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Cheap flights from Illinois to San Francisco from $106

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to San Francisco departing on 6/16. 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 Illinois to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:00 am - 7:13 pm
MDW
-
SFO
15h 13m
1 stop
Frontier Logo
12:24 am - 2:27 pm
SFO
-
MDW
12h 03m
1 stop
$270Frontier
Sat, Jul 18 - Sun, Jul 19
Frontier Logo
6:55 am - 7:34 pm
ORD
-
SFO
14h 39m
1 stop
Frontier Logo
10:50 pm - 5:07 am
SFO
-
ORD
28h 17m
1 stop
$273Frontier
Fri, May 29 - Mon, Jun 8
Multiple Airlines Logo
7:00 am - 1:17 pm
ORD
-
SFO
8h 17m
1 stop
Multiple Airlines Logo
10:02 am - 7:00 pm
SFO
-
ORD
6h 58m
1 stop
$274Multiple Airlines
Fri, Oct 30 - Tue, Nov 10
Delta Logo
1:05 pm - 7:24 pm
MDW
-
SFO
8h 19m
1 stop
Delta Logo
6:00 am - 3:27 pm
SFO
-
MDW
7h 27m
1 stop
$277Delta
Wed, Sep 2 - Tue, Sep 8
Delta Logo
6:30 am - 11:35 am
ORD
-
SFO
7h 05m
1 stop
Delta Logo
9:55 am - 6:57 pm
SFO
-
ORD
7h 02m
1 stop
$277Delta
Wed, Jul 1 - Wed, Jul 22
Southwest Logo
8:50 am - 4:25 pm
MDW
-
SFO
9h 35m
2 stops
Southwest Logo
9:35 am - 7:50 pm
SFO
-
MDW
8h 15m
1 stop
$282Southwest
Tue, Aug 18 - Tue, Aug 25
Southwest Logo
10:35 am - 1:10 pm
MDW
-
SFO
4h 35mnonstop
Southwest Logo
11:40 pm - 5:50 am
SFO
-
MDW
4h 10mnonstop
$287Southwest
Sat, Oct 10 - Mon, Oct 12
United Airlines Logo
5:20 pm - 10:45 pm
PIA
-
SFO
7h 25m
1 stop
United Airlines Logo
12:50 am - 10:21 am
SFO
-
PIA
7h 31m
1 stop
$334United Airlines
Sat, Nov 7 - Sat, Nov 7
United Airlines Logo
10:40 am - 3:28 pm
MLI
-
SFO
6h 48m
1 stop
United Airlines Logo
2:06 pm - 11:16 pm
SFO
-
MLI
7h 10m
1 stop
$340United Airlines
Wed, May 27 - Wed, Jun 3
Multiple Airlines Logo
12:55 pm - 10:28 am
PIA
-
SFO
23h 33m
1 stop
Multiple Airlines Logo
7:11 pm - 7:56 pm
SFO
-
PIA
22h 45m
1 stop
$351Multiple Airlines
Mon, Jun 8 - Fri, Jul 24

Southwest flights from Illinois to San Francisco

Our best Southwest deals on Illinois to San Francisco flight tickets
Southwest
Jun 1
MDW9:45 pmChicago Midway
4h 35m
SFO12:20 amSan Francisco
Jun 9
SFO3:35 pmSan Francisco
6h 30m
1 stop
MDW12:05 amChicago Midway
$282
Southwest
Jun 4
MDW9:30 pmChicago Midway
4h 40m
SFO12:10 amSan Francisco
Jun 8
SFO11:40 pmSan Francisco
4h 15m
MDW5:55 amChicago Midway
$287
Southwest
Jun 4
MDW5:45 amChicago Midway
7h 30m
1 stop
SFO11:15 amSan Francisco
Jun 9
SFO3:35 pmSan Francisco
6h 30m
1 stop
MDW12:05 amChicago Midway
$292

Frontier flights from Illinois to San Francisco

Our best Frontier deals on Illinois to San Francisco flight tickets
Frontier
Jul 18
MDW6:00 amChicago Midway
15h 13m
1 stop
SFO7:13 pmSan Francisco
Jul 19
SFO12:24 amSan Francisco
12h 03m
1 stop
MDW2:27 pmChicago Midway
$270
Frontier
May 29
ORD6:55 amChicago O'Hare Intl
14h 39m
1 stop
SFO7:34 pmSan Francisco
Jun 8
SFO10:50 pmSan Francisco
28h 17m
1 stop
ORD5:07 amChicago O'Hare Intl
$273
Frontier
Jun 26
ORD9:48 pmChicago O'Hare Intl
15h 55m
1 stop
SFO11:43 amSan Francisco
Jul 14
SFO11:10 amSan Francisco
16h 18m
2 stops
ORD5:28 amChicago O'Hare Intl
$275

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to San Francisco 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 16, 2026.
Use the filters below to find and compare flights from Illinois to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSan Francisco

MDW - SFO

MDWSFO

Chicago Midway

Sat 7/18

6:00 am-7:13 pm

1 stop15h 13m

San Francisco

Sun 7/19

12:24 am-2:27 pm

1 stop12h 03m

$270

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Fri 5/29

6:55 am-7:34 pm

1 stop14h 39m

San Francisco

Mon 6/8

10:50 pm-5:07 am

1 stop28h 17m

$273

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Fri 10/30

7:00 am-1:17 pm

1 stop8h 17m

San Francisco

Tue 11/10

10:02 am-7:00 pm

1 stop6h 58m

$274

ChicagoSan Francisco

MDW - SFO

MDWSFO

Chicago Midway

Wed 9/2

1:05 pm-7:24 pm

1 stop8h 19m

San Francisco

Tue 9/8

6:00 am-3:27 pm

1 stop7h 27m

$277

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Wed 7/1

6:30 am-11:35 am

1 stop7h 05m

San Francisco

Wed 7/22

9:55 am-6:57 pm

1 stop7h 02m

$277

ChicagoSan Francisco

MDW - SFO

MDWSFO

Chicago Midway

Tue 8/18

8:50 am-4:25 pm

2 stops9h 35m

San Francisco

Tue 8/25

9:35 am-7:50 pm

1 stop8h 15m

$282
Quickest round-trip

ChicagoSan Francisco

MDW - SFO

MDWSFO

Chicago Midway

Sat 10/10

10:35 am-1:10 pm

Nonstop4h 35m

San Francisco

Mon 10/12

11:40 pm-5:50 am

Nonstop4h 10m

$287

PeoriaSan Francisco

PIA - SFO

PIASFO

Greater Peoria

Sat 11/7

5:20 pm-10:45 pm

1 stop7h 25m

San Francisco

Sat 11/7

12:50 am-10:21 am

1 stop7h 31m

$334

MolineSan Francisco

MLI - SFO

MLISFO

Moline Quad-City

Wed 5/27

10:40 am-3:28 pm

1 stop6h 48m

San Francisco

Wed 6/3

2:06 pm-11:16 pm

1 stop7h 10m

$340

PeoriaSan Francisco

PIA - SFO

PIASFO

Greater Peoria

Mon 6/8

12:55 pm-10:28 am

1 stop23h 33m

San Francisco

Fri 7/24

7:11 pm-7:56 pm

1 stop22h 45m

$351

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 San Francisco from

How to get the cheapest flight ticket from Illinois to San Francisco

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 San Francisco?

If you aren’t able to travel to San Francisco during the month of August, then flying in June is also cheap. Prices for this month can be found on momondo for an average of $337.

What is the cheapest day to depart on your flight to San Francisco?

The cheapest day to depart from Illinois to San Francisco is on a Thursday when prices can be found for as low as $385. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $630.

What is the cheapest time of day to depart on your flight to San Francisco?

Our data shows that the cheapest Illinois to San Francisco flights are usually those with departure times in the morning. Our users have found flights to San Francisco in the morning for as low as $432. Flights in the afternoon are often more expensive with an average ticket price of $574.

What is the cheapest Illinois to San Francisco flight route?

Fly from Chicago O'Hare Intl to San Francisco for the best Illinois - San Francisco flight prices

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

You are more likely to see cheaper flights to San Francisco from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $375 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Illinois for as low as $304 on momondo.

Can stopping save me money on Illinois to San Francisco flights?

You could potentially save up to 3% on your flight if you consider stops on a Illinois to San Francisco flight.

Cheap Illinois to San Francisco flight deals and tips

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

Best Price Found

$184

Fastest flight time

4h 05m

Direct flights

Every day

Airports in San Francisco

1 airport
The best one-way flight to San Francisco from Illinois in the past 72 hours is $184. The best round-trip flight deal from Illinois to San Francisco found on momondo in the last 72 hours is $350.
The fastest flight from Illinois to San Francisco takes 4h 05m
Direct flights go from Illinois to San Francisco every day.
There is 1 airport in San Francisco. From Illinois there are direct flights to San Francisco (SFO).
Search flight deals

Frequently asked questions about flying from Illinois to San Francisco

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

    Prices for flights from Illinois to San Francisco Airport refresh daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to San Francisco Airport.

  • What documentation or ID do you need to fly to San Francisco Airport?

    The required travel and health documents for your San Francisco Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Francisco Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Illinois to San Francisco?

Best airlines flying from Illinois to San Francisco

Compare and see reviews for airlines that fly from Illinois to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
Hawaiian AirlinesPriceFrom $108Free CancellationRating
7.8
2,837 reviews
Search Hawaiian Airlines flights
FrontierPriceFrom $116Free CancellationRating
5.6
2,949 reviews
Search Frontier flights
DeltaPriceFrom $128Free CancellationRating
7.9
8,454 reviews
Search Delta flights
SouthwestPriceFrom $138Free CancellationRating
8.0
4,294 reviews
Search Southwest flights
JetBluePriceFrom $147Free CancellationRating
7.1
2,977 reviews
Search JetBlue flights
Alaska AirlinesPriceFrom $186Free CancellationRating
7.9
12,372 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $198Free CancellationRating
7.1
11,662 reviews
Search American Airlines flights
United AirlinesPriceFrom $222Free CancellationRating
7.4
9,729 reviews
Search United Airlines flights

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Carmel-by-the-Sea
Modesto
Sonoma
Walnut Creek
Bodega Bay
Hayward
Roseville
Santa Clara
Berkeley
Fremont
Vallejo
Big Sur
Sunnyvale
Calistoga
South San Francisco
Salinas
Daly City
Milpitas
Pacific Grove

Why use momondo?

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

It is quick and easy to find Illinois to San Francisco flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Francisco that suits you.

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

Yes. momondo allows you to filter the results for Illinois to San Francisco flights to just show those with flexible booking policies.

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

Once you have performed a search for Illinois to San Francisco flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to San Francisco from Illinois. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your San Francisco 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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