How far is Topsham, ME from South Portland, ME?
The driving distance from Topsham, ME to South Portland, ME is about 30.5 miles (49.1 km), with a travel time of about 00h 36m by car.
- The straight-line flight distance is about 23.8 miles (38.3 km).
- For a round trip, plan for roughly 01h 12m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM EDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
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 00h 36m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Census-designated place in Cumberland County, Maine
Route Weather Snapshot
Check the forecast at both ends before you head out.
Rain Showers Likely
Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Topsham and South Portland.
Turn-by-Turn Driving Directions
Step-by-step road directions between Topsham and South Portland.
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1
Start on Winter Street
14 m · 7 sec · Winter Street
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2
Turn left onto Mallett Drive
80 m · 9 sec · Mallett Drive
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3
Keep slight right to continue on Mallett Drive
1.2 km · 2 min · Mallett Drive
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4
Turn left onto Lewiston Road
2616 ft · 1 min · Lewiston Road
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5
Turn left onto I 295 South: Portland
2705 ft · 1 min
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6
Merge slight left
24.5 mi · 29 min
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7
Take the exit slight right toward US 1A
2130 ft · 1 min
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8
Turn right onto Marginal Way
2795 ft · 1 min · Marginal Way
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9
Continue on State Street
1.6 km · 2 min · State Street
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10
Continue on Casco Bay Bridge
1.1 mi · 2 min · Casco Bay Bridge
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11
Continue on Broadway
1.6 km · 2 min · Broadway
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12
Turn sharp right onto Pine Street
18 m · 3 sec · Pine Street
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13
Arrive at your destination
0 m · 1 sec · Pine Street
Car Route Details
A richer read on the saved driving route between Topsham and South Portland.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
I 295 South
Merge slight left
24.5 mi · 00h 29m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Rain Showers Likely leaving Topsham and Chance Rain Showers near South Portland.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Topsham to South Portland?
The road trip is about 30.5 miles (49.1 km) and usually takes 00h 36m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Yarmouth is a useful midpoint, sitting about 15.2 miles from Topsham and 15.4 miles from South Portland.
How much longer is the road route than the straight-line distance?
The direct path is about 23.8 miles (38.3 km), while the road route adds roughly 6.7 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 7:00 AM to 7:00 PM EDT. If you want a more comfortable same-day return, try to leave by 7:18 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.26 one way or $8.52 round trip. Estimated CO2 is about 9.6 kg one way.
What should you check before leaving?
Before you leave, expect Rain Showers Likely around Topsham and Chance Rain Showers near South Portland.
Stop Ideas Near Yarmouth
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 Yarmouth.
Freeport
Portland Transportation Center
Brunswick Maine Street Station
Bath, Maine
Flight Path Map
This map shows the direct air route between Topsham and South Portland. Straight-line distance: 23.78 mi (38.27 km).
#1 Topsham
Town in Maine, United States
| Population | 8,942 |
| Coordinates | 43.9275800, -69.9758800 |
| Altitude | 40 |
| Country | United States |
#2 South Portland
City in Cumberland County, Maine, USA
| Population | 25,950 |
| Coordinates | 43.6414700, -70.2408800 |
| Altitude | 7 |
| Country | United States |
End: Pine Street (-70.240981, 43.641461)
Estimated Travel Time
Distance: 49 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 01m |
| 40 mph (64.37 km/h) | 00h 45m |
| 50 mph (80.47 km/h) | 00h 36m |
| 60 mph (96.56 km/h) | 00h 30m |
| 70 mph (112.65 km/h) | 00h 26m |
| 80 mph (129 km/h) | 00h 22m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.95 | $4.26 | $8.52 |
| Mid-grade | $4.46 | $4.81 | $9.63 |
| Premium | $4.86 | $5.25 | $10.49 |
| Diesel | $6.00 | $6.48 | $12.95 |
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 Maine · May 13, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.