How far is Port Byron, IL from Markham, IL?
The driving distance from Port Byron, IL to Markham, IL is about 158.4 miles (255 km), with a travel time of about 02h 32m by car.
- The straight-line flight distance is about 136.5 miles (219.6 km).
- For a round trip, plan for roughly 05h 04m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 02h 32m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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 LaSalle County, Illinois, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Port Byron and Markham.
Turn-by-Turn Driving Directions
Step-by-step road directions between Port Byron and Markham.
-
1
Start on Cherry Street
25 m · 5 sec · Cherry Street
-
2
Turn right onto South High Street
1.1 mi · 2 min · South High Street
-
3
Continue on 2nd Avenue
2 mi · 4 min · 2nd Avenue
-
4
Turn left
2485 ft · 1 min
-
5
Merge slight left
9.5 mi · 10 min
-
6
Keep slight right to continue on I 80 East: Chicago
144.5 mi · 2 hr 40 min
-
7
Take the exit slight right toward Kedzie Avenue
1232 ft · 33 sec
-
8
Turn left onto Kedzie Avenue
1.3 km · 2 min · Kedzie Avenue
-
9
Turn left onto 163rd Street
20 m · 3 sec · 163rd Street
-
10
Arrive at your destination
0 m · 1 sec · 163rd Street
Car Route Details
A richer read on the saved driving route between Port Byron and Markham.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 80 East
Keep slight right to continue on I 80 East: Chicago
145 mi · 02h 40m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Sunny leaving Port Byron and Mostly Sunny near Markham.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Port Byron to Markham?
The road trip is about 158.4 miles (255 km) and usually takes 02h 32m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
La Salle is a useful midpoint, sitting about 79.2 miles from Port Byron and 79.3 miles from Markham.
How much longer is the road route than the straight-line distance?
The direct path is about 136.5 miles (219.6 km), while the road route adds roughly 21.9 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 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 1:26 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $21.08 one way or $42.16 round trip. Estimated CO2 is about 49.7 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Port Byron and Mostly Sunny near Markham.
Stop Ideas Near La Salle
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 La Salle.
Mendota station
Princeton
Plano
Dwight station
Flight Path Map
This map shows the direct air route between Port Byron and Markham. Straight-line distance: 136.43 mi (219.57 km).
#1 Port Byron
City in Illinois, United States of America
| Population | 1,597 |
| Coordinates | 41.6064200, -90.3354100 |
| Altitude | 184 |
| Country | United States |
#2 Markham
A city located in Cook County, Illinois.
| Population | 13,400 |
| Coordinates | 41.5936500, -87.6947700 |
| Altitude | 189 |
| Country | United States |
End: 163rd Street (-87.694771, 41.593508)
Estimated Travel Time
Distance: 255 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 16m |
| 40 mph (64.37 km/h) | 03h 57m |
| 50 mph (80.47 km/h) | 03h 10m |
| 60 mph (96.56 km/h) | 02h 38m |
| 70 mph (112.65 km/h) | 02h 15m |
| 80 mph (129 km/h) | 01h 58m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $21.08 | $42.16 |
| Mid-grade | $4.25 | $23.77 | $47.55 |
| Premium | $4.65 | $26.02 | $52.03 |
| Diesel | $5.30 | $29.65 | $59.30 |
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 Illinois · 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.