Cheap flights from Chicago to San Antonio

Chicago FSS
CHI
San Antonio
SAT

Flight deals from Chicago to San Antonio

Below you can see the best deals on flights Chicago — San Antonio for upcoming dates. Direct and connecting flights from various airlines — compare prices and choose the right ticket.

The lowest price for the next 2 months is on 15 September, from $126.

Top 10 cheap flights from Chicago to San Antonio

F9
F9
$ 125

Chicago — San Antonio

06:30—19:25
15 Sep 2026
12 h 55 m
1 stop
F9
F9
$ 130

Chicago — San Antonio

06:30—19:25
16 Sep 2026
12 h 55 m
1 stop
F9
F9
$ 136

Chicago — San Antonio

06:30—19:25
23 Sep 2026
12 h 55 m
1 stop
F9
F9
$ 137

Chicago — San Antonio

06:30—19:25
22 Sep 2026
12 h 55 m
1 stop
F9
F9
$ 137

Chicago — San Antonio

06:30—19:25
19 Sep 2026
12 h 55 m
1 stop
F9
F9
$ 139

Chicago — San Antonio

06:30—19:25
14 Sep 2026
36 h 55 m
1 stop
F9
F9
$ 146

Chicago — San Antonio

06:30—19:25
17 Sep 2026
12 h 55 m
1 stop
DL
DL
$ 153

Chicago — San Antonio

17:10—22:44
22 Sep 2026
5 h 34 m
1 stop
DL
DL
$ 153

Chicago — San Antonio

09:29—15:53
22 Sep 2026
6 h 24 m
1 stop
DL
DL
$ 153

Chicago — San Antonio

08:55—15:53
22 Sep 2026
6 h 58 m
1 stop

Prices were found in the last 72 hours and may change — check the exact price when you continue.

About the Chicago — San Antonio flight

Looking for cheap flights from Chicago to San Antonio? Compare fares from different airlines, check the flight schedule and travel time — and book your Chicago — San Antonio ticket online at the best price.

The route has direct flights — around 82 flights per week, flights are operated by United Airlines, American Airlines, Alaska Airlines, Air Canada, a nonstop flight takes about 2 h 50 min, the distance between the cities is around 1,693 km.

Planning your trip? You may find our San Antonio travel guide, how to get from the airport into town and San Antonio weather forecast useful. To catch a low fare, use the low-price calendar and the monthly price chart on this page.

Facts about this route

from $126Min. price
SeptemberCheapest
AugustPeak season
YesDirect flights
1,693 kmDistance
2 h 50 minTravel time
4Airlines
82 / wkFlights

Flight schedule from Chicago to San Antonio

The table shows direct flights from Chicago to San Antonio on the selected date. The flight takes approximately 2 h 50 min. Regular flights are operated by United Airlines, American Airlines, Alaska Airlines and Air Canada. Departures from O'Hare International Airport, Chicago Midway International Airport and Midway International Airport airports, arrivals at San Antonio International Airport.

For each flight, the following details are shown: departure time (local), arrival city and airport, flight number and airline, terminal or gate, and status. Click on a flight to open its details and go to ticket search. To view flights on a different day, change the date above the table.

Today
Any time
Last update: 25 Aug 2026

Flight ticket prices by day: Chicago — San Antonio

Below is a calendar of the lowest flight ticket prices for Chicago — San Antonio by day. Pick a convenient date and instantly see the fare. The cheapest flights on this route start from $126 in September, and the most expensive are around $194 in August. If your travel dates are flexible, the calendar will help you find the best price for your preferred period. To view round-trip fares, switch to the "Round trip" tab above the calendar, select your departure date — and the right-hand calendar will highlight the lowest prices for return flights on each day.

 
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Prices by month

Average one-way fares from Chicago to San Antonio by month. Tickets are usually cheapest in January (around $133) and priciest in June (about $204) — use the table and chart below to pick the best time to fly.

MonthAverage priceLevelMonthAverage priceLevelMonthAverage priceLevel
Jan$133lowMay$190highSep$142low
Feb$137lowJun$204highOct$147low
Mar$156mediumJul$194highNov$166medium
Apr$199highAug$171mediumDec$185high

Some values are estimated based on seasonality.

When to fly

Weather in San Antonio: it is warmest in August (up to 36 °C on average) and coolest in January (around 18 °C). The driest month is July.

Tickets are usually cheapest in September and most expensive in August. Compare prices and weather by month in the charts below to pick the best time to fly.

Temperature · San Antonio

Dry and wet days · San Antonio

Wind speed and direction · San Antonio

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How to get the best deal on a Chicago — San Antonio ticket

  • Book ahead: fares for Chicago — San Antonio are usually lower 3–8 weeks before departure than at the last minute.
  • Play with your dates — Tuesday, Wednesday and Saturday departures are often cheaper than Friday and Sunday.
  • Chicago is served by more than one airport — compare fares and travel time to each before you book.
  • The cheapest month to fly to San Antonio is usually September — plan your trip around it if your dates are flexible.
  • Compare direct and connecting flights: nonstop is faster, while a connection is sometimes noticeably cheaper.
  • Watch the low-price calendar and the monthly price trend on this page — they make it easier to catch a good date.
  • Travelling light? Pick a cabin-baggage-only fare — tickets without checked luggage are noticeably cheaper.
  • Get to the airport in good time — about 2–3 hours before an international departure and roughly an hour before a domestic one.

Airlines

Flights on the Chicago — San Antonio route are operated by 4 airlines; United Airlines runs the most flights (around 56% of all flights). Compare carriers, flight shares and schedules below.

  • United AirlinesUA
    15x/week
    WebsiteFleet: 956165M pax/year
    • Direct flight ORD → SAT15x/week
      Duration
      3h 7m
      Days
      MTWTFSS
    56.1%Open →
  • American AirlinesAA
    9x/week
    WebsiteFleet: 965211M pax/year
    • Direct flight ORD → SAT9x/week
      Duration
      2h 48m
      Days
      MTWTFSS
    34.1%Open →
  • Alaska AirlinesAS
    2x/week
    WebsiteFleet: 31545M pax/year
    • Direct flight ORD → SAT2x/week
      Duration
      2h 47m
      Days
      MTWTFSS
    8.5%Open →
  • Air CanadaAC
    1x/week
    WebsiteFleet: 20346M pax/year
    • Direct flight ORD → SAT1x/week
    1.2%Open →

Cities and airports on the Chicago — San Antonio route

Flights Chicago — San Antonio depart from O'Hare International Airport, Chicago Midway International Airport, Midway International Airport and Chicago Rockford International Airport and arrive at San Antonio International Airport. Below are pages for the cities, countries, and airports on the route: airlines, schedules, and travel guides.

Departure

Chicago

CHI
United States
About the cityHow to get thereWeatherAll about the country United States
Arrival

San Antonio

SAT
United States
About the cityHow to get thereWeatherAll about the country United States
Departure airports
Arrival airports

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Frequently asked questions about the Chicago — San Antonio flight

How long is the flight from Chicago to San Antonio?

A nonstop Chicago — San Antonio flight takes about 2 h 50 min — the distance between the cities is around 1,693 km.

How far is it from Chicago to San Antonio?

The distance from Chicago to San Antonio is about 1,693 km, which a nonstop flight covers in around 2 h 50 min.

Are there direct flights from Chicago to San Antonio?

Yes, there are nonstop flights Chicago — San Antonio — around 82 flights per week.

Which airlines fly from Chicago to San Antonio?

Airlines operating Chicago — San Antonio include United Airlines, American Airlines, Alaska Airlines, Air Canada. See the full list with schedules in the "Airlines" section on this page.

Which airports do Chicago — San Antonio flights use?

Flights from Chicago depart from O'Hare International Airport, Chicago Midway International Airport, Midway International Airport, and arrive at San Antonio International Airport. If a city has more than one airport, check which one your ticket uses before you travel.

How much is a ticket from Chicago to San Antonio?

The price of a Chicago — San Antonio ticket depends on your travel date, season and demand: it is usually cheapest to fly in September, and most expensive in August. Tickets typically cost between $126 and $194. Check the current lowest fare and low-price calendar on this page.

When is the best time to book flights Chicago — San Antonio?

Flights Chicago — San Antonio are usually cheaper when booked in advance — a few weeks before departure and away from peak dates; the most budget-friendly month to fly is September. Compare prices by month in the price trend chart on this page.

How can I find the cheapest flights from Chicago to San Antonio?

To catch a low fare Chicago — San Antonio, book a few weeks in advance, keep your dates flexible, and compare airlines and connecting options. The low-price calendar and monthly price chart on this page show the cheapest days and months at a glance: the most budget-friendly month to fly is usually September.

How early should I arrive at the airport?

For international flights, plan to be at the airport about 2–3 hours before departure, and around an hour before a domestic flight. Allow extra time during busy travel seasons and at large hubs, where check-in and security lines can be longer.

Where else you can fly from Chicago

See all
New York CityTorontoDetroitWashington, D.C.AtlantaMinneapolisLos AngelesSeattleBostonDallasHoustonOrlandoDenverLondonNashvilleIndianapolisSan DiegoMontrealMilwaukeeSt. LouisCharlottePhiladelphiaColumbusKansas CityMiamiPhoenixLas VegasCincinnatiGrand RapidsDes MoinesRaleighSan FranciscoMadisonDaytonGreen BayTampaPittsburghLouisvilleKnoxvilleRochester

Where else you can fly from San Antonio

See all
DallasLos AngelesHoustonAtlantaLas VegasDenverPhoenixMinneapolisMexico CitySalt Lake CityDetroitCharlotteSeattleMonterreyOrlandoNew York CityPhiladelphiaGuadalajaraMiamiWashington, D.C.Fort LauderdaleSan JuanCancunBostonTorontoQuerétaroSan FranciscoLeonTampaSan Luis PotosíBrownsvilleManhattanLafayette

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