How far is Trenton, ME from Portland, ME?
The driving distance from Trenton, ME to Portland, ME is about 149.3 miles (240.3 km), with a travel time of about 02h 46m by car.
- The straight-line flight distance is about 108.2 miles (174.2 km).
- For a round trip, plan for roughly 05h 32m 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 02h 46m.
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.
Town in Waldo County, Maine, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Clear
Driving Route Map
The map below follows the saved road route between Trenton and Portland.
Turn-by-Turn Driving Directions
Step-by-step road directions between Trenton and Portland.
-
1
Start on Bar Harbor Road
5.5 mi · 10 min · Bar Harbor Road
-
2
Continue on High Street
1.1 km · 2 min · High Street
-
3
Turn left onto Beechland Road
1 mi · 2 min · Beechland Road
-
4
At the end of the road, turn right onto Bayside Road
1 mi · 2 min · Bayside Road
-
5
Continue on Water Street
1.3 km · 1 min · Water Street
-
6
Turn left onto West Main Street
806 ft · 10 sec · West Main Street
-
7
Keep slight right to continue on Main Street
85 m · 4 sec · Main Street
-
8
Continue on Bucksport Road
8.5 mi · 10 min · Bucksport Road
-
9
Continue on Acadia Highway
9.4 mi · 11 min · Acadia Highway
-
10
Continue on Route 1
1.6 km · 1 min · Route 1
-
11
Continue on Main Street
41 m · 9 sec · Main Street
-
12
Turn left onto Route 1
682 ft · 17 sec · Route 1
-
13
Continue on US Highway 1
1.2 mi · 3 min · US Highway 1
-
14
Continue on Route 1
13.4 mi · 16 min · Route 1
-
15
Continue on Searsport Avenue
2.7 mi · 5 min · Searsport Avenue
-
16
Continue on Route 1
1.1 km · 1 min · Route 1
-
17
Take the exit slight right
1414 ft · 39 sec
-
18
Keep slight right
114 m · 12 sec
-
19
Merge slight left onto Belmont Avenue
3.9 mi · 5 min · Belmont Avenue
-
20
Continue on Augusta Road
4.8 mi · 5 min · Augusta Road
-
21
Continue on Belfast Augusta Road East
3.4 mi · 4 min · Belfast Augusta Road East
-
22
Continue on Acadia Highway
4 mi · 4 min · Acadia Highway
-
23
Continue on Belfast Augusta Road
17.6 mi · 21 min · Belfast Augusta Road
-
24
Continue on Belfast Road
1077 ft · 17 sec · Belfast Road
-
25
Continue on North Belfast Avenue
8.1 mi · 12 min · North Belfast Avenue
-
26
Turn left onto North Belfast Avenue
1.6 km · 2 min · North Belfast Avenue
-
27
At the end of the road, turn left onto Bangor Street
2936 ft · 53 sec · Bangor Street
-
28
Enter the roundabout and take exit 2 toward Cony Circle
49 m · 3 sec · Memorial Drive
-
29
Exit the rotary onto Memorial Drive
1.1 km · 2 min · Memorial Drive
-
30
Enter the roundabout and take exit 3 toward Memorial Circle
122 m · 7 sec · State Street
-
31
Exit the rotary onto State Street
1007 ft · 19 sec · State Street
-
32
Turn right onto Capitol Street
1.3 km · 1 min · Capitol Street
-
33
Turn straight onto Armory Street
915 ft · 20 sec · Armory Street
-
34
Turn left onto Western Avenue
1.1 km · 1 min · Western Avenue
-
35
Take the exit slight right toward I 95: Portland, Waterville, Bangor
1829 ft · 44 sec
-
36
Keep slight left to continue on I-95 South: Portland, Kittery
3262 ft · 1 min
-
37
Merge slight left onto Maine Turnpike
5.9 mi · 6 min · Maine Turnpike
-
38
Keep slight right to continue on I 295 South, ME 9, ME 126: Gardiner, Brunswick
46.5 mi · 53 min
-
39
Take the exit slight right toward US 1A
1.2 km · 2 min
-
40
Turn right onto Cumberland Avenue
1853 ft · 51 sec · Cumberland Avenue
-
41
Turn left onto Preble Street
555 ft · 19 sec · Preble Street
-
42
Turn left onto Congress Street
48 m · 5 sec · Congress Street
-
43
Arrive at your destination
0 m · 1 sec · Congress Street
Car Route Details
A richer read on the saved driving route between Trenton and 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
Keep slight right to continue on I 295 South, ME 9, ME 126: Gardiner, Brunswick
46.5 mi · 00h 53m
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.
Mostly Sunny leaving Trenton and Mostly Clear near Portland.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Trenton to Portland?
The road trip is about 149.3 miles (240.3 km) and usually takes 02h 46m 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?
Palermo is a useful midpoint, sitting about 73.6 miles from Trenton and 75.8 miles from Portland.
How much longer is the road route than the straight-line distance?
The direct path is about 108.2 miles (174.2 km), while the road route adds roughly 41.1 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 12:58 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $20.79 one way or $41.58 round trip. Estimated CO2 is about 46.8 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Trenton and Mostly Clear near Portland.
Stop Ideas Near Palermo
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Waterville Opera House
Sidney Town Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Palermo.
Augusta, ME
Waldoboro, Maine
Belfast, Maine
Camden/Rockport, Maine
Flight Path Map
This map shows the direct air route between Trenton and Portland. Straight-line distance: 108.24 mi (174.19 km).
#1 Trenton
Town in Maine
| Population | 1,568 |
| Coordinates | 44.4389700, -68.3700200 |
| Altitude | 18 |
| Country | United States |
#2 Portland
The most populous city in Cumberland County, Maine.
| Population | 66,803 |
| Coordinates | 43.6573700, -70.2589000 |
| Altitude | 19 |
| Country | United States |
End: Congress Street (-70.259094, 43.657504)
Estimated Travel Time
Distance: 240 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 58m |
| 40 mph (64.37 km/h) | 03h 44m |
| 50 mph (80.47 km/h) | 02h 59m |
| 60 mph (96.56 km/h) | 02h 29m |
| 70 mph (112.65 km/h) | 02h 08m |
| 80 mph (129 km/h) | 01h 51m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.95 | $20.79 | $41.58 |
| Mid-grade | $4.46 | $23.49 | $46.98 |
| Premium | $4.86 | $25.60 | $51.20 |
| Diesel | $6.00 | $31.60 | $63.21 |
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 12, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.