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 2021: 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?

Users have found that booking a flight from Illinois to San Diego at least 17 days early can save you up to 27% on average compared to booking a flight this week. If booking 17 days before your flight isn’t an option for you, users have found flights from Illinois to San Diego for as little as $73 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $98 for flights departing within the next 3 days.

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, July can be a great choice for travel to San Diego. Flights to San Diego from Illinois in July are about $80 on average during July, but can be found for as low as $44.

Cheap flights from Illinois to San Diego in June, July 2021

The best prices found for Illinois to SAN flights for June, July
6 Jul - 13 Jul
$141pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
STL
Lambert-St Louis
7 Jul - 14 Jul
$150pp
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 Jul - 17 Jul
$151pp
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
22 Sep - 29 Sep
$118pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
22 Sep - 29 Sep
$119pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
16 Sep - 21 Sep
$123pp
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
22 Sep - 29 Sep
$118pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
22 Sep - 29 Sep
$119pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
16 Sep - 21 Sep
$123pp
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
25 Jun - 3 Jul
$151pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
25 Jun - 13 Aug
$171pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
25 Jun - 29 Jun
$176pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
STL
Lambert-St Louis

One-way flights to San Diego from Illinois

The cheapest one-way flights from Illinois to San Diego
4:02 pm - 12:47 pm
Frontier
1 Stop
22h 45m
ORD - SAN
Frontier
$92
Kiwi.com
11:52 am - 2:12 pm
Spirit Airlines
Nonstop
4h 20m
ORD - SAN
Spirit Airlines
$94
Gotogate
2:20 pm - 4:29 pm
Multiple Airlines
1 Stop
28h 09m
STL - SAN
Multiple Airlines
$96
Kiwi.com

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

Are flight prices decreasing from Illinois to San Diego due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Illinois and San Diego for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Illinois to San Diego to control the spread of COVID-19?

Airlines globally have implemented additional safety measures to accommodate you. Alaska Airlines is one of them. Some of the new policies that have been implemented to accommodate travelers flying from Illinois to San Diego are improved sanitation, HEPA filters, mask requirements, social distance seating (for a limited time), and pre-flight testing for antibodies and symptoms. Policies will vary by airline.

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.

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 $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 $118, but on average you can expect to pay $132.

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 $135.

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?

You can find nonstop flights on the following days: Sunday, Saturday.

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 popular routes from Illinois to San Diego?

When deciding which route to take from Illinois to San Diego consider Chicago O'Hare Intl - San Diego, Chicago Midway - San Diego or Lambert-St Louis - San Diego as they are the most popular.

What are the cheapest Flights from Illinois to San Diego?

On average you can expect to pay $572 for a flight from Illinois to San Diego. The cheapest flight overall is $81 while the most popular route, (Chicago O'Hare Intl - San Diego) is currently priced at $124.

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

The top 3 most reliable airlines when flying from Illinois to San Diego are Japan Airlines (100%), LOT (100%) and Finnair (100%).

How long is the flight from Illinois to San Diego?

A quick flight from Illinois to San Diego can take about 4h 20m. Spirit Airlines provides one of the quickest options available for as low as $151. All flights are typically nonstop.

What are the cheapest airlines flying from Illinois to San Diego round-trip?

Spirit Airlines, at $118, was found to be the cheapest airline from Illinois to San Diego. An alternate airline flying to your destination would be Frontier.

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

One-way options have recently been found by users for as low as $59 on Spirit Airlines. Another option is Frontier, who have fights from $69.

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
4h 16m
Average temperature for June in San Diego
75.2 °F
Avg rainfall for June in San Diego
0.1 ″

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
Frontier
$74 $227 No cancel fee 62%
Spirit Airlines
$92 $247 No cancel fee 65%
Delta
$122 $382 No cancel fee N/A
United Airlines
$114 $388 No cancel fee 69%
American Airlines
$101 $392 No cancel fee 71%
Alaska Airlines
$134 $427 No cancel fee 75%
Southwest
$204 $519 No cancel fee 63%
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