Johnston, IA to Sioux City, IA is 198.5 miles and takes about 3h 38m via I 80, with a fuel budget near $31 and enough daylight to finish in a day. This trip stays within the Midwest, connecting two points in Iowa. It's a straightforward, highway-focused drive that's perfect for a single-day journey. You'll spend most of your time on interstates, making it an efficient way to get from one city to the other. Consider this route if you need a quick and uncomplicated drive across the state.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
99.2 miles from Johnston, IA
A natural place for your longest stop of the day
, about 1h 49m into the drive
.
Main Roads
Road
Distance
Duration
I 80
102.7 mi
1h 51m
I 29
75.3 mi
1h 21m
I 880
16.7 mi
17m
Merle Hay Road
1.4 mi
2m
South Floyd Boulevard
0.6 mi
1m
Court Street
0.2 mi
<1m
9th Street
0.2 mi
<1m
6th Street
<0.1 mi
<1m
Longest stretch:
I 80
— 102.7 mi, about 1h 51m
Turn-by-Turn Driving Directions
Step-by-step road directions between Johnston, IA and Sioux City, IA.
1
Start on Merle Hay Road
1.4 mi·2 min·Merle Hay Road
2
Take the ramp
0.4 mi·56 sec
Toward I 35 South, I 80 West
3
Merge onto I 80; I 35
7.1 mi·8 min·I 80; I 35
Use the straight / slight right lanes.
4
Keep slight right at fork onto I 80
96 mi·1 hr 42 min·I 80
Toward I 80 West: OmahaUse the straight / slight right lanes.
5
Keep slight right at fork onto I 880
17 mi·17 min·I 880
Exit 27Toward I 880 West: North Omaha, Sioux CityUse the slight right lane.
6
Keep slight right at fork
0.4 mi·38 sec
Exit 0BToward I 29 North: Sioux City
7
Merge onto I 29
75 mi·1 hr 21 min·I 29
8
Take the exit
0.3 mi·43 sec
Toward Floyd Boulevard, Virginia Street
9
Turn right onto South Floyd Boulevard
0.6 mi·1 min·South Floyd Boulevard
Use the right lane.
10
Turn left onto 5th Street
396 ft·14 sec·5th Street
11
Turn right onto Iowa Street
346 ft·7 sec·Iowa Street
12
Keep slight left at fork onto 6th Street
426 ft·17 sec·6th Street
Use the left lane.
13
Turn right onto Court Street
0.2 mi·39 sec·Court Street
14
Turn left onto 9th Street
0.2 mi·45 sec·9th Street
15
Turn right
115 ft·8 sec
16
Arrive at destination
Trip Plan
Given this is a 1-day trip of under 4 hours, you have a lot of flexibility with your departure time. Leaving mid-morning allows you to avoid rush hour and arrive in Sioux City with plenty of daylight. With only one recommended stop, you can easily power through this drive. Keep an eye on your fuel levels, especially during the longest stretch on I 80, as services can sometimes be spaced out on interstates.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 99.2 miles from Johnston, IA, or about 1h 49m into the drive.
The longest continuous stretch on this route runs about 102.7 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 44 miles or 49m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 99.2 miles or 1h 49m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 57m
Traffic, exits, and arrival timing usually matter more near Sioux City, IA than in the middle of the route.
Before You Leave
+
Open the route before leaving Johnston, IA 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.
Day 1
Settle into the route from Johnston, IA
This is one driving day of about 198.5 miles and 3h 38m.
Your first comfortable stop window is around 44 miles from Johnston, IA.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on I 80 for about 102.7 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 14
5 decision points cluster between mile 9 and 198 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
9 mi into trip|~11m in|I 80
Keep slight right at fork onto I 80 toward I 80 West: Omaha
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 80 West: Omaha
9
104.5 mi into trip|~1h 54m in|I 880
Keep slight right at fork onto I 880 toward I 880 West: North Omaha, Sioux City
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 27
Toward I 880 West: North Omaha, Sioux City
6
121.2 mi into trip|~2h 12m in
Keep slight right at fork toward I 29 North: Sioux City
Highway fork - watch signs carefully
Exit 0B
Toward I 29 North: Sioux City
6
197.2 mi into trip|~3h 35m in|South Floyd Boulevard
Turn right onto South Floyd Boulevard
Lane positioning matters here
Use the right lane.
7
198 mi into trip|~3h 37m in|6th Street
Keep slight left at fork onto 6th Street
Highway fork - watch signs carefully. Lane positioning matters here
Use the left lane.
Fuel & Cost
Regular Gas
$31.03 one way
$62.07 round trip
$3.97/gal25.4 MPG avg70 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$34.07
$68.15
premium
$4.89
$38.20
$76.40
diesel
$5.61
$43.83
$87.65
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$31
Meals
$25–$50
Total
$56–$81
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 69.5 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $21 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
59.6
0
$20.84
$9.53
Efficient EV
49.6
0
$17.37
$7.94
EV Truck/SUV
79.4
0
$27.79
$12.70
Gas CO2
69 kg
EV CO2
23 kg (67% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
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 20, 2026
Origin
Johnston, IA
Late night
in Johnston on Tuesday
Local time
4:26 AM
CDT
Current temp
60°F
Unavailable
Live forecast
Destination
Sioux City, IA
Late night
in Sioux City on Tuesday
Local time
4:26 AM
CDT
Current temp
59°F
Unavailable
Live forecast
41°F
Avoca, IA
99 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.
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
1 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
3h 38m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
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 route is predominantly a highway-focused drive, with 98% of the journey on major interstates. You'll experience long stretches of uninterrupted driving, including the longest segment of 102.7 miles on I 80. The character of the drive is largely consistent, prioritizing efficiency over varied scenery. Expect a smooth, fast-paced experience primarily on I 80 and I 29, designed for covering ground quickly.
98% highway — fuel and pacing are the main things to plan.
16 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 102.7 mi on I 80.
How Hard Is This Drive?
7/10
This is a straightforward highway drive that stays mostly on I 80 and I 29. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 9 miles in near I 80.
Driving Effort7/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 14 significant decision points across 198.5 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 9 miles (I 80): Highway fork - watch signs carefully. Lane positioning matters here; at 104.5 miles (I 880): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 121.2 miles: Highway fork - watch signs carefully.
Sioux City is on the western edge of the state of Iowa. It is on the Missouri River and many parts of Sioux City are among the unique Loess Hills formations.
Doable as a same-day drive at 3h 38m. Total distance: 198.5 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
3h 38m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (98%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 102.7 miles on I 80. The full list of main roads is in the Roads section above.
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 route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Sioux City, IA 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 1 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 9 miles (I 80): Highway fork - watch signs carefully. Lane positioning matters here; at 104.5 miles (I 880): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 121.2 miles: Highway fork - watch signs carefully.
Possible but tiring. At 3.6 hours each way, an in-and-out day trip would put you behind the wheel for 7.3 hours — manageable with a long break at Sioux City, IA, but most travelers stay overnight.
