Decatur to Waukegan is 213.4 miles and takes about 4h 16m via US 51 and the Tri-State Tollway, with a fuel budget near $33 and enough daylight to finish in a day. This trip stays within Illinois, moving from the Midwest region northwards. Expect a mix of highway speeds and more local cruising as you make your way toward the Wisconsin border. With a recommended one-day drive, this route is ideal for a straightforward transit between these two Illinois cities, offering a practical way to cover the distance without needing an overnight stop.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
106.7 miles from Decatur, IL
A natural place for your longest stop of the day
, about 2h 7m into the drive
.
Main Roads
Road
Distance
Duration
US 51
122.1 mi
2h 16m
Tri-State Tollway
41.8 mi
50m
North Water Street
27.4 mi
36m
North 1450 East Road
14.7 mi
17m
Belvidere Road
1.9 mi
2m
Belvidere Street
1.6 mi
3m
South Jackson Street
0.5 mi
1m
Glen Rock Avenue
0.5 mi
1m
Longest stretch:
US 51
— 122.1 mi, about 2h 16m
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur, IL and Waukegan, IL.
1
Start on East Wood Street
507 ft·23 sec·East Wood Street
2
Turn left onto US 51 Business
0.4 mi·45 sec·South Franklin Street
3
Continue on US 51 Business
27 mi·36 min·North Water Street
4
Continue on US 51
15 mi·17 min·North 1450 East Road
Use the straight lane.
5
Take the exit onto US 51
122 mi·2 hr 16 min·US 51
Toward I 74 West, US 51 North: Peoria, RockfordUse the straight / slight right lanes.
6
Take the exit
1.6 mi·3 min
Exit 277AToward I 294 Tollway North: WisconsinUse the right lane.
7
Keep slight left at fork
0.3 mi·41 sec
Toward I 294 North: Wisconsin
8
Merge onto I 294
4.8 mi·5 min·Tri-State Tollway
Use the straight / slight right lanes.
9
Keep slight left at fork onto I 294
37 mi·45 min·Tri-State Tollway
Use the straight / slight right lanes.
10
Take the exit
0.4 mi·47 sec
Exit 11AToward IL 120 East: Belvidere RoadUse the straight / slight right lanes.
11
Turn straight onto IL 120
1.9 mi·2 min·Belvidere Road
12
Continue on IL 120
1.6 mi·3 min·Belvidere Street
13
Turn left onto Glen Rock Avenue
0.5 mi·1 min·Glen Rock Avenue
Use the left lane.
14
Turn left onto South Jackson Street
0.5 mi·1 min·South Jackson Street
15
Arrive at destination
North Jackson Street
Trip Plan
To make the most of this 4-hour drive, consider an early morning departure from Decatur to avoid any potential afternoon traffic as you approach Waukegan. Since it's a single-day trip, you have flexibility, but planning one stop around the halfway point or during the 122.1-mile stretch on US 51 would be wise for a break. Keep an eye on your fuel gauge, especially before leaving the longer highway segment, as services can be more spread out. The estimated fuel cost of $33 suggests budgeting slightly more to account for variations in gas prices.
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 106.7 miles from Decatur, IL, or about 2h 7m into the drive.
The longest continuous stretch on this route runs about 122.1 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 47 miles or 1h in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 106.7 miles or 2h 7m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 26m
Traffic, exits, and arrival timing usually matter more near Waukegan, IL than in the middle of the route.
Before You Leave
+
Open the route before leaving Decatur, IL 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 Decatur, IL
This is one driving day of about 213.4 miles and 4h 16m.
Your first comfortable stop window is around 47 miles from Decatur, IL.
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 US 51 for about 122.1 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 9
5 decision points cluster between mile 42.7 and 208.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
42.7 mi into trip|~55m in|US 51
Take the exit onto US 51 toward I 74 West, US 51 North: Peoria, Rockford
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 74 West, US 51 North: Peoria, Rockford
7
164.8 mi into trip|~3h 12m in
Take the exit toward I 294 Tollway North: Wisconsin
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the right lane.
Exit 277A
Toward I 294 Tollway North: Wisconsin
5
166.4 mi into trip|~3h 15m in
Keep slight left at fork toward I 294 North: Wisconsin
Highway fork - watch signs carefully
Toward I 294 North: Wisconsin
6
171.5 mi into trip|~3h 22m in|I 294 / Tri-State Tollway
Keep slight left at fork onto I 294 / Tri-State Tollway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
7
208.5 mi into trip|~4h 7m in
Take the exit toward IL 120 East: Belvidere Road
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 11A
Toward IL 120 East: Belvidere Road
Fuel & Cost
Regular Gas
$35.60 one way
$71.19 round trip
$4.24/gal25.4 MPG avg75 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.61
$38.69
$77.38
premium
$5.26
$44.18
$88.37
diesel
$6.18
$51.91
$103.83
Estimated Tolls: $2.51
Tri-state Tollway
(41.8 mi)$2.51
Toll estimates based on average 2024-2025 rates. EZ-Pass/SunPass discounts may lower the actual cost.
Estimated Trip Cost (one way, 1 person)
Fuel
$36
Tolls
$3
Meals
$25–$50
Total
$63–$88
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 74.7 kg one way.
Prices: EIA weekly data, 2026-10-12.
Driving Electric?
About $22 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
64
0
$22.41
$10.24
Efficient EV
53.4
0
$18.67
$8.54
EV Truck/SUV
85.4
1
$29.88
$13.66
Gas CO2
75 kg
EV CO2
25 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 Oct 18, 2026
Origin
Decatur, IL
Morning
in Decatur on Monday
Local time
8:25 AM
CDT
Current temp
67°F
Widespread Frost then Sunny
S 5 to 9 mph0% chanceLive forecast
Destination
Waukegan, IL
Morning
in Waukegan on Monday
Local time
8:25 AM
CDT
Current temp
61°F
Sunny
SSW 15 mph0% chanceLive forecast
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
6 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
4h 16m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Pullman National Historical Park
National Historical Park
In a growing Chicago neighborhood, diverse people and stories intertwined. All were seeking opportunity. Some succeeded. Others were limited—by race, gender, or economic status. Their stories came tog...
18 mi from route
~45 min detour
Free
near mile 169.2
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This route features 57% highway driving, meaning you'll spend a significant portion on faster roads. The longest continuous stretch is 122.1 miles on US 51, so plan for a solid block of cruising there. You'll transition from highway to surface roads, so be ready for changes in speed limits and exit density. Expect a mix of rural and suburban environments as you travel north.
57% highway, the rest on surface roads — varied driving throughout.
15 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 122.1 mi on US 51.
How Hard Is This Drive?
7/10
This route mixes highway mileage with some local-road sections near the start or finish. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 42.7 miles in near US 51.
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 9 significant decision points across 213.4 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 42.7 miles (US 51): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 164.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 166.4 miles: Highway fork - watch signs carefully.
Elevation Profile
Mostly flat terrain
810 ft542 ft
Total Climb
279 ft
Total Descent
303 ft
Highest Point
810 ft
~45.8 mi in
Elevation Range
267 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Decatur, IL to Waukegan, IL, road signs begin pointing toward Rockford along the way.
Waukegan is in the Far North Suburbs of the Chicagoland region of Illinois. It sits on Lake Michigan, has a large harbor, and is the county seat of Lake County, Illinois.
Top landmarks
•Waukegan Public Library — library in Waukegan, Illinois, United States
•Waukegan Building — office building in Waukegan, Illinois, United States
•Hotel Waukegan — historic hotel in Waukegan, Illinois, USA
Doable as a same-day drive at 4h 16m. Total distance: 213.4 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 16m drive, comfortable solo distance.
Scenic Drive
Mixed highway & surface route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 122.1 miles on US 51. The full list of main roads is in the Roads section above.
Expect about $2.51 in tolls one way, starting with Tri-state Tollway. Most Northeast and Midwest toll agencies accept E-ZPass; in the West and Texas, transponders like TxTag or FasTrak apply. If you do not have a transponder, cashless tolling plates will mail a bill to the vehicle's registered address — usually with a surcharge, so a rental-car toll pass is often cheaper than paying by mail.
Yes — we found about 19 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
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 Waukegan, IL 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. There are 19 rest areas along the route for bathroom stops.
The main spots that need attention: at 42.7 miles (US 51): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 164.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 166.4 miles: Highway fork - watch signs carefully.
Yes — Pullman National Historical Park. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 4.3 hours each way, an in-and-out day trip would put you behind the wheel for 8.6 hours — manageable with a long break at Waukegan, IL, but most travelers stay overnight.
