Cheap flights from San Diego (SAN) to Illinois from $39
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/28. 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.
SAN — ORD
May 19 — May 261
From?
To?
1 adult, Economy
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How far in advance should I book a flight from San Diego to Illinois?
Find a great deal and save up to 101% by booking at least 52 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from San Diego to Illinois within the next two weeks, with the cheapest ticket starting at $368.
What is the cheapest month to fly from San Diego to Illinois?
Our data shows that September tends to be the cheapest month to fly to Illinois from San Diego. Users have commonly found prices around $400 for the month, but tickets can be as low as $133. Due to multiple factors, prepare for potentially higher prices in June.
When is the cheapest time to fly from San Diego to Illinois (SAN - IL)?
When flying from San Diego to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Cheap Frontier flights from San Diego to Illinois
Explore cheap flight options specifically provided by Frontier for the route between San Diego and Illinois. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 14, 2024.
Take a look at some of the lowest-priced Frontier flights heading from San Diego to Illinois. Make sure to double check the flight details before booking.
Wed 6/52:52 pmSAN - STL
1 stop5h 15mFrontier
Sat 6/87:29 pmSTL - SAN
1 stop14h 16mFrontier
Deal found 5/13$124
Wed 6/52:52 pmSAN - STL
1 stop5h 15mFrontier
Thu 6/63:32 pmSTL - SAN
1 stop17h 29mFrontier
Deal found 5/14$128
Sat 5/258:21 pmSAN - ORD
1 stop6h 39mFrontier
Mon 5/277:59 pmORD - SAN
1 stop16h 15mFrontier
Deal found 5/13$130
Tue 5/218:04 amSAN - MDW
1 stop7h 08mFrontier
Tue 5/289:10 pmMDW - SAN
1 stop24h 11mFrontier
Deal found 5/13$136
Fri 5/318:21 pmSAN - STL
1 stop11h 52mFrontier
Thu 6/63:32 pmSTL - SAN
1 stop17h 29mFrontier
Deal found 5/13$138
Tue 6/48:21 pmSAN - ORD
1 stop6h 39mFrontier
Wed 6/59:53 pmORD - SAN
1 stop11h 08mFrontier
Deal found 5/13$140
Thu 5/309:53 amSAN - ORD
1 stop13h 13mFrontier
Sat 6/15:56 pmORD - SAN
1 stop15h 08mFrontier
Deal found 5/14$141
Sat 6/88:24 pmSAN - MDW
1 stop6h 57mFrontier
Tue 6/118:02 pmMDW - SAN
1 stop23h 06mFrontier
Deal found 5/14$143
Tue 8/209:30 pmSAN - MDW
1 stop11h 12mFrontier
Tue 8/2710:00 pmMDW - SAN
1 stop23h 41mFrontier
Deal found 5/13$144
Cheap Spirit Airlines flights from San Diego to Illinois
Explore cheap flight options specifically provided by Spirit Airlines for the route between San Diego and Illinois. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 14, 2024.
Browse through some of the cheapest Spirit Airlines flights traveling from San Diego to Illinois. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
Fri 5/317:58 pmSAN - ORD
1 stop8h 42mSpirit Airlines
Tue 6/410:52 pmORD - SAN
1 stop13h 10mSpirit Airlines
Deal found 5/13$114
Thu 5/309:12 pmSAN - ORD
1 stop7h 28mSpirit Airlines
Tue 6/410:52 pmORD - SAN
1 stop13h 10mSpirit Airlines
Deal found 5/13$118
Tue 6/118:29 amSAN - ORD
1 stop13h 21mSpirit Airlines
Tue 6/1810:01 pmORD - SAN
1 stop12h 33mSpirit Airlines
Deal found 5/14$128
Thu 5/309:12 pmSAN - STL
1 stop16h 02mSpirit Airlines
Mon 6/34:05 pmSTL - SAN
1 stop9h 48mSpirit Airlines
Deal found 5/14$129
Tue 5/289:12 pmSAN - ORD
1 stop7h 18mSpirit Airlines
Tue 6/410:52 pmORD - SAN
1 stop13h 10mSpirit Airlines
Deal found 5/13$131
Tue 6/118:29 amSAN - ORD
1 stop13h 21mSpirit Airlines
Tue 6/189:36 amORD - SAN
1 stop11h 17mSpirit Airlines
Deal found 5/13$133
Tue 6/118:29 amSAN - ORD
1 stop13h 21mSpirit Airlines
Tue 6/1810:01 pmORD - SAN
1 stop12h 33mSpirit Airlines
Deal found 5/13$135
Sat 6/811:15 amSAN - ORD
1 stop12h 02mSpirit Airlines
Tue 6/119:36 amORD - SAN
1 stop12h 53mSpirit Airlines
Deal found 5/13$136
Fri 5/317:58 pmSAN - ORD
1 stop8h 42mSpirit Airlines
Wed 6/59:19 amORD - SAN
1 stop15h 08mSpirit Airlines
Deal found 5/13$139
Cheap San Diego to Illinois flights in May & June 2024
Find cheap flight options from San Diego to Illinois specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,632,958 searches. Prices were last updated on May 14, 2024.
These are some of the best deals we've found on flights to Illinois in 2024 at this time. More deals are always being added, so be sure to check back regularly.
Fri 5/317:58 pmSAN - ORD
1 stop8h 42mSpirit Airlines
Tue 6/410:52 pmORD - SAN
1 stop13h 10mSpirit Airlines
Deal found 5/13$114
Thu 5/309:12 pmSAN - ORD
1 stop7h 28mSpirit Airlines
Tue 6/410:52 pmORD - SAN
1 stop13h 10mSpirit Airlines
Deal found 5/13$118
Tue 6/119:19 pmSAN - STL
1 stop13h 46mMultiple Airlines
Thu 6/137:29 pmSTL - SAN
1 stop16h 05mMultiple Airlines
Deal found 5/13$120
Fri 5/318:21 pmSAN - ORD
1 stop6h 49mMultiple Airlines
Tue 6/410:52 pmORD - SAN
1 stop13h 10mMultiple Airlines
Deal found 5/14$122
Wed 6/52:52 pmSAN - STL
1 stop5h 15mFrontier
Sat 6/87:29 pmSTL - SAN
1 stop14h 16mFrontier
Deal found 5/13$124
Sat 6/88:24 pmSAN - ORD
1 stop7h 13mMultiple Airlines
Tue 6/119:36 amORD - SAN
1 stop12h 53mMultiple Airlines
Deal found 5/13$125
Tue 6/119:19 pmSAN - STL
1 stop13h 46mMultiple Airlines
Tue 6/183:47 pmSTL - SAN
1 stop7h 35mMultiple Airlines
Deal found 5/13$129
Sat 5/258:21 pmSAN - ORD
1 stop6h 39mFrontier
Mon 5/277:59 pmORD - SAN
1 stop16h 15mFrontier
Deal found 5/13$130
Tue 5/289:12 pmSAN - ORD
1 stop7h 18mSpirit Airlines
Tue 6/410:52 pmORD - SAN
1 stop13h 10mSpirit Airlines
Deal found 5/13$131
San Diego to Illinois 2024 flight deals
Discover exclusive flight deals for travel between San Diego and Illinois in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 14, 2024.
These are some of the best deals we've found on flights to Illinois in 2024 at this time. More deals are always being added, so be sure to check back regularly.
Fri 5/317:58 pmSAN - ORD
1 stop8h 42mSpirit Airlines
Tue 6/410:52 pmORD - SAN
1 stop13h 10mSpirit Airlines
Deal found 5/13$114
Thu 5/309:12 pmSAN - ORD
1 stop7h 28mSpirit Airlines
Tue 6/410:52 pmORD - SAN
1 stop13h 10mSpirit Airlines
Deal found 5/13$118
Tue 6/119:19 pmSAN - STL
1 stop13h 46mMultiple Airlines
Thu 6/137:29 pmSTL - SAN
1 stop16h 05mMultiple Airlines
Deal found 5/13$120
Fri 5/318:21 pmSAN - ORD
1 stop6h 49mMultiple Airlines
Tue 6/410:52 pmORD - SAN
1 stop13h 10mMultiple Airlines
Deal found 5/14$122
Wed 6/52:52 pmSAN - STL
1 stop5h 15mFrontier
Sat 6/87:29 pmSTL - SAN
1 stop14h 16mFrontier
Deal found 5/13$124
Sat 6/88:24 pmSAN - ORD
1 stop7h 13mMultiple Airlines
Tue 6/119:36 amORD - SAN
1 stop12h 53mMultiple Airlines
Deal found 5/13$125
Tue 6/119:19 pmSAN - STL
1 stop13h 46mMultiple Airlines
Tue 6/183:47 pmSTL - SAN
1 stop7h 35mMultiple Airlines
Deal found 5/13$129
Sat 5/258:21 pmSAN - ORD
1 stop6h 39mFrontier
Mon 5/277:59 pmORD - SAN
1 stop16h 15mFrontier
Deal found 5/13$130
Tue 5/289:12 pmSAN - ORD
1 stop7h 18mSpirit Airlines
Tue 6/410:52 pmORD - SAN
1 stop13h 10mSpirit Airlines
Deal found 5/13$131
Non-stop flights to Illinois from San Diego
Discover non-stop flight options from San Diego to Illinois. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 14, 2024.
For a quicker trip, book one of these direct flights from San Diego to Illinois. Users seeking other options on flights from San Diego to Illinois should update the search form at the top of the page.
Tue 6/410:29 pmSAN - ORD
Nonstop4h 11mUnited Airlines
Wed 6/51:15 pmORD - SAN
Nonstop4h 16mUnited Airlines
Deal found 5/14$369
Wed 8/286:15 amSAN - ORD
Nonstop4h 15mAmerican Airlines
Wed 9/48:20 pmORD - SAN
Nonstop4h 12mAmerican Airlines
Deal found 5/13$370
Sat 8/310:48 pmSAN - ORD
Nonstop4h 16mAmerican Airlines
Sat 8/106:47 pmORD - SAN
Nonstop4h 27mAmerican Airlines
Deal found 5/13$371
Tue 8/611:24 amSAN - ORD
Nonstop4h 16mAmerican Airlines
Sat 8/106:47 pmORD - SAN
Nonstop4h 27mAmerican Airlines
Deal found 5/13$374
Tue 7/26:21 amSAN - ORD
Nonstop4h 16mAmerican Airlines
Tue 7/94:58 pmORD - SAN
Nonstop4h 06mAmerican Airlines
Deal found 5/13$380
Wed 7/311:44 pmSAN - ORD
Nonstop4h 15mAmerican Airlines
Wed 8/710:05 amORD - SAN
Nonstop4h 20mAmerican Airlines
Deal found 5/13$381
Thu 8/291:16 pmSAN - ORD
Nonstop4h 16mAmerican Airlines
Wed 9/48:20 pmORD - SAN
Nonstop4h 12mAmerican Airlines
Deal found 5/13$385
Thu 8/111:19 amSAN - ORD
Nonstop4h 14mAmerican Airlines
Sat 8/36:49 pmORD - SAN
Nonstop4h 28mAmerican Airlines
Deal found 5/14$386
Thu 6/610:52 pmSAN - ORD
Nonstop4h 08mAmerican Airlines
Tue 6/116:39 pmORD - SAN
Nonstop4h 27mAmerican Airlines
Deal found 5/12$389
San Diego to Illinois flights leaving soon
Find last-minute flight options from San Diego to Illinois for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 14, 2024.
Users seeking a last-minute flight from San Diego to Illinois should consider booking one of these fares. Tip: verify your flight details before completing your reservation.
Tue 5/218:04 amSAN - MDW
1 stop7h 08mFrontier
Tue 5/289:10 pmMDW - SAN
1 stop24h 11mFrontier
Deal found 5/13$136
Sun 5/1911:38 amSAN - STL
1 stop20h 35mFrontier
Sun 5/2611:22 pmSTL - SAN
1 stop9h 42mFrontier
Deal found 5/14$138
Tue 5/288:04 amSAN - MDW
1 stop25h 05mFrontier
Fri 5/319:10 pmMDW - SAN
1 stop24h 11mFrontier
Deal found 5/13$140
Tue 5/218:04 amSAN - MDW
1 stop7h 08mFrontier
Wed 5/295:01 amMDW - SAN
1 stop28h 03mFrontier
Deal found 5/13$148
Wed 5/2210:11 amSAN - ORD
1 stop13h 02mFrontier
Mon 5/277:59 pmORD - SAN
1 stop16h 15mFrontier
Deal found 5/13$154
Tue 5/218:04 amSAN - MDW
1 stop7h 08mFrontier
Thu 5/237:35 amMDW - SAN
1 stop9h 50mFrontier
Deal found 5/13$155
Tue 5/218:41 amSAN - ORD
1 stop12h 48mSpirit Airlines
Wed 5/299:36 amORD - SAN
1 stop12h 46mSpirit Airlines
Deal found 5/13$157
Tue 5/288:21 pmSAN - MDW
1 stop7h 29mFrontier
Tue 6/46:00 amMDW - SAN
1 stop9h 39mFrontier
Deal found 5/13$159
Tue 5/218:04 amSAN - MDW
1 stop25h 05mFrontier
Fri 5/249:10 pmMDW - SAN
1 stop24h 11mFrontier
Deal found 5/14$160
One-way flights to Illinois from San Diego
Search for one-way flight options from San Diego to Illinois. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 14, 2024.
Take a look at some of the one-way flights we've detected from San Diego to Illinois. Users can also find round-trip San Diego to Illinois flights by using the search form above.
Tue 5/289:12 pmSAN - STL
1 stop11h 34mSpirit Airlines
Deal found 5/13$39
Tue 6/118:29 amSAN - ORD
1 stop13h 21mSpirit Airlines
Deal found 5/13$53
Tue 6/49:12 pmSAN - STL
1 stop13h 53mSpirit Airlines
Deal found 5/14$57
Wed 6/262:52 pmSAN - STL
1 stop5h 15mFrontier
Deal found 5/13$58
Wed 6/122:52 pmSAN - ORD
1 stop9h 07mFrontier
Deal found 5/13$64
Tue 6/189:19 pmSAN - STL
1 stop13h 46mSpirit Airlines
Deal found 5/14$66
Wed 6/128:14 amSAN - ORD
1 stop13h 36mSpirit Airlines
Deal found 5/13$68
Wed 6/58:14 amSAN - ORD
1 stop13h 36mSpirit Airlines
Deal found 5/13$69
Sat 5/252:55 pmSAN - ORD
1 stop7h 23mFrontier
Deal found 5/13$70
Find flights from San Diego to Illinois within your budget
Customize your flight search to find flights from San Diego to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 14, 2024.
Fly from
Any airport
Fly to
Any airport
Budget
$114 - $276
Route
Depart
Return
Price
San DiegoChicago O'Hare Intl
SAN - ORD
SANORD
San Diego
Fri 5/31
1 stop8h 42m
Chicago O'Hare Intl
Tue 6/4
1 stop13h 10m
$114
San DiegoChicago O'Hare Intl
SAN - ORD
SANORD
San Diego
Thu 5/30
1 stop7h 28m
Chicago O'Hare Intl
Tue 6/4
1 stop13h 10m
$118
San DiegoLambert-St Louis
SAN - STL
SANSTL
San Diego
Tue 6/11
1 stop13h 46m
Lambert-St Louis
Thu 6/13
1 stop16h 05m
$120
San DiegoChicago O'Hare Intl
SAN - ORD
SANORD
San Diego
Fri 5/31
1 stop6h 49m
Chicago O'Hare Intl
Tue 6/4
1 stop13h 10m
$122
San DiegoLambert-St Louis
SAN - STL
SANSTL
San Diego
Wed 6/5
1 stop5h 15m
Lambert-St Louis
Sat 6/8
1 stop14h 16m
$124
San DiegoChicago O'Hare Intl
SAN - ORD
SANORD
San Diego
Sat 6/8
1 stop7h 13m
Chicago O'Hare Intl
Tue 6/11
1 stop12h 53m
$125
San DiegoLambert-St Louis
SAN - STL
SANSTL
San Diego
Wed 6/5
1 stop5h 15m
Lambert-St Louis
Thu 6/6
1 stop17h 29m
$128
San DiegoMoline Quad-City
SAN - MLI
SANMLI
San Diego
Sat 8/10
1 stop7h 58m
Moline Quad-City
Sat 8/17
1 stop6h 36m
$228
San DiegoMoline Quad-City
SAN - MLI
SANMLI
San Diego
Tue 8/27
1 stop9h 25m
Moline Quad-City
Sat 8/31
1 stop8h 03m
$276
No data available for this route at this time. Please check back soon.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated May 14, 2024.
To help decide which airline to fly from San Diego to Illinois, see what other customers have to say about Frontier, Spirit Airlines and American Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
6,045 reviews
Comfort
8.1
Entertainment
7.8
Crew
8.7
Food
7.3
Boarding
8.3
Overall
8.2
Reviews
1 / 10
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Southwest
6,045 reviews
Southwest
6,045 reviews
Comfort
8.1
Entertainment
7.8
Crew
8.7
Food
7.3
Boarding
8.3
Overall
8.2
Reviews
1 / 10
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
9,152 reviews
Southwest
6,045 reviews
Comfort
8.1
Entertainment
7.8
Crew
8.7
Food
7.3
Boarding
8.3
Overall
8.2
Reviews
1 / 10
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
10,706 reviews
Southwest
6,045 reviews
Comfort
8.1
Entertainment
7.8
Crew
8.7
Food
7.3
Boarding
8.3
Overall
8.2
Reviews
1 / 10
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
10,959 reviews
Southwest
6,045 reviews
Comfort
8.1
Entertainment
7.8
Crew
8.7
Food
7.3
Boarding
8.3
Overall
8.2
Reviews
1 / 10
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
14,561 reviews
Southwest
6,045 reviews
Comfort
8.1
Entertainment
7.8
Crew
8.7
Food
7.3
Boarding
8.3
Overall
8.2
Reviews
1 / 10
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Related info for your journey
Find useful and relevant information for your journey from San Diego to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for San Diego to IllinoisSee prices for flight routes from nearby airports that may be better suited for you.
See prices for flight routes from nearby airports that may be better suited for you.
Top 6 airlines flying from San Diego to Illinois
Discover the top 6 airlines that operate flights from San Diego to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 14, 2024.
Search flights from San Diego to Illinois by cabin class
Find flights from San Diego to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Hourly flight availability from San Diego to Illinois
Find hourly flight availability from San Diego to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 14, 2024.
| 1%of flight departures | Early morningMidnight to 6 am |
|---|---|
| 62%of flight departures | Morning6 am to noon |
| 23%of flight departures | AfternoonNoon to 6 pm |
| 14%of flight departures | Evening6 pm to midnight |
Midnight
6 AM
Noon
6 PM
Book a flight to one of these trending destinations
User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from San Diego to Illinois?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from San Diego to Illinois. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.
Why should you use Cheapflights to find cheap flight tickets from San Diego to Illinois?
By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Illinois from San Diego.
Can Cheapflights find flights from San Diego to Illinois with no change fees?
Yes, we can. To see specific flights from San Diego to Illinois with no change fees, users can toggle flexible booking options after using the search form above to find flights.
Can Cheapflights notify me if prices for flights from San Diego to Illinois become cheaper?
Yes, Cheapflights offers price alerts on San Diego to Illinois flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.