$110 Find Cheap Flights from St. Louis to San Antonio - Compare and Save

Among airlines operating St. Louis to San Antonio flights:

• Southwest: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Only Southwest operates flights between St. Louis and San Antonio.

Flights from St. Louis to San Antonio usually depart from Lambert-St Louis (STL) and arrive at San Antonio (SAT).

Here are some options for this route, based on selected ticket types and cabin classes:

• Southwest: a cabin bag and a checked bag in Economy Class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Only Economy Class is available on flights from St. Louis to San Antonio.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $281 round-trip via Denver Intl (DEN), compared to $439 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$90 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 737-800 Passenger/BBJ2 (winglets) family is used most often on this route, operated mainly by Southwest. Other aircraft seen on the route include Boeing 737 MAX 8 variants.

One-stop flights from St. Louis to San Antonio most commonly connect through:

• Dallas/Fort Worth (DFW) - 38% of one-stop connections
• Houston George Bush Intcntl (IAH) - 34% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 14% of one-stop connections
• Dallas Love Field (DAL) - 9% of one-stop connections

Dallas/Fort Worth (DFW) handles the largest share of one-stop connections on this route.

On the St. Louis to San Antonio route, being flexible with your departure day can save you up to 33%. Saturday is the cheapest day at $287 round-trip on average, while Sunday is the most expensive at $428: a $141 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

Some of the most popular sights in San Antonio are San Antonio River Walk, SeaWorld San Antonio and Henry B. González Convention Center. These are among the most viewed places in San Antonio on KAYAK.

A nonstop flight from St. Louis to San Antonio takes 2h 11m, covering 786 miles.

These are the earliest and latest flight times available from St. Louis to San Antonio:

• Earliest: departs at 7:45 am and lands at 9:56 am
• Latest: departs at 9:50 pm and lands at 12:01 am.

The flight takes about 2h 11m.

Last-minute fares on this route - booked within 2 weeks of departure - run 52% above the route average of $373. Book 21 weeks before departure for the lowest fares.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $256 to $1,175. That means the highest observed fare was about 5x higher than the lowest one.

One-way fares from St. Louis to San Antonio are currently lower than usual. Average one-way flight prices are about $154, which is 31% below the typical average for this route.

Flying via Dallas Love Field (DAL) gives the shortest average 1-stop total travel time at 4h 04m, compared with 4h 25m via Dallas/Fort Worth (DFW) and 4h 44m via Houston George Bush Intcntl (IAH).

San Antonio Airport (SAT) hosts 5 major car rental companies, with daily rates starting from around $22 for economy cars. Top options include:
· Europcar
· Fox
· Dollar
· Hertz
· Alamo

Round-trip flights from St. Louis to San Antonio range from $305 to $476, with an average of $373 over the past 12 months. Anything below $305 counts as a good deal.