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Cheap flights from San Francisco to Illinois from $79

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 5/19. 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
8:48 pm - 6:39 am
SFO
-
ORD
7h 51m
1 stop
Multiple Airlines Logo
5:15 am - 9:04 pm
ORD
-
SFO
17h 49m
1 stop
$246Multiple Airlines
Tue, May 5 - Mon, May 18
Southwest Logo
5:25 am - 11:35 am
SFO
-
MDW
4h 10mnonstop
Southwest Logo
5:15 pm - 10:05 pm
MDW
-
SFO
6h 50m
1 stop
$247Southwest
Wed, Apr 15 - Wed, Apr 22
Frontier Logo
10:03 pm - 10:44 am
SFO
-
ORD
10h 41m
1 stop
Frontier Logo
10:55 am - 12:27 am
ORD
-
SFO
15h 32m
1 stop
$247Frontier
Mon, Apr 6 - Fri, Apr 17
Frontier Logo
6:00 am - 8:37 pm
SFO
-
ORD
12h 37m
1 stop
Frontier Logo
9:42 pm - 8:01 am
ORD
-
SFO
12h 19m
1 stop
$248Frontier
Wed, May 27 - Sun, May 31
United Airlines Logo
2:00 pm - 8:39 pm
SFO
-
ORD
4h 39mnonstop
United Airlines Logo
9:51 pm - 12:50 am
ORD
-
SFO
4h 59mnonstop
$251United Airlines
Sat, May 2 - Tue, May 5
United Airlines Logo
6:29 pm - 12:59 am
SFO
-
ORD
4h 30mnonstop
United Airlines Logo
6:25 am - 9:16 am
ORD
-
SFO
4h 51mnonstop
$254United Airlines
Tue, Apr 7 - Wed, Apr 8
Delta Logo
10:55 pm - 8:47 am
SFO
-
MDW
7h 52m
1 stop
Delta Logo
9:27 am - 2:55 pm
MDW
-
SFO
7h 28m
1 stop
$257Delta
Tue, Apr 14 - Tue, Apr 21
American Airlines Logo
1:28 pm - 11:52 pm
SFO
-
BMI
8h 24m
1 stop
American Airlines Logo
2:46 pm - 10:00 pm
BMI
-
SFO
9h 14m
1 stop
$349American Airlines
Wed, May 6 - Wed, May 13
American Airlines Logo
10:13 am - 10:27 pm
SFO
-
BMI
10h 14m
2 stops
American Airlines Logo
5:00 am - 9:52 am
BMI
-
SFO
6h 52m
1 stop
$354American Airlines
Wed, May 6 - Wed, May 13
Delta Logo
11:45 pm - 11:11 am
SFO
-
BMI
9h 26m
1 stop
Delta Logo
4:00 pm - 10:39 pm
BMI
-
SFO
8h 39m
1 stop
$369Delta
Fri, Jul 31 - Mon, Aug 10

Frontier flights from San Francisco to Illinois

Our best Frontier deals on San Francisco to Illinois flight tickets
Frontier
May 16
SFO8:48 pmSan Francisco
7h 51m
1 stop
ORD6:39 amChicago O'Hare Intl
May 18
ORD9:42 pmChicago O'Hare Intl
16h 00m
1 stop
SFO11:42 amSan Francisco
$248
Frontier
Apr 17
SFO11:16 pmSan Francisco
12h 51m
1 stop
ORD2:07 pmChicago O'Hare Intl
May 3
ORD7:21 pmChicago O'Hare Intl
28h 18m
1 stop
SFO9:39 pmSan Francisco
$249
Frontier
May 23
SFO8:56 amSan Francisco
9h 41m
1 stop
ORD8:37 pmChicago O'Hare Intl
May 24
ORD9:42 pmChicago O'Hare Intl
12h 19m
1 stop
SFO8:01 amSan Francisco
$250

American Airlines flights from San Francisco to Illinois

Our best American Airlines deals on San Francisco to Illinois flight tickets
American Airlines
May 20
SFO7:21 amSan Francisco
4h 39m
ORD2:00 pmChicago O'Hare Intl
May 27
ORD8:43 amChicago O'Hare Intl
4h 41m
SFO11:24 amSan Francisco
$261
American Airlines
Apr 16
SFO1:28 pmSan Francisco
4h 44m
ORD8:12 pmChicago O'Hare Intl
Apr 23
ORD6:55 amChicago O'Hare Intl
4h 57m
SFO9:52 amSan Francisco
$275
American Airlines
Jun 5
SFO11:14 pmSan Francisco
4h 47m
ORD6:01 amChicago O'Hare Intl
Jun 10
ORD6:45 amChicago O'Hare Intl
4h 40m
SFO9:25 amSan Francisco
$295

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 March 21, 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

Tue 5/5

8:48 pm-6:39 am

1 stop7h 51m

Chicago O'Hare Intl

Mon 5/18

5:15 am-9:04 pm

1 stop17h 49m

$246

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Wed 4/15

5:25 am-11:35 am

Nonstop4h 10m

Chicago Midway

Wed 4/22

5:15 pm-10:05 pm

1 stop6h 50m

$247

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 4/6

10:03 pm-10:44 am

1 stop10h 41m

Chicago O'Hare Intl

Fri 4/17

10:55 am-12:27 am

1 stop15h 32m

$247

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 5/27

6:00 am-8:37 pm

1 stop12h 37m

Chicago O'Hare Intl

Sun 5/31

9:42 pm-8:01 am

1 stop12h 19m

$248

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sat 5/2

2:00 pm-8:39 pm

Nonstop4h 39m

Chicago O'Hare Intl

Tue 5/5

9:51 pm-12:50 am

Nonstop4h 59m

$251
Quickest round-trip

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 4/7

6:29 pm-12:59 am

Nonstop4h 30m

Chicago O'Hare Intl

Wed 4/8

6:25 am-9:16 am

Nonstop4h 51m

$254

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Tue 4/14

10:55 pm-8:47 am

1 stop7h 52m

Chicago Midway

Tue 4/21

9:27 am-2:55 pm

1 stop7h 28m

$257

San FranciscoBloomington

SFO - BMI

SFOBMI

San Francisco

Wed 5/6

1:28 pm-11:52 pm

1 stop8h 24m

Bloomington-Normal

Wed 5/13

2:46 pm-10:00 pm

1 stop9h 14m

$349

San FranciscoBloomington

SFO - BMI

SFOBMI

San Francisco

Wed 5/6

10:13 am-10:27 pm

2 stops10h 14m

Bloomington-Normal

Wed 5/13

5:00 am-9:52 am

1 stop6h 52m

$354

San FranciscoBloomington

SFO - BMI

SFOBMI

San Francisco

Fri 7/31

11:45 pm-11:11 am

1 stop9h 26m

Bloomington-Normal

Mon 8/10

4:00 pm-10:39 pm

1 stop8h 39m

$369

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 $291, 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 April is also cheap. Prices for this month can be found on momondo for an average of $325.

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 $401. Flights from San Francisco to Illinois on a Sunday will generally be more expensive and average around $497. 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 $408. Flights at noon are often more expensive with an average ticket price of $451.

What is the cheapest San Francisco to Illinois flight route?

Fly from San Francisco to Chicago O'Hare Intl for the best San Francisco - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $381 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 $307 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 8% 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

$193

Fastest flight time

3h 45m

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 $193. The best round-trip flight deal from San Francisco to Illinois found on momondo in the last 72 hours is $337.
The fastest flight from San Francisco to Illinois takes 3h 45m
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

  • 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 $101Free CancellationRating
7.8
2,841 reviews
Search Hawaiian Airlines flights
FrontierPriceFrom $118Free CancellationRating
5.7
3,020 reviews
Search Frontier flights
DeltaPriceFrom $128Free CancellationRating
7.9
8,315 reviews
Search Delta flights
United AirlinesPriceFrom $133Free CancellationRating
7.4
9,453 reviews
Search United Airlines flights
SouthwestPriceFrom $185Free CancellationRating
8.0
4,324 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $186Free CancellationRating
7.9
12,092 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $197Free CancellationRating
7.1
11,490 reviews
Search American Airlines flights
JetBluePriceFrom $234Free CancellationRating
7.2
2,909 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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