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$65+ 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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SFO
Dec 28 — Jan 41
Sat 12/28
Sat 1/4
1 adult, Economy
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Cheap flight deals from Illinois to San Francisco Bay Area

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to San Francisco Bay Area (zzXIH). 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 December 23, 2024.

Round-trip from

$129
(eDestinos)

One-way from

$65
(Cheapflightsfares)
From Illinois to San Francisco Bay Area
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One-way flight from Illinois to San Francisco Bay Area
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Find flight deals from Illinois to San Francisco Bay Area

Cheapest flights from Illinois to San Francisco Bay Area
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 December 23, 2024.

This Frontier deal was found by Cheapflights users on 12/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/239:29 pmSTL - SFO
1 stop12h 23mFrontier
Thu 1/99:10 pmSFO - STL
1 stop9h 56mFrontier
Deal found 12/22$278
This FlightHub deal was found by Cheapflights users on 12/22. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2510:00 amORD - SFO
1 stop14h 51mMultiple Airlines
Wed 1/16:00 amSFO - ORD
1 stop15h 46mMultiple Airlines
Deal found 12/22$307
This FlightHub deal was found by Cheapflights users on 12/22. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2310:04 pmMDW - SFO
1 stop28h 17mFrontier
Thu 1/169:10 pmSFO - MDW
1 stop25h 07mFrontier
Deal found 12/22$310
This Delta deal was found by Cheapflights users on 12/22. 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.
Sun 12/226:40 pmSTL - SFO
1 stop7h 10mDelta
Wed 1/85:55 amSFO - STL
1 stop8h 47mDelta
Deal found 12/22$342
This Gotogate deal was found by Cheapflights users on 12/21. 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.
Mon 12/309:29 pmSTL - SJC
1 stop18h 20mFrontier
Thu 1/212:40 pmSJC - STL
1 stop17h 33mFrontier
Deal found 12/21$363
This American Airlines deal was found by Cheapflights users on 12/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/255:21 amSTL - SJC
1 stop7h 35mAmerican Airlines
Sun 12/296:10 amSJC - STL
1 stop8h 29mAmerican Airlines
Deal found 12/22$368
This Delta deal was found by Cheapflights users on 12/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/243:29 pmSTL - OAK
2 stops9h 44mDelta
Mon 12/305:30 amOAK - STL
1 stop5h 50mDelta
Deal found 12/23$373
This FlightHub deal was found by Cheapflights users on 12/22. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/299:54 pmORD - SJC
1 stop11h 52mMultiple Airlines
Mon 12/3012:30 pmSJC - ORD
1 stop9h 16mMultiple Airlines
Deal found 12/22$378
This FlightHub deal was found by Cheapflights users on 12/22. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/299:54 pmORD - SJC
1 stop11h 52mSpirit Airlines
Tue 12/314:29 pmSJC - ORD
1 stop11h 01mSpirit Airlines
Deal found 12/22$386
This Kiwi.com deal was found by Cheapflights users on 12/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/316:55 amORD - SFO
1 stop10h 02mFrontier
Mon 1/66:00 amSFO - ORD
1 stop15h 46mFrontier
Deal found 12/22$391
This Southwest deal was found by Cheapflights users on 12/22. 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.
Sun 12/228:35 pmSTL - SFO
1 stop13h 10mSouthwest
Tue 12/318:15 amSFO - STL
1 stop8h 00mSouthwest
Deal found 12/22$402
This American Airlines deal was found by Cheapflights users on 12/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/229:00 pmORD - SFO
Nonstop4h 59mAmerican Airlines
Wed 1/155:20 amSFO - ORD
Nonstop4h 16mAmerican Airlines
Deal found 12/22$403

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 December 23, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoOakland

ORD - OAK

ORDOAK

Chicago O'Hare Intl

Wed 2/12

1:32 pm-10:12 pm

1 stop10h 40m

Oakland

Wed 2/26

5:10 am-9:44 pm

1 stop14h 34m

$129

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Wed 1/22

7:09 pm-12:11 pm

1 stop19h 02m

San Jose

Fri 1/31

1:11 pm-9:16 am

1 stop18h 05m

$137

ChicagoSan Jose

ORD - SJC

ORDSJC

Chicago O'Hare Intl

Thu 1/9

10:47 pm-4:14 pm

2 stops19h 27m

San Jose

Wed 1/15

4:38 pm-5:31 am

2 stops10h 53m

$187

ChicagoSan Jose

ORD - SJC

ORDSJC

Chicago O'Hare Intl

Fri 2/7

10:47 pm-10:41 am

1 stop13h 54m

San Jose

Sun 2/16

1:00 pm-5:05 am

1 stop14h 05m

$197

ChicagoSan Jose

MDW - SJC

MDWSJC

Chicago Midway

Thu 2/6

7:15 am-12:11 pm

1 stop6h 56m

San Jose

Thu 2/13

8:59 am-12:17 am

2 stops13h 18m

$197

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Fri 2/21

7:00 pm-10:10 pm

Nonstop5h 10m

San Francisco

Tue 3/4

10:46 am-4:58 pm

Nonstop4h 12m

$207

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Thu 1/23

8:30 am-11:24 am

Nonstop4h 54m

San Francisco

Wed 2/26

1:30 pm-7:45 pm

Nonstop4h 15m

$208

ChicagoSan Francisco

MDW - SFO

MDWSFO

Chicago Midway

Mon 1/13

7:15 am-12:46 pm

1 stop7h 31m

San Francisco

Sun 1/19

11:23 am-10:22 pm

1 stop8h 59m

$208

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Fri 1/10

6:49 pm-12:11 am

1 stop7h 22m

San Francisco

Fri 1/17

9:10 pm-9:16 am

1 stop10h 06m

$208

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Fri 1/10

7:25 am-12:11 am

1 stop18h 46m

San Francisco

Sun 1/12

9:10 pm-2:20 pm

1 stop15h 10m

$210

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/23

Showing 1-10 of 60 results
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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 $406). 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 December 23, 2024.

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 December 23, 2024.

The most flights from USIL to zzXIH are scheduled on a Monday (77 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (42 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 December 23, 2024.
To help decide which airline to fly from Illinois to San Francisco Bay Area, see what other customers have to say about American Airlines, Delta and Alaska Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,780 reviews

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

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

Southwest
8.1
Very good
4,780 reviews
Southwest
8.1
Very good
4,780 reviews

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

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

Alaska Airlines
8.0
Very good
9,549 reviews
Southwest
8.1
Very good
4,780 reviews

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

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

Delta
8.0
Very good
8,588 reviews
Southwest
8.1
Very good
4,780 reviews

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

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

JetBlue
7.4
Good
3,263 reviews
Southwest
8.1
Very good
4,780 reviews

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

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

United Airlines
7.4
Good
9,020 reviews
Southwest
8.1
Very good
4,780 reviews

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

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 Francisco Bay Area. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Illinois to San Francisco Bay Area one-way?

    The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $65. However, be on the lookout for offers from Frontier and Southwest, as they are both options that can get you from Illinois to San Francisco Bay Area for a low price.

  • Can I find deals for flights from Illinois to San Francisco Bay Area that include hotel bookings?

    Yes. In addition to deals on Illinois to San Francisco Bay Area flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to San Francisco Bay Area?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to San Francisco Bay Area.

  • Can I find deals for business class flights from Illinois to San Francisco Bay Area?

    Yes. Cheapflights offers flight deals from Illinois to San Francisco Bay Area by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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 $406). 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.

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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.
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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 December 23, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$90Average$215FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$133Average$246FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$140Average$405FlexibilityNo cancel feeOn-time75%
DeltaCheapest$174Average$381FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$178Average$487FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$179Average$471FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$242Average$422FlexibilityNo cancel feeOn-time63%
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