$55+ Cheap flights from Illinois to San Diego (SAN)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Illinois to San Diego with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Illinois to San Diego
Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated enero 17, 2025.
Round-trip from | $148 (Kiwi.com) |
|---|---|
One-way from | $55 (Frontier) |
Find flight deals from Illinois to San Diego
Cheapest flights from Illinois to San DiegoExplore the most affordable flight options available from Illinois to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 17, 2025.
Explore the most affordable flight options available from Illinois to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 17, 2025.
This Kiwi.com deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Cheapflightsfares deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This FlightHub deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kiwi.com deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This FlightHub deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kissandfly.com deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Travelocity deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Find flights from Illinois to San Diego within your budget
Customize your flight search to find flights from Illinois to San Diego that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated enero 17, 2025.
Fly from
Fly to
Route
Depart
Return
Price
ChicagoSan Diego
MDW - SAN
MDWSAN
Chicago Midway
sáb. 2/15
8:44 pm-1:28 pm
1 stop18h 44m
San Diego
vie. 2/21
6:25 am-12:17 am
1 stop15h 52m
ChicagoSan Diego
ORD - SAN
ORDSAN
Chicago O'Hare Intl
jue. 5/8
3:31 pm-7:49 pm
1 stop6h 18m
San Diego
jue. 5/15
6:25 am-2:26 pm
1 stop6h 01m
ChicagoSan Diego
ORD - SAN
ORDSAN
Chicago O'Hare Intl
lun. 1/27
10:47 pm-12:55 pm
1 stop16h 08m
San Diego
mié. 2/5
4:21 pm-5:31 am
1 stop11h 10m
ChicagoSan Diego
ORD - SAN
ORDSAN
Chicago O'Hare Intl
vie. 1/31
8:46 pm-7:45 am
1 stop12h 59m
San Diego
mar. 2/4
7:26 pm-5:31 am
1 stop8h 05m
St. LouisSan Diego
STL - SAN
STLSAN
Lambert-St Louis
sáb. 3/8
7:04 pm-12:14 am
1 stop7h 10m
San Diego
jue. 3/13
6:25 am-9:16 am
1 stop24h 51m
MolineSan Diego
MLI - SAN
MLISAN
Moline Quad-City
dom. 2/2
10:07 pm-8:58 am
1 stop12h 51m
San Diego
dom. 2/9
6:15 am-9:17 pm
1 stop13h 02m
PeoriaSan Diego
PIA - SAN
PIASAN
Greater Peoria
mié. 2/12
3:36 pm-11:58 pm
2 stops10h 22m
San Diego
mar. 2/18
8:49 pm-10:20 am
2 stops11h 31m
St. LouisSan Diego
STL - SAN
STLSAN
Lambert-St Louis
mié. 4/16
6:51 pm-12:14 am
1 stop7h 23m
San Diego
mié. 4/23
8:10 am-11:59 pm
2 stops13h 49m
ChicagoSan Diego
MDW - SAN
MDWSAN
Chicago Midway
mar. 2/4
8:15 am-8:19 pm
2 stops14h 04m
San Diego
mié. 2/12
6:15 am-12:17 am
2 stops16h 02m
PeoriaSan Diego
PIA - SAN
PIASAN
Greater Peoria
mar. 4/15
5:00 am-1:51 pm
1 stop10h 51m
San Diego
sáb. 4/26
6:15 am-4:46 pm
1 stop8h 31m
Best time to book a flight from Illinois to San Diego
Have a flexible travel schedule? Discover the best time to fly to San Diego from Illinois with our price prediction graph.
Travel insights for flights from Illinois to San Diego
Get recent, data-driven insights about flights from Illinois to San Diego including ideal travel times, pricing trends, and more.
What is the cheapest month to book a flight from Illinois to San Diego?
Currently, August is the cheapest month in which you can book a flight from Illinois to San Diego (average of $286). Flying from Illinois to San Diego in March is currently the most expensive (average of $366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from IL to SAN?
Find hourly flight availability from Illinois to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated enero 17, 2025.
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.
Weekly flight availability from Illinois to San Diego
Explore weekly flight availability from Illinois to San Diego. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated enero 17, 2025.
The most flights from USIL to SAN are scheduled on a Monday (22 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (15 on average).
Rainfall in San Diego by month
Plan your trip to San Diego by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in San Diego ranges from 0.0 - 2.3 inches per month. February is typically the wettest month, when rainfall can reach 2.3 in. July is typically the driest time to visit San Diego when rainfall is around 0.0 in.
Temperature in San Diego by month
Plan your trip to San Diego by taking into account the average temperature totals by month.
If weather is an important factor for your trip to San Diego, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).
Reviews of airlines servicing San Diego
Get insights into the airlines that provide service to San Diego. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Diego. Reviews last updated enero 17, 2025.
To help decide which airline to fly from Illinois to San Diego, see what other customers have to say about Southwest, Spirit Airlines and Frontier. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
Comfort
Food
Overall
Boarding
Entertainment
Reviews
Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
Crew
Comfort
Food
Overall
Boarding
Entertainment
Reviews
Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
Crew
Comfort
Food
Overall
Boarding
Entertainment
Reviews
Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
Crew
Comfort
Food
Overall
Boarding
Entertainment
Reviews
Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
Crew
Comfort
Food
Overall
Boarding
Entertainment
Reviews
Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
Crew
Comfort
Food
Overall
Boarding
Entertainment
Reviews
Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
Related info for your journey
Find useful and relevant information for your journey from Illinois to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Illinois to San Diego
See prices for flight routes from nearby airports that may be better suited for you.
Top 7 airlines flying from Illinois to San Diego
Discover the top 7 airlines that operate flights from Illinois to San Diego. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated enero 17, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$103 | Average$220 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$106 | Average$191 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$144 | Average$408 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$185 | Average$451 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$201 | Average$483 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$246 | Average$461 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$399 | Average$698 | FlexibilityNo cancel fee | On-time75% |