Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from San Francisco to Illinois from $63

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 1/29. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from San Francisco to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:55 pm - 11:24 amSFO-STL
12h 29m1 stop
Frontier Logo
7:02 pm - 12:11 amSTL-SFO
31h 09m2 stops
$267Frontier
Find Deal
Thu, Nov 13 - Sun, Nov 16
Frontier Logo
7:30 pm - 10:02 amSFO-STL
12h 32m2 stops
Frontier Logo
7:43 pm - 7:53 amSTL-SFO
14h 10m1 stop
$268Frontier
Find Deal
Thu, Feb 26 - Fri, Mar 6
Alaska Airlines Logo
8:09 am - 7:54 pmSFO-ORD
9h 45m1 stop
Alaska Airlines Logo
8:39 am - 6:02 pmORD-SFO
11h 23m2 stops
$288Alaska Airlines
Find Deal
Mon, Dec 15 - Thu, Dec 18
Alaska Airlines Logo
7:20 pm - 5:02 amSFO-ORD
7h 42m1 stop
Alaska Airlines Logo
9:00 am - 2:02 pmORD-SFO
7h 02m1 stop
$290Alaska Airlines
Find Deal
Tue, Dec 30 - Wed, Jan 7
American Airlines Logo
12:17 am - 10:39 amSFO-PIA
8h 22m1 stop
American Airlines Logo
5:10 pm - 10:58 pmPIA-SFO
7h 48m1 stop
$294American Airlines
Find Deal
Thu, Feb 5 - Sun, Feb 15
American Airlines Logo
7:27 am - 6:18 pmSFO-MLI
8h 51m2 stops
American Airlines Logo
3:37 pm - 11:25 pmMLI-SFO
9h 48m1 stop
$294American Airlines
Find Deal
Fri, Dec 5 - Mon, Dec 8
United Airlines Logo
10:40 pm - 5:00 amSFO-ORD
4h 20mnonstop
United Airlines Logo
4:17 pm - 7:07 pmORD-SFO
4h 50mnonstop
$297United Airlines
Find Deal
Mon, Nov 24 - Thu, Nov 27
United Airlines Logo
4:50 pm - 11:10 pmSFO-ORD
4h 20mnonstop
United Airlines Logo
4:20 pm - 7:16 pmORD-SFO
4h 56mnonstop
$299United Airlines
Find Deal
Wed, Dec 17 - Tue, Dec 23
Southwest Logo
6:10 am - 12:15 pmSFO-MDW
4h 05mnonstop
Southwest Logo
8:15 am - 11:00 amMDW-SFO
4h 45mnonstop
$299Southwest
Find Deal
Wed, Dec 3 - Sat, Dec 6
Southwest Logo
6:10 am - 12:15 pmSFO-MDW
4h 05mnonstop
Southwest Logo
1:15 pm - 8:05 pmMDW-SFO
8h 50m1 stop
$309Southwest
Find Deal
Wed, Dec 10 - Sat, Dec 13

Alaska Airlines flights from San Francisco to Illinois

Our best Alaska Airlines deals on San Francisco to Illinois flight tickets
Alaska Airlines
Dec 15
SFO8:09 amSan Francisco
9h 45m
1 stop
ORD7:54 pmChicago O'Hare Intl
Dec 18
ORD8:39 amChicago O'Hare Intl
11h 23m
2 stops
SFO6:02 pmSan Francisco
$288
Find similar
Alaska Airlines
Dec 30
SFO7:20 pmSan Francisco
7h 42m
1 stop
ORD5:02 amChicago O'Hare Intl
Jan 7
ORD9:00 amChicago O'Hare Intl
7h 02m
1 stop
SFO2:02 pmSan Francisco
$290
Find similar
Alaska Airlines
Dec 16
SFO9:57 pmSan Francisco
19h 57m
1 stop
ORD7:54 pmChicago O'Hare Intl
Dec 22
ORD3:33 pmChicago O'Hare Intl
10h 21m
1 stop
SFO11:54 pmSan Francisco
$312
Find similar

United Airlines flights from San Francisco to Illinois

Our best United Airlines deals on San Francisco to Illinois flight tickets
United Airlines
Nov 24
SFO10:40 pmSan Francisco
4h 20m
ORD5:00 amChicago O'Hare Intl
Nov 27
ORD4:17 pmChicago O'Hare Intl
4h 50m
SFO7:07 pmSan Francisco
$297
Find similar
United Airlines
Dec 17
SFO4:50 pmSan Francisco
4h 20m
ORD11:10 pmChicago O'Hare Intl
Dec 23
ORD4:20 pmChicago O'Hare Intl
4h 56m
SFO7:16 pmSan Francisco
$299
Find similar
United Airlines
Mar 7
SFO10:50 pmSan Francisco
7h 02m
1 stop
DEC7:52 amDecatur Arpt
Mar 10
DEC7:09 pmDecatur Arpt
6h 45m
1 stop
SFO11:54 pmSan Francisco
$374
Find similar

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 November 3, 2025.
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

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 11/13

8:55 pm-11:24 am

1 stop12h 29m

Lambert-St Louis

Sun 11/16

7:02 pm-12:11 am

2 stops31h 09m

$267

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 2/26

7:30 pm-10:02 am

2 stops12h 32m

Lambert-St Louis

Fri 3/6

7:43 pm-7:53 am

1 stop14h 10m

$268

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 12/15

8:09 am-7:54 pm

1 stop9h 45m

Chicago O'Hare Intl

Thu 12/18

8:39 am-6:02 pm

2 stops11h 23m

$288

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 12/30

7:20 pm-5:02 am

1 stop7h 42m

Chicago O'Hare Intl

Wed 1/7

9:00 am-2:02 pm

1 stop7h 02m

$290

San FranciscoPeoria

SFO - PIA

SFOPIA

San Francisco

Thu 2/5

12:17 am-10:39 am

1 stop8h 22m

Greater Peoria

Sun 2/15

5:10 pm-10:58 pm

1 stop7h 48m

$294

San FranciscoMoline

SFO - MLI

SFOMLI

San Francisco

Fri 12/5

7:27 am-6:18 pm

2 stops8h 51m

Moline Quad-City

Mon 12/8

3:37 pm-11:25 pm

1 stop9h 48m

$294

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 11/24

10:40 pm-5:00 am

Nonstop4h 20m

Chicago O'Hare Intl

Thu 11/27

4:17 pm-7:07 pm

Nonstop4h 50m

$297

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 12/17

4:50 pm-11:10 pm

Nonstop4h 20m

Chicago O'Hare Intl

Tue 12/23

4:20 pm-7:16 pm

Nonstop4h 56m

$299

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Wed 12/3

6:10 am-12:15 pm

Nonstop4h 05m

Chicago Midway

Sat 12/6

8:15 am-11:00 am

Nonstop4h 45m

$299

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Wed 12/10

6:10 am-12:15 pm

Nonstop4h 05m

Chicago Midway

Sat 12/13

1:15 pm-8:05 pm

1 stop8h 50m

$309

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

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 $405. Flights from San Francisco to Illinois on a Sunday will generally be more expensive and average around $506. 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 to Illinois during this time can be as low as $412. Flights at noon are often more expensive with an average ticket price of $467.

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 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 $372 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 $308 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?

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

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

$184

Fastest flight time

3h 40m

Direct flights

Every day

Airports in Illinois

2 airports
The best one-way flight to Illinois from San Francisco in the past 72 hours is $184. The best round-trip flight deal from San Francisco to Illinois found on momondo in the last 72 hours is $397.
The fastest flight from San Francisco to Illinois takes 3h 40m
Direct flights go from San Francisco to Illinois every day.
There are 2 airports near Illinois: 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 $108Free CancellationRating
7.8
2,799 reviews
Search Hawaiian Airlines flights
FrontierPriceFrom $128Free CancellationRating
5.8
3,117 reviews
Search Frontier flights
DeltaPriceFrom $128Free CancellationRating
7.9
8,001 reviews
Search Delta flights
United AirlinesPriceFrom $133Free CancellationRating
7.4
8,996 reviews
Search United Airlines flights
SouthwestPriceFrom $185Free CancellationRating
8.0
4,238 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $196Free CancellationRating
8.0
11,235 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $197Free CancellationRating
7.2
11,035 reviews
Search American Airlines 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 12/3
Wed 12/10
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo
Flights to New Yorkfrom $49
Flights to Los Angelesfrom $49
Flights to Miamifrom $49
Flights to Chicagofrom $54
Flights to Orlandofrom $47
Flights to Las Vegasfrom $49
Flights to San Franciscofrom $54
Flights to Washington, D.C.from $54
Flights to Bostonfrom $40
Flights to Atlantafrom $40
Flights to Dallasfrom $49
Flights to Seattlefrom $68