$100 Find Cheap Flights from Chicago to San Antonio - Compare and Save

These are the earliest and latest flight times available from Chicago to San Antonio:

• Earliest: departs at 8:50 am and lands at 11:59 am
• Latest: departs at 11:00 pm and lands at 2:09 am.

The flight takes about 3h 09m.

Two cabin classes are available on flights from Chicago to San Antonio:

• Economy Class
• First Class

A nonstop flight from Chicago to San Antonio takes 3h 09m, covering 1,045 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 Chicago to San Antonio range from $339 to $508, with an average of $401 over the past 12 months. Anything below $339 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 62% above the $401 route average. Book 19 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $215 round-trip via Denver Intl (DEN), compared to $407 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

Morning is the busiest departure period on Chicago to San Antonio flights, with 38% of flights leaving in that window. Afternoon departures account for 25%, evening flights for 25%, and night flights for 12%.

Two airlines offer in-flight Wi-Fi on Chicago to San Antonio flights:

• American Airlines
• JetBlue

Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty program; others are paid add-ons priced by flight length.

One-way fares from Chicago to San Antonio are currently lower than usual. Average one-way flight prices are about $140, which is 46% below the typical average for this route.

San Antonio Airport (SAT) hosts 5 major car rental companies, with daily rates averaging $53 for economy cars. Top options include:

• Europcar
• Fox
• Dollar
• Hertz
• Alamo

Flights from Chicago to San Antonio may depart from several airports in Chicago area, including Chicago Midway (MDW), Chicago O'Hare Intl (ORD) and Chicago Greater Rockford (RFD). Flights usually arrive at San Antonio (SAT).

One-stop flights from Chicago to San Antonio most commonly connect through:

• Denver Intl (DEN) - 27% of one-stop connections
• Las Vegas Harry Reid Intl (LAS) - 19% of one-stop connections
• Chicago O'Hare Intl (ORD) - 15% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 14% of one-stop connections

Yes. Flexible dates can save you up to 22% on flights from Chicago to San Antonio. Thursday is the cheapest departure day at $388 round-trip on average, while Sunday is the most expensive at $494, a difference of $106.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

3 airlines operate flights between Chicago and San Antonio. The airlines offering nonstop flights on this route include:

• American Airlines
• United Airlines
• Southwest

Flying via Houston Hobby (HOU) gives the shortest average 1-stop total travel time at 4h 23m, compared with 4h 42m via Nashville Intl (BNA) and 5h 07m 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 Chicago to San Antonio flights:

• United Airlines: offers extra legroom; offers free seat selection
• American Airlines: offers extra legroom; offers free seat selection
• 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:

• United Airlines: a cabin bag and a checked bag in Economy Class
• American Airlines: a cabin bag and a checked bag in Economy Class
• Southwest: 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.

SAT is connected to the public bus system, and VIA bus route 5 provides regular services between the airport and downtown San Antonio. SuperShuttle also offers door-to-door shuttle services from SAT to downtown San Antonio and the surrounding neighborhoods. You can get tickets from Terminal A's baggage claim area. Taxis are also available at SAT, and you'll find them on the lower levels of Terminals A and B, around baggage claim. If you wish to self-drive, take a rental car from Terminal A's baggage claim area.

SAT is a fully accessible airport. The airport has provided ramps and elevators for barrier-free access. PRM also get accessible restrooms, wheelchair services, fast-track services, and reserved parking spots. Low-vision passengers at ORD will have free Air services, braille signage, and tactile guide paths. TTY telephones and visual paging services are available for the hard-of-hearing.

MDW has provided private spaces for nursing mothers to feed their babies. These rooms include a sink, a wash area, and comfortable seating. You'll find the nursing rooms on Concourse C beside the yoga room. Also available at MDW are the baby changing facilities, which are provided in all washrooms. The airport has provided a special family lane for parents traveling with kids for quicker transition. Additionally, most airport restaurants offer kid menus and high chairs for babies.

Air France, American Airlines, Swiss Air, Delta, and United Airlines have lounges at ORD. You can access these lounges by paying at the door, except for the Delta lounge, which is a members-only lounge. The Swiss Air and Air France lounges are in Terminal 5 airside. American Airlines has several locations, Concourses G, L, and H/K. The Delta lounge is in Terminal 2 near Gate E6, while United Club has several locations around Concourses B, C, and F.