Route guide
Cheap Flights from Denver to San Antonio: Book Airline Tickets
- Distance
- about 800 mi
- Typical flight time
- 1 h 45 min – 2 h 45 min
- Airports
- 1 × 1
- Time difference
- 1 h ahead
This page covers the practical side of flying between Denver and San Antonio: which airports to compare, how long the trip takes, and when it is busy. It works for either direction. For a price on your dates, ask a specialist.
Quick answer: Denver to San Antonio is about 800 miles (1,290 km) and a typical flight takes 1 h 45 min to 2 h 45 min. San Antonio is 1 hour ahead of Denver. Denver has 1 airport to compare and San Antonio has 1.
Airport pairs to compare
Denver's airport lies on the plains northeast of the city, roughly 25 miles from downtown, so ground transport time matters. San Antonio's airport is north of downtown and straightforward to use.
| Pair | Departure airport | Arrival airport |
|---|---|---|
| DEN to SAT | Denver International | San Antonio International |
About the airports
- DEN · Denver International
Sits roughly 25 miles northeast of downtown, with a commuter rail line to Union Station. - SAT · San Antonio International
The main airport, north of downtown.
Airlines with a major base at either end
- At Denver: United Airlines, Southwest Airlines
Airlines with a base at one end often connect through their hub. A specialist can compare nonstop and connecting options on your dates.
When to go and what to expect
Denver
Ski season (roughly late November through April) and summer are the busiest periods. Winter storms can disrupt flights, and spring snow is not unusual.
San Antonio
Spring and fall are the most comfortable seasons. Summers are hot, and winters are mild.
How long is Denver to San Antonio?
At about 800 miles, Denver to San Antonio is a short-to-medium flight. Fares on routes this length are sensitive to the day of the week and the time of day, so check a few departure times before you settle.
Time zones and timing
San Antonio is 1 hour ahead of Denver, so you land at a local time 1 hour later than departure time plus flight time would suggest. Plan your arrival day around local time at the destination.
Getting between the airport and town
Denver: The A Line commuter train runs from the airport to Union Station downtown. Shuttles and rental cars serve the mountains.
San Antonio: Rental cars, taxis and ride-hail are the most common ways into the city. City buses also serve the airport.
Planning ground transport too? See our car rental guide.
Good to know
- If you are heading to a ski area, allow extra time on mountain roads in winter, and watch the forecast before travel day.
- Thunderstorms in spring and summer can cause delays, so leave extra connection time in those seasons.
- Compare the total with bags included, not just the base fare. See baggage fees and taxes and fees.
Flying San Antonio to Denver?
This route guide works in both directions. For other trips, see all flights from Denver or all flights from San Antonio.
Frequently asked questions
How far is Denver from San Antonio?
The straight-line distance between the main airports is about 800 miles (1,290 km). Routes can be longer in practice because of air traffic and weather.
How long is a flight from Denver to San Antonio?
A typical scheduled flight takes roughly 1 h 45 min to 2 h 45 min in the air, depending on winds, the aircraft and the airports. Connecting itineraries take longer, and nonstop availability depends on the airline and dates.
Which airports can I use?
At Denver: DEN (Denver International). At San Antonio: SAT (San Antonio International). Ask for prices on more than one pairing.
Is there a time difference?
San Antonio is 1 hour ahead of Denver.
When is the best time to fly from Denver to San Antonio?
In Denver: Ski season (roughly late November through April) and summer are the busiest periods. Winter storms can disrupt flights, and spring snow is not unusual. In San Antonio: Spring and fall are the most comfortable seasons. Summers are hot, and winters are mild. Fares are usually highest in the busy periods described for each city, so flexible dates can help.
Which airlines should I compare for Denver to San Antonio?
Airlines with a major base at either end include United Airlines and Southwest Airlines. A specialist compares them with other carriers on your dates, since schedules and availability change.
Do you show fares on this page?
No. Fares change constantly, so we do not publish prices that might be out of date. A specialist checks live availability and confirms the full total, including taxes and bags, before you pay.
Route details updated October 18, 2026.