Cheap flights from Michigan to San Antonio from $89

If you aren’t able to travel during the month of September, then book flights to San Antonio from Michigan during October instead. Flights to San Antonio in October, while not as cheap as those in September, still average around $395.

The cheapest day to depart on your flight to San Antonio is on a Wednesday when prices can be found for as low as $419. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Sunday is $537.

According to our data, the cheapest time of day to fly to San Antonio is at noon. momondo users have found flights departing from Michigan to San Antonio at noon for as low as $454. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to San Antonio are more costly in the morning, with an average ticket price of $478. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Detroit Metropolitan Wayne County to San Antonio for the best Michigan - San Antonio flight prices

You are more likely to see cheaper flights to San Antonio from Michigan when booking weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $456 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from Michigan for as low as $388 on momondo.

There are 4 cabin classes available to choose from on Michigan to San Antonio flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Frontier, American Airlines, and Delta are the most popular carriers operating from Michigan to San Antonio

Delta, American Airlines and United Airlines are the top three most popular airlines that fly to San Antonio from Michigan according to our data. Delta is the first choice among our users, with 52% of people opting to fly with this airline when traveling to San Antonio. Keep in mind that there are 6 different airlines that fly to San Antonio on a routine basis, so you have a few additional options to choose from.

The number of flights available between Michigan and San Antonio is 26 per day as of August 2026. The most frequent departure time is 8:00PM, with 42% of daily flights leaving in the evening.

188 flights are operational weekly from Michigan to San Antonio as of August 2026. The most popular departure day for this route is Mon, with 21% of flights per week taking off on this day.