Cheap flights from San Antonio to Detroit from $124

The cheapest month to fly to Detroit from San Antonio is in June. Flight prices, which tend to average around $379, are often lower during this time because this is during the off-season. If you’re not able to fly to Detroit in June, then August is your next best option. Flight prices from San Antonio to Detroit during August average around $399.

On average, the least expensive day to fly to Detroit from San Antonio is on a Saturday. momondo users have found tickets for Saturday departures for as low as $459. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from San Antonio to Detroit for around $642.

In the morning is the cheapest time of day to fly from San Antonio to Detroit when you can find flight prices for as low as $484. Flying to Detroit in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $635 on average. Flights to Detroit from San Antonio in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You are more likely to see cheaper flights to Detroit from San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to Detroit for around $443 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Detroit from San Antonio for as low as $277 on momondo.

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

You could potentially save up to 13% on your flight if you consider stops on a San Antonio to Detroit flight.

As of September 2026, prices for San Antonio to Detroit flights are approximately 21% cheaper when compared to flights at the same time last year.

Frontier, Southwest, and Delta are the most popular carriers operating from San Antonio to Detroit

Delta, Frontier and Southwest are the top three most popular airlines that fly to Detroit from San Antonio according to our data. Delta is the first choice among our users, with 84% of people opting to fly with this airline when traveling to Detroit. Keep in mind that there are 4 different airlines that fly to Detroit on a routine basis, so you have a few additional options to choose from.

Dallas (DFW) was the most common stop: 33% of momondo users choosing 1-stop flights on this route connected there.

Flights via St. Louis (STL) offer the lowest average round-trip price of $285.

Flights connecting via St. Louis (STL) have the shortest average one-way travel time: 4h 25m.

St. Louis (STL) has the shortest average layover time for this route: 0h 43m.

As of September 2026, 7 flights take off from San Antonio and land in Detroit each day. The most common flight departure time for this route is 5:00AM, with 47% of daily flights taking off in the morning.

The number of flights available between San Antonio and Detroit is 55 per week as of September 2026. The most frequent departure day is Fri, with 25% of weekly flights leaving on this day.