HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Francisco

$53+ Cheap flights from Illinois to San Francisco (SFO)

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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SFO
Nov 19 — Nov 261
Tue 11/19
Tue 11/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to San Francisco 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 Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to San Francisco (SFO). 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 November 14, 2024.

Find flight deals from Illinois to San Francisco

Cheapest flights from Illinois to San Francisco
Explore the most affordable flight options available from Illinois to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 14, 2024.

This FlightHub deal was found by Cheapflights users on 11/14. 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 12/228:41 pmMDW - SFO
1 stop13h 06mFrontier
Tue 12/3110:41 amSFO - MDW
1 stop11h 46mFrontier
Deal found 11/14$198
This Kiwi.com deal was found by Cheapflights users on 11/13. 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.
Thu 12/125:59 pmORD - SFO
Nonstop4h 59mMultiple Airlines
Mon 12/169:10 pmSFO - ORD
1 stop13h 39mMultiple Airlines
Deal found 11/13$198
This United Airlines deal was found by Cheapflights users on 11/14. 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.
Thu 11/212:20 pmORD - SFO
Nonstop4h 53mUnited Airlines
Sun 11/2410:44 pmSFO - ORD
Nonstop4h 16mUnited Airlines
Deal found 11/14$199
This Cheapflightsfares deal was found by Cheapflights users on 11/14. 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.
Tue 12/178:26 pmORD - SFO
1 stop13h 21mFrontier
Wed 12/253:03 pmSFO - ORD
1 stop26h 31mFrontier
Deal found 11/14$204
This Alaska Airlines deal was found by Cheapflights users on 11/13. 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.
Wed 12/185:59 pmORD - SFO
Nonstop4h 59mAlaska Airlines
Wed 1/15:55 pmSFO - ORD
1 stop9h 35mAlaska Airlines
Deal found 11/13$206
This American Airlines deal was found by Cheapflights users on 11/14. 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.
Sat 12/75:05 amSTL - SFO
1 stop9h 53mAmerican Airlines
Mon 12/910:10 pmSFO - STL
1 stop8h 44mAmerican Airlines
Deal found 11/14$226
This Orbitz deal was found by Cheapflights users on 11/14. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/66:46 pmSTL - SFO
1 stop7h 25mMultiple Airlines
Thu 12/127:30 amSFO - STL
2 stops14h 29mMultiple Airlines
Deal found 11/14$227
This Mytrip deal was found by Cheapflights users on 11/13. 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 12/209:29 pmSTL - SFO
1 stop20h 48mFrontier
Wed 12/253:03 pmSFO - STL
1 stop28h 16mFrontier
Deal found 11/13$235
This Southwest deal was found by Cheapflights users on 11/13. 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.
Wed 12/114:50 pmMDW - SFO
Nonstop4h 40mSouthwest
Tue 12/179:55 amSFO - MDW
1 stop8h 45mSouthwest
Deal found 11/13$237
This United Airlines deal was found by Cheapflights users on 11/13. 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.
Fri 12/206:00 amSTL - SFO
1 stop8h 06mUnited Airlines
Wed 12/256:35 pmSFO - STL
Nonstop3h 53mUnited Airlines
Deal found 11/13$237
This Delta deal was found by Cheapflights users on 11/14. 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.
Sat 12/712:44 pmMDW - SFO
1 stop10h 46mDelta
Mon 12/910:40 pmSFO - MDW
1 stop9h 10mDelta
Deal found 11/14$256
This Delta deal was found by Cheapflights users on 11/14. 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.
Sat 12/75:40 amORD - SFO
1 stop9h 00mDelta
Sun 12/86:00 amSFO - ORD
1 stop6h 38mDelta
Deal found 11/14$256

Find flights from Illinois to San Francisco within your budget

Customize your flight search to find flights from Illinois to San Francisco 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 2,752,363 searches. Data last updated November 14, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoSan Francisco

MDW - SFO

MDWSFO

Chicago Midway

Sun 12/22

8:41 pm-7:47 am

1 stop13h 06m

San Francisco

Tue 12/31

10:41 am-12:27 am

1 stop11h 46m

$198

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Thu 12/12

5:59 pm-8:58 pm

Nonstop4h 59m

San Francisco

Mon 12/16

9:10 pm-12:49 pm

1 stop13h 39m

$198

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Sun 1/5

1:07 pm-12:21 am

1 stop13h 14m

San Francisco

Sat 2/1

10:29 pm-5:25 pm

1 stop16h 56m

$201

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Wed 12/18

5:59 pm-8:58 pm

Nonstop4h 59m

San Francisco

Tue 12/31

8:35 pm-5:30 am

1 stop6h 55m

$206

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Wed 12/18

7:10 am-11:45 am

1 stop6h 35m

San Francisco

Wed 12/25

11:35 pm-5:54 am

Nonstop4h 19m

$207

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Sun 11/24

12:01 pm-2:43 pm

Nonstop4h 42m

San Francisco

Tue 11/26

11:48 pm-6:05 am

Nonstop4h 17m

$218

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Sat 12/7

5:05 am-12:58 pm

1 stop9h 53m

San Francisco

Mon 12/9

10:10 pm-8:54 am

1 stop8h 44m

$226

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Tue 1/14

10:55 am-5:13 pm

1 stop8h 18m

San Francisco

Sat 1/18

1:00 pm-6:59 pm

Nonstop3h 59m

$227

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Fri 12/20

9:29 pm-4:17 pm

1 stop20h 48m

San Francisco

Wed 12/25

3:03 pm-9:19 pm

1 stop28h 16m

$235

ChicagoSan Francisco

MDW - SFO

MDWSFO

Chicago Midway

Wed 12/11

4:50 pm-7:30 pm

Nonstop4h 40m

San Francisco

Mon 12/16

9:55 am-6:40 pm

1 stop6h 45m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/14

Showing 1-10 of 58 results
1
2
3
...
6

Best time to book a flight from Illinois to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco 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

Get recent, data-driven insights about flights from Illinois to San Francisco including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Illinois to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Illinois to San Francisco (average of $276). Flying from Illinois to San Francisco in June is currently the most expensive (average of $381). 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 SFO?

Find hourly flight availability from Illinois to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 14, 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 as you normally would.

Weekly flight availability from Illinois to San Francisco

Explore weekly flight availability from Illinois to San Francisco. 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 November 14, 2024.

The most flights from USIL to SFO are scheduled on a Thursday (71 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (24 on average).

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Francisco 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 when rainfall is around 0.0 in.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Francisco, 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

Get insights into the airlines that provide service to San Francisco. 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. Reviews last updated November 14, 2024.
See what other customers who have flown with Frontier, Delta and United Airlines from Illinois to San Francisco have to say. 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
5,045 reviews

Crew

8.7

Boarding

8.3

Entertainment

7.7

Food

7.2

Comfort

8.1

Overall

8.1

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

Southwest
8.1
Very good
5,045 reviews
Southwest
8.1
Very good
5,045 reviews

Crew

8.7

Boarding

8.3

Entertainment

7.7

Food

7.2

Comfort

8.1

Overall

8.1

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

Alaska Airlines
8.0
Very good
9,439 reviews
Southwest
8.1
Very good
5,045 reviews

Crew

8.7

Boarding

8.3

Entertainment

7.7

Food

7.2

Comfort

8.1

Overall

8.1

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

Delta
8.0
Very good
8,788 reviews
Southwest
8.1
Very good
5,045 reviews

Crew

8.7

Boarding

8.3

Entertainment

7.7

Food

7.2

Comfort

8.1

Overall

8.1

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

Qatar Airways
7.5
Good
3,861 reviews
Southwest
8.1
Very good
5,045 reviews

Crew

8.7

Boarding

8.3

Entertainment

7.7

Food

7.2

Comfort

8.1

Overall

8.1

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

JetBlue
7.5
Good
3,447 reviews
Southwest
8.1
Very good
5,045 reviews

Crew

8.7

Boarding

8.3

Entertainment

7.7

Food

7.2

Comfort

8.1

Overall

8.1

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

Related info for your journey

Find useful and relevant information for your journey from Illinois to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to San Francisco from Illinois?

    If you book a flight to San Francisco from Illinois, you will be flying to San Francisco, which is the city’s only airport. San Francisco (SFO) is located 11.8 mi from the center of San Francisco.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $53. However, be on the lookout for offers from Alaska Airlines and Southwest, as they are both options that can get you from Illinois to San Francisco for a low price.

  • What are the most popular routes from Illinois to San Francisco?

    The most popular route from Illinois to San Francisco is Chicago O'Hare Intl - San Francisco. You may also consider Chicago Midway - San Francisco or Lambert-St Louis - San Francisco.

  • What are the most reliable airlines from Illinois to San Francisco?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to San Francisco on time: ANA (100%), Air China (92%), Japan Airlines (89%).

  • What are the cheapest flights from Illinois to San Francisco?

    While on average a flight from Illinois to San Francisco is generally $999, our data shows the cheapest flight currently is $94. When looking at the most popular route, (Chicago O'Hare Intl - San Francisco), you can expect to pay $146 for that flight.

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

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

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

    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.

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

    Yes. Cheapflights offers flight deals from Illinois to San Francisco 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?

    Currently, January is the cheapest month in which you can book a flight from Illinois to San Francisco (average of $276). Flying from Illinois to San Francisco in June is currently the most expensive (average of $381). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Los Angeles flights
Newark to Los Angeles flights
John F Kennedy Intl to Las Vegas flights
Dallas/Fort Worth to Las Vegas flights
John F Kennedy Intl to San Francisco flights
Dallas/Fort Worth to Los Angeles flights
Seattle to Los Angeles flights
LaGuardia to Los Angeles flights
Newark to Las Vegas flights
O'Hare Intl to Los Angeles flights
Los Angeles to Las Vegas flights
Seattle to Las Vegas flights
San Francisco to Las Vegas flights
Newark to San Francisco flights
Boston to Los Angeles flights
O'Hare Intl to Las Vegas flights
Minneapolis to Las Vegas flights
Hobby to Las Vegas flights
Atlanta to Las Vegas flights
LaGuardia to Las Vegas flights
Denver to Las Vegas flights
Reagan-National to Los Angeles flights
Los Angeles to San Francisco flights
Dulles Intl to Los Angeles flights
Seattle to San Francisco flights
San Francisco to Los Angeles flights
Newark to Santa Ana flights
Dulles Intl to Las Vegas flights
Burbank to Las Vegas flights
Santa Ana to Las Vegas flights
Boston to Las Vegas flights
Los Angeles to San Jose flights
Baltimore to Las Vegas flights
Seattle to Ontario flights
San Jose to Los Angeles flights
Detroit to Las Vegas flights
George Bush Intcntl to Las Vegas flights
Oakland to Los Angeles flights
Baltimore to Los Angeles flights
LaGuardia to San Francisco flights
Los Angeles to Oakland flights
John F Kennedy Intl to San Diego flights
Seattle to San Diego flights
Seattle to Santa Ana flights
Newark to Burbank flights
Atlanta to Los Angeles flights
Love Field to Las Vegas flights
Austin to Las Vegas flights
Philadelphia to Las Vegas flights
Boston to San Francisco flights

Top 6 airlines flying from Illinois to San Francisco

Discover the top 6 airlines that operate flights from Illinois to San Francisco. 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 2,752,363 searches. Data last updated November 14, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$87Average$218FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$140Average$296FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$169Average$445FlexibilityNo cancel feeOn-time71%
DeltaCheapest$174Average$397FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$179Average$444FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$247Average$402FlexibilityNo cancel feeOn-time63%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines