Cheap flights from Illinois (IL) to San Diego (SAN)

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How to find the cheapest flight from
Illinois to San Diego (SAN)

All the information you need to plan the best null to SAN flight in 2022: compare Illinois to San Diego flight prices with the expected peak season, weather and rainfall in San Diego.
How far in advance should I book a flight from Illinois to San Diego?

Find a great deal and save up to 9% by booking at least 16 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 $195.

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.

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

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, August can be a great choice for travel to San Diego. Flights to San Diego from Illinois in August are about $217 on average during August, but can be found for as low as $40.

Cheap flights from Illinois to San Diego in May, June 2022

The best prices found for Illinois to SAN flights for May, June
31 May - 3 Jun
$213pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
31 May - 2 Jun
$220pp
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
7 Jun - 16 Jun
$236pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
STL
Lambert-St Louis

Illinois to San Diego 2022 flight deals

Cheap flights to San Diego from Illinois found for this year
20 Sep - 27 Sep
$168pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
21 Sep - 24 Sep
$184pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
14 Sep - 17 Sep
$187pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl

Non-stop flights to San Diego from Illinois

Save time with Illinois to San Diego direct flight deals
20 Sep - 27 Sep
$168pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
21 Sep - 24 Sep
$184pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
14 Sep - 17 Sep
$187pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl

Last minute flights from Illinois to San Diego

Late deals on round-trip flights to San Diego from Illinois, departing today and this week
31 May - 3 Jun
$213pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
31 May - 2 Jun
$220pp
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
1 Jun - 2 Jun
$237pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis

One-way flights to San Diego from Illinois

The cheapest one-way flights from Illinois to San Diego
4:48 pm - 3:40 am
Allegiant Air
1 Stop
12h 52m
PIA - SAN
Allegiant Air
$140
Gotogate
2:15 pm - 8:28 am
Frontier
1 Stop
20h 13m
MDW - SAN
Frontier
$143
Kiwi.com
5:20 pm - 4:31 am
Multiple Airlines
1 Stop
13h 11m
STL - SAN
Multiple Airlines
$146
Gotogate

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Illinois</span> to <span class="emphasized">San Diego</span> flights.

Flight FAQs

From Illinois to San Diego

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.

Which airlines flying from Illinois to San Diego have flexible cancellations due to COVID-19?

Some of our airline partners flying from Illinois to San Diego have new flexible policies in place due to COVID-19. United Airlines, American Airlines, and Spirit Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like United Airlines with this kind of flexibility.

Can I find flights from Illinois to San Diego for under $200 on Cheapflights?

Yes, there are multiple flights from Illinois to San Diego for under $200. The cheapest flight booked recently is on Spirit Airlines for just $168, but on average you can expect to pay $206.

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 $215.

Are there last-minute flights available from Illinois to San Diego for under $300?

There are currently 20+ open flights from Illinois to San Diego within the next 7 days for less than $300.

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

Nonstop flights are available for this route on the following days: Sunday, Monday, Thursday, Friday, Saturday.

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

On average, you can expect to see 30 flights from Illinois to San Diego a day.
Morning (6am - Noon) - 17% of flight departures
Afternoon (Noon - 6pm) - 3% of flight departures
Evening (6pm - Midnight) - 80% of flight departures

How long is the flight from Illinois to San Diego?

For as low as $168, Spirit Airlines can have you in San Diego from Illinois in 4h 21m. Illinois and San Diego are separated by a distance of 1729 mi. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines to fly from Illinois to San Diego one-way?

To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $84. Frontier flights start at $88 while deals on Allegiant Air start at $127 one-way.

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

Before booking your flight from Illinois to San Diego check out the most popular airlines for this route: American Airlines, Alaska Airlines or Delta.

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

Consider Japan Airlines (90%), Finnair (86%) or Royal Jordanian (86%) when booking your flight. These represent the most reliable airlines when flying from Illinois to San Diego.

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

Most travelers choose Chicago O'Hare Intl - San Diego, Chicago Midway - San Diego or Lambert-St Louis - San Diego when deciding on the best route 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 $177. On average you can expect to pay $892. The most popular route, (Chicago O'Hare Intl - San Diego), can usually be booked for $168.

COVID Restrictions

View COVID Travel Restrictions for San Diego, CA

Do I need a COVID test to fly to San Diego from Illinois?

Information is based on travel restrictions for travel to San Diego within the United States

Most visitors from Illinois need to provide a negative COVID-19 test result and/or quarantine to enter San Diego.

COVID-19 testing requirements
Visitors from Illinois must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to San Diego.

Quarantine requirements
Visitors from Illinois are not required to quarantine after entering San Diego.

Do I need a test to fly back to Illinois from San Diego?

Returning to Illinois from San Diego

COVID-19 testing requirements
Visitors from San Diego must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Illinois.

Quarantine requirements
Visitors from San Diego are not required to quarantine after entering Illinois.

Hide COVID Travel Restrictions for San Diego, CA

Departure points for flights from Illinois to San Diego

Select to see more specific information for flights to San Diego from all departure points in Illinois.

Destination information for San Diego

Things to know before you go - useful duration and weather info for your trip from Illinois to San Diego.
Flight duration from Illinois to SAN
4h 09m
Average temperature for May in San Diego
71.6 °F
Avg rainfall for May in San Diego
0.2 ″

Airports servicing

Bloomington (BMI)
Champaign (CMI)
Decatur (DEC)
Moline (MLI)
Marion (MWA)

Airports servicing San Diego

Top 7 airlines flying from Illinois to San Diego

The chart below displays the airlines Cheapflights users traveling from Illinois to San Diego choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Juneyao Airlines
$12 $24 No cancel fee 66%

We couldn't confirm the COVID-19 safety measures taken by Juneyao Airlines. Please check directly on their website for additional information.

Spirit Airlines
$54 $203 No cancel fee 65%
Frontier
$91 $352 No cancel fee 62%
Delta
$108 $450 No cancel fee N/A
American Airlines
$108 $474 No cancel fee 71%
United Airlines
$117 $437 No cancel fee 69%
Alaska Airlines
$195 $469 No cancel fee 75%
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