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Cheap flights from San Francisco to Illinois from $147

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 to Illinois departing on 8/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from San Francisco to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:23 pm - 6:17 am
SFO
-
ORD
7h 54m
1 stop
Multiple Airlines Logo
2:18 pm - 9:42 pm
ORD
-
SFO
9h 24m
1 stop
$312Multiple Airlines
Sun, Aug 16 - Wed, Aug 19
Multiple Airlines Logo
8:23 pm - 6:17 am
SFO
-
ORD
7h 54m
1 stop
Multiple Airlines Logo
5:59 pm - 11:08 pm
ORD
-
SFO
7h 09m
1 stop
$313Multiple Airlines
Wed, Jul 15 - Sat, Jul 18
Frontier Logo
11:05 pm - 9:51 am
SFO
-
MDW
8h 46m
1 stop
Frontier Logo
6:05 am - 7:13 pm
MDW
-
SFO
15h 08m
1 stop
$314Frontier
Sat, Aug 8 - Tue, Aug 11
Frontier Logo
8:30 pm - 6:19 am
SFO
-
ORD
7h 49m
1 stop
Frontier Logo
11:06 am - 4:57 pm
ORD
-
SFO
7h 51m
1 stop
$314Frontier
Tue, Sep 8 - Mon, Sep 14
Alaska Airlines Logo
6:46 pm - 5:00 am
SFO
-
ORD
8h 14m
1 stop
Alaska Airlines Logo
5:59 pm - 11:08 pm
ORD
-
SFO
7h 09m
1 stop
$315Alaska Airlines
Mon, Jul 6 - Sat, Jul 18
Frontier Logo
11:00 pm - 11:07 am
SFO
-
MDW
10h 07m
1 stop
Frontier Logo
12:11 pm - 7:18 pm
MDW
-
SFO
9h 07m
1 stop
$316Frontier
Fri, Jul 10 - Tue, Jul 14
American Airlines Logo
5:30 am - 4:02 pm
SFO
-
MLI
8h 32m
1 stop
American Airlines Logo
6:45 pm - 11:45 pm
MLI
-
SFO
7h 00m
1 stop
$349American Airlines
Thu, Aug 13 - Mon, Aug 17
American Airlines Logo
11:07 pm - 9:17 am
SFO
-
PIA
8h 10m
1 stop
American Airlines Logo
4:43 pm - 12:43 am
PIA
-
SFO
10h 00m
1 stop
$383American Airlines
Wed, Jul 22 - Wed, Jul 29
United Airlines Logo
11:30 pm - 10:06 am
SFO
-
PIA
8h 36m
1 stop
United Airlines Logo
6:15 am - 1:14 pm
PIA
-
SFO
8h 59m
1 stop
$431United Airlines
Tue, Oct 20 - Sat, Oct 24
United Airlines Logo
11:50 pm - 8:54 am
SFO
-
CMI
7h 04m
1 stop
United Airlines Logo
1:32 pm - 9:20 pm
CMI
-
SFO
9h 48m
1 stop
$438United Airlines
Tue, Oct 27 - Sat, Oct 31

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American Airlines flights from San Francisco to Illinois

Our best American Airlines deals on San Francisco to Illinois flight tickets
American Airlines
Jul 9
SFO11:07 pmSan Francisco
4h 13m
ORD5:20 amChicago O'Hare Intl
Jul 15
ORD8:45 amChicago O'Hare Intl
4h 42m
SFO11:27 amSan Francisco
$337
American Airlines
Jul 16
SFO3:52 pmSan Francisco
6h 59m
1 stop
ORD12:51 amChicago O'Hare Intl
Jul 23
ORD9:17 pmChicago O'Hare Intl
4h 42m
SFO11:59 pmSan Francisco
$345
American Airlines
Aug 13
SFO5:30 amSan Francisco
8h 32m
1 stop
MLI4:02 pmMoline Quad-City
Aug 17
MLI6:45 pmMoline Quad-City
7h 00m
1 stop
SFO11:45 pmSan Francisco
$349

Alaska Airlines flights from San Francisco to Illinois

Our best Alaska Airlines deals on San Francisco to Illinois flight tickets
Alaska Airlines
Aug 6
SFO7:55 amSan Francisco
9h 02m
1 stop
ORD6:57 pmChicago O'Hare Intl
Aug 19
ORD2:18 pmChicago O'Hare Intl
9h 24m
1 stop
SFO9:42 pmSan Francisco
$315
Alaska Airlines
Jul 24
SFO7:55 amSan Francisco
9h 02m
1 stop
ORD6:57 pmChicago O'Hare Intl
Jul 29
ORD7:20 amChicago O'Hare Intl
7h 19m
1 stop
SFO12:39 pmSan Francisco
$324
Alaska Airlines
Sep 24
SFO8:25 amSan Francisco
8h 56m
1 stop
ORD7:21 pmChicago O'Hare Intl
Sep 27
ORD2:18 pmChicago O'Hare Intl
9h 24m
1 stop
SFO9:42 pmSan Francisco
$351

momondo Fare Finder

 
Customize your flight search to find flights from San Francisco to Illinois 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, momondo users made 832,500 searches. Data last updated June 17, 2026.
Use the filters below to find and compare flights from San Francisco 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

Sun 8/16

8:23 pm-6:17 am

1 stop7h 54m

Chicago O'Hare Intl

Wed 8/19

2:18 pm-9:42 pm

1 stop9h 24m

$312
Quickest round-trip

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 7/15

8:23 pm-6:17 am

1 stop7h 54m

Chicago O'Hare Intl

Sat 7/18

5:59 pm-11:08 pm

1 stop7h 09m

$313

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Sat 8/8

11:05 pm-9:51 am

1 stop8h 46m

Chicago Midway

Tue 8/11

6:05 am-7:13 pm

1 stop15h 08m

$314

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 9/8

8:30 pm-6:19 am

1 stop7h 49m

Chicago O'Hare Intl

Mon 9/14

11:06 am-4:57 pm

1 stop7h 51m

$314

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 7/6

6:46 pm-5:00 am

1 stop8h 14m

Chicago O'Hare Intl

Sat 7/18

5:59 pm-11:08 pm

1 stop7h 09m

$315

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Fri 7/10

11:00 pm-11:07 am

1 stop10h 07m

Chicago Midway

Tue 7/14

12:11 pm-7:18 pm

1 stop9h 07m

$316

San FranciscoMoline

SFO - MLI

SFOMLI

San Francisco

Thu 8/13

5:30 am-4:02 pm

1 stop8h 32m

Moline Quad-City

Mon 8/17

6:45 pm-11:45 pm

1 stop7h 00m

$349

San FranciscoPeoria

SFO - PIA

SFOPIA

San Francisco

Wed 7/22

11:07 pm-9:17 am

1 stop8h 10m

Greater Peoria

Wed 7/29

4:43 pm-12:43 am

1 stop10h 00m

$383

San FranciscoPeoria

SFO - PIA

SFOPIA

San Francisco

Tue 10/20

11:30 pm-10:06 am

1 stop8h 36m

Greater Peoria

Sat 10/24

6:15 am-1:14 pm

1 stop8h 59m

$431

San FranciscoChampaign

SFO - CMI

SFOCMI

San Francisco

Tue 10/27

11:50 pm-8:54 am

1 stop7h 04m

Champaign University-Willard

Sat 10/31

1:32 pm-9:20 pm

1 stop9h 48m

$438

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from San Francisco 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?

The cheapest month to fly to Illinois from San Francisco is in September. Flight prices, which tend to average around $290, 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 $318.

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

The cheapest day to depart from San Francisco to Illinois is on a Wednesday when prices can be found for as low as $439. Flights from San Francisco to Illinois on a Sunday will generally be more expensive and average around $552. 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 to Illinois during this time can be as low as $451. Flights at noon are often more expensive with an average ticket price of $492.

What is the cheapest San Francisco to Illinois flight route?

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

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

You are more likely to see cheaper flights to Illinois from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $410 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 for as low as $353 on momondo.

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

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

You could potentially save up to 2% on your flight if you consider stops on a San Francisco to Illinois flight.

Cheap San Francisco to Illinois flight deals and tips

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

Best Price Found

$223

Fastest flight time

3h 50m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from San Francisco in the past 72 hours is $223. The best round-trip flight deal from San Francisco to Illinois found on momondo in the last 72 hours is $413.
The fastest flight from San Francisco to Illinois takes 3h 50m
Direct flights go from San Francisco to Illinois every day.
There are 98 airports in Illinois. From San Francisco there are direct flights to Chicago Midway (MDW), Lambert-St Louis (STL).
Search flight deals

Frequently asked questions about flying from San Francisco to Illinois

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

    Prices for flights from San Francisco Airport to Illinois were last updated today.

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

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

Best airlines flying from San Francisco to Illinois

Compare and see reviews for airlines that fly from San Francisco to Illinois with momondo
Airline
Rating
Free Cancellation
Price
Hawaiian AirlinesPriceFrom $108Free CancellationRating
7.8
2,829 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $122Free CancellationRating
7.8
8,407 reviews
Search Delta flights
FrontierPriceFrom $130Free CancellationRating
5.6
2,881 reviews
Search Frontier flights
Alaska AirlinesPriceFrom $179Free CancellationRating
7.9
12,528 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $185Free CancellationRating
7.9
4,235 reviews
Search Southwest flights
United AirlinesPriceFrom $207Free CancellationRating
7.4
9,844 reviews
Search United Airlines flights
American AirlinesPriceFrom $208Free CancellationRating
7.1
11,667 reviews
Search American Airlines flights
JetBluePriceFrom $225Free CancellationRating
7.1
2,984 reviews
Search JetBlue flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from San Francisco to Illinois for you.

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

Yes. momondo enables you to select and highlight flights to Illinois from San Francisco with this policy.

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

momondo helps you find the best flight between San Francisco and Illinois by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Illinois, momondo offers a useful price alert feature which will track prices for flights to Illinois from San Francisco and alert you when they 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.
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