$42+ Cheap flights from San Francisco Bay Area to Illinois
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 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ORD
Feb 28 — Mar 71
1 adult, Economy
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Find cheap flights from San Francisco Bay Area to Illinois 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
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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 San Francisco Bay Area to Illinois
Keep the following information in mind while searching for San Francisco Bay Area to Illinois flight deals. Data was last updated February 23, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $115 (Cheapflightsfares) |
One-way from | $42 (FlightHub) |
Popular in | December |
Cheapest in | February |
Average price | $297 |
Find flight deals from San Francisco Bay Area to Illinois
Cheapest flights from San Francisco Bay Area to IllinoisExplore the most affordable flight options available from San Francisco Bay Area to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 23, 2025.
Explore the most affordable flight options available from San Francisco Bay Area to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 23, 2025.
This Cheapflightsfares deal was found by Cheapflights users on 2/23. 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.
Mon 4/288:37 pmOAK - ORD
1 stop7h 56mSpirit Airlines
Wed 5/73:21 pmORD - OAK
1 stop6h 53mSpirit Airlines
Deal found 2/23![Spirit Airlines logo]()
$115
This Delta deal was found by Cheapflights users on 2/22. 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.
Tue 4/1511:45 amSJC - ORD
2 stops11h 08mDelta
Tue 4/222:15 pmORD - SJC
2 stops10h 34mDelta
Deal found 2/22![Delta logo]()
$194
This Gotogate deal was found by Cheapflights users on 2/22. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/264:03 pmSJC - MDW
1 stop6h 14mFrontier
Sun 3/308:44 pmMDW - SJC
1 stop23h 55mFrontier
Deal found 2/22![Frontier logo]()
$200
This Gotogate deal was found by Cheapflights users on 2/22. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/264:03 pmSJC - ORD
1 stop6h 41mFrontier
Sun 3/307:59 pmORD - SJC
1 stop24h 40mFrontier
Deal found 2/22![Frontier logo]()
$200
This Mytrip deal was found by Cheapflights users on 2/23. 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.
Fri 3/217:54 pmSJC - ORD
2 stops31h 52mSpirit Airlines
Tue 3/259:57 pmORD - SJC
1 stop17h 37mSpirit Airlines
Deal found 2/23![Spirit Airlines logo]()
$201
This Cheapflightsfares deal was found by Cheapflights users on 2/23. 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.
Fri 3/218:10 pmSFO - ORD
1 stop15h 10mFrontier
Fri 3/286:30 amORD - SFO
1 stop9h 03mFrontier
Deal found 2/23![Frontier logo]()
$203
This Travelocity deal was found by Cheapflights users on 2/23. 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.
Fri 4/2510:40 pmSFO - ORD
1 stop11h 49mMultiple Airlines
Tue 4/296:58 pmORD - SFO
Nonstop4h 59mMultiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$204
This Alaska Airlines deal was found by Cheapflights users on 2/22. 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.
Tue 4/811:52 amSFO - ORD
Nonstop4h 24mAlaska Airlines
Tue 4/156:56 pmORD - SFO
Nonstop4h 59mAlaska Airlines
Deal found 2/22![Alaska Airlines logo]()
$207
This Cheapflightsfares deal was found by Cheapflights users on 2/22. 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.
Mon 4/78:18 pmSFO - MDW
1 stop7h 05mFrontier
Wed 4/1612:46 pmMDW - SFO
1 stop10h 01mFrontier
Deal found 2/22![Frontier logo]()
$208
This CheapOair deal was found by Cheapflights users on 2/22. 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.
Sat 3/13:28 pmSJC - ORD
1 stop12h 00mMultiple Airlines
Wed 3/126:45 amORD - SJC
1 stop10h 18mMultiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$213
This United Airlines deal was found by Cheapflights users on 2/22. 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.
Mon 4/75:15 amSFO - ORD
Nonstop4h 21mUnited Airlines
Sat 4/125:00 amORD - SFO
1 stop6h 36mUnited Airlines
Deal found 2/22![United Airlines logo]()
$217
This Southwest deal was found by Cheapflights users on 2/22. 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.
Tue 5/65:50 amOAK - MDW
Nonstop4h 10mSouthwest
Fri 5/99:10 pmMDW - OAK
Nonstop4h 35mSouthwest
Deal found 2/22![Southwest logo]()
$227
Find flights from San Francisco Bay Area to Illinois within your budget
Customize your flight search to find flights from San Francisco Bay Area to Illinois 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 February 23, 2025.
Fly from
San Francisco Bay Area
Fly to
Illinois
Route
Depart
Return
Price
OaklandChicago
OAK - ORD
OAKORD
Oakland
Mon 4/28
8:37 pm-6:33 am
1 stop7h 56m
Chicago O'Hare Intl
Wed 5/7
3:21 pm-8:14 pm
1 stop6h 53m
$115
San JoseChicago
SJC - ORD
SJCORD
San Jose
Tue 4/15
11:45 am-12:53 am
2 stops11h 08m
Chicago O'Hare Intl
Tue 4/22
2:15 pm-10:49 pm
2 stops10h 34m
$194
San JoseChicago
SJC - MDW
SJCMDW
San Jose
Wed 3/26
4:03 pm-12:17 am
1 stop6h 14m
Chicago Midway
Sun 3/30
8:44 pm-6:39 pm
1 stop23h 55m
$200
San JoseChicago
SJC - ORD
SJCORD
San Jose
Wed 3/26
4:03 pm-12:44 am
1 stop6h 41m
Chicago O'Hare Intl
Sun 3/30
7:59 pm-6:39 pm
1 stop24h 40m
$200
San JoseChicago
SJC - ORD
SJCORD
San Jose
Fri 3/21
7:54 pm-5:46 am
2 stops31h 52m
Chicago O'Hare Intl
Tue 3/25
9:57 pm-1:34 pm
1 stop17h 37m
$201
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Fri 3/21
8:10 pm-1:20 pm
1 stop15h 10m
Chicago O'Hare Intl
Fri 3/28
6:30 am-1:33 pm
1 stop9h 03m
$203
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Fri 4/25
10:40 pm-12:29 pm
1 stop11h 49m
Chicago O'Hare Intl
Tue 4/29
6:58 pm-9:57 pm
Nonstop4h 59m
$204
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Tue 4/8
11:52 am-6:16 pm
Nonstop4h 24m
Chicago O'Hare Intl
Tue 4/15
6:56 pm-9:55 pm
Nonstop4h 59m
$207
San FranciscoChicago
SFO - MDW
SFOMDW
San Francisco
Mon 4/7
8:18 pm-5:23 am
1 stop7h 05m
Chicago Midway
Wed 4/16
12:46 pm-8:47 pm
1 stop10h 01m
$208
San JoseChicago
SJC - ORD
SJCORD
San Jose
Sat 3/1
3:28 pm-5:28 am
1 stop12h 00m
Chicago O'Hare Intl
Wed 3/12
6:45 am-3:03 pm
1 stop10h 18m
$213
Showing 1-10 of 60 results
Best time to book a flight from San Francisco Bay Area to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from San Francisco Bay Area 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 San Francisco Bay Area to Illinois
Get recent, data-driven insights about flights from San Francisco Bay Area to Illinois including ideal travel times, pricing trends, and more.
What is the cheapest month to book a flight from San Francisco Bay Area to Illinois?
Currently, August is the cheapest month in which you can book a flight from San Francisco Bay Area to Illinois (average of $245). Flying from San Francisco Bay Area to Illinois in March is currently the most expensive (average of $321). 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 XIH to IL?
Find hourly flight availability from San Francisco Bay Area to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 23, 2025.
When flying from San Francisco Bay Area 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.
Weekly flight availability from San Francisco Bay Area to Illinois
Explore weekly flight availability from San Francisco Bay Area to Illinois. 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 February 23, 2025.
The most flights from zzXIH to USIL are scheduled on a Sunday (59 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (43 on average).
Rainfall in Illinois by month
Plan your trip to Illinois by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.
Temperature in Illinois by month
Plan your trip to Illinois by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated February 23, 2025.
Read reviews from past customers who have flown Southwest, Alaska Airlines and Delta from San Francisco Bay Area to Illinois. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.6
Boarding
8.2
Food
7.1
Overall
8.1
Crew
8.7
Comfort
8.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Entertainment
7.6
Boarding
8.2
Food
7.1
Overall
8.1
Crew
8.7
Comfort
8.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Entertainment
7.6
Boarding
8.2
Food
7.1
Overall
8.1
Crew
8.7
Comfort
8.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Entertainment
7.6
Boarding
8.2
Food
7.1
Overall
8.1
Crew
8.7
Comfort
8.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Entertainment
7.6
Boarding
8.2
Food
7.1
Overall
8.1
Crew
8.7
Comfort
8.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Entertainment
7.6
Boarding
8.2
Food
7.1
Overall
8.1
Crew
8.7
Comfort
8.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Related info for your journey
Find useful and relevant information for your journey from San Francisco Bay Area to Illinois. 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 San Francisco Bay Area to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 7 airlines flying from San Francisco Bay Area to Illinois
Discover the top 7 airlines that operate flights from San Francisco Bay Area to Illinois. 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 February 23, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$74 | Average$227 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$100 | Average$384 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$112 | Average$262 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$185 | Average$474 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$207 | Average$496 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$208 | Average$451 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$235 | Average$410 | FlexibilityNo cancel fee | On-timeN/A |