$44+ Cheap flights from Illinois to San Francisco Bay Area
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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SFO
feb. 25 — mar. 41
1 adult, Economy
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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 Francisco Bay Area
Keep the following information in mind while searching for Illinois to San Francisco Bay Area flight deals. Data was last updated febrero 20, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $115 (Cheapflightsfares) |
One-way from | $44 (FlightHub) |
Popular in | March |
Cheapest in | April |
Average price | $297 |
Find flight deals from Illinois to San Francisco Bay Area
Cheapest flights from Illinois to San Francisco Bay AreaExplore the most affordable flight options available from Illinois to San Francisco Bay Area. Find the lowest fares from popular airlines and budget airlines, with prices last updated on febrero 20, 2025.
Explore the most affordable flight options available from Illinois to San Francisco Bay Area. Find the lowest fares from popular airlines and budget airlines, with prices last updated on febrero 20, 2025.
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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.
mar. 4/158:00 amORD - OAK
1 stop11h 35mSpirit Airlines
mar. 4/226:40 pmOAK - ORD
1 stop9h 53mSpirit Airlines
Deal found 2/20![Spirit Airlines logo]()
$115
This CheapOair deal was found by Cheapflights users on 2/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/56:50 amORD - SJC
1 stop10h 13mFrontier
jue. 3/131:00 pmSJC - ORD
1 stop14h 10mFrontier
Deal found 2/18![Frontier logo]()
$140
This CheapOair deal was found by Cheapflights users on 2/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/2410:27 pmORD - SJC
1 stop17h 07mSpirit Airlines
mar. 4/12:29 pmSJC - ORD
1 stop20h 24mSpirit Airlines
Deal found 2/19![Spirit Airlines logo]()
$144
This Frontier deal was found by Cheapflights users on 2/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 3/156:40 amMDW - SJC
1 stop10h 23mFrontier
mié. 3/194:03 pmSJC - MDW
1 stop6h 14mFrontier
Deal found 2/18![Frontier logo]()
$150
This CheapOair deal was found by Cheapflights users on 2/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/2411:53 amORD - SJC
1 stop8h 44mMultiple Airlines
dom. 4/2712:34 pmSJC - ORD
1 stop9h 06mMultiple Airlines
Deal found 2/19![Multiple Airlines logo]()
$155
This Trip.com deal was found by Cheapflights users on 2/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 3/148:44 pmMDW - SFO
1 stop17h 44mFrontier
lun. 3/178:09 pmSFO - MDW
1 stop7h 22mFrontier
Deal found 2/20![Frontier logo]()
$204
This Expedia deal was found by Cheapflights users on 2/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/137:00 pmORD - SFO
Nonstop5h 10mMultiple Airlines
dom. 3/1612:15 amSFO - ORD
1 stop12h 01mMultiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$204
This Southwest deal was found by Cheapflights users on 2/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/1212:35 pmMDW - SFO
Nonstop4h 45mSouthwest
mar. 3/187:55 pmSFO - MDW
1 stop7h 20mSouthwest
Deal found 2/18![Southwest logo]()
$207
This Alaska Airlines deal was found by Cheapflights users on 2/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/156:56 pmORD - SFO
Nonstop4h 59mAlaska Airlines
mar. 4/296:49 pmSFO - ORD
1 stop9h 16mAlaska Airlines
Deal found 2/20![Alaska Airlines logo]()
$207
This United Airlines deal was found by Cheapflights users on 2/20. 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.
sáb. 4/55:00 amORD - SFO
1 stop6h 36mUnited Airlines
vie. 4/1112:08 amSFO - ORD
Nonstop4h 22mUnited Airlines
Deal found 2/20![United Airlines logo]()
$208
This Frontier deal was found by Cheapflights users on 2/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/74:26 pmORD - SFO
1 stop7h 23mFrontier
mar. 4/1510:30 pmSFO - ORD
1 stop10h 10mFrontier
Deal found 2/19![Frontier logo]()
$210
This Southwest deal was found by Cheapflights users on 2/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/116:30 pmMDW - OAK
1 stop6h 40mSouthwest
mié. 3/126:15 amOAK - MDW
1 stop6h 50mSouthwest
Deal found 2/18![Southwest logo]()
$212
Find flights from Illinois to San Francisco Bay Area within your budget
Customize your flight search to find flights from Illinois to San Francisco Bay Area 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 febrero 20, 2025.
Fly from
Illinois
Fly to
San Francisco Bay Area
Route
Depart
Return
Price
ChicagoOakland
ORD - OAK
ORDOAK
Chicago O'Hare Intl
mar. 4/15
8:00 am-5:35 pm
1 stop11h 35m
Oakland
mar. 4/22
6:40 pm-6:33 am
1 stop9h 53m
$115
ChicagoSan Jose
ORD - SJC
ORDSJC
Chicago O'Hare Intl
mié. 3/5
6:50 am-3:03 pm
1 stop10h 13m
San Jose
jue. 3/13
1:00 pm-5:10 am
1 stop14h 10m
$140
ChicagoSan Jose
ORD - SJC
ORDSJC
Chicago O'Hare Intl
lun. 3/24
10:27 pm-1:34 pm
1 stop17h 07m
San Jose
mar. 4/1
2:29 pm-12:53 pm
1 stop20h 24m
$144
ChicagoSan Jose
MDW - SJC
MDWSJC
Chicago Midway
sáb. 3/15
6:40 am-3:03 pm
1 stop10h 23m
San Jose
mié. 3/19
4:03 pm-12:17 am
1 stop6h 14m
$150
ChicagoSan Jose
ORD - SJC
ORDSJC
Chicago O'Hare Intl
jue. 4/24
11:53 am-6:37 pm
1 stop8h 44m
San Jose
dom. 4/27
12:34 pm-11:40 pm
1 stop9h 06m
$155
ChicagoSan Francisco
ORD - SFO
ORDSFO
Chicago O'Hare Intl
jue. 3/13
7:00 pm-10:10 pm
Nonstop5h 10m
San Francisco
dom. 3/16
12:15 am-2:16 pm
1 stop12h 01m
$204
ChicagoSan Francisco
MDW - SFO
MDWSFO
Chicago Midway
vie. 3/14
8:44 pm-12:28 pm
1 stop17h 44m
San Francisco
lun. 3/17
8:09 pm-5:31 am
1 stop7h 22m
$204
ChicagoSan Francisco
MDW - SFO
MDWSFO
Chicago Midway
mié. 3/12
12:35 pm-3:20 pm
Nonstop4h 45m
San Francisco
mar. 3/18
7:55 pm-5:15 am
1 stop7h 20m
$207
ChicagoSan Francisco
ORD - SFO
ORDSFO
Chicago O'Hare Intl
mar. 4/15
6:56 pm-9:55 pm
Nonstop4h 59m
San Francisco
mar. 4/29
6:49 pm-6:05 am
1 stop9h 16m
$207
ChicagoSan Francisco
ORD - SFO
ORDSFO
Chicago O'Hare Intl
sáb. 4/5
5:00 am-9:36 am
1 stop6h 36m
San Francisco
sáb. 4/12
5:05 pm-11:27 pm
Nonstop4h 22m
$208
Showing 1-10 of 60 results
Best time to book a flight from Illinois to San Francisco Bay Area
Have a flexible travel schedule? Discover the best time to fly to San Francisco Bay Area from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Travel insights for flights from Illinois to San Francisco Bay Area
Get recent, data-driven insights about flights from Illinois to San Francisco Bay Area including ideal travel times, pricing trends, and more.
What is the cheapest month to book a flight from Illinois to San Francisco Bay Area?
Currently, January is the cheapest month in which you can book a flight from Illinois to San Francisco Bay Area (average of $276). Flying from Illinois to San Francisco Bay Area in June is currently the most expensive (average of $403). 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 XIH?
Find hourly flight availability from Illinois to San Francisco Bay Area. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated febrero 20, 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 Francisco Bay Area as you normally would.
Weekly flight availability from Illinois to San Francisco Bay Area
Explore weekly flight availability from Illinois to San Francisco Bay Area. 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 febrero 20, 2025.
The most flights from USIL to zzXIH are scheduled on a Monday (63 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (28 on average).
Rainfall in San Francisco Bay Area by month
Plan your trip to San Francisco Bay Area by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in San Francisco Bay Area ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco Bay Area when rainfall is around 0.0 in.
Temperature in San Francisco Bay Area by month
Plan your trip to San Francisco Bay Area by taking into account the average temperature totals by month.
If weather is an important factor for your trip to San Francisco Bay Area, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).
Reviews of airlines servicing San Francisco Bay Area
Get insights into the airlines that provide service to San Francisco Bay Area. 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 Francisco Bay Area. Reviews last updated febrero 20, 2025.
To help decide which airline to fly from Illinois to San Francisco Bay Area, see what other customers have to say about Southwest, Alaska Airlines and Delta. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.6
Food
7.1
Crew
8.7
Overall
8.1
Comfort
8.1
Boarding
8.2
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Entertainment
7.6
Food
7.1
Crew
8.7
Overall
8.1
Comfort
8.1
Boarding
8.2
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Entertainment
7.6
Food
7.1
Crew
8.7
Overall
8.1
Comfort
8.1
Boarding
8.2
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Entertainment
7.6
Food
7.1
Crew
8.7
Overall
8.1
Comfort
8.1
Boarding
8.2
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Entertainment
7.6
Food
7.1
Crew
8.7
Overall
8.1
Comfort
8.1
Boarding
8.2
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Entertainment
7.6
Food
7.1
Crew
8.7
Overall
8.1
Comfort
8.1
Boarding
8.2
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Related info for your journey
Find useful and relevant information for your journey from Illinois to San Francisco Bay Area. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Illinois to San Francisco Bay Area
See prices for flight routes from nearby airports that may be better suited for you.
Top 7 airlines flying from Illinois to San Francisco Bay Area
Discover the top 7 airlines that operate flights from Illinois to San Francisco Bay Area. 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 febrero 20, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$88 | Average$217 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$128 | Average$448 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$133 | Average$247 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$140 | Average$346 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$141 | Average$486 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$198 | Average$495 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$247 | Average$433 | FlexibilityNo cancel fee | On-time63% |