$89 Find Cheap Flights from San Antonio to St. Louis - Compare and Save

Among airlines operating San Antonio to St. Louis flights:

• Southwest: offers free seat selection

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

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

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

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

• Southwest: a cabin bag in Economy Class class
• JetBlue: a cabin bag in Economy Class class

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

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

• Economy Class
• First Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $242 round-trip via Las Vegas Harry Reid Intl (LAS), compared to $478 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 San Antonio to St. Louis most commonly connect through:

• Dallas/Fort Worth (DFW) - 58% of one-stop connections
• Houston George Bush Intcntl (IAH) - 15% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 11% of one-stop connections
• Houston Hobby (HOU) - 6% of one-stop connections

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

Yes. Being flexible with your travel dates can save you up to 21% on the San Antonio to St. Louis route. Tuesday is the cheapest departure day at $391 round-trip on average, while Monday is the most expensive at $491, a difference of $100. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

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

Some of the most popular sights in St. Louis are Downtown St. Louis, Busch Stadium and Enterprise Center. These are among the most viewed places in St. Louis on KAYAK.

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

• Earliest: departs at 6:40 am and lands at 8:46 am
• Latest: departs at 5:05 pm and lands at 7:11 pm.

The flight takes about 2h 06m.

A nonstop flight from San Antonio to St. Louis takes 2h 06m, 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.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $187 to $1,133. That means the highest observed fare was about 6x higher than the lowest one.

One-way fares from San Antonio to St. Louis are currently lower than usual. Average one-way flight prices are about $130, which is 44% below the typical average for this route.

Flying via Dallas Love Field (DAL) gives the shortest average 1-stop total travel time at 3h 57m, compared with 4h 21m via Dallas/Fort Worth (DFW) and 4h 45m via Houston George Bush Intcntl (IAH).

Lambert-St Louis Airport (STL) hosts 5 major car rental companies, with daily rates starting from around $31 for economy cars. Top options include:
· Hertz
· Budget
· Alamo
· Enterprise Rent-A-Car
· Payless

Round-trip flights from San Antonio to St. Louis range from $332 to $535, with an average of $404 over the past 12 months. Anything below $332 counts as a good deal.