$98 Find Cheap Flights from St. Louis to San Antonio - Compare and Save

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

• Earliest: departs at 7:45 am and lands at 10:00 am
• Latest: departs at 10:45 pm and lands at 1:00 am.

The flight takes about 2h 15m.

Two cabin classes are available on flights from St. Louis to San Antonio:

• Economy Class
• First Class

A nonstop flight from St. Louis to San Antonio takes 2h 15m, covering 786 miles.

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.

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.

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

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

Morning is the busiest departure period on St. Louis to San Antonio flights, with 50% of flights leaving in that window. Night departures account for 50%, afternoon flights for 0%, and evening flights for 0%.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $141 to $1,128. That means the highest observed fare was about 8x higher than the lowest one.

JetBlue is the only airline on the St. Louis to San Antonio route offering in-flight Wi-Fi. Pricing depends on fare class.

One-way fares from St. Louis to San Antonio are currently lower than usual. Average one-way flight prices are about $168, which is 25% below the typical average for this route.

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

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

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

• Dallas/Fort Worth (DFW) - 39% of one-stop connections
• Houston George Bush Intcntl (IAH) - 34% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 13% of one-stop connections
• Dallas Love Field (DAL) - 9% of one-stop connections

Yes. Flexible dates can save you up to 33% on flights from St. Louis to San Antonio. Saturday is the cheapest departure day at $287 round-trip on average, while Sunday is the most expensive at $428, a difference of $141.

Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

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

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 46m via Houston George Bush Intcntl (IAH).

Some of the most popular sights in San Antonio are San Antonio River Walk, SeaWorld San Antonio and Alamodome. These are among the most viewed places in San Antonio on KAYAK.

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.

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
• JetBlue: a cabin bag in Economy Class class

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