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Cheap flights from San Francisco to Illinois from $133

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 5/29. 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
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.
Southwest Logo
5:25 am - 11:35 am
SFO
-
MDW
4h 10mnonstop
Southwest Logo
9:30 pm - 12:10 am
MDW
-
SFO
4h 40mnonstop
$282Southwest
Tue, Jun 2 - Tue, Jun 9
American Airlines Logo
6:00 am - 12:35 pm
SFO
-
ORD
4h 35mnonstop
American Airlines Logo
9:04 pm - 11:47 pm
ORD
-
SFO
4h 43mnonstop
$282American Airlines
Tue, May 26 - Tue, Jun 2
Frontier Logo
3:43 pm - 5:28 am
SFO
-
ORD
11h 45m
1 stop
Frontier Logo
7:15 am - 4:32 pm
ORD
-
SFO
11h 17m
1 stop
$283Frontier
Sun, Jul 26 - Thu, Jul 30
Frontier Logo
5:25 pm - 8:32 pm
SFO
-
ORD
25h 07m
2 stops
Frontier Logo
9:48 pm - 11:43 am
ORD
-
SFO
15h 55m
1 stop
$284Frontier
Fri, Jun 5 - Tue, Jun 9
Delta Logo
12:15 am - 8:42 am
SFO
-
MDW
6h 27m
1 stop
Delta Logo
5:10 pm - 12:46 am
MDW
-
SFO
9h 36m
1 stop
$285Delta
Wed, May 27 - Thu, May 28
American Airlines Logo
2:47 pm - 9:33 pm
SFO
-
ORD
4h 46mnonstop
American Airlines Logo
9:00 pm - 11:58 pm
ORD
-
SFO
4h 58mnonstop
$286American Airlines
Sat, Jun 6 - Tue, Jun 9
Southwest Logo
10:10 am - 9:35 pm
SFO
-
MDW
9h 25m
1 stop
Southwest Logo
12:50 pm - 9:25 pm
MDW
-
SFO
10h 35m
2 stops
$286Southwest
Thu, May 28 - Wed, Jun 3
Alaska Airlines Logo
6:00 am - 4:48 pm
SFO
-
ORD
8h 48m
1 stop
Alaska Airlines Logo
7:59 pm - 9:33 am
ORD
-
SFO
15h 34m
1 stop
$289Alaska Airlines
Wed, Jun 3 - Mon, Jun 8
United Airlines Logo
12:12 pm - 6:17 pm
SFO
-
STL
4h 05mnonstop
United Airlines Logo
7:23 pm - 9:43 pm
STL
-
SFO
4h 20mnonstop
$347United Airlines
Wed, May 27 - Sat, May 30
United Airlines Logo
5:05 am - 3:46 pm
SFO
-
STL
8h 41m
1 stop
United Airlines Logo
7:23 pm - 9:43 pm
STL
-
SFO
4h 20mnonstop
$353United Airlines
Wed, May 27 - Sat, May 30

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Alaska Airlines flights from San Francisco to Illinois

Our best Alaska Airlines deals on San Francisco to Illinois flight tickets
Alaska Airlines
Jun 3
SFO6:00 amSan Francisco
8h 48m
1 stop
ORD4:48 pmChicago O'Hare Intl
Jun 8
ORD7:59 pmChicago O'Hare Intl
15h 34m
1 stop
SFO9:33 amSan Francisco
$289
Alaska Airlines
Jun 3
SFO7:20 amSan Francisco
9h 30m
1 stop
ORD6:50 pmChicago O'Hare Intl
Jun 8
ORD7:59 pmChicago O'Hare Intl
15h 34m
1 stop
SFO9:33 amSan Francisco
$314
Alaska Airlines
Sep 28
SFO9:27 amSan Francisco
7h 36m
1 stop
ORD7:03 pmChicago O'Hare Intl
Oct 3
ORD2:21 pmChicago O'Hare Intl
10h 20m
1 stop
SFO10:41 pmSan Francisco
$315

American Airlines flights from San Francisco to Illinois

Our best American Airlines deals on San Francisco to Illinois flight tickets
American Airlines
Jun 6
SFO2:47 pmSan Francisco
4h 46m
ORD9:33 pmChicago O'Hare Intl
Jun 9
ORD9:00 pmChicago O'Hare Intl
4h 58m
SFO11:58 pmSan Francisco
$286
American Airlines
May 26
SFO6:00 amSan Francisco
4h 35m
ORD12:35 pmChicago O'Hare Intl
Jun 2
ORD9:04 pmChicago O'Hare Intl
4h 43m
SFO11:47 pmSan Francisco
$287
American Airlines
May 26
SFO6:00 amSan Francisco
4h 35m
ORD12:35 pmChicago O'Hare Intl
Jun 2
ORD6:45 amChicago O'Hare Intl
4h 40m
SFO9:25 amSan Francisco
$288

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 May 6, 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 - MDW

SFOMDW

San Francisco

Tue 6/2

5:25 am-11:35 am

Nonstop4h 10m

Chicago Midway

Tue 6/9

9:30 pm-12:10 am

Nonstop4h 40m

$282

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 5/26

6:00 am-12:35 pm

Nonstop4h 35m

Chicago O'Hare Intl

Tue 6/2

9:04 pm-11:47 pm

Nonstop4h 43m

$282

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sun 7/26

3:43 pm-5:28 am

1 stop11h 45m

Chicago O'Hare Intl

Thu 7/30

7:15 am-4:32 pm

1 stop11h 17m

$283

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 6/5

5:25 pm-8:32 pm

2 stops25h 07m

Chicago O'Hare Intl

Tue 6/9

9:48 pm-11:43 am

1 stop15h 55m

$284

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Wed 5/27

12:15 am-8:42 am

1 stop6h 27m

Chicago Midway

Thu 5/28

5:10 pm-12:46 am

1 stop9h 36m

$285

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sat 6/6

2:47 pm-9:33 pm

Nonstop4h 46m

Chicago O'Hare Intl

Tue 6/9

9:00 pm-11:58 pm

Nonstop4h 58m

$286

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Thu 5/28

10:10 am-9:35 pm

1 stop9h 25m

Chicago Midway

Wed 6/3

12:50 pm-9:25 pm

2 stops10h 35m

$286

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 6/3

6:00 am-4:48 pm

1 stop8h 48m

Chicago O'Hare Intl

Mon 6/8

7:59 pm-9:33 am

1 stop15h 34m

$289
Quickest round-trip

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 5/27

12:12 pm-6:17 pm

Nonstop4h 05m

Lambert-St Louis

Sat 5/30

7:23 pm-9:43 pm

Nonstop4h 20m

$347

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 5/27

5:05 am-3:46 pm

1 stop8h 41m

Lambert-St Louis

Sat 5/30

7:23 pm-9:43 pm

Nonstop4h 20m

$353

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 $288, 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 to Illinois is on a Wednesday when prices can be found for as low as $422. Flights from San Francisco to Illinois on a Sunday will generally be more expensive and average around $534. 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 $430. Flights at noon are often more expensive with an average ticket price of $469.

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 $393 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 $326 on momondo.

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

$197

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 $197. The best round-trip flight deal from San Francisco to Illinois found on momondo in the last 72 hours is $394.
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 $101Free CancellationRating
7.8
2,837 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $122Free CancellationRating
7.9
8,456 reviews
Search Delta flights
FrontierPriceFrom $130Free CancellationRating
5.6
2,964 reviews
Search Frontier flights
United AirlinesPriceFrom $133Free CancellationRating
7.4
9,684 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $179Free CancellationRating
7.9
12,332 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $185Free CancellationRating
7.9
4,305 reviews
Search Southwest flights
American AirlinesPriceFrom $200Free CancellationRating
7.1
11,667 reviews
Search American Airlines flights
JetBluePriceFrom $224Free CancellationRating
7.1
2,978 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

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