 2-stop recommendation, and be mindful of fuel availability, especially since much of the route is on interstates. Keep an eye on your fuel gauge as you approach Sidney, as services can sometimes be spread out on these longer stretches.
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
This drive is better paced as a 2-day trip.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 263.1 miles from Dillon, MT, or about 4h 50m into the drive.
The longest continuous stretch on this route runs about 212.2 miles.
Consider an overnight stop or starting very early.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 116 miles or 2h 23m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 263.1 miles or 4h 50m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Overnight split
Day 1 wrap after about 263.1 miles or 4h 50m
Stop before fatigue turns the last few hours into a grind. You want day two to start fresh, not just resumed.
Final approach
Final hour starts around 8h 14m
Traffic, exits, and arrival timing usually matter more near Sidney, MT than in the middle of the route.
Before You Leave
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Open the route before leaving Dillon, MT so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
+
Treat this as a 2-day road trip and book the overnight stop before the busiest arrival window.
Day 1
Settle into the route from Dillon, MT
Aim for roughly 263 miles and 4.7 hours of wheel time on this day.
Day 2
Finish the approach into Sidney, MT
Aim for roughly 263 miles and 4.7 hours of wheel time on this day.
Your first comfortable stop window is around 116 miles from Dillon, MT.
This route usually feels better as a 2-day drive than as one long push.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on I 94 for about 212.2 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
3.8 mi from route
~10 min detour
$10 to $20
mile 451
Fallon, Montana
Hours: 12–8 pm
+14064865400
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 11
5 decision points cluster between mile 0.3 and 474.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
0.3 mi into trip|~0m in|I 15 Business / Montana Street
At end of road, turn right onto I 15 Business / Montana Street
Navigation decision point
5
28.2 mi into trip|~42m in|MT 41 / Main Street
At end of road, turn left onto MT 41 / Main Street
Navigation decision point
4
55.5 mi into trip|~1h 23m in
Take the ramp
Navigation decision point
5
262.3 mi into trip|~4h 50m in|I 94
Keep slight left at fork onto I 94 toward I 94 East: Bismark
Highway fork - watch signs carefully
Toward I 94 East: Bismark
5
474.4 mi into trip|~8h 23m in
Take the exit toward MT 16: Glendive, Sidney
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward MT 16: Glendive, Sidney
Fuel & Cost
Regular Gas
$83.38 one way
$166.77 round trip
$4.03/gal25.4 MPG avg184 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.22
$87.40
$174.81
premium
$4.53
$93.87
$187.73
diesel
$5.61
$116.18
$232.36
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$83
Hotel (1n)
$80–$140
Meals
$50–$100
Total
$213–$323
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 184.1 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $55 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
157.9
1
$55.25
$25.26
Efficient EV
131.6
1
$46.04
$21.05
EV Truck/SUV
210.5
2
$73.67
$33.68
Gas CO2
184 kg
EV CO2
62 kg (66% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Apr 15, 2026
Origin
Dillon, MT
Evening
in Dillon on Saturday
Local time
7:23 PM
MDT
Current temp
64°F
Unavailable
Live forecast
Destination
Sidney, MT
Evening
in Sidney on Saturday
Local time
7:23 PM
MDT
Current temp
70°F
Unavailable
Live forecast
71°F
Livingston, MT
174 mi in
76°F
Forsyth, MT
347 mi in
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
For long drives, weather on day two can matter just as much as conditions at departure, so check the whole travel window rather than only the first day.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
6 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
9h 22m on the road
This is long enough that the arrival forecast matters almost as much as departure conditions. Recheck both ends before you roll.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
More Details
What kind of drive is this?
This journey is characterized by its high highway share, with 96% of the drive on interstates like I 90 and I 94. Expect long, uninterrupted stretches, including a notable 212.2-mile segment on I 94. The personality of the road is largely that of a fast-paced, long-distance corridor, designed for efficient travel. While the majority of the route is on major highways, the inclusion of MT 16 suggests a brief transition onto a different type of roadway as you approach your destination.
96% highway — fuel and pacing are the main things to plan.
18 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 212.2 mi on I 94.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on I 94 and I 90. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.3 miles in near I 15 Business / Montana Street.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
The route itself is not hard, but at 9h 22m, endurance matters. Plan breaks every 2-3 hours. The 11 decision points are all manageable with basic attention.
Where does it get tricky?
The main spots that need attention: at 0.3 miles (I 15 Business / Montana Street): Navigation decision point; at 28.2 miles (MT 41 / Main Street): Navigation decision point; at 55.5 miles: Navigation decision point.
Who Is This Route For?
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
The longest stretch is about 212.2 miles on I 94. The full list of main roads is in the Roads section above.
Yes — a 2-day pace is more comfortable than one long haul. A sensible stopping point is after roughly 263 miles on day one.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
It helps. This is a long drive, so arriving tired and in the dark compounds. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Sidney, MT before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 2 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
Mostly yes along the main roads, but rural stretches through MT can have sparse or no coverage. Before you leave, download offline Google Maps or Apple Maps for the route, and consider downloading music or podcasts instead of streaming. If you depend on data for navigation, keep a paper backup of the turn-by-turn directions.
The main spots that need attention: at 0.3 miles (I 15 Business / Montana Street): Navigation decision point; at 28.2 miles (MT 41 / Main Street): Navigation decision point; at 55.5 miles: Navigation decision point.
Not recommended in a single day. At 9.4 hours each way, a round trip means 18.8 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Sidney, MT before the return drive.
