How far is Roma, TX from San Antonio, TX?
The driving distance from Roma, TX to San Antonio, TX is about 249.9 miles (402.2 km), with a travel time of about 03h 55m by car.
- The straight-line flight distance is about 211 miles (339.6 km).
- For a round trip, plan for roughly 07h 50m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 03h 55m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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 Texas, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Roma and San Antonio.
Turn-by-Turn Driving Directions
Step-by-step road directions between Roma and San Antonio.
-
1
Start on North Grant Street
79 m · 8 sec · North Grant Street
-
2
Turn left onto East Franklin Avenue
90 m · 18 sec · East Franklin Avenue
-
3
Turn left onto North Garcia Street
12.5 mi · 14 min · North Garcia Street
-
4
Continue on United States Highway 83
54.3 mi · 1 hr 1 min · United States Highway 83
-
5
Continue on North US Highway 83
14.2 mi · 16 min · North US Highway 83
-
6
Continue on South Zapata Highway
5.4 mi · 8 min · South Zapata Highway
-
7
Turn left onto South Meadow Avenue
2.1 mi · 5 min · South Meadow Avenue
-
8
Turn left onto Guadalupe Street
1 mi · 2 min · Guadalupe Street
-
9
Continue on Houston Street
1856 ft · 48 sec · Houston Street
-
10
Turn right onto San Dario Avenue
85 m · 6 sec · San Dario Avenue
-
11
Continue on Purple Heart Trail
144.4 mi · 2 hr 27 min · Purple Heart Trail
-
12
Continue on South Pan Am Expressway
9.3 mi · 11 min · South Pan Am Expressway
-
13
Keep slight left to continue on South Pan Am Expressway
2835 ft · 40 sec · South Pan Am Expressway
-
14
Take the exit slight right toward Spur 536: South Alamo Street
619 ft · 15 sec
-
15
Turn straight onto South Laredo Street
2093 ft · 46 sec · South Laredo Street
-
16
Continue on South Santa Rosa Street
2386 ft · 52 sec · South Santa Rosa Street
-
17
Turn right onto Dolorosa Street
1445 ft · 33 sec · Dolorosa Street
-
18
Arrive at your destination
0 m · 1 sec · Dolorosa Street
Car Route Details
A richer read on the saved driving route between Roma and San Antonio.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
Purple Heart Trail
Continue on Purple Heart Trail
144 mi · 02h 27m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Mostly Cloudy leaving Roma and Chance Showers And Thunderstorms near San Antonio.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Roma to San Antonio?
The road trip is about 249.9 miles (402.2 km) and usually takes 03h 55m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Cactus is a useful midpoint, sitting about 123 miles from Roma and 126.9 miles from San Antonio.
How much longer is the road route than the straight-line distance?
The direct path is about 211 miles (339.6 km), while the road route adds roughly 38.9 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 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 9:10 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $33.33 one way or $66.66 round trip. Estimated CO2 is about 78.4 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around Roma and Chance Showers And Thunderstorms near San Antonio.
Flight Path Map
This map shows the direct air route between Roma and San Antonio. Straight-line distance: 211.02 mi (339.6 km).
#1 Roma
City in Starr County, Texas, United States of America
| Population | 11,476 |
| Coordinates | 26.4050600, -99.0158600 |
| Altitude | 65 |
| Country | United States |
#2 San Antonio
The seventh most populous city in the United States and the center of the San Antonio metropolitan area.
| Population | 1,567,118 |
| Coordinates | 29.4241200, -98.4936300 |
| Altitude | 198 |
| Country | United States |
End: Dolorosa Street (-98.493645, 29.424163)
Estimated Travel Time
Distance: 402 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 19m |
| 40 mph (64.37 km/h) | 06h 14m |
| 50 mph (80.47 km/h) | 04h 59m |
| 60 mph (96.56 km/h) | 04h 09m |
| 70 mph (112.65 km/h) | 03h 34m |
| 80 mph (129 km/h) | 03h 07m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $33.33 | $66.66 |
| Mid-grade | $4.25 | $37.50 | $75.01 |
| Premium | $4.59 | $40.49 | $80.99 |
| Diesel | $3.99 | $35.22 | $70.44 |
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 Texas · Apr 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.