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Find cheap flights from San Antonio to Illinois from $52

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 5/22. 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 6/8
Sat 6/15

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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$127
Moline
Moline1 stop$281
Peoria
Peoria1 stop$328
Bloomington
Bloomington1 stop$268
Champaign
Champaign1 stop$296
Springfield
Springfield1 stop$361
St. Louis
St. Louis1 stop$118

Good to know

Low season

February

High season

December

Cheapest flight

$52
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from San Antonio to Chicago Midway 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 - $391 round-trip
  • Morning departure is around 22% 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 10778 reviews
8.6Crew
8.0Entertainment
7.9Comfort
7.4Food
8.2Boarding
Airline reviews

The gate area was incredibly short staffed, with one representative manning 4-5 flights, which caused a 3 hr delay in boarding even though the plane was all ready to leave. Other flights also were delayed because of this. The flight crew was awesome and I feel bad for the only gate worker on call, but Delta needs to hire more employees.

2.0 MediocreAnonymous, May 2024AVL - LGA
Read more about Delta reviews

The gate area was incredibly short staffed, with one representative manning 4-5 flights, which caused a 3 hr delay in boarding even though the plane was all ready to leave. Other flights also were delayed because of this. The flight crew was awesome and I feel bad for the only gate worker on call, but Delta needs to hire more employees.

Very frustrated with boarding gate crew. She announced the plane was small and they would be limiting us to one item to carry on. Not a problem for me as I understand the tiny planes have limited space!! Not the case here! It was a rather large plane and had plenty of room for bags! So because I don’t want to be one of “those people” who ignores the request to check a carry on I did so asking if I would be able to pick it up at the bottom of the ramp on arrival in Knoxville to which she responded “yes”! Then I watched as every other passenger held onto their 2 items and boarded!! Then when we arrived in Knoxville our 2 carry ons had been put with all the other luggage and we had to go to baggage pick up and wait for all the big checked bags to come off the carousel! So she lied!! Frustrating. Next time I won’t be so nice!

It was a good experience except when boarding a female flight attendant did not go out of her way to assist my teenage daughters in finding space for their carry-ons after their compartments were full.

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

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!

I didn’t like that I could not select my seat and was assigned a seat when I checked in at LAX

Great experience overall. Check in at Austin was congested as they only have about 6 check in kiosks, one was broken, and there was a lot of Spring Break travelers.

I love the free wifi and headrest screens. I would consider Delta even more because of this but the seats aren't so great. The snacks aren't very good in my opinion. I bought a Bloody Mary and that was great! So just be comfortable with better snacks and the airline world will be yours.

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.

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!!!!!

Frontier is a crappy airline nothing about it is honest

I didn't get to do this flight l, hard to review

Not good 😐 Over priced baggage fees Small hard seats No wifi or entertainment options 😕

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.

I paid for extra leg room. The flimsy plastic seat underneath the floatation seat did not line up with the arm rests. It seemed as if the plastic part was zip tied on but immovable. This caused severe uncomfortable for the duration of the flight.

Plane was clean but they do not allow bag drop until 1 hour before flight. Just encouraging late fees and other issues. The worst I have experienced. Total hostage situation, pay or you miss your flight.

Everything was good, and most importantly on time. They have been extremely tardy in some of my flights

Book cheap flights from San Antonio to Illinois

Recent round-trip flight deals

5/22Wed
1 stop
7h 20mSAT-STL
5/29Wed
1 stop
12h 07mSTL-SAT
$118
5/22Wed
1 stopSpirit Airlines
9h 21mSAT-ORD
5/28Tue
1 stopSpirit Airlines
13h 23mORD-SAT
$127
6/8Sat
1 stopFrontier
6h 28mSAT-MDW
6/15Sat
1 stopFrontier
8h 22mMDW-SAT
$133
6/5Wed
1 stopFrontier
10h 33mSAT-STL
6/12Wed
1 stopFrontier
23h 06mSTL-SAT
$148
8/24Sat
1 stopDelta
5h 05mSAT-BMI
8/27Tue
1 stopDelta
7h 14mBMI-SAT
$268
6/15Sat
1 stopDelta
8h 07mSAT-MLI
6/19Wed
1 stopDelta
6h 42mMLI-SAT
$281
5/25Sat
1 stopAmerican Airlines
8h 15mSAT-MLI
5/28Tue
1 stopAmerican Airlines
8h 02mMLI-SAT
$290
6/4Tue
1 stopAmerican Airlines
7h 05mSAT-CMI
6/11Tue
1 stopAmerican Airlines
7h 31mCMI-SAT
$296
5/25Sat
2 stopsUnited Airlines
8h 12mSAT-MLI
5/28Tue
1 stopUnited Airlines
5h 22mMLI-SAT
$301
9/7Sat
1 stopUnited Airlines
7h 07mSAT-PIA
9/11Wed
1 stopUnited Airlines
5h 33mPIA-SAT
$328

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Recent one-way flight deals

5/22Wed
1 stopFrontier
11h 02mSAT-MDW
$52
5/22Wed
1 stopFrontier
12h 18mSAT-ORD
$55
5/15Wed
1 stopSpirit Airlines
9h 21mSAT-ORD
$63
6/5Wed
2 stopsSpirit Airlines
27h 16mSAT-ORD
$78
5/28Tue
1 stopAmerican Airlines
4h 42mSAT-MLI
$113
5/25Sat
1 stopAmerican Airlines
8h 15mSAT-MLI
$148
5/25Sat
2 stopsUnited Airlines
8h 12mSAT-MLI
$153
7/9Tue
1 stopDelta
7h 29mSAT-MDW
$181
6/2Sun
nonstopUnited Airlines
2h 55mSAT-ORD
$215
7/7Sun
1 stopDelta
7h 29mSAT-MDW
$218

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Last minute flights from San Antonio to Illinois

Last minute flight, train and bus deals

5/14Tue
multi-stopSpirit Airlines
25h 07mSAT-ORD
5/21Tue
multi-stopSpirit Airlines
24h 51mORD-SAT
$236
5/13Mon
multi-stopFrontier
12h 33mSAT-STL
5/17Fri
multi-stopFrontier
11h 38mSTL-SAT
$238
5/13Mon
multi-stop
12h 33mSAT-STL
5/20Mon
multi-stop
8h 36mSTL-SAT
$291
5/11Sat
multi-stop
15h 36mSAT-ORD
5/18Sat
multi-stop
10h 30mORD-SAT
$304
5/11Sat
multi-stopDelta
8h 07mSAT-STL
5/14Tue
multi-stopDelta
8h 02mSTL-SAT
$546
5/14Tue
nonstopUnited Airlines
2h 47mSAT-ORD
5/28Tue
multi-stopUnited Airlines
10h 57mORD-SAT
$555
5/14Tue
nonstopAmerican Airlines
2h 47mSAT-ORD
5/28Tue
nonstopAmerican Airlines
2h 57mORD-SAT
$561
5/11Sat
multi-stopUnited Airlines
4h 58mSAT-STL
5/14Tue
multi-stopUnited Airlines
10h 38mSTL-SAT
$586
5/11Sat
multi-stopDelta
6h 40mSAT-STL
5/14Tue
multi-stopDelta
5h 57mSTL-SAT
$598
5/14Tue
nonstopAmerican Airlines
2h 47mSAT-ORD
5/28Tue
nonstopAmerican Airlines
2h 52mORD-SAT
$616

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San Antonio - Illinois Flights

Departure:

San Antonio (SAT)United States

Return flight deals:

Illinois - San Antonio

Cabin classes:

$718
$767
$1,647
$277