What airlines fly to Illinois?

United Airlines, American Airlines and Alaska Airlines are the top three most popular airlines that fly to Illinois from San Francisco Bay Area according to our data. United Airlines is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 8 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

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

Spirit Airlines, Southwest, and United Airlines are the most popular carriers operating from San Francisco Bay Area to Illinois

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

As of August 2025, 534 flights take off from San Francisco Bay Area and land in Illinois each week. The most common flight departure day for this route is Fri, with 20% of weekly flights taking off on this day.

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

As of August 2025, there are 76 flights per day flying from San Francisco Bay Area to Illinois. The most common time of day flights depart is 8:00AM, with 47% of flights taking off at noon.

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

Prices for flights from San Francisco Bay Area to Illinois are updated daily.

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

As of August 2025, there are 8 operators available to choose from for flights from San Francisco Bay Area to Illinois.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San Francisco Bay Area to Illinois.

What documentation or ID do you need to fly to Illinois?

The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$51 Cheap Flights from San Francisco Bay Area to Illinois in 2025

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Find the cheapest flights from San Francisco Bay Area to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

6:30 am - 9:32 pmOAK-ORD

13h 02m1 stop

11:15 am - 11:32 pmORD-OAK

14h 17m1 stop

$103Spirit Airlines

Find Deal

Sat, Sep 6 - Tue, Sep 9

6:35 am - 9:32 pmSJC-ORD

12h 57m1 stop

9:00 am - 8:00 pmORD-SJC

13h 00m1 stop

$114Spirit Airlines

Find Deal

Sat, Sep 6 - Tue, Sep 9

6:10 am - 12:30 pmSFO-ORD

4h 20mnonstop

3:19 pm - 6:01 pmORD-SFO

4h 42mnonstop

$187American Airlines

Find Deal

Sun, Aug 31 - Sat, Sep 6

6:28 pm - 12:45 amSFO-ORD

4h 17mnonstop

8:50 am - 11:43 amORD-SFO

4h 53mnonstop

$188United Airlines

Find Deal

Sun, Aug 31 - Sat, Sep 6

9:25 am - 3:35 pmSFO-MDW

4h 10mnonstop

3:50 pm - 6:25 pmMDW-SFO

4h 35mnonstop

$188Southwest

Find Deal

Sun, Aug 31 - Tue, Sep 16

11:08 pm - 5:24 amSFO-ORD

4h 16mnonstop

3:19 pm - 6:01 pmORD-SFO

4h 42mnonstop

$192American Airlines

Find Deal

Sat, Aug 30 - Sat, Sep 6

10:45 am - 4:55 pmSFO-MDW

4h 10mnonstop

8:15 am - 10:50 amMDW-SFO

4h 35mnonstop

$197Southwest

Find Deal

Tue, Sep 9 - Sat, Sep 13

4:55 pm - 11:12 pmSFO-ORD

4h 17mnonstop

9:13 pm - 11:59 pmORD-SFO

4h 46mnonstop

$207United Airlines

Find Deal

Mon, Aug 25 - Wed, Aug 27

10:26 am - 11:59 pmSFO-ORD

11h 33m1 stop

8:20 am - 2:01 pmORD-SFO

7h 41m1 stop

$216Alaska Airlines

Find Deal

Wed, Oct 15 - Tue, Oct 21

7:00 am - 11:59 pmSFO-ORD

14h 59m1 stop

2:54 pm - 10:01 pmORD-SFO

9h 07m1 stop

$220Alaska Airlines

Find Deal

Tue, Oct 28 - Wed, Nov 19

Spirit Airlines flights from San Francisco Bay Area to Illinois

Our best Spirit Airlines deals on San Francisco Bay Area to Illinois flight tickets

Spirit Airlines

Sep 6

OAK6:30 amOakland

13h 02m

1 stop

ORD9:32 pmChicago O'Hare Intl

Sep 9

ORD11:15 amChicago O'Hare Intl

14h 17m

1 stop

OAK11:32 pmOakland

$103

Find similar

Spirit Airlines

Sep 6

SJC6:35 amSan Jose

12h 57m

1 stop

ORD9:32 pmChicago O'Hare Intl

Sep 9

ORD9:00 amChicago O'Hare Intl

13h 00m

1 stop

SJC8:00 pmSan Jose

$114

Find similar

Spirit Airlines

Sep 6

OAK10:56 amOakland

8h 36m

2 stops

ORD9:32 pmChicago O'Hare Intl

Sep 9

ORD9:00 amChicago O'Hare Intl

6h 34m

1 stop

OAK1:34 pmOakland

$123

Find similar

Hawaiian Airlines flights from San Francisco Bay Area to Illinois

Our best Hawaiian Airlines deals on San Francisco Bay Area to Illinois flight tickets

Hawaiian Airlines

Aug 31

SFO6:10 amSan Francisco

4h 20m

ORD12:30 pmChicago O'Hare Intl

Sep 6

ORD3:20 pmChicago O'Hare Intl

9h 03m

1 stop

SFO10:23 pmSan Francisco

$211

Find similar

Hawaiian Airlines

Nov 13

SFO6:59 pmSan Francisco

8h 02m

1 stop

ORD5:01 amChicago O'Hare Intl

Nov 17

ORD7:00 amChicago O'Hare Intl

7h 35m

1 stop

SFO12:35 pmSan Francisco

$222

Find similar

Hawaiian Airlines

Sep 3

SFO2:42 pmSan Francisco

7h 21m

1 stop

ORD12:03 amChicago O'Hare Intl

Sep 9

ORD10:00 amChicago O'Hare Intl

7h 52m

1 stop

SFO3:52 pmSan Francisco

$225

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

OaklandChicago

OAK - ORD

OAKORD

Oakland

Sat 9/6

6:30 am-9:32 pm

1 stop13h 02m

Chicago O'Hare Intl

Tue 9/9

11:15 am-11:32 pm

1 stop14h 17m

$103

San JoseChicago

SJC - ORD

SJCORD

San Jose

Sat 9/6

6:35 am-9:32 pm

1 stop12h 57m

Chicago O'Hare Intl

Tue 9/9

9:00 am-8:00 pm

1 stop13h 00m

$114

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sun 8/31

6:10 am-12:30 pm

Nonstop4h 20m

Chicago O'Hare Intl

Sat 9/6

3:19 pm-6:01 pm

Nonstop4h 42m

$187

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sun 8/31

6:28 pm-12:45 am

Nonstop4h 17m

Chicago O'Hare Intl

Sat 9/6

8:50 am-11:43 am

Nonstop4h 53m

$188

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Sun 8/31

9:25 am-3:35 pm

Nonstop4h 10m

Chicago Midway

Tue 9/16

3:50 pm-6:25 pm

Nonstop4h 35m

$188

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sat 8/30

11:08 pm-5:24 am

Nonstop4h 16m

Chicago O'Hare Intl

Sat 9/6

3:19 pm-6:01 pm

Nonstop4h 42m

$192

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Tue 9/9

10:45 am-4:55 pm

Nonstop4h 10m

Chicago Midway

Sat 9/13

8:15 am-10:50 am

Nonstop4h 35m

$197

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 8/25

4:55 pm-11:12 pm

Nonstop4h 17m

Chicago O'Hare Intl

Wed 8/27

9:13 pm-11:59 pm

Nonstop4h 46m

$207

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 10/15

10:26 am-11:59 pm

1 stop11h 33m

Chicago O'Hare Intl

Tue 10/21

8:20 am-2:01 pm

1 stop7h 41m

$216

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 10/28

7:00 am-11:59 pm

1 stop14h 59m

Chicago O'Hare Intl

Wed 11/19

2:54 pm-10:01 pm

1 stop9h 07m

$220

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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 Illinois?

The cheapest month to fly to Illinois from San Francisco Bay Area is in February. Flight prices, which tend to average around $286, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $307.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from San Francisco Bay Area to Illinois is on a Wednesday when prices can be found for as low as $408. Flights from San Francisco Bay Area to Illinois on a Sunday will generally be more expensive and average around $511. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from San Francisco Bay Area to Illinois during this time can be as low as $415. Flights at noon are often more expensive with an average ticket price of $478.

What is the cheapest San Francisco Bay Area to Illinois flight route?

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

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from San Francisco Bay Area when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $366 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from San Francisco Bay Area for as low as $290 on momondo.

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

There are 4 cabin classes available to choose from on San Francisco Bay Area to Illinois 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 San Francisco Bay Area to Illinois flights?

No. A direct flight is the cheapest option for a flight between San Francisco Bay Area to Illinois.

Cheap San Francisco Bay Area to Illinois flight deals and tips

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

Best Price Found	$51
Fastest flight time	3h 40m
Direct flights	Every day
Airports in Illinois	3 airports

The best one-way flight to Illinois from San Francisco Bay Area in the past 72 hours is $51. The best round-trip flight deal from San Francisco Bay Area to Illinois found on momondo in the last 72 hours is $103.

The fastest flight from San Francisco Bay Area to Illinois takes 3h 40m

Direct flights go from San Francisco Bay Area to Illinois every day.

There are 3 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL)

Search flight deals

When did momondo last update prices for flights from San Francisco Bay Area to Illinois?
Prices for flights from San Francisco Bay Area to Illinois are updated daily.
How many operators does momondo search for flights from San Francisco Bay Area to Illinois?
As of August 2025, there are 8 operators available to choose from for flights from San Francisco Bay Area to Illinois.
How old do you have to be to fly from San Francisco Bay Area to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San Francisco Bay Area to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from San Francisco Bay Area to Illinois?
Based on momondo bookings for flights between San Francisco Bay Area and Illinois, the leading plane model is Boeing 737-800, making up 19.98% of the total bookings. Other popular models include Airbus A321neo with 10.01%, Boeing 737-900 with 8.26%, and Boeing 737 MAX 8 with 7.77%.

Best airlines flying from San Francisco Bay Area to Illinois

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $98	Free Cancellation	Rating 5.8 3,241 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $101	Free Cancellation	Rating 6.3 8,054 reviews	Search Spirit Airlines flights
Hawaiian Airlines	PriceFrom $108	Free Cancellation	Rating 7.8 2,613 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $128	Free Cancellation	Rating 8.0 7,983 reviews	Search Delta flights
United Airlines	PriceFrom $133	Free Cancellation	Rating 7.4 8,904 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $138	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $185	Free Cancellation	Rating 8.0 4,246 reviews	Search Southwest flights
American Airlines	PriceFrom $197	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights

Why use momondo?

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

Finding the right flight to Illinois from San Francisco Bay Area is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

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

Flights from San Francisco Bay Area to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo provides multiple filters to help you find the best flight to Illinois from San Francisco Bay Area. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of San Francisco Bay Area to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Illinois 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.

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Find better results for your trip to Illinois

Popular cities in Illinois

Flights to New Yorkfrom $48

Flights to Los Angelesfrom $37

Flights to Miamifrom $58

Flights to Chicagofrom $59

Flights to Orlandofrom $54

Flights to Las Vegasfrom $35

Flights to San Franciscofrom $61

Flights to Washington, D.C.from $48

Flights to Bostonfrom $77

Flights to Atlantafrom $29

Flights to Dallasfrom $55

Flights to Seattlefrom $93

Cheap flights from San Francisco Bay Area to Illinois from $51

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco Bay Area to Illinois departing on 9/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from San Francisco Bay Area to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Spirit Airlines flights from San Francisco Bay Area to Illinois

Our best Spirit Airlines deals on San Francisco Bay Area to Illinois flight tickets

Hawaiian Airlines flights from San Francisco Bay Area to Illinois

Our best Hawaiian Airlines deals on San Francisco Bay Area to Illinois flight tickets

momondo Fare Finder

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

See travel insights to Illinois from

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

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 Illinois?

What is the cheapest day to depart on your flight to Illinois?

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

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from San Francisco Bay Area to Illinois during this time can be as low as $415. Flights at noon are often more expensive with an average ticket price of $478.

What is the cheapest San Francisco Bay Area to Illinois flight route?

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

How far in advance should I book a flight to Illinois?

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

There are 4 cabin classes available to choose from on San Francisco Bay Area to Illinois 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 San Francisco Bay Area to Illinois flights?

No. A direct flight is the cheapest option for a flight between San Francisco Bay Area to Illinois.

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

Spirit Airlines, Southwest, and United Airlines are the most popular carriers operating from San Francisco Bay Area to Illinois

What airlines fly to Illinois?

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

As of August 2025, there are 76 flights per day flying from San Francisco Bay Area to Illinois. The most common time of day flights depart is 8:00AM, with 47% of flights taking off at noon.

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

As of August 2025, 534 flights take off from San Francisco Bay Area and land in Illinois each week. The most common flight departure day for this route is Fri, with 20% of weekly flights taking off on this day.

Cheap San Francisco Bay Area to Illinois flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

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

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

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

What documentation or ID do you need to fly to Illinois?

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

Best airlines flying from San Francisco Bay Area to Illinois

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

Why use momondo?

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

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

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

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

An easier way to manage your Illinois 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 Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo