Route guide
Cheap Flights from Chicago to San Antonio: Book Airline Tickets
- Distance
- about 1,040 mi
- Typical flight time
- 2 h 15 min – 3 h 15 min
- Airports
- 2 × 1
- Time difference
- None
This page covers the practical side of flying between Chicago and San Antonio: which airports to compare, how long the trip takes, and when it is busy. It works for either direction. For a price on your dates, ask a specialist.
Quick answer: Chicago to San Antonio is about 1,040 miles (1,670 km) and a typical flight takes 2 h 15 min to 3 h 15 min. There is no time difference. Chicago has 2 airports to compare and San Antonio has 1.
Airport pairs to compare
Chicago has two main airports: O'Hare handles hub and long-haul traffic, while Midway is smaller and closer to the city center. San Antonio's airport is north of downtown and straightforward to use.
| Pair | Departure airport | Arrival airport |
|---|---|---|
| ORD to SAT | O'Hare International | San Antonio International |
| MDW to SAT | Midway International | San Antonio International |
About the airports
- ORD · O'Hare International
A major hub for connecting traffic and long-haul flights, with a direct train to downtown. - MDW · Midway International
Closer to downtown and served by its own train line, with a focus on shorter domestic routes. - SAT · San Antonio International
The main airport, north of downtown.
Airlines with a major base at either end
- At Chicago: United Airlines, American Airlines, Southwest Airlines
Airlines with a base at one end often connect through their hub. A specialist can compare nonstop and connecting options on your dates.
When to go and what to expect
Chicago
Late spring through early fall is the most pleasant stretch. Winter brings snow and cold that can cause delays.
San Antonio
Spring and fall are the most comfortable seasons. Summers are hot, and winters are mild.
How long is Chicago to San Antonio?
At about 1,040 miles, Chicago to San Antonio is a short-to-medium flight. Fares on routes this length are sensitive to the day of the week and the time of day, so check a few departure times before you settle.
Getting between the airport and town
Chicago: CTA trains run from both airports to the city center, which is usually the most predictable option at busy times.
San Antonio: Rental cars, taxis and ride-hail are the most common ways into the city. City buses also serve the airport.
Planning ground transport too? See our car rental guide.
Good to know
- Check every airport pairing when you compare fares. Schedules and airline options can differ between them.
- Winter weather is the main source of disruption. Build in extra buffer for connections between November and March.
- Thunderstorms in spring and summer can cause delays, so leave extra connection time in those seasons.
- Compare the total with bags included, not just the base fare. See baggage fees and taxes and fees.
Flying San Antonio to Chicago?
This route guide works in both directions. For other trips, see all flights from Chicago or all flights from San Antonio.
Frequently asked questions
How far is Chicago from San Antonio?
The straight-line distance between the main airports is about 1,040 miles (1,670 km). Routes can be longer in practice because of air traffic and weather.
How long is a flight from Chicago to San Antonio?
A typical scheduled flight takes roughly 2 h 15 min to 3 h 15 min in the air, depending on winds, the aircraft and the airports. Connecting itineraries take longer, and nonstop availability depends on the airline and dates.
Which airports can I use?
At Chicago: ORD (O'Hare International), MDW (Midway International). At San Antonio: SAT (San Antonio International). Ask for prices on more than one pairing.
Is there a time difference?
There is no time difference.
When is the best time to fly from Chicago to San Antonio?
In Chicago: Late spring through early fall is the most pleasant stretch. Winter brings snow and cold that can cause delays. In San Antonio: Spring and fall are the most comfortable seasons. Summers are hot, and winters are mild. Fares are usually highest in the busy periods described for each city, so flexible dates can help.
Which airlines should I compare for Chicago to San Antonio?
Airlines with a major base at either end include United Airlines, American Airlines and Southwest Airlines. A specialist compares them with other carriers on your dates, since schedules and availability change.
Do you show fares on this page?
No. Fares change constantly, so we do not publish prices that might be out of date. A specialist checks live availability and confirms the full total, including taxes and bags, before you pay.
Route details updated October 18, 2026.