What airlines fly to Illinois?

United Airlines, American Airlines and Southwest 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 47% 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?

Southwest, Alaska Airlines, and Delta 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 day?

As of June 2026, there are 84 flights per day flying from San Francisco Bay Area to Illinois. The most common time of day flights depart is 8:00AM, with 49% of flights taking off at noon.

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

As of June 2026, 593 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 18% of weekly flights taking off on this day.

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 June 2026, 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.

$127 Cheap Flights from San Francisco Bay Area to Illinois in 2026

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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

Enter your travel dates to find the best prices.

8:45 pm - 5:07 am

SFO

ORD

6h 22m

1 stop

7:20 am - 2:16 pm

ORD

SFO

8h 56m

1 stop

$308Frontier

Mon, Jun 22 - Sat, Jun 27

12:32 am - 3:15 pm

SFO

MDW

12h 43m

1 stop

4:10 pm - 11:02 pm

MDW

SFO

8h 52m

1 stop

$309Frontier

Sat, Jun 27 - Sat, Jul 4

12:35 am - 6:56 am

SFO

ORD

4h 21mnonstop

9:40 pm - 12:30 am

ORD

SFO

4h 50mnonstop

$311United Airlines

Thu, Sep 10 - Mon, Sep 28

11:40 pm - 5:50 am

SFO

MDW

4h 10mnonstop

6:00 pm - 8:35 pm

MDW

SFO

4h 35mnonstop

$311Southwest

Fri, Aug 7 - Sat, Aug 15

12:10 pm - 9:30 pm

SFO

ORD

7h 20m

1 stop

9:06 pm - 11:56 pm

ORD

SFO

4h 50mnonstop

$312American Airlines

Sat, Sep 26 - Sat, Oct 3

11:40 pm - 5:55 am

SFO

MDW

4h 15mnonstop

9:30 pm - 12:15 am

MDW

SFO

4h 45mnonstop

$312Southwest

Tue, Jul 7 - Tue, Jul 21

8:11 pm - 5:00 am

SFO

ORD

6h 49m

1 stop

6:29 am - 9:05 am

ORD

SFO

4h 36mnonstop

$313American Airlines

Fri, Jul 17 - Tue, Jul 21

2:19 pm - 5:00 am

SJC

ORD

12h 41m

1 stop

7:59 pm - 9:26 am

ORD

SJC

15h 27m

1 stop

$313Alaska Airlines

Wed, Jul 22 - Tue, Jul 28

9:09 am - 6:57 pm

SJC

ORD

7h 48m

1 stop

6:20 am - 11:24 am

ORD

SJC

7h 04m

1 stop

$314Alaska Airlines

Thu, Jul 23 - Tue, Aug 4

2:10 pm - 8:35 pm

SJC

ORD

4h 25mnonstop

5:55 am - 1:08 pm

ORD

SJC

9h 13m

1 stop

$324United Airlines

Mon, Aug 17 - Thu, Aug 20

Alaska Airlines flights from San Francisco Bay Area to Illinois

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

Alaska Airlines

Sep 14

SJC8:29 amSan Jose

8h 52m

1 stop

ORD7:21 pmChicago O'Hare Intl

Sep 19

ORD2:22 pmChicago O'Hare Intl

10h 05m

1 stop

SJC10:27 pmSan Jose

$309

Alaska Airlines

Jun 30

SJC3:15 pmSan Jose

6h 21m

1 stop

ORD11:36 pmChicago O'Hare Intl

Jul 7

ORD6:20 amChicago O'Hare Intl

7h 04m

1 stop

SJC11:24 amSan Jose

$313

Alaska Airlines

Jul 23

SJC9:09 amSan Jose

7h 48m

1 stop

ORD6:57 pmChicago O'Hare Intl

Aug 4

ORD6:20 amChicago O'Hare Intl

7h 04m

1 stop

SJC11:24 amSan Jose

$314

Frontier flights from San Francisco Bay Area to Illinois

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

Frontier

Jun 22

SFO8:45 pmSan Francisco

6h 22m

1 stop

ORD5:07 amChicago O'Hare Intl

Jun 27

ORD7:20 amChicago O'Hare Intl

8h 56m

1 stop

SFO2:16 pmSan Francisco

$308

Frontier

Jun 23

SFO12:38 pmSan Francisco

6h 05m

1 stop

ORD8:43 pmChicago O'Hare Intl

Jul 15

ORD7:15 amChicago O'Hare Intl

16h 23m

2 stops

SFO9:38 pmSan Francisco

$309

Frontier

Jun 20

SFO6:00 amSan Francisco

12h 43m

1 stop

ORD8:43 pmChicago O'Hare Intl

Jun 26

ORD9:48 pmChicago O'Hare Intl

28h 39m

1 stop

SFO12:27 amSan Francisco

$310

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

Cheapest round-trip

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 6/22

8:45 pm-5:07 am

1 stop6h 22m

Chicago O'Hare Intl

Sat 6/27

7:20 am-2:16 pm

1 stop8h 56m

$308

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Sat 6/27

12:32 am-3:15 pm

1 stop12h 43m

Chicago Midway

Sat 7/4

4:10 pm-11:02 pm

1 stop8h 52m

$309

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Thu 9/10

12:35 am-6:56 am

Nonstop4h 21m

Chicago O'Hare Intl

Mon 9/28

9:40 pm-12:30 am

Nonstop4h 50m

$311

Quickest round-trip

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Fri 8/7

11:40 pm-5:50 am

Nonstop4h 10m

Chicago Midway

Sat 8/15

6:00 pm-8:35 pm

Nonstop4h 35m

$311

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sat 9/26

12:10 pm-9:30 pm

1 stop7h 20m

Chicago O'Hare Intl

Sat 10/3

9:06 pm-11:56 pm

Nonstop4h 50m

$312

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Tue 7/7

11:40 pm-5:55 am

Nonstop4h 15m

Chicago Midway

Tue 7/21

9:30 pm-12:15 am

Nonstop4h 45m

$312

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 7/17

8:11 pm-5:00 am

1 stop6h 49m

Chicago O'Hare Intl

Tue 7/21

6:29 am-9:05 am

Nonstop4h 36m

$313

San JoseChicago

SJC - ORD

SJCORD

San Jose

Wed 7/22

2:19 pm-5:00 am

1 stop12h 41m

Chicago O'Hare Intl

Tue 7/28

7:59 pm-9:26 am

1 stop15h 27m

$313

San JoseChicago

SJC - ORD

SJCORD

San Jose

Thu 7/23

9:09 am-6:57 pm

1 stop7h 48m

Chicago O'Hare Intl

Tue 8/4

6:20 am-11:24 am

1 stop7h 04m

$314

San JoseChicago

SJC - ORD

SJCORD

San Jose

Mon 8/17

2:10 pm-8:35 pm

Nonstop4h 25m

Chicago O'Hare Intl

Thu 8/20

5:55 am-1:08 pm

1 stop9h 13m

$324

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 September. Flight prices, which tend to average around $280, 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 September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $301.

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 $436. Flights from San Francisco Bay Area to Illinois on a Sunday will generally be more expensive and average around $547. 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 evening. Flights from San Francisco Bay Area to Illinois during this time can be as low as $447. Flights at noon are often more expensive with an average ticket price of $487.

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

Fly from San Francisco to Chicago Midway for the best San Francisco Bay Area - Illinois flight prices

How far in advance should I book a flight from San Francisco Bay Area 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 $401 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 $330 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

Fastest flight time	3h 50m
Direct flights	Every day
Airports in Illinois	98 airports

The fastest flight from San Francisco Bay Area to Illinois takes 3h 50m

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

There are 98 airports in Illinois. From San Francisco Bay Area there are direct flights to Chicago Midway (MDW), Lambert-St Louis (STL).

Search flight deals

Frequently asked questions about flying from San Francisco Bay Area to Illinois

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 June 2026, 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 19.66% of the total bookings. Other popular models include Airbus A321neo with 12.89%, Boeing 737-900 with 9.80%, and Boeing 737 MAX 8 with 8.82%.

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
Hawaiian Airlines	PriceFrom $108	Free Cancellation	Rating 7.8 2,831 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $122	Free Cancellation	Rating 7.8 8,397 reviews	Search Delta flights
Frontier	PriceFrom $130	Free Cancellation	Rating 5.6 2,913 reviews	Search Frontier flights
Alaska Airlines	PriceFrom $179	Free Cancellation	Rating 7.9 12,468 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $185	Free Cancellation	Rating 8.0 4,254 reviews	Search Southwest flights
American Airlines	PriceFrom $200	Free Cancellation	Rating 7.1 11,648 reviews	Search American Airlines flights
United Airlines	PriceFrom $207	Free Cancellation	Rating 7.4 9,778 reviews	Search United Airlines flights
JetBlue	PriceFrom $224	Free Cancellation	Rating 7.1 2,982 reviews	Search JetBlue 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.