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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)

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 33 days early can save you up to 19% on average compared to booking a flight this week. If booking 33 days before your flight isn’t an option for you, users have found flights from Illinois to San Diego for as little as $86 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 $107 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 March. For low rates, May can be a great choice for travel to San Diego. Flights to San Diego from Illinois in May are about $98 on average during May, but can be found for as low as $58.

Cheap flights from Illinois to San Diego in September, October 2020

The best prices found for Illinois to SAN flights for September, October
19 Oct - 23 Oct
$48pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
28 Sep - 9 Oct
$49pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
19 Oct - 23 Oct
$50pp
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 2020 flight deals

Cheap flights to San Diego from Illinois found for this year
19 Oct - 23 Oct
$48pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
28 Sep - 9 Oct
$49pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
19 Oct - 23 Oct
$50pp
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
19 Oct - 26 Oct
$48pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
28 Sep - 9 Oct
$49pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
2 Oct - 9 Oct
$51pp
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
28 Sep - 9 Oct
$48pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
28 Sep - 9 Oct
$49pp
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
1 Oct - 8 Oct
$60pp
ORD
Chicago O'Hare Intl
Spirit 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
3:10 am - 5:27 am
Spirit Airlines
Nonstop
4h 17m
ORD - SAN
Spirit Airlines
$24
Gotogate
3:10 am - 5:27 am
Spirit Airlines
Nonstop
4h 17m
ORD - SAN
Spirit Airlines
$25
Travelgenio
3:00 am - 5:17 am
Spirit Airlines
Nonstop
4h 17m
ORD - SAN
Spirit Airlines
$26
Spirit

Related info for your journey

Useful info, stats and facts about Illinois to San Diego 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.

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 $48, but on average you can expect to pay $61.

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 $67.

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 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 Moline Quad-City - 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 $218 for a flight from Illinois to San Diego. The cheapest flight overall is $88 while the most popular route, (Chicago O'Hare Intl - San Diego) is currently priced at $20.

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 LOT (100%), Gulf Air (100%) and Aer Lingus (99%).

How long is the flight from Illinois to San Diego?

A quick flight from Illinois to San Diego can take about 4h 17m. Spirit Airlines provides one of the quickest options available for as low as $48. All flights are typically nonstop.

What is the cheapest airline to fly from Illinois to San Diego round-trip?

Spirit Airlines, at $48, was found to be the cheapest airline from Illinois to San Diego..

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 $24 on Spirit Airlines.

Arrival points for flights from Illinois to San Diego

Destination information for San Diego

Things to know before you go. Useful info for your trip from Illinois to San Diego
Flight duration
4h 06m
Average temperature for September in San Diego
80.6 °F
Avg rainfall for September in San Diego
0.1 ″

Airports servicing

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

Airports servicing San Diego

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