How long does it take to fly to San Francisco?

Flight times from Illinois to San Francisco vary, but if you’re flying out of Chicago and flying into San Francisco (one of the most popular routes), then the duration is 4h 38m on average. Another popular route from Illinois to San Francisco is flying from Moline to San Francisco, which will take roughly 7h 03m. Keep in mind that layovers or delays could extend your travel time.

How many flights depart from Illinois to San Francisco on average per week?

As of November 2025, there are 383 flights per week flying from Illinois to San Francisco. The most common day of the week flights depart is Mon, with 19% of flights taking off on this day.

What airlines fly to San Francisco?

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to San Francisco from Illinois according to our data. United Airlines is the first choice among our users, with 46% of people opting to fly with this airline when traveling to San Francisco. Keep in mind that there are 9 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.

How many flights depart from Illinois to San Francisco on average per day?

54 flights are operational daily from Illinois to San Francisco as of November 2025. The most popular departure time for this route is 5:00PM, with 51% of flights per day taking off in the afternoon.

What is the cheapest airline that flies from Illinois to San Francisco?

Frontier and Alaska Airlines are the most popular carriers operating from Illinois to San Francisco

When did momondo last update prices for flights from Illinois to San Francisco Airport?

Prices for flights from Illinois to San Francisco Airport refresh daily.

How many operators does momondo search for flights from Illinois to San Francisco Airport?

As of November 2025, there are 8 operators available to choose from for flights from Illinois to San Francisco Airport.

How old do you have to be to fly from Illinois to San Francisco Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to San Francisco Airport.

What documentation or ID do you need to fly to San Francisco Airport?

The required travel and health documents for your San Francisco Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Francisco Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$62 Cheap Flights from Illinois to San Francisco in 2025/26

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Find the cheapest flights from Illinois to San Francisco

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One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

7:45 pm - 8:08 amSTL-SFO

14h 23m1 stop

10:03 pm - 10:02 amSFO-STL

9h 59m2 stops

$194Frontier

Find Deal

Wed, Nov 19 - Sun, Nov 23

10:10 pm - 7:48 amSTL-SFO

11h 38m1 stop

5:46 pm - 8:52 pmSFO-STL

25h 06m1 stop

$200Frontier

Find Deal

Sat, Dec 20 - Thu, Jan 8

2:50 pm - 8:47 amSTL-SFO

19h 57m2 stops

8:43 am - 4:49 pmSFO-STL

6h 06m1 stop

$230Multiple Airlines

Find Deal

Tue, Jan 27 - Sun, Feb 1

7:43 pm - 12:24 amSTL-SFO

6h 41m1 stop

2:21 pm - 2:27 pmSFO-STL

22h 06m1 stop

$257Multiple Airlines

Find Deal

Sat, Dec 6 - Mon, Dec 8

8:59 pm - 11:03 amORD-SFO

16h 04m1 stop

7:00 am - 11:50 pmSFO-ORD

14h 50m1 stop

$263Alaska Airlines

Find Deal

Tue, Dec 2 - Mon, Dec 8

8:55 am - 5:24 pmORD-SFO

10h 29m2 stops

10:12 am - 11:37 pmSFO-ORD

11h 25m1 stop

$266Alaska Airlines

Find Deal

Wed, Dec 17 - Wed, Jan 7

5:15 pm - 9:50 pmMDW-SFO

6h 35m1 stop

6:10 am - 12:15 pmSFO-MDW

4h 05mnonstop

$269Southwest

Find Deal

Wed, Dec 3 - Wed, Dec 10

5:31 pm - 11:57 pmORD-SFO

8h 26m1 stop

1:45 pm - 11:59 pmSFO-ORD

8h 14m1 stop

$271Delta

Find Deal

Wed, Dec 24 - Tue, Dec 30

6:35 am - 5:49 pmSTL-SFO

13h 14m2 stops

6:05 am - 9:35 pmSFO-STL

13h 30m2 stops

$274Delta

Find Deal

Fri, Jan 9 - Mon, Jan 12

3:10 pm - 9:15 pmMDW-SFO

8h 05m1 stop

5:05 am - 3:00 pmSFO-MDW

7h 55m1 stop

$279Southwest

Find Deal

Wed, Dec 3 - Wed, Dec 10

Frontier flights from Illinois to San Francisco

Our best Frontier deals on Illinois to San Francisco flight tickets

Frontier

Nov 19

STL7:45 pmLambert-St Louis

14h 23m

1 stop

SFO8:08 amSan Francisco

Nov 23

SFO10:03 pmSan Francisco

9h 59m

2 stops

STL10:02 amLambert-St Louis

$194

Find similar

Frontier

Dec 20

STL10:10 pmLambert-St Louis

11h 38m

1 stop

SFO7:48 amSan Francisco

Jan 8

SFO5:46 pmSan Francisco

25h 06m

1 stop

STL8:52 pmLambert-St Louis

$200

Find similar

Frontier

Dec 18

STL5:19 pmLambert-St Louis

16h 29m

1 stop

SFO7:48 amSan Francisco

Jan 11

SFO4:07 pmSan Francisco

15h 55m

1 stop

STL10:02 amLambert-St Louis

$204

Find similar

Alaska Airlines flights from Illinois to San Francisco

Our best Alaska Airlines deals on Illinois to San Francisco flight tickets

Alaska Airlines

Dec 2

ORD8:59 pmChicago O'Hare Intl

16h 04m

1 stop

SFO11:03 amSan Francisco

Dec 8

SFO7:00 amSan Francisco

14h 50m

1 stop

ORD11:50 pmChicago O'Hare Intl

$263

Find similar

Alaska Airlines

Dec 17

ORD8:55 amChicago O'Hare Intl

10h 29m

2 stops

SFO5:24 pmSan Francisco

Jan 7

SFO10:12 amSan Francisco

11h 25m

1 stop

ORD11:37 pmChicago O'Hare Intl

$266

Find similar

Alaska Airlines

Dec 24

ORD6:08 pmChicago O'Hare Intl

17h 25m

1 stop

SFO9:33 amSan Francisco

Jan 19

SFO8:20 amSan Francisco

28h 09m

1 stop

ORD2:29 pmChicago O'Hare Intl

$267

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 11/19

7:45 pm-8:08 am

1 stop14h 23m

San Francisco

Sun 11/23

10:03 pm-10:02 am

2 stops9h 59m

$194

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Sat 12/20

10:10 pm-7:48 am

1 stop11h 38m

San Francisco

Thu 1/8

5:46 pm-8:52 pm

1 stop25h 06m

$200

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Tue 1/27

2:50 pm-8:47 am

2 stops19h 57m

San Francisco

Sun 2/1

8:43 am-4:49 pm

1 stop6h 06m

$230

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Sat 12/6

7:43 pm-12:24 am

1 stop6h 41m

San Francisco

Mon 12/8

2:21 pm-2:27 pm

1 stop22h 06m

$257

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Tue 12/2

8:59 pm-11:03 am

1 stop16h 04m

San Francisco

Mon 12/8

7:00 am-11:50 pm

1 stop14h 50m

$263

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Wed 12/17

8:55 am-5:24 pm

2 stops10h 29m

San Francisco

Wed 1/7

10:12 am-11:37 pm

1 stop11h 25m

$266

ChicagoSan Francisco

MDW - SFO

MDWSFO

Chicago Midway

Wed 12/3

5:15 pm-9:50 pm

1 stop6h 35m

San Francisco

Wed 12/10

6:10 am-12:15 pm

Nonstop4h 05m

$269

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Wed 12/24

5:31 pm-11:57 pm

1 stop8h 26m

San Francisco

Tue 12/30

1:45 pm-11:59 pm

1 stop8h 14m

$271

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Fri 1/9

6:35 am-5:49 pm

2 stops13h 14m

San Francisco

Mon 1/12

6:05 am-9:35 pm

2 stops13h 30m

$274

ChicagoSan Francisco

MDW - SFO

MDWSFO

Chicago Midway

Wed 12/3

3:10 pm-9:15 pm

1 stop8h 05m

San Francisco

Wed 12/10

5:05 am-3:00 pm

1 stop7h 55m

$279

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How to get the cheapest flight ticket from Illinois to San Francisco

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to San Francisco?

If you aren’t able to travel to San Francisco during the month of July, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $288.

What is the cheapest day to depart on your flight to San Francisco?

The cheapest day to depart from Illinois to San Francisco is on a Thursday when prices can be found for as low as $352. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $538.

What is the cheapest time of day to depart on your flight to San Francisco?

Our data shows that the cheapest Illinois to San Francisco flights are usually those with departure times in the evening. Our users have found flights to San Francisco in the evening for as low as $373. Flights in the afternoon are often more expensive with an average ticket price of $487.

What is the cheapest Illinois to San Francisco flight route?

Fly from Chicago O'Hare Intl to San Francisco for the best Illinois - San Francisco flight prices

How far in advance should I book a flight to San Francisco?

You are more likely to see cheaper flights to San Francisco from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $324 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Illinois for as low as $283 on momondo.

What cabin class options are available on Illinois to San Francisco flights?

There are 4 cabin classes available to choose from on Illinois to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to San Francisco flights?

You could potentially save up to 8% on your flight if you consider stops on a Illinois to San Francisco flight.

Cheap Illinois to San Francisco flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to San Francisco

Best Price Found	$196
Fastest flight time	4h 25m
Direct flights	Every day
Airports in San Francisco	1 airport

The best one-way flight to San Francisco from Illinois in the past 72 hours is $196. The best round-trip flight deal from Illinois to San Francisco found on momondo in the last 72 hours is $309.

The fastest flight from Illinois to San Francisco takes 4h 25m

Direct flights go from Illinois to San Francisco every day.

There is 1 airport near San Francisco: San Francisco (SFO)

Search flight deals

When did momondo last update prices for flights from Illinois to San Francisco Airport?
Prices for flights from Illinois to San Francisco Airport refresh daily.
How many operators does momondo search for flights from Illinois to San Francisco Airport?
As of November 2025, there are 8 operators available to choose from for flights from Illinois to San Francisco Airport.
How old do you have to be to fly from Illinois to San Francisco Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to San Francisco Airport.
What documentation or ID do you need to fly to San Francisco Airport?
The required travel and health documents for your San Francisco Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Francisco Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Illinois to San Francisco?
Based on momondo bookings for flights between Illinois and San Francisco, the leading plane model is Boeing 757-300, making up 21.05% of the total bookings. Other popular models include Airbus A321neo with 21.03%, Boeing 737-800 with 18.83%, and Boeing 737 MAX 9 with 8.00%.

Best airlines flying from Illinois to San Francisco

Compare and see reviews for airlines that fly from Illinois to San Francisco with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $90	Free Cancellation	Rating 5.8 3,117 reviews	Search Frontier flights
Hawaiian Airlines	PriceFrom $108	Free Cancellation	Rating 7.8 2,800 reviews	Search Hawaiian Airlines flights
Sun Country Air	PriceFrom $112	Free Cancellation	Rating 6.9 335 reviews	Search Sun Country Air flights
Delta	PriceFrom $128	Free Cancellation	Rating 7.9 8,003 reviews	Search Delta flights
Southwest	PriceFrom $138	Free Cancellation	Rating 8.0 4,239 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $192	Free Cancellation	Rating 8.0 11,242 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $197	Free Cancellation	Rating 7.2 11,040 reviews	Search American Airlines flights
United Airlines	PriceFrom $203	Free Cancellation	Rating 7.4 9,001 reviews	Search United Airlines flights

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Sonoma

Bodega Bay

Roseville

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Hayward

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Fremont

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Half Moon Bay

Salinas

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Pacific Grove

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to San Francisco?

It is quick and easy to find Illinois to San Francisco flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Francisco that suits you.

Can I find flights from Illinois to San Francisco with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Illinois to San Francisco flights to just show those with flexible booking policies.

How can momondo help me find flights from Illinois to San Francisco?

Once you have performed a search for Illinois to San Francisco flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Illinois to San Francisco right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to San Francisco from Illinois. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your San Francisco trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

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Flights to Bostonfrom $40

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Flights to Dallasfrom $49

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Flights to Denverfrom $47

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Cheap flights from Illinois to San Francisco from $62

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to San Francisco departing on 1/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names and deals

Filter for what you want

Filter for what you want

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Find the cheapest flights from Illinois to San Francisco

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Frontier flights from Illinois to San Francisco

Our best Frontier deals on Illinois to San Francisco flight tickets

Alaska Airlines flights from Illinois to San Francisco

Our best Alaska Airlines deals on Illinois to San Francisco flight tickets

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Use the filters below to find and compare flights from Illinois to San Francisco that are best for you.

See travel insights to San Francisco from

How to get the cheapest flight ticket from Illinois to San Francisco

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Francisco?

If you aren’t able to travel to San Francisco during the month of July, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $288.

What is the cheapest day to depart on your flight to San Francisco?

The cheapest day to depart from Illinois to San Francisco is on a Thursday when prices can be found for as low as $352. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $538.

What is the cheapest time of day to depart on your flight to San Francisco?

Our data shows that the cheapest Illinois to San Francisco flights are usually those with departure times in the evening. Our users have found flights to San Francisco in the evening for as low as $373. Flights in the afternoon are often more expensive with an average ticket price of $487.

What is the cheapest Illinois to San Francisco flight route?

Fly from Chicago O'Hare Intl to San Francisco for the best Illinois - San Francisco flight prices

How far in advance should I book a flight to San Francisco?

What cabin class options are available on Illinois to San Francisco flights?

There are 4 cabin classes available to choose from on Illinois to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to San Francisco flights?

You could potentially save up to 8% on your flight if you consider stops on a Illinois to San Francisco flight.

What is the cheapest airline that flies from Illinois to San Francisco?

Frontier and Alaska Airlines are the most popular carriers operating from Illinois to San Francisco

What airlines fly to San Francisco?

How many flights depart from Illinois to San Francisco on average per day?

54 flights are operational daily from Illinois to San Francisco as of November 2025. The most popular departure time for this route is 5:00PM, with 51% of flights per day taking off in the afternoon.

How many flights depart from Illinois to San Francisco on average per week?

As of November 2025, there are 383 flights per week flying from Illinois to San Francisco. The most common day of the week flights depart is Mon, with 19% of flights taking off on this day.

How long does it take to fly to San Francisco?

Cheap Illinois to San Francisco flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to San Francisco

Best Price Found

Fastest flight time

Direct flights

Airports in San Francisco

When did momondo last update prices for flights from Illinois to San Francisco Airport?

How many operators does momondo search for flights from Illinois to San Francisco Airport?

How old do you have to be to fly from Illinois to San Francisco Airport?

What documentation or ID do you need to fly to San Francisco Airport?

What is the most popular plane model from Illinois to San Francisco?

Best airlines flying from Illinois to San Francisco

Compare and see reviews for airlines that fly from Illinois to San Francisco with momondo

Traveling to a place near San Francisco?

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to San Francisco?

Can I find flights from Illinois to San Francisco with flexible booking policies on momondo?

How can momondo help me find flights from Illinois to San Francisco?

I’m not ready to book a flight from Illinois to San Francisco right now. Can momondo alert me if prices change?

An easier way to manage your San Francisco trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing California