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

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

All the information you need to plan the best SAN to ORD flight in 2021: compare San Diego to Illinois flight prices with the expected peak season, weather and rainfall in Illinois.
How far in advance should I book a flight from San Diego to Illinois?

Find a great deal and save up to 11% by booking at least 18 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 San Diego to Illinois within the next two weeks, with the cheapest ticket starting at $189.

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

When flying from San Diego to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Our data shows that August tends to be the cheapest month to fly to Illinois from San Diego. Users have commonly found prices around $205 for the month, but tickets can be as low as $35. Due to multiple factors, prepare for potentially higher prices in December.

Cheap flights from San Diego to Illinois in November, December 2021

The best prices found for SAN to Illinois flights for November, December
8 Dec - 5 Jan
$108pp
SAN
San Diego
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SAN
San Diego
7 Dec - 5 Jan
$118pp
SAN
San Diego
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SAN
San Diego
4 Dec - 11 Dec
$123pp
SAN
San Diego
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SAN
San Diego

San Diego to Illinois 2022 flight deals

Cheap flights to Illinois from San Diego found for next year
8 Dec - 5 Jan
$108pp
SAN
San Diego
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SAN
San Diego
7 Dec - 5 Jan
$118pp
SAN
San Diego
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SAN
San Diego
4 Dec - 11 Dec
$123pp
SAN
San Diego
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SAN
San Diego

Non-stop flights to Illinois from San Diego

Save time with San Diego to Illinois direct flight deals
4 May - 7 May
$161pp
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
13 May - 15 May
$171pp
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego
5 May - 8 May
$173pp
SAN
San Diego
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
SAN
San Diego

Last minute flights from San Diego to Illinois

Late deals on round-trip flights to Illinois from San Diego, departing today and this week
8 Dec - 5 Jan
$108pp
SAN
San Diego
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SAN
San Diego
7 Dec - 5 Jan
$118pp
SAN
San Diego
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SAN
San Diego
4 Dec - 11 Dec
$123pp
SAN
San Diego
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SAN
San Diego

One-way flights to Illinois from San Diego

The cheapest one-way flights from San Diego to Illinois
10:47 am - 4:55 pm
Spirit Airlines
Nonstop
4h 08m
SAN - ORD
Spirit Airlines
$76
JustFly
2:59 am - 11:03 pm
Multiple Airlines
1 Stop
18h 04m
SAN - ORD
Multiple Airlines
$79
Kiwi.com
12:14 pm - 1:18 am
Frontier
1 Stop
11h 04m
SAN - ORD
Frontier
$80
JustFly

Related info for your journey

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

Flight FAQs

From San Diego to Illinois

What airport do you fly from for flights from San Diego to Illinois?

Located just 2.6 mi from the city center, San Diego (SAN) is the airport most travelers will use when flying to Illinois from San Diego.

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

Some of our airline partners flying from San Diego to Illinois 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 San Diego to Illinois for under $100 on Cheapflights?

Yes, there are multiple flights from San Diego to Illinois for under $100. The cheapest flight booked recently is on Frontier for just $89, but on average you can expect to pay $115.

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

Cheapflights has at least 20 direct flights from San Diego to Illinois under $200. A good price for a nonstop flight from San Diego to Illinois is less than $236.

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

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

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

Days when nonstop flights are available for this flight are: Sunday, Monday, Tuesday, Friday.

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

Travelers can expect 14 flights from San Diego to Illinois on average per day.
Morning (6am - Noon) - 64% of flight departures
Afternoon (Noon - 6pm) - 21% of flight departures
Evening (6pm - Midnight) - 14% of flight departures

How long is the flight from San Diego to Illinois?

There are many flights that can get you from San Diego to Illinois in 8h. Fly via Frontier or Spirit Airlines to get the fastest option. There are 1729 mi between San Diego and Illinois. This flight may include one or multiple stops.

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

While some choose either San Diego - Chicago Midway or San Diego - Lambert-St Louis, San Diego - Chicago O'Hare Intl is the most popular route from San Diego to Illinois.

What are the cheapest flights from San Diego to Illinois?

While on average a flight from San Diego to Illinois is generally $436, our data shows the cheapest flight currently is $36. When looking at the most popular route, (San Diego - Chicago O'Hare Intl), you can expect to pay $103 for that flight.

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

The most popular airlines flying from San Diego to Illinois are Major Airline, American Airlines and Alaska Airlines. Something to consider prior to booking your flight.

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

The top 3 most reliable airlines when flying from San Diego to Illinois are Aer Lingus (94%), Austrian Airlines (93%) and United Airlines (91%).

COVID Restrictions

View COVID Travel Restrictions for Illinois (IL)

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

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

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

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.

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

Returning to San Diego from Illinois

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.

Hide COVID Travel Restrictions for Illinois (IL)

Destination points for flights from San Diego to Illinois

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

Destination information for Illinois

Things to know before you go - useful duration and weather info for your trip from San Diego to Illinois.

Airports servicing San Diego

Airports servicing

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

Top 6 airlines flying from San Diego to Illinois

The chart below displays the airlines Cheapflights users traveling from San Diego to Illinois 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
Spirit Airlines
$100 $258 No cancel fee 65%
Frontier
$101 $202 No cancel fee 62%
American Airlines
$105 $416 No cancel fee 71%
United Airlines
$115 $392 No cancel fee 69%
Delta
$122 $361 No cancel fee N/A
Alaska Airlines
$134 $449 No cancel fee 75%
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