San Antonio, United States → Dallas, United States · ✈ 1h · 🚗 6h 36min
219 nautical miles · Time difference: +1h ahead · Direction: north
The distance from San Antonio to Dallas is 406 km (252 miles). The fastest way to travel is by flight. A direct flight takes approximately 1h.
The straight-line distance from San Antonio, United States to Dallas, United States is approximately 406 kilometers (252 miles or 219 nautical miles). This measurement uses the Haversine formula, computing the great-circle distance — the shortest path between two points on Earth's surface.
Dallas is located north of San Antonio. San Antonio is in North America, in the South region of United States, while Dallas is in North America, in South, United States. Both cities are in North America.
| Mode | Distance | Est. Time | Best For |
|---|---|---|---|
| ✈️ Flight | 406 km | ~1h | Quick but may not save time with airport procedures |
| 🚗 Drive | ~528 km | ~6h 36min | Feasible with breaks |
| 🚂 Regular Train | ~487 km | ~4h 4min | Budget-friendly option |
Our recommendation: flight is typically the best way to travel from San Antonio to Dallas. At this distance, driving gives you the most flexibility and avoids airport overhead.
Based on an estimated road distance of 528 km, fuel costs for driving from San Antonio to Dallas are approximately $42–$79 USD (at $0.08–$0.15 per km, depending on vehicle efficiency and local fuel prices). Additional costs may include tolls, parking, and accommodation for longer trips.
San Antonio sits at 29.4241°N, 98.4936°W, while Dallas is located at 32.7767°N, 96.7970°W. The initial compass bearing from San Antonio to Dallas is 23° (NNE), so a great-circle flight path leaves San Antonio heading roughly NNE. Because the Earth is curved, the actual heading shifts gradually along the route — pilots and navigation systems update it continuously instead of holding a single fixed compass bearing.
The latitude difference is 3.35° and the longitude difference is 1.70°. Each degree of latitude represents about 111 km, which is one reason cross-latitude routes feel longer even when the map looks similar to east–west journeys.
The geographic midpoint between San Antonio and Dallas is approximately 31.1032°N, 97.6603°W. This is the great-circle halfway position — the spot where you would be exactly 203 km from each city. For road trips, a stop near this latitude/longitude makes for a natural overnight or lunch break.
Dallas is roughly 1 hour ahead of San Antonio. When it is 09:00 in San Antonio, it is approximately 10:00 in Dallas. Daylight saving time can shift the offset by an hour during certain months, so confirm the exact difference for your specific travel dates.
San Antonio is a major city in United States with a population of approximately 1,547,253. Located in the South region, it is an important hub in North America. San Antonio is a significant metropolitan area in United States with good domestic and international transport connections.
Dallas is a notable city in United States with a population of approximately 1,343,573. Situated in the South region, it serves as a key destination in North America. Dallas offers solid transport connections and a variety of arrival options as a major city in United States.
→ See all distances from Dallas
406 km is a medium-distance route, similar to traveling across a mid-sized European country. A flight covers this distance quickly, but driving or rail travel remains feasible for those who prefer ground transport. For reference, New York to Chicago is about 1,150 km.
At 406 km, the San Antonio-Dallas route is about 1.0% of Earth's circumference. A commercial jet covers this distance in about 1h.
At just 406 km within United States, the San Antonio–Dallas corridor is well-suited for a day trip or weekend getaway. Consider driving for flexibility, or check regional rail connections for a hassle-free journey.
The straight-line distance from San Antonio to Dallas is approximately 406 kilometers (252 miles, 219 nautical miles).
A direct flight takes approximately 1h, based on 800 km/h cruising speed plus 30 minutes for takeoff and landing.
Estimated driving time is approximately 6h 36min, based on 80 km/h average speed and roads being ~30% longer than straight-line distance.
Dallas is approximately +1h ahead compared to San Antonio.
The estimated road distance is approximately 528 km, which is about 30% longer than the 406 km straight-line distance.
📍 Data: Coordinates from OpenStreetMap contributors. Distances calculated using the Haversine formula. Travel times are estimates only. Last verified: May 30, 2026.