Cheap flights from San Antonio to Illinois from $81
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Antonio to Illinois departing on 6/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Spirit Airlines flights from San Antonio to Illinois
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How to get the cheapest flight ticket from San Antonio to Illinois
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Illinois?
The cheapest month to fly to Illinois from San Antonio is in April. Flight prices, which tend to average around $254, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of April, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $352.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from San Antonio to Illinois is on a Thursday when prices can be found for as low as $455. Flights from San Antonio to Illinois on a Sunday will generally be more expensive and average around $817. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from San Antonio to Illinois during this time can be as low as $278. Flights at noon are often more expensive with an average ticket price of $848.
What is the cheapest San Antonio to Illinois flight route?
Fly from San Antonio to Chicago O'Hare Intl for the best San Antonio - Illinois flight prices
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from San Antonio when booking 18 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $405 when searching 18 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from San Antonio for as low as $318 on momondo.
What cabin class options are available on San Antonio to Illinois flights?
There are 4 cabin classes available to choose from on San Antonio to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from San Antonio to Illinois?
Spirit Airlines, Frontier, and Delta are the most popular carriers operating from San Antonio to Illinois
What airlines fly to Illinois?
American Airlines, United Airlines and Southwest are the top three most popular airlines that fly to Illinois from San Antonio according to our data. American Airlines is the first choice among our users, with 60% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 6 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from San Antonio to Illinois on average per day?
13 flights are operational daily from San Antonio to Illinois as of April 2025. The most popular departure time for this route is 5:00AM, with 61% of flights per day taking off in the afternoon.
How many flights depart from San Antonio to Illinois on average per week?
The number of flights available between San Antonio and Illinois is 92 per week as of April 2025. The most frequent departure day is Thu, with 32% of weekly flights leaving on this day.
Cheap San Antonio to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from San Antonio to Illinois
When did momondo last update prices for flights from San Antonio Airport to Illinois?
Prices for flights from San Antonio Airport to Illinois are updated daily.
How many operators does momondo search for flights from San Antonio Airport to Illinois?
The number of operators available for flights from San Antonio Airport to Illinois is 6 as of April 2025.
How old do you have to be to fly from San Antonio Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from San Antonio to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from San Antonio to Illinois is Boeing 737-800 (21.41% of total bookings). The next most popular plane models are Airbus A319 (16.02%), Airbus A320-100/200 (9.24%), and Boeing 737 MAX 8 (8.62%).
Best airlines flying from San Antonio to Illinois
Compare and see reviews for airlines that fly from San Antonio to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $111 | Free Cancellation | Rating 6.3 7,889 reviews | |||
| PriceFrom $112 | Free Cancellation | Rating 5.9 3,276 reviews | |||
| PriceFrom $222 | Free Cancellation | Rating 8.0 4,274 reviews | |||
| PriceFrom $226 | Free Cancellation | Rating 7.4 8,616 reviews | |||
| PriceFrom $243 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $258 | Free Cancellation | Rating 8.0 7,897 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from San Antonio to Illinois?
It is quick and easy to find San Antonio to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.
Can I find flights from San Antonio to Illinois with flexible booking policies on momondo?
Flights from San Antonio to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from San Antonio to Illinois?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from San Antonio.
I’m not ready to book a flight from San Antonio to Illinois right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of San Antonio to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.