Cheap flights from Illinois to San Diego (SAN) from $55

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 4/15. 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.
ORD — SAN
Mar 24 — Mar 311

How far in advance should I book a flight from Illinois to San Diego?

Find a great deal and save up to 51% by booking at least 12 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 Illinois to San Diego within the next two weeks, with the cheapest ticket starting at $352.

What is the cheapest month to fly from Illinois to San Diego?

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, September can be a great choice for travel to San Diego. Flights to San Diego from Illinois in September are about $408 on average during September, but can be found for as low as $150.

When is the cheapest time to fly from Illinois to San Diego (IL - SAN)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to San Diego as you normally would.

Cheap Frontier flights from Illinois to San Diego

Explore cheap flight options specifically provided by Frontier for the route between Illinois and San Diego. 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 3,145,932 searches. Data last updated March 19, 2024.
Consider these cheap Frontier flights we've found departing from Illinois to San Diego. Make sure to double check the flight details before booking.
Mon 4/158:04 pmSTL - SAN
1 stop12h 56mFrontier
Mon 4/229:32 pmSAN - STL
1 stop10h 46mFrontier
Deal found 3/17$97
Thu 4/1110:56 pmSTL - SAN
1 stop10h 58mFrontier
Sat 4/139:14 pmSAN - STL
1 stop11h 04mFrontier
Deal found 3/17$98
Mon 4/812:06 pmMDW - SAN
1 stop6h 56mFrontier
Thu 4/114:29 pmSAN - MDW
1 stop27h 40mFrontier
Deal found 3/18$117
Sun 4/77:37 pmSTL - SAN
1 stop26h 38mFrontier
Wed 4/109:32 pmSAN - STL
1 stop22h 34mFrontier
Deal found 3/18$118
Sat 4/2010:59 pmMDW - SAN
1 stop10h 04mFrontier
Sat 4/279:33 amSAN - MDW
1 stop9h 06mFrontier
Deal found 3/17$119
Wed 4/105:30 amMDW - SAN
1 stop13h 45mFrontier
Sat 4/135:40 pmSAN - MDW
1 stop12h 41mFrontier
Deal found 3/17$120
Wed 4/107:51 pmSTL - SAN
1 stop14h 03mFrontier
Mon 4/159:32 pmSAN - STL
1 stop10h 46mFrontier
Deal found 3/18$122
Sun 4/1410:59 pmMDW - SAN
1 stop11h 15mFrontier
Thu 4/189:38 pmSAN - MDW
1 stop11h 58mFrontier
Deal found 3/17$123
Thu 4/2510:59 pmSTL - SAN
1 stop10h 55mFrontier
Sat 5/258:41 pmSAN - STL
1 stop11h 37mFrontier
Deal found 3/18$125

Cheap Spirit Airlines flights from Illinois to San Diego

Explore cheap flight options specifically provided by Spirit Airlines for the route between Illinois and San Diego. 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 3,145,932 searches. Data last updated March 19, 2024.
Take a gander at the lowest prices we've found on Spirit Airlines flights from Illinois to San Diego. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
Thu 4/1111:58 pmORD - SAN
1 stop13h 57mSpirit Airlines
Mon 4/1510:25 pmSAN - ORD
1 stop14h 07mSpirit Airlines
Deal found 3/17$171
Thu 4/1811:58 pmORD - SAN
1 stop13h 57mSpirit Airlines
Mon 4/226:26 pmSAN - ORD
1 stop10h 03mSpirit Airlines
Deal found 3/18$172
Wed 4/1710:00 pmORD - SAN
3 stops27h 48mSpirit Airlines
Wed 4/246:26 pmSAN - ORD
1 stop10h 03mSpirit Airlines
Deal found 3/18$175
Mon 4/810:46 pmORD - SAN
2 stops26h 41mSpirit Airlines
Thu 4/1110:25 pmSAN - ORD
1 stop6h 04mSpirit Airlines
Deal found 3/18$186
Tue 4/210:46 pmORD - SAN
2 stops24h 46mSpirit Airlines
Tue 4/910:20 pmSAN - ORD
1 stop5h 47mSpirit Airlines
Deal found 3/18$187
Sat 4/138:00 amORD - SAN
1 stop12h 59mSpirit Airlines
Mon 4/156:26 pmSAN - ORD
2 stops19h 47mSpirit Airlines
Deal found 3/18$188
Tue 3/2610:46 pmORD - SAN
2 stops26h 41mSpirit Airlines
Mon 4/111:06 pmSAN - ORD
1 stop5h 24mSpirit Airlines
Deal found 3/17$245
Wed 3/2710:46 pmORD - SAN
2 stops26h 41mSpirit Airlines
Fri 4/56:15 amSAN - ORD
1 stop10h 31mSpirit Airlines
Deal found 3/18$248
Mon 3/2510:46 pmORD - SAN
2 stops24h 46mSpirit Airlines
Mon 4/15:20 pmSAN - ORD
1 stop11h 10mSpirit Airlines
Deal found 3/18$291

Cheap Illinois to San Diego flights in March & April 2024

Find cheap flight options from Illinois to San Diego specifically for the months of March and April 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,145,932 searches. Prices were last updated on March 19, 2024.
Check out some of the best flight deals from Illinois to San Diego in 2024. Check back in a little while for more flight options.
Mon 4/158:04 pmSTL - SAN
1 stop12h 56mFrontier
Mon 4/229:32 pmSAN - STL
1 stop10h 46mFrontier
Deal found 3/17$97
Thu 4/1110:56 pmSTL - SAN
1 stop10h 58mFrontier
Sat 4/139:14 pmSAN - STL
1 stop11h 04mFrontier
Deal found 3/17$98
Sun 4/77:37 pmSTL - SAN
1 stop26h 38mFrontier
Wed 4/109:32 pmSAN - STL
1 stop22h 34mFrontier
Deal found 3/18$118
Tue 4/2310:59 pmSTL - SAN
1 stop10h 35mFrontier
Mon 4/299:32 pmSAN - STL
1 stop10h 46mFrontier
Deal found 3/17$119
Wed 4/107:51 pmSTL - SAN
1 stop14h 03mFrontier
Mon 4/159:32 pmSAN - STL
1 stop10h 46mFrontier
Deal found 3/18$122
Thu 4/2510:59 pmSTL - SAN
1 stop10h 55mFrontier
Sat 5/258:41 pmSAN - STL
1 stop11h 37mFrontier
Deal found 3/18$125
Wed 4/38:45 pmSTL - SAN
1 stop13h 32mFrontier
Tue 4/93:35 pmSAN - STL
1 stop16h 12mFrontier
Deal found 3/18$128
Wed 4/107:51 pmSTL - SAN
1 stop21h 38mFrontier
Sun 4/147:53 amSAN - STL
1 stop24h 25mFrontier
Deal found 3/18$133
Tue 4/1610:59 pmSTL - SAN
1 stop14h 56mMultiple Airlines
Tue 4/236:26 pmSAN - STL
2 stops13h 21mMultiple Airlines
Deal found 3/17$140

Illinois to San Diego 2024 flight deals

Discover exclusive flight deals for travel between Illinois and San Diego in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
Check out some of the best flight deals from Illinois to San Diego in 2024. Check back in a little while for more flight options.
Mon 4/158:04 pmSTL - SAN
1 stop12h 56mFrontier
Mon 4/229:32 pmSAN - STL
1 stop10h 46mFrontier
Deal found 3/17$97
Thu 4/1110:56 pmSTL - SAN
1 stop10h 58mFrontier
Sat 4/139:14 pmSAN - STL
1 stop11h 04mFrontier
Deal found 3/17$98
Tue 4/1612:29 pmORD - SAN
1 stop23h 47mMultiple Airlines
Tue 4/238:00 pmSAN - ORD
1 stop8h 07mMultiple Airlines
Deal found 3/18$99
Tue 4/169:27 amORD - SAN
1 stop11h 32mSpirit Airlines
Tue 4/238:00 pmSAN - ORD
1 stop8h 07mSpirit Airlines
Deal found 3/18$109
Sat 4/136:27 pmORD - SAN
1 stop15h 06mMultiple Airlines
Wed 4/176:26 pmSAN - ORD
1 stop10h 03mMultiple Airlines
Deal found 3/18$111
Wed 4/176:27 pmORD - SAN
1 stop15h 36mMultiple Airlines
Wed 4/246:26 pmSAN - ORD
1 stop10h 03mMultiple Airlines
Deal found 3/18$114
Tue 4/166:47 pmORD - SAN
2 stops19h 08mMultiple Airlines
Tue 4/238:00 pmSAN - ORD
1 stop8h 07mMultiple Airlines
Deal found 3/18$117
Sun 4/77:37 pmSTL - SAN
1 stop26h 38mFrontier
Wed 4/109:32 pmSAN - STL
1 stop22h 34mFrontier
Deal found 3/18$118
Sat 4/134:05 pmORD - SAN
1 stop9h 01mSpirit Airlines
Wed 4/176:26 pmSAN - ORD
1 stop10h 03mSpirit Airlines
Deal found 3/18$119

Non-stop flights to San Diego from Illinois

Discover non-stop flight options from Illinois to San Diego. 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 3,145,932 searches. Data last updated March 19, 2024.
If you're seeking options on non-stop flights from Illinois to San Diego, check out these fares. Select from other flights from Illinois to San Diego by using the search form above.
Sat 4/275:05 pmORD - SAN
Nonstop4h 15mAmerican Airlines
Sat 4/2710:50 pmSAN - ORD
Nonstop4h 07mAmerican Airlines
Deal found 3/18$173
Wed 4/171:45 pmORD - SAN
Nonstop4h 29mUnited Airlines
Wed 4/245:15 pmSAN - ORD
Nonstop4h 01mUnited Airlines
Deal found 3/18$179
Wed 4/178:57 pmORD - SAN
Nonstop4h 15mAmerican Airlines
Mon 4/2210:50 pmSAN - ORD
Nonstop4h 06mAmerican Airlines
Deal found 3/18$199
Wed 5/151:45 pmORD - SAN
Nonstop4h 29mUnited Airlines
Sun 5/1910:29 pmSAN - ORD
Nonstop4h 01mUnited Airlines
Deal found 3/18$211
Fri 5/178:55 pmORD - SAN
Nonstop4h 19mAmerican Airlines
Mon 5/2010:57 pmSAN - ORD
Nonstop4h 03mAmerican Airlines
Deal found 3/18$219
Sat 4/137:57 pmORD - SAN
Nonstop4h 33mUnited Airlines
Mon 4/1510:29 pmSAN - ORD
Nonstop4h 01mUnited Airlines
Deal found 3/18$239
Sat 4/138:57 pmORD - SAN
Nonstop4h 15mAmerican Airlines
Mon 4/1510:50 pmSAN - ORD
Nonstop4h 06mAmerican Airlines
Deal found 3/18$244
Thu 5/22:00 pmORD - SAN
Nonstop4h 29mUnited Airlines
Sun 5/510:29 pmSAN - ORD
Nonstop4h 01mUnited Airlines
Deal found 3/17$255
Fri 4/194:15 pmORD - SAN
Nonstop4h 29mUnited Airlines
Tue 4/235:15 pmSAN - ORD
Nonstop4h 01mUnited Airlines
Deal found 3/18$257

Illinois to San Diego flights leaving soon

Find last-minute flight options from Illinois to San Diego 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 3,145,932 searches. Data last updated March 19, 2024.
Users seeking a last-minute flight from Illinois to San Diego should consider booking one of these fares. Users should double check the flight they book to ensure it matches the day, time, and destination they're looking for.
Tue 3/2610:04 pmSTL - SAN
1 stop11h 43mFrontier
Mon 4/19:15 pmSAN - STL
1 stop11h 08mFrontier
Deal found 3/18$152
Tue 3/2610:04 pmSTL - SAN
1 stop11h 43mFrontier
Tue 4/27:32 pmSAN - STL
2 stops12h 40mFrontier
Deal found 3/18$157
Wed 3/277:37 pmSTL - SAN
1 stop29h 50mMultiple Airlines
Tue 4/210:28 pmSAN - STL
1 stop9h 55mMultiple Airlines
Deal found 3/18$162
Tue 3/267:37 pmSTL - SAN
1 stop18h 24mMultiple Airlines
Tue 4/210:28 pmSAN - STL
1 stop9h 55mMultiple Airlines
Deal found 3/18$166
Tue 3/265:51 pmMDW - SAN
1 stop16h 38mFrontier
Tue 4/27:02 pmSAN - MDW
1 stop12h 44mFrontier
Deal found 3/17$172
Mon 3/257:37 pmSTL - SAN
1 stop18h 17mMultiple Airlines
Tue 4/210:28 pmSAN - STL
1 stop9h 55mMultiple Airlines
Deal found 3/18$185
Wed 3/277:37 pmSTL - SAN
1 stop18h 17mMultiple Airlines
Thu 4/411:06 pmSAN - STL
1 stop9h 17mMultiple Airlines
Deal found 3/18$186
Tue 3/267:37 pmSTL - SAN
1 stop18h 24mMultiple Airlines
Wed 4/310:28 pmSAN - STL
1 stop9h 55mMultiple Airlines
Deal found 3/18$189
Tue 3/2612:26 pmMDW - SAN
1 stop6h 35mFrontier
Tue 4/27:32 pmSAN - MDW
2 stops10h 52mFrontier
Deal found 3/17$193

One-way flights to San Diego from Illinois

Search for one-way flight options from Illinois to San Diego. 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 3,145,932 searches. Data last updated March 19, 2024.
If you're seeking multiple options on one-way flights from Illinois to San Diego, be sure to check out these deals, which are updated often. Users in need of a round-trip flight from Illinois to San Diego instead should update the search form at the top of page.
Mon 4/158:04 pmSTL - SAN
1 stop12h 56mFrontier
Deal found 3/17$55
Mon 4/812:06 pmMDW - SAN
1 stop6h 56mFrontier
Deal found 3/18$59
Tue 4/169:27 amORD - SAN
1 stop11h 32mSpirit Airlines
Deal found 3/17$59
Wed 4/175:45 amMDW - SAN
1 stop9h 36mFrontier
Deal found 3/18$64
Fri 4/1210:59 pmMDW - SAN
1 stop10h 55mFrontier
Deal found 3/18$65
Sat 5/1110:30 amMDW - SAN
1 stop11h 45mFrontier
Deal found 3/19$67
Wed 4/105:30 amMDW - SAN
1 stop13h 45mFrontier
Deal found 3/18$68
Tue 5/76:27 pmORD - SAN
1 stop24h 48mFrontier
Deal found 3/17$68
Sun 4/1410:59 pmMDW - SAN
1 stop11h 15mFrontier
Deal found 3/18$69

Find flights from Illinois to San Diego within your budget

Customize your flight search to find flights from Illinois to San Diego 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 3,145,932 searches. Data last updated March 19, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$97 - $236

Route

Depart

Return

Price

Lambert-St LouisSan Diego

STL - SAN

STLSAN

Lambert-St Louis

Mon 4/15

1 stop12h 56m

San Diego

Mon 4/22

1 stop10h 46m

$97

Lambert-St LouisSan Diego

STL - SAN

STLSAN

Lambert-St Louis

Thu 4/11

1 stop10h 58m

San Diego

Sat 4/13

1 stop11h 04m

$98

Chicago MidwaySan Diego

MDW - SAN

MDWSAN

Chicago Midway

Mon 4/8

1 stop6h 56m

San Diego

Thu 4/11

1 stop27h 40m

$117

Chicago MidwaySan Diego

MDW - SAN

MDWSAN

Chicago Midway

Sat 4/13

1 stop11h 45m

San Diego

Tue 4/16

1 stop10h 03m

$118

Lambert-St LouisSan Diego

STL - SAN

STLSAN

Lambert-St Louis

Tue 4/16

1 stop14h 56m

San Diego

Tue 4/23

2 stops13h 21m

$140

Chicago O'Hare IntlSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Thu 4/11

1 stop13h 57m

San Diego

Mon 4/15

1 stop14h 07m

$171

Chicago O'Hare IntlSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Sat 4/27

Nonstop4h 15m

San Diego

Sat 4/27

Nonstop4h 07m

$173

Chicago O'Hare IntlSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Wed 4/17

Nonstop4h 29m

San Diego

Wed 4/24

Nonstop4h 01m

$179

Chicago MidwaySan Diego

MDW - SAN

MDWSAN

Chicago Midway

Sat 4/20

1 stop7h 40m

San Diego

Sat 4/20

1 stop8h 45m

$236

Flights are sorted by cheapest first

Deals found on 3/17

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. 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 San Diego. Reviews last updated March 19, 2024.
To help decide which airline to fly from Illinois to San Diego, 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
8.2
Very good
6,382 reviews

Boarding

8.3

Entertainment

7.9

Overall

8.2

Crew

8.8

Comfort

8.1

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Southwest
8.2
Very good
6,382 reviews
Southwest
8.2
Very good
6,382 reviews

Boarding

8.3

Entertainment

7.9

Overall

8.2

Crew

8.8

Comfort

8.1

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

8.1
Very good
9,150 reviews
Southwest
8.2
Very good
6,382 reviews

Boarding

8.3

Entertainment

7.9

Overall

8.2

Crew

8.8

Comfort

8.1

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

8.1
Very good
11,551 reviews
Southwest
8.2
Very good
6,382 reviews

Boarding

8.3

Entertainment

7.9

Overall

8.2

Crew

8.8

Comfort

8.1

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

7.5
Good
3,066 reviews
Southwest
8.2
Very good
6,382 reviews

Boarding

8.3

Entertainment

7.9

Overall

8.2

Crew

8.8

Comfort

8.1

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

7.4
Good
11,602 reviews
Southwest
8.2
Very good
6,382 reviews

Boarding

8.3

Entertainment

7.9

Overall

8.2

Crew

8.8

Comfort

8.1

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Related info for your journey

Find useful and relevant information for your journey from Illinois to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly into for flights to San Diego from Illinois?

    Most people fly into San Diego (SAN) if they book a flight to San Diego from Illinois. San Diego is conveniently located just 2.6 mi from San Diego’s city center.

  • Can I find flights from Illinois to San Diego for under $100 on Cheapflights?

    Yes, there are multiple flights from Illinois to San Diego for under $100. The cheapest flight booked recently is on Frontier for just $97, but on average you can expect to pay $123.

  • Are there nonstop flights from Illinois to San Diego for under $200 on Cheapflights?

    Cheapflights has at least 20 direct flights from Illinois to San Diego under $200. A good price for a nonstop flight from Illinois to San Diego is less than $251.

  • Are there last-minute flights available from Illinois to San Diego for under $200?

    There are currently 20+ open flights from Illinois to San Diego within the next 7 days for less than $200.

  • What days are nonstop flights available from Illinois to San Diego?

    Nonstop flights are available for this route on the following days: Tuesday, Saturday.

  • How many flights depart from Illinois to San Diego on average per day?

    On average, you can expect to see 7 flights from Illinois to San Diego a day.
    Morning (6am - Noon) - 43% of flight departures
    Evening (6pm - Midnight) - 57% of flight departures

  • How long is the flight from Illinois to San Diego?

    For as low as $97, Frontier can have you in San Diego from Illinois in 12h 56m. Illinois and San Diego are separated by a distance of 1729 mi.

  • What are the most popular routes from Illinois to San Diego?

  • What are the most popular airlines that fly from Illinois to San Diego?

  • What are the most reliable airlines from Illinois to San Diego?

    Consider SWISS (96%), Emirates (92%) or Japan Airlines (90%) when booking your flight. These represent the most reliable airlines when flying from Illinois to San Diego.

  • What are the cheapest flights from Illinois to San Diego?

    The cheapest flight price from Illinois to San Diego is $109. On average you can expect to pay $712. The most popular route, (Chicago O'Hare Intl - San Diego), can usually be booked for $93.

  • What does ORD to SAN mean?

    Chicago O'Hare Intl Airport is ORD and San Diego Airport is SAN. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service. Chicago Midway Airport (MDW), Moline Quad-City Airport (MLI), Greater Peoria Airport (PIA), Bloomington-Normal Airport (BMI), Springfield Capital Airport (SPI) are some additional IATA codes for airports related to your trip.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Illinois to San Diego
See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from Illinois to San Diego

Discover the top 6 airlines that operate flights from Illinois to San Diego. 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 3,145,932 searches. Data last updated March 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$118Average$219FlexibilityNo cancel feeOn-time62%
Search Frontier flights
DeltaCheapest$118Average$408FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Spirit AirlinesCheapest$125Average$245FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
United AirlinesCheapest$218Average$521FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Alaska AirlinesCheapest$236Average$472FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
American AirlinesCheapest$246Average$529FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Search flights from Illinois to San Diego by cabin class

Find flights from Illinois to San Diego, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Hourly flight availability from Illinois to San Diego

Find hourly flight availability from Illinois to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 19, 2024.
7%of flight departuresEarly morningMidnight to 6 am
14%of flight departuresMorning6 am to noon
41%of flight departuresAfternoonNoon to 6 pm
38%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

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 Illinois to San Diego?

When you search for this flight from Illinois to San Diego, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Illinois to San Diego?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Illinois to San Diego for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Illinois to San Diego with no change fees?

Yes! Cheapflights helps users easily find flights from Illinois to San Diego with no change fees.

Can Cheapflights notify me if prices for flights from Illinois to San Diego become cheaper?

Not ready to book yet? You can track prices for flights from Illinois to San Diego on Cheapflights with our Price Alert feature and get notified when better prices are available.

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