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

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Home North America USA California San Diego Cheap flights from Illinois to San Diego

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 2021: compare Illinois to San Diego flight prices with the expected peak season, weather and rainfall in San Diego.
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.

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.

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 October, November 2021

The best prices found for Illinois to SAN flights for October, November
29 Oct - 1 Nov
$58pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
29 Oct - 1 Nov
$72pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
29 Oct - 1 Nov
$74pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl

Illinois to San Diego 2021 flight deals

Cheap flights to San Diego from Illinois found for this year
29 Oct - 1 Nov
$58pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
4 Dec - 11 Dec
$69pp
ORD
Chicago O'Hare Intl
Spirit Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Spirit Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
29 Oct - 1 Nov
$72pp
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
29 Oct - 1 Nov
$58pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
29 Oct - 1 Nov
$72pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
29 Oct - 1 Nov
$74pp
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
26 Oct - 29 Oct
$79pp
ORD
Chicago O'Hare Intl
Multiple Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
27 Oct - 28 Oct
$81pp
ORD
Chicago O'Hare Intl
Spirit Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
27 Oct - 28 Oct
$96pp
ORD
Chicago O'Hare Intl
Multiple Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl

One-way flights to San Diego from Illinois

The cheapest one-way flights from Illinois to San Diego
11:00 am - 1:28 pm
United Airlines
Nonstop
4h 28m
ORD - SAN
United Airlines
$49
United
4:45 pm - 6:29 am
Multiple Airlines
1 Stop
15h 44m
ORD - SAN
Multiple Airlines
$68
Kiwi.com
8:42 am - 6:30 pm
Frontier
1 Stop
11h 48m
ORD - SAN
Frontier
$70
Flights by SU

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. Spirit Airlines, American Airlines, and United Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like Spirit Airlines with this kind of flexibility.

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 Spirit Airlines for just $58, but on average you can expect to pay $82.

Are there nonstop flights from Illinois to San Diego for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from Illinois to San Diego under $100. A good price for a nonstop flight from Illinois to San Diego is less than $91.

Are there last-minute flights available from Illinois to San Diego for under $100?

There are currently 20+ open flights from Illinois to San Diego within the next 7 days for less than $100.

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 $24. United Airlines flights start at $49 while deals on Frontier start at $64 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: Major Airline, American Airlines or Alaska Airlines.

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

Consider Japan Airlines (91%), Air Canada (89%) or United Airlines (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 $80. On average you can expect to pay $572. The most popular route, (Chicago O'Hare Intl - San Diego), can usually be booked for $58.

Related searches

Flights to San Diego (SAN) from Illinois
Flights to Illinois Flights to San Diego Flights from San Diego

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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 72 hours 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 72 hours 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.
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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 October in San Diego
77.0 °F
Avg rainfall for October in San Diego
0.6 ″

Airports servicing

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

Airports servicing San Diego

San Diego (SAN)

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
Frontier 		$74 $227 No cancel fee 62%
Spirit Airlines 		$92 $247 No cancel fee 65%
American Airlines 		$101 $413 No cancel fee 71%
United Airlines 		$114 $400 No cancel fee 69%
Delta 		$122 $382 No cancel fee N/A
Alaska Airlines 		$134 $427 No cancel fee 75%
Southwest 		$204 $519 No cancel fee 63%

Popular flight searches

Check out other popular destinations found by fellow travelers in 2021.
Home North America USA California San Diego Cheap flights from Illinois to San Diego