How far is Frederick, MD from Adelphi, MD?
The driving distance from Frederick, MD to Adelphi, MD is about 42.9 miles (69.1 km), with a travel time of about 01h 00m by car.
- The straight-line flight distance is about 36.8 miles (59.3 km).
- For a round trip, plan for roughly 02h 00m 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 00m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
The second most populous city in Montgomery County, Maryland.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Cloudy
Partly Cloudy
Driving Route Map
The map below follows the saved road route between Frederick and Adelphi.
Turn-by-Turn Driving Directions
Step-by-step road directions between Frederick and Adelphi.
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1
Start on East Patrick Street
37 m · 8 sec · East Patrick Street
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2
Turn right onto North Market Street
133 m · 19 sec · North Market Street
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3
Turn right onto East Church Street
1577 ft · 48 sec · East Church Street
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4
Turn right onto North East Street
1 km · 2 min · North East Street
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5
Enter the roundabout and take exit 1 toward East Street
31 m · 2 sec · East Street
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6
Exit the roundabout onto East Street
742 ft · 15 sec · East Street
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7
Continue on Buckeystown Pike
1.7 mi · 3 min · Buckeystown Pike
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8
Take the ramp straight toward I 270 South
1247 ft · 34 sec
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9
Merge slight left onto Eisenhower Memorial Highway
21.6 mi · 27 min · Eisenhower Memorial Highway
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10
Keep slight left
6.6 mi · 9 min
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11
Keep slight left to continue on I 270 South: Silver Spring, College Park
2.8 mi · 4 min
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12
Merge slight right onto Capital Beltway
7.3 mi · 10 min · Capital Beltway
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13
Take the exit slight right toward MD 650 South: New Hampshire Avenue South, Takoma Park
1571 ft · 41 sec
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14
Turn straight onto New Hampshire Avenue
2137 ft · 56 sec · New Hampshire Avenue
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15
Turn left onto Adelphi Road
3045 ft · 1 min · Adelphi Road
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16
Turn right onto Edwards Way
745 ft · 20 sec · Edwards Way
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17
Turn right onto Riggs Road
596 ft · 14 sec · Riggs Road
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18
Arrive at your destination
0 m · 1 sec · Riggs Road
Car Route Details
A richer read on the saved driving route between Frederick and Adelphi.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Eisenhower Memorial Highway
Merge slight left onto Eisenhower Memorial Highway
21.6 mi · 00h 27m
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.
Partly Cloudy leaving Frederick and Partly Cloudy near Adelphi.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Frederick to Adelphi?
The road trip is about 42.9 miles (69.1 km) and usually takes 01h 00m 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?
Gaithersburg is a useful midpoint, sitting about 21.5 miles from Frederick and 21.5 miles from Adelphi.
How much longer is the road route than the straight-line distance?
The direct path is about 36.8 miles (59.3 km), while the road route adds roughly 6.1 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 4:30 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $6.21 one way or $12.42 round trip. Estimated CO2 is about 13.5 kg one way.
What should you check before leaving?
Before you leave, expect Partly Cloudy around Frederick and Partly Cloudy near Adelphi.
Stop Ideas Near Gaithersburg
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Griffith Park at City Hall
Gaithersburg City Hall
City of Rockville City Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Gaithersburg.
Rockville station
Washington Union Station
Frederick Airport, MD
Frederick, MD
Flight Path Map
This map shows the direct air route between Frederick and Adelphi. Straight-line distance: 36.85 mi (59.31 km).
#1 Frederick
The second most populous city in Frederick County, Maryland.
| Population | 73,308 |
| Coordinates | 39.4142700, -77.4105400 |
| Altitude | 87 |
| Country | United States |
#2 Adelphi
Census designated place in Prince George's County, Maryland, United States
| Population | 15,086 |
| Coordinates | 39.0031700, -76.9719200 |
| Altitude | 52 |
| Country | United States |
End: Adelphi (-76.97192, 39.00317)
Estimated Travel Time
Distance: 69 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 25m |
| 40 mph (64.37 km/h) | 01h 04m |
| 50 mph (80.47 km/h) | 00h 51m |
| 60 mph (96.56 km/h) | 00h 42m |
| 70 mph (112.65 km/h) | 00h 36m |
| 80 mph (129 km/h) | 00h 32m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $6.21 | $12.42 |
| Mid-grade | $4.60 | $6.99 | $13.98 |
| Premium | $4.95 | $7.53 | $15.06 |
| Diesel | $5.98 | $9.09 | $18.18 |
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 Maryland · Apr 15, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.