How far is Gwynn Oak, MD from Adelphi, MD?
The driving distance from Gwynn Oak, MD to Adelphi, MD is about 30.6 miles (49.2 km), with a travel time of about 00h 47m by car.
- The straight-line flight distance is about 27.2 miles (43.8 km).
- For a round trip, plan for roughly 01h 35m 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 47m.
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.
Locality in Howard and Anne Arundel counties, Maryland, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Driving Route Map
The map below follows the saved road route between Gwynn Oak and Adelphi.
Turn-by-Turn Driving Directions
Step-by-step road directions between Gwynn Oak and Adelphi.
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1
Start on the route
18 m · 6 sec
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2
Turn right onto Haddon Avenue
54 m · 12 sec · Haddon Avenue
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3
Turn left onto Hillsdale Road
1.5 km · 3 min · Hillsdale Road
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4
Turn slight right onto West Forest Park Avenue
1.4 mi · 4 min · West Forest Park Avenue
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5
Continue on Ingleside Avenue
2.8 mi · 6 min · Ingleside Avenue
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6
Continue on Bloomsbury Avenue
1.5 km · 2 min · Bloomsbury Avenue
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7
At the end of the road, turn left onto South Rolling Road
1.4 km · 2 min · South Rolling Road
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8
Continue on South Rolling Road
1657 ft · 39 sec · South Rolling Road
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9
Turn left onto I 195 East
1.2 km · 47 sec
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10
Take the exit slight right toward I 95 South: Washington
2757 ft · 1 min
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11
Merge slight left
17.2 mi · 20 min
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12
Take the exit slight right toward MD 212 West: Calverton
3254 ft · 43 sec
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13
Turn straight onto Powder Mill Road
2.4 mi · 4 min · Powder Mill Road
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14
Turn straight onto Riggs Road
1.8 mi · 3 min · Riggs Road
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15
Arrive at your destination
0 m · 1 sec · Riggs Road
Car Route Details
A richer read on the saved driving route between Gwynn Oak and Adelphi.
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 95 South
Merge slight left
17.2 mi · 00h 20m
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.
Sunny leaving Gwynn Oak and Sunny near Adelphi.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Gwynn Oak to Adelphi?
The road trip is about 30.6 miles (49.2 km) and usually takes 00h 47m 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?
Jessup is a useful midpoint, sitting about 15.3 miles from Gwynn Oak and 15.3 miles from Adelphi.
How much longer is the road route than the straight-line distance?
The direct path is about 27.2 miles (43.8 km), while the road route adds roughly 3.4 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 4:54 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.41 one way or $8.83 round trip. Estimated CO2 is about 9.6 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Gwynn Oak and Sunny near Adelphi.
Stop Ideas Near Jessup
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City of Bowie
Baltimore City Hall
Town Hall Liquor And Bar
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Jessup.
BWI Rail Station
Pennsylvania Station
New Carrollton station
Rockville station
Flight Path Map
This map shows the direct air route between Gwynn Oak and Adelphi. Straight-line distance: 27.23 mi (43.83 km).
#1 Gwynn Oak
A census-designated place in Baltimore County, Maryland.
| Population | 47,092 |
| Coordinates | 39.3326100, -76.6927500 |
| Altitude | 130 |
| 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: 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 | $4.09 | $4.41 | $8.83 |
| Mid-grade | $4.60 | $4.97 | $9.93 |
| Premium | $4.95 | $5.35 | $10.70 |
| Diesel | $5.98 | $6.46 | $12.92 |
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 21, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.