How far is South Portland, ME from Monmouth, ME?
The driving distance from South Portland, ME to Monmouth, ME is about 52.1 miles (83.8 km), with a travel time of about 01h 10m by car.
- The straight-line flight distance is about 42.5 miles (68.4 km).
- For a round trip, plan for roughly 02h 20m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM EDT.
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 01h 10m.
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 Maine, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Rain Showers
Chance Rain Showers
Driving Route Map
The map below follows the saved road route between South Portland and Monmouth.
Turn-by-Turn Driving Directions
Step-by-step road directions between South Portland and Monmouth.
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1
Start on Pine Street
18 m · 10 sec · Pine Street
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2
Turn sharp left onto Broadway
1.6 km · 2 min · Broadway
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3
Continue on Casco Bay Bridge
1.1 mi · 2 min · Casco Bay Bridge
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4
Turn straight onto York Street
785 ft · 19 sec · York Street
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5
Turn left onto High Street
1.3 km · 1 min · High Street
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6
Continue on Forest Avenue
2.4 mi · 3 min · Forest Avenue
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7
Take the exit slight right
61 m · 9 sec
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8
Turn slight right onto Allen Avenue
1.3 km · 2 min · Allen Avenue
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9
Turn left onto Washington Avenue
80 m · 7 sec · Washington Avenue
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10
Continue on Auburn Street
1.7 mi · 4 min · Auburn Street
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11
Continue on Gray Road
2967 ft · 1 min · Gray Road
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12
Take the ramp left
957 ft · 41 sec
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13
Keep slight right to continue on I 95 North: Lewiston, Augusta
854 ft · 21 sec
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14
Merge slight left onto Maine Turnpike
14.1 mi · 15 min · Maine Turnpike
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15
Keep slight left to continue on Maine Turnpike
8.1 mi · 9 min · Maine Turnpike
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16
Take the exit slight right toward US 202, ME 4, ME 100: Auburn
1630 ft · 42 sec
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17
At the end of the road, turn left onto Washington Street
4.2 mi · 6 min · Washington Street
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18
Merge slight right onto Minot Avenue
2665 ft · 41 sec · Minot Avenue
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19
Turn right onto Court Street
2156 ft · 37 sec · Court Street
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20
Continue on Main Street
4.9 mi · 6 min · Main Street
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21
Continue on Route 202
3.8 mi · 4 min · Route 202
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22
Continue on US Route 202
1 km · 43 sec · US Route 202
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23
Continue on Route 202
2.7 mi · 3 min · Route 202
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24
Continue on US Route 202
1.5 km · 1 min · US Route 202
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25
Turn slight right onto Norris Hill Road
1.3 mi · 3 min · Norris Hill Road
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26
Turn right onto Blue Road
1.3 km · 2 min · Blue Road
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27
At the end of the road, turn right onto Main Street
1048 ft · 26 sec · Main Street
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28
Turn right
15 m · 6 sec
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29
Turn right
9 m · 2 sec
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30
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between South Portland and Monmouth.
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.
Maine Turnpike
Merge slight left onto Maine Turnpike
14.1 mi · 00h 15m
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.
Slight Chance Rain Showers leaving South Portland and Chance Rain Showers near Monmouth.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from South Portland to Monmouth?
The road trip is about 52.1 miles (83.8 km) and usually takes 01h 10m 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?
New Gloucester is a useful midpoint, sitting about 26 miles from South Portland and 26 miles from Monmouth.
How much longer is the road route than the straight-line distance?
The direct path is about 42.5 miles (68.4 km), while the road route adds roughly 9.6 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 EDT. If you want a more comfortable same-day return, try to leave by 4:10 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $7.26 one way or $14.52 round trip. Estimated CO2 is about 16.4 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Rain Showers around South Portland and Chance Rain Showers near Monmouth.
Stop Ideas Near New Gloucester
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 New Gloucester.
Freeport
Brunswick Maine Street Station
Portland Transportation Center
Bath, Maine
Flight Path Map
This map shows the direct air route between South Portland and Monmouth. Straight-line distance: 42.51 mi (68.41 km).
#1 South Portland
City in Cumberland County, Maine, USA
| Population | 25,950 |
| Coordinates | 43.6414700, -70.2408800 |
| Altitude | 7 |
| Country | United States |
#2 Monmouth
Town in Kennebec County, Maine, United States
| Population | 4,172 |
| Coordinates | 44.2386800, -70.0356100 |
| Altitude | 83 |
| Country | United States |
End: Monmouth (-70.03561, 44.23868)
Estimated Travel Time
Distance: 84 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 44m |
| 40 mph (64.37 km/h) | 01h 18m |
| 50 mph (80.47 km/h) | 01h 02m |
| 60 mph (96.56 km/h) | 00h 52m |
| 70 mph (112.65 km/h) | 00h 44m |
| 80 mph (129 km/h) | 00h 38m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.95 | $7.26 | $14.52 |
| Mid-grade | $4.46 | $8.20 | $16.40 |
| Premium | $4.86 | $8.94 | $17.88 |
| Diesel | $6.00 | $11.03 | $22.07 |
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 · 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.