How far is Killingworth, CT from Fairfield, CT?
The driving distance from Killingworth, CT to Fairfield, CT is about 50 miles (80.4 km), with a travel time of about 00h 54m by car.
- The straight-line flight distance is about 39.3 miles (63.3 km).
- For a round trip, plan for roughly 01h 48m 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 00h 54m.
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.
The most populous city in New Haven County, Connecticut.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Killingworth and Fairfield.
Turn-by-Turn Driving Directions
Step-by-step road directions between Killingworth and Fairfield.
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1
Start on the route
51 m · 14 sec
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2
At the end of the road, turn right
43 m · 13 sec
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3
Turn right onto Deep River Road
148 m · 9 sec · Deep River Road
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4
Enter the roundabout and take exit 2 toward North Branford Road
50 m · 3 sec · North Branford Road
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5
Exit the roundabout onto North Branford Road
2.8 mi · 4 min · North Branford Road
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6
Continue on Old Toll Road
1.3 mi · 2 min · Old Toll Road
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7
Enter the roundabout and take exit 2 toward Old Toll Road
101 m · 5 sec · Old Toll Road
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8
Exit the roundabout onto Old Toll Road
5.9 mi · 9 min · Old Toll Road
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9
Continue on Foxon Road
7.3 mi · 11 min · Foxon Road
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10
Continue on Foxon Boulevard
1.3 km · 2 min · Foxon Boulevard
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11
Continue on Middletown Avenue
149 m · 8 sec · Middletown Avenue
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12
Continue on Middletown Avenue
1.4 km · 1 min · Middletown Avenue
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13
Turn right onto Ferry Street
123 m · 14 sec · Ferry Street
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14
Turn left onto State Street
110 m · 9 sec · State Street
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15
Turn right onto Warren Place
18 m · 3 sec · Warren Place
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16
Take the ramp slight left toward I 91 South
1128 ft · 28 sec
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17
Merge slight left
1.8 mi · 3 min
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18
Merge slight left
22.8 mi · 32 min
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19
Take the exit slight right toward Mill Plain Road
1525 ft · 42 sec
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20
Turn left onto Mill Plain Road
1655 ft · 39 sec · Mill Plain Road
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21
Turn right onto Post Road
57 m · 3 sec · Post Road
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22
Arrive at your destination
0 m · 1 sec · Post Road
Car Route Details
A richer read on the saved driving route between Killingworth and Fairfield.
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 91 South
Merge slight left
22.8 mi · 00h 32m
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 Killingworth and Mostly Sunny near Fairfield.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Killingworth to Fairfield?
The road trip is about 50 miles (80.4 km) and usually takes 00h 54m 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?
West Haven is a useful midpoint, sitting about 22.4 miles from Killingworth and 27.6 miles from Fairfield.
How much longer is the road route than the straight-line distance?
The direct path is about 39.3 miles (63.3 km), while the road route adds roughly 10.7 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 8:00 AM to 10:00 AM EDT. If you want a more comfortable same-day return, try to leave by 4:42 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $6.94 one way or $13.89 round trip. Estimated CO2 is about 15.6 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Killingworth and Mostly Sunny near Fairfield.
Stop Ideas Near West Haven
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 West Haven.
Union Station
Bridgeport
Wallingford station
Meriden Transit Center
Flight Path Map
This map shows the direct air route between Killingworth and Fairfield. Straight-line distance: 39.33 mi (63.3 km).
#1 Killingworth
Human settlement in Middlesex County, Connecticut, United States of America
| Population | 6,340 |
| Coordinates | 41.3581500, -72.5637000 |
| Altitude | 117 |
| Country | United States |
#2 Fairfield
Town in Connecticut, United States of America
| Population | 62,215 |
| Coordinates | 41.1412100, -73.2637300 |
| Altitude | 10 |
| Country | United States |
End: Post Road (-73.263724, 41.141186)
Estimated Travel Time
Distance: 80 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 39m |
| 40 mph (64.37 km/h) | 01h 14m |
| 50 mph (80.47 km/h) | 00h 59m |
| 60 mph (96.56 km/h) | 00h 49m |
| 70 mph (112.65 km/h) | 00h 42m |
| 80 mph (129 km/h) | 00h 37m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.95 | $6.94 | $13.89 |
| Mid-grade | $4.46 | $7.84 | $15.69 |
| Premium | $4.86 | $8.55 | $17.10 |
| Diesel | $6.00 | $10.55 | $21.11 |
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 Connecticut · May 30, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.