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Find cheap flights from San Antonio to Illinois from $70

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Antonio to Illinois departing on 5/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 6/15
Sat 6/22

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Best Illinois Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Chicago
Chicago1 stop$106
Moline
Moline1 stop$262
Peoria
Peoria1 stop$328
Bloomington
Bloomington1 stop$268
Champaign
Champaign1 stop$307
Springfield
Springfield2 stops$544
St. Louis
St. Louis1 stop$149

Good to know

Low season

February

High season

June

Cheapest flight

$70
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from San Antonio to Chicago O'Hare Airport

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from San Antonio to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Antonio to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Antonio to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Illinois from San Antonio is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Antonio to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Illinois with an airline and back to San Antonio with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Antonio to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Illinois from San Antonio up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from San Antonio to the following destinations at these prices or less: Chicago $198 one-way - $396 round-trip
  • Morning departure is around 14% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from San Antonio to Illinois

 
Need help choosing which airline to fly with from San Antonio to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 10673 reviews
8.6Crew
7.4Food
7.9Comfort
8.0Entertainment
8.2Boarding
Airline reviews

5-hour delay due to storms in Tanoa and airspace restricted by Miami traffic controllers.

6.0 GoodGary, May 2024MSP - TPA
Read more about Delta reviews

5-hour delay due to storms in Tanoa and airspace restricted by Miami traffic controllers.

A regional sized plane was used for a cross country flight with no overhead bin space. I had to "pink check" my laptop and my medications. I was NOT pleased!!!!

Absolutely nothing flight was cancelled and delayed for 2 days. Barely a heads up I want a full refund

The plane from SNA wouldn’t start after 5 tries. The team gave me an option of flying direct from LAX and giving me a Lyft ride there! Perfect!

Best airline! Always friendly and welcoming. Skyclub was great and loved the fast free wifi on board. I also love that you can pre-order your meal on the app!

Atlanta boarding crew at gate were filled with arrogance and were disrespectful. In flight crew showed indifference to the needs of passengers. This is about the flight from ATL to BDL.

Boarding was somewhat chaotic. Unable to evaluate crew or food/drink because captain kept them seated due to turbulence. Have no idea if entertainment was offered.

On my way home I had a layover. The flight from ATL to CLT was amended 5x while I was waiting. I could have driven home sooner. Overall from Dallas, Tx to Charlotte, NC I started my trip at 4:30pm, I didn’t get home until past midnight. I know things happen, but 5x to make me run back and forth in an airport from different terminals is excessive. I also upgraded to comfort + , I didn’t feel it was worth it. There was no benefit

On my way home I had a layover. The flight from ATL to CLT was amended 5x while I was waiting. I could have driven home sooner. Overall from Dallas, Tx to Charlotte, NC I started my trip at 4:30pm, I didn’t get home until past midnight. I know things happen, but 5x to make me run back and forth in an airport from different terminals is excessive.

I usually have a positive experience with Delta. Complimentary upgrades are always nice!

The plane was dirty and the in seat air wasn't blowing as planes usually do.

I was told we'd have a hot breakfast option in first class, so I chose not get a hot breakfast. It was a very strange meal, but the fresh fruit was very good quality. Service was excellent from ORD to ELP. No service from MBS to ORD, not even water. However, when flying American from FNT to ORD, which is a shorter flight, they at least pass out snacks and offer water.

The delays (5 hrs) were a comedy of errors, and the multiple safety issues encountered were very concerning.

The customer service was excellent! Check-in, baggage check-in, boarding, the flight went very smooth.

The flight was delayed instead of leaving at 11 it left at 12.20

United WiFi is consistently unusable (it can take 10 mins to load a single web page). If you need Wifi to do work, be prepared to lose half a day of productivity.

Good movies, iffy pay WiFi, food ok- on time though and that was great!

Awful…flight was delayed more than 12hrs, missed all connections to Fort Wayne, IN, had to get flight to another city 2 hours from my destination, flight was again delayed by 40 mins because they did not have enough fuel, again missed a connection, finally arrived in Indiana at 11pm…but before my 2 hour drive home, ay, no Five That Our Luggage Never Made On The plane and Still In Chicago

Boarding was friendly and quick. While the plane model was older with no live tv, the entertainment was full of movies and tv shows. All food was available. Pilots were very communicative with status of the flight. Flight landed on time.

Flight was delayed by over an hour and gate checked bags took 15 minutes to be delivered to the jet bridge.

The CX617 from HK to BKK was delayed more than 1.5 hours.

This flight is frequently delayed. The connections seemingly are more frequently delayed. I’ve missed connections as a result twice on the same route to charlotte then Charleston. Final destination arrival has been the next day, twice in a row. No pilots, no crew. Too many excuses. Unfortunately, my days with American are over.

Entertainment was okay not because anything was wrong but it is a short flight so having no wifi is annoying but understandable. Crew was outstanding as usual

Those seats were way too narrow. I had the middle seat, one person was a very skinny person and we still couldn’t avoid touching each other anytime one of us moved. The other person was larger and we were basically sitting in each others lap the entire flight. There was zero entertainment. The flight was long enough to justify tvs, but no. Gotta sit there in your infant seat and twiddle your thumbs.

Flight was fine. It took an unusually long time to have baggage delivered to the carousel in ORD.

Average - flew with Jet Blue internal and it was far more comfortable and better food and entertainment. Notable difference

The flight got canceled due to mechanical issues, and he to be rebooked and missed my appointments for that day

The flight was scheduled to depart DCA at 12:30 pm but was delayed twice on the ground so that we were finally scheduled to depart at around 4:00 pm. Once we boarded, it was announced that takeoff would be delayed again to fix a hydraulic problem which delayed our eventual takeoff until around 5:00 pm. Once we departed, it was a smooth flight back to ORD. We did not get any explanation about what caused the original significant delay. In my experience, this happens frequently with AA.

The only problem experienced was a ground stop in Chicago due to weather. But the crew handled everything professionally. They prioritized rebooking those passengers who had connecting flights and then deplaning the other passengers. When the hold was lifted, they efficiently re-boarded all the passengers so that we could depart before our departure limit expired.

Our second leg to Jackson WY was unable to land due to weather. We were flown back to Dallas after stopping in SLC. We were given hotel rooms and vouchers. We were told that we would be back on the same plane in the morning. Instead we were given a different flight with different seats. Not a good experience. No one knew what was going on.

Crew was nice, explained emergency protocol very well. Flight took off and arrived on time. Pilot explained the small delay that occurred with docking and providing updates. I would definitely fly spirit again.

I had no legroom, although I paid for extra legroom. I could barely put my bag in front of my feet and under the seat. The Wi-Fi was horrible. In fact the flight attendant said that they had to reboot it and see if it was going to work and never did.

The seat are terrible. Don’t even think of sleeping on a Spirit flight. The kids that run the plane aka flight attendants are pretty rude and straight forward. They get the job done but without class.

I had a death in my family and booked my flight on Spirit. My flight was cancelled the morning of my flight, no explanation, no help to rebook, nobody to talk to. The next available flight was 2days later !!!! Terrible airline, will NEVER fly with them again!

Terrible as usual!!!! Very unprofessional and rude flight attendants! You get what you pay for! HORRIBLE

They took a horrible route with a lot of turbulence and I eneded up getting sick. Even if the flight takes longer. Don't put people life at risk just to get to the airport on time.

Every thing was fine ,low price,easy on time ,clean, good staff, really no issues

Had to board plan 2x due to lack of security check after 1st boarding

Miserable. The crew was rude, the flight was delayed 5 hours for mechanical reasons and then “weather” even though other planes were leaving.

They kept Changing the flight times. It was delayed several times and at one point it was supposed to depart at 3.40am! At which point we ended up staying overnight and booked long a separate United flight for early morning departure. The spirit flight then got moved up and left at 1.30 in the morning when it was supposed to leave at 9.40pm the night before.

Check in online was easy. Seats aren’t very comfortable

Fecal matter in seat back pocket. Presumably from a kids diaper.

Worst airline to travel with. They treat you like a prisoner in a jailhouse barking out orders and threats. Nickle and dime you to the same price or higher than a respectable airline like one of the big 3 . Might as well fly with standard airlines

Well I mean u get what u pay for so 🤷‍♂️

Over an hour delay in departure but I was notified beforehand. Another delay on tarmac upon arrival at LGA. We ended up departing the plane almost 2 hours later than expected

I fly Frontier because it’s affordable. I understand that the seats are tight and not the most comfortable…but that’s part of it. The problem with this flight was that there was a group of travelers directly behind me at the back of the plane who were ridiculously loud and obnoxious the entire flight. I’m pretty sure they were drunk and I could periodically smell an odd odor that I believe was one of them using a smokeless vape pen. The stewards had to remind them to keep quiet during the pre-flight instruction, but that was it. They never said another thing to them for the rest of the flight. It was a miserable.

I checked a bag because it was $5 less than carry on. They managed to lose my bag on a 2.5 hr direct flight! Frontier has no airport staff at baggage claim to help. As soon as I got home around 11 pm I tried to use their online system to file the claim for lost bag - system wouldn't take the # on my baggage claim ticket - said it was not the correct number. Also said that I had not checked a bag, which wasn't true - even my online boarding pass showed that I had checked a bag. Wasted about an hour on that process with no luck. Tried again in the morning - same thing. So tried online chat with Frontier bot - waited 35-40" twice to be connected to a baggage agent and it never happened. Eventually drove to PDX after work and waited 2 hrs for the Frontier ticket agents to arrive prior to the next Frontier flight out of PDX and FINALLY got some help from one of them, to take me to lost luggage area where I was able to retrive my bag. Probably took 4-5 hrs. of my time and endless frustration to get my bag. This was my first -- and LAST -- experience flying Frontier Airlines. Check-in was also extremely difficult and time consuming. The flight itself (and staff) were fine but everything else about the experience was a total disaster! The fact that Frontier literally has NO WAY to connect to a human voice for customer service (in this case for lost luggage) is the WORST!!!!!

Didn't like anything!! Horrible flight. Small seating area and hard seats. Butt was sore after 2 hour flight to Seattle No entertainment or free refreshments No wifi or USB charging receptacles to charge phone entoute like other airliners Luggage rates were 3 times as much as competitors. Difficult to navigate online luggue process to pre pay before flight Overall bad experience WILL NEVER RIDE OR RECOMMEND FRONTIER TO FRIENDS OR FAMILY MEMBERS!!! THIS IS A SHAME!! MOST MESERIBLE FLIGHT OF MY LIFE!! AND I THOUGHT SPIRIT WAS 👎 YOU GOT THEM BEAD HANDS DOWN!!

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

Flight cancelled and was told by a rude gate agent that they don’t accommodate on other airlines. Had to wait 5 hours for a connecting flight that had a 7 hour layover. Would not allow bags to be checked early so we couldn’t go through security .Had to rent a car for the afternoon to store bags and get a meal. Also incurred a hotel fee. No apology or reason given for the cancellation- just rudeness.

Book cheap flights from San Antonio to Illinois

Recent round-trip flight deals

9/10Tue
1 stopSpirit Airlines
10h 50mSAT-ORD
9/17Tue
1 stopSpirit Airlines
13h 47mORD-SAT
$106
9/11Wed
1 stopSpirit Airlines
10h 50mSAT-ORD
9/16Mon
1 stopSpirit Airlines
29h 48mORD-SAT
$134
5/29Wed
1 stopFrontier
11h 02mSAT-MDW
6/4Tue
1 stopFrontier
21h 00mMDW-SAT
$143
9/4Wed
1 stopFrontier
15h 38mSAT-STL
9/9Mon
1 stopFrontier
22h 15mSTL-SAT
$149
6/12Wed
1 stopAmerican Airlines
6h 48mSAT-MLI
6/15Sat
1 stopAmerican Airlines
4h 29mMLI-SAT
$262
5/29Wed
nonstopAmerican Airlines
2h 47mSAT-ORD
7/1Mon
1 stopAmerican Airlines
7h 49mORD-SAT
$263
8/24Sat
1 stopDelta
5h 05mSAT-BMI
8/27Tue
1 stopDelta
5h 00mBMI-SAT
$268
5/29Wed
1 stopDelta
7h 25mSAT-MDW
6/3Mon
1 stopDelta
5h 19mMDW-SAT
$322
9/7Sat
1 stopUnited Airlines
7h 07mSAT-PIA
9/11Wed
1 stopUnited Airlines
5h 33mPIA-SAT
$328
9/7Sat
2 stopsUnited Airlines
9h 31mSAT-PIA
9/11Wed
1 stopUnited Airlines
5h 33mPIA-SAT
$333

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Recent one-way flight deals

5/25Sat
1 stopFrontier
10h 12mSAT-ORD
$70
6/6Thu
1 stopFrontier
8h 08mSAT-ORD
$75
5/21Tue
2 stopsSpirit Airlines
23h 19mSAT-ORD
$77
5/21Tue
3 stopsSpirit Airlines
24h 24mSAT-ORD
$90
5/28Tue
1 stopAmerican Airlines
4h 42mSAT-MLI
$113
10/29Tue
1 stopAmerican Airlines
5h 10mSAT-STL
$130
6/11Tue
1 stopDelta
7h 28mSAT-MDW
$176
7/7Sun
1 stopDelta
7h 09mSAT-MDW
$213
9/16Mon
2 stopsUnited Airlines
14h 35mSAT-STL
$260
11/8Fri
2 stopsUnited Airlines
23h 37mSAT-ORD
$274

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Last minute flights from San Antonio to Illinois

Last minute flight, train and bus deals

5/21Tue
multi-stop
14h 05mSAT-STL
5/28Tue
multi-stop
9h 39mSTL-SAT
$157
5/20Mon
multi-stopFrontier
29h 08mSAT-ORD
5/28Tue
multi-stopFrontier
21h 49mORD-SAT
$213
5/21Tue
multi-stopSpirit Airlines
26h 03mSAT-ORD
5/29Wed
multi-stopSpirit Airlines
7h 31mORD-SAT
$224
5/21Tue
multi-stopSpirit Airlines
24h 24mSAT-ORD
5/23Thu
multi-stopSpirit Airlines
14h 07mORD-SAT
$288
5/18Sat
multi-stopDelta
4h 48mSAT-STL
5/21Tue
multi-stopDelta
5h 12mSTL-SAT
$498
5/21Tue
nonstopUnited Airlines
2h 51mSAT-ORD
5/30Thu
nonstopUnited Airlines
2h 52mORD-SAT
$531
5/21Tue
nonstopUnited Airlines
2h 47mSAT-ORD
5/30Thu
multi-stopUnited Airlines
6h 45mORD-SAT
$536
5/18Sat
multi-stopDelta
5h 44mSAT-STL
5/21Tue
multi-stopDelta
6h 07mSTL-SAT
$546
5/17Fri
multi-stopAmerican Airlines
6h 29mSAT-STL
5/19Sun
multi-stopAmerican Airlines
9h 51mSTL-SAT
$643
5/21Tue
nonstopAmerican Airlines
2h 47mSAT-ORD
5/23Thu
nonstopAmerican Airlines
2h 52mORD-SAT
$660

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San Antonio - Illinois Flights

Departure:

San Antonio (SAT)United States

Return flight deals:

Illinois - San Antonio

Cabin classes:

$667
$1,520
$666
$280