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Find cheap flights from San Diego to Illinois from $63

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 Diego to Illinois departing on 7/17. 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
Thu 7/11
Thu 7/18

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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$118
Moline
Moline1 stop$418
Peoria
Peoria1 stop$598
Bloomington
Bloomington1 stop$257
St. Louis
St. Louis1 stop$140

Good to know

Low season

January

High season

June

Cheapest flight

$63
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly with an average 8% increase in price.
Flight from San Diego to St. Louis

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from San Diego 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 Diego to Illinois.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Illinois from San Diego 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 Diego 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 Diego with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Diego 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 Diego 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 Diego to the following destinations at these prices or less: Chicago $204 one-way - $416 round-trip
  • Morning departure is around 50% cheaper 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 Diego to Illinois

Need help choosing which airline to fly with from San Diego 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 10277 reviews
7.9Comfort
8.2Boarding
7.4Food
8.6Crew
8.0Entertainment
Airline reviews

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

4.0 OkayBrooke, Jun 2024SFO - MSP
Read more about Delta reviews

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

There was a loud squeaky sound the whole time we were flying.

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

I didn’t not like that I could not select my seat and ended up with the worse seat.

The landing was bad and the hostess came two times and i was sleeping but when she served the person that nexts to me I woke up and she didn’t even asked me if I need any drink or snacks two times!!!!

Plane was late because of a mechanical malfunction and the food listed as available was not. Flight attendants seem over worked and under paid. They just done seem happy. And that can be seen in their faces.

Waited 3 hours on a plane to de-ice due to manpower issues. Waited another hour and a half once we landed because of a gate issue. Missed my connections. Created. A total of 13 hours of delay.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

They put me on a chair in between two men, one overweight who was almost falling on top of me, and the other was even uncomfortable because I was half falling because of what the other was pushing me. I stayed with. my feet were swollen from fluid retention and from being unable to accommodate myself. it was very uncomfortable. I asked for help but they told me that the flight was full and they couldn't help me. I got off the plane almost unable to walk due to the inflammation. and then at FLL airport I asked for help because I couldn't go to my next flight, which was a connection.

The walk from baggage claim to the taxi is very difficult for older people I will never fly into JFK again. It is physically challenging

Overall fine but both ways for this trip was delayed.

Flight was delayed by almost 5 hours. Suitcase was not loaded despite the flight being near empty (my colleagues’ suitcases did reach JFK, unlike mine). Had to argue on phone to get JetBlue to deliver the case to my hotel. Never again

The flight was excellent. The crew was welcoming and attentive.

Great! I love Jet Blue. My favorite airline! Very efficient, clean and timely.

Run out of snack choices. Why are the seats not padded for your butt? Are we sitting on blocks of wood or metal for $250-300 a pop? This ain’t spirit. Let’s get it together people

We were told that our flight would be delayed for 90+ minutes because of weather, so we went to get something to eat only to have them randomly start boarding 15 minutes after the announcement, with no warning.

Entertainment... No earphones passed out. Many including me couldn't use the TV. Legroom was good. Crew was indifferent and a bit surly. Free wifi was a nice convenience. Check in desk location was unknown. Gate number on the boarding passes was wrong.

Going through JFK’s security is a mess. The TSA security said no shoes on the bins. So, we place our shoes in the belt and they came out all over the belt. Boarding was delayed and Flight as well.

It is a modern tragedy that any airline expects you to travel for 14 hours in such discomfort and that the only way to add comfort is exorbitant prices. I was in pain by the time we landed. Shameful.

After the morning frenzy of 35 min wait through CLT security at 4;30 AM, it was nice to have a smooth pleasant boarding experience. This 6:30 AM flight was not full. We were able to get seated swiftly and took off promptly. Nice touch they distributed the old fashioned headsets with 8 mm jacks. Snacks were decent and arrival was uneventful.

I had a great flight. Everything went smoothly and the flight arrived early.

The flight and boarding were easy peasy. I was traveling with my 4-year-old, so a smooth boarding experience was especially appreciated. My only piece of feedback is really about where our gate was in O'Hare. They've shoved four gates into a tiny corner of the B terminal and there isn't early enough room or seating for everyone. Not United's problem, but did dent the overall experience.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

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 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!

The flight was delayed several times without explanation. The seats were terribly uncomfortable and wifi isn’t included. All these make for a less than ideal flight.

Internet service was erratic. Crew service was poor and slow. My luggage on this non-stop flight was lost and not recovered

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

Horrible - they lied to me about baggage & boarding, even though I specifically spoke to their agents the day before my flight about my issue. When I showed up they did not let me board and stranded me at my airport until I bought a new flight with money I did not have to spend.

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

I love air Canada. The staff is so helpful and friendly and attentive. I paid for extra room but chose a ser near a person who took up a lot of space which gave me less space than regular economy, I was sad I did that!

No meal. Flight crew was wonderful, happily finding me storage for my guitar. THANK YOU!!!

Flight was delayed for almost 3 hours. Communication of gate change was poor. Email and screen said one gate and it was a different gate from that. Gate changed first to 64 B and then to 64 C. Originally it was 68B. 64C was not communicated properly!

Plenty of room in the exit row. Sat on the plane an hour before taking off.☹️ Landed late and had to wait for gate availability.

Flight was on time early arrival better entertainment good staff.everything was excellent

They canceled the flight on us very close to the flight date .

My experience was pretty frustrating because the first leg of my flight on United (though booked through Air Canada) was delayed causing me to miss my connecting flight on Air Canada. This could have been an easy solve as there was a direct flight later that morning via Air Canada that they easily could have put me on which would have only gotten me to my destination 2 1/2 hours later but because United and Air Canada don’t seem to have good communication they gave me the run around both telling me to talk with the other which I did three times to no avail. I ended up taking the delayed flight and getting on a new connecting flight which ended up getting me to my destination 6 hours later and I missed the event I was planning to go to this evening.

Everything went smoothly and as expected. We were on time and one flight arrived early.

This is not a Business Class equipped airplane and even the crew apologize before take over BUT BUT Air Canada charged full business class fare

Very good other than we have to wait for one crew and we’re delayed and the pilot and his co- pilot has to make a difference to be right on time arrival. Disappointed about no food service also.

Book cheap flights from San Diego to Illinois

Recent round-trip flight deals

8/22Thu
1 stopSpirit Airlines
13h 33mSAN-ORD
8/26Mon
1 stopSpirit Airlines
12h 57mORD-SAN
$118
8/23Fri
1 stop
6h 06mSAN-ORD
8/26Mon
1 stop
12h 57mORD-SAN
$130
8/13Tue
1 stopFrontier
10h 57mSAN-ORD
8/20Tue
1 stopFrontier
7h 29mORD-SAN
$131
9/6Fri
1 stopFrontier
6h 06mSAN-ORD
9/10Tue
1 stopFrontier
7h 29mORD-SAN
$132
9/3Tue
nonstopUnited Airlines
4h 04mSAN-ORD
9/7Sat
nonstopUnited Airlines
4h 20mORD-SAN
$145
9/11Wed
nonstopUnited Airlines
4h 04mSAN-ORD
9/14Sat
1 stopUnited Airlines
6h 13mORD-SAN
$150
10/18Fri
1 stopDelta
6h 41mSAN-ORD
10/22Tue
1 stopDelta
7h 03mORD-SAN
$236
9/20Fri
1 stopDelta
6h 47mSAN-STL
9/23Mon
1 stopDelta
7h 59mSTL-SAN
$246
8/27Tue
2 stopsAmerican Airlines
8h 24mSAN-STL
8/30Fri
1 stopAmerican Airlines
6h 50mSTL-SAN
$292
6/29Sat
1 stopAmerican Airlines
8h 18mSAN-STL
7/5Fri
1 stopAmerican Airlines
6h 25mSTL-SAN
$301

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Recent one-way flight deals

7/17Wed
1 stopFrontier
5h 20mSAN-STL
$63
7/17Wed
nonstopFrontier
5h 20mSAN-STL
$65
10/25Fri
1 stopAmerican Airlines
5h 24mSAN-STL
$114
8/10Sat
nonstopUnited Airlines
4h 11mSAN-ORD
$118
8/29Thu
1 stopDelta
8h 09mSAN-MDW
$130
7/17Wed
2 stopsAlaska Airlines
14h 52mSAN-STL
$159
7/25Thu
2 stopsAlaska Airlines
10h 39mSAN-STL
$169
7/31Wed
nonstopUnited Airlines
4h 11mSAN-ORD
$196
7/10Wed
nonstopAmerican Airlines
4h 18mSAN-ORD
$200
10/18Fri
1 stopDelta
8h 30mSAN-MDW
$214

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Last minute flights from San Diego to Illinois

Last minute flight, train and bus deals

6/13Thu
multi-stopFrontier
11h 40mSAN-STL
6/15Sat
multi-stopFrontier
14h 16mSTL-SAN
$175
6/13Thu
multi-stopFrontier
11h 40mSAN-STL
6/21Fri
multi-stopFrontier
15h 24mSTL-SAN
$180
6/15Sat
multi-stopSpirit Airlines
12h 02mSAN-ORD
6/19Wed
multi-stopSpirit Airlines
16h 38mORD-SAN
$253
6/15Sat
multi-stopSpirit Airlines
12h 02mSAN-ORD
6/18Tue
multi-stopSpirit Airlines
14h 38mORD-SAN
$257
6/15Sat
multi-stopUnited Airlines
7h 14mSAN-ORD
8/6Tue
nonstopUnited Airlines
4h 18mORD-SAN
$480
6/15Sat
nonstopAmerican Airlines
4h 16mSAN-ORD
8/2Fri
nonstopAmerican Airlines
4h 28mORD-SAN
$503
6/16Sun
nonstopAmerican Airlines
4h 08mSAN-ORD
8/3Sat
nonstopAmerican Airlines
4h 28mORD-SAN
$514
6/12Wed
multi-stopDelta
7h 16mSAN-MDW
6/19Wed
multi-stopDelta
7h 04mMDW-SAN
$654
6/12Wed
multi-stopDelta
8h 43mSAN-MDW
6/16Sun
multi-stopDelta
8h 34mMDW-SAN
$655
6/14Fri
multi-stopUnited Airlines
7h 21mSAN-STL
6/16Sun
multi-stopUnited Airlines
13h 22mSTL-SAN
$753

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San Diego - Illinois Flights

Departure:

San Diego (SAN)United States

Return flight deals:

Illinois - San Diego

Cabin classes:

$468
$877
$794
$297