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Cheap flights from San Francisco to Chicago O'Hare Intl Airport from £125

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/8. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ORD
5 Aug — 12 Aug1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from San Francisco to Chicago O'Hare Intl are usually found in September or January, booked 67 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from San Francisco to O'Hare Intl

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco to O'Hare Intl
Explore the most affordable flight options available from San Francisco to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 July 2026.

Sat 3/1007:05
SFO
-
ORD
1 stop9h 48m
Alaska Airlines
Tue 6/1014:21
ORD
-
SFO
1 stop9h 15m
Alaska Airlines
Deal found 6/7£236
Fri 24/718:34
SFO
-
ORD
Nonstop4h 25m
United Airlines
Sat 25/707:30
ORD
-
SFO
Nonstop4h 49m
United Airlines
Deal found 2/7£240
Sat 15/818:38
SFO
-
ORD
Nonstop4h 21m
United Airlines
Sun 23/806:00
ORD
-
SFO
Nonstop4h 38m
United Airlines
Deal found 1/7£241
Wed 12/800:35
SFO
-
ORD
Nonstop4h 21m
United Airlines
Thu 20/806:00
ORD
-
SFO
Nonstop4h 38m
United Airlines
Deal found 3/7£242
Fri 23/1008:20
SFO
-
ORD
1 stop8h 33m
Alaska Airlines
Tue 27/1007:20
ORD
-
SFO
1 stop8h 13m
Alaska Airlines
Deal found 3/7£243
Fri 31/700:50
SFO
-
ORD
Nonstop4h 26m
United Airlines
Sat 8/808:50
ORD
-
SFO
Nonstop4h 48m
United Airlines
Deal found 2/7£243
Fri 31/718:34
SFO
-
ORD
Nonstop4h 25m
United Airlines
Tue 11/821:40
ORD
-
SFO
Nonstop4h 50m
United Airlines
Deal found 3/7£245
Tue 25/800:35
SFO
-
ORD
Nonstop4h 21m
United Airlines
Sat 29/820:09
ORD
-
SFO
Nonstop4h 50m
United Airlines
Deal found 5/7£246
Mon 14/1222:30
SFO
-
ORD
1 stop9h 37m
Delta
Fri 1/107:35
ORD
-
SFO
1 stop9h 33m
Delta
Deal found 3/7£248
Wed 12/808:53
SFO
-
ORD
1 stop8h 04m
Alaska Airlines
Wed 19/806:00
ORD
-
SFO
2 stops10h 52m
Alaska Airlines
Deal found 1/7£250
Tue 25/806:00
SFO
-
ORD
Nonstop4h 29m
United Airlines
Tue 1/915:35
ORD
-
SFO
Nonstop4h 49m
United Airlines
Deal found 4/7£251
Tue 4/813:21
SFO
-
ORD
1 stop8h 15m
Alaska Airlines
Mon 10/806:20
ORD
-
SFO
1 stop7h 29m
Alaska Airlines
Deal found 2/7£251

Find flight deals from San Francisco to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to O'Hare Intl (ORD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 6 July 2026.

Round-trip from

£236

One-way from

£125

Popular in

June

Cheapest in

September

Average price

£337

Good one-way deal

£126 or less
Alaska Airlines
  • Alaska Airlines
  • 3/10-6/10
  • 2 total stops
  • 17h 09m total
  • San Francisco to Chicago
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Alaska Airlines
  • Alaska Airlines
  • 21/8
  • 1 total stop
  • 8h 56m total
  • San Francisco to Chicago
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£22 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£5 potential savings vs. average return price).
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Average for round-trip flights in July 2026
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Price to beat on a one-way flight from San Francisco to Chicago O'Hare Intl.
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Cheapflights Fare Finder

 
Customise your flight search to find flights from San Francisco to O'Hare Intl 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, Cheapflights users made 858,174 searches. Data last updated 6 July 2026.
Use the filters below to find and compare flights from San Francisco to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sat 25/7

15:10-21:38

Nonstop4h 28m

Chicago O'Hare Intl

Wed 29/7

21:35-00:32

Nonstop4h 57m

£251

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 23/10

23:30-05:59

Nonstop4h 29m

Chicago O'Hare Intl

Mon 26/10

21:40-00:36

Nonstop4h 56m

£257

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sat 1/8

16:21-22:59

Nonstop4h 38m

Chicago O'Hare Intl

Tue 4/8

21:35-00:32

Nonstop4h 57m

£260

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 24/7

18:34-00:59

Nonstop4h 25m

Chicago O'Hare Intl

Tue 28/7

07:30-10:19

Nonstop4h 49m

£281

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 27/7

18:34-00:59

Nonstop4h 25m

Chicago O'Hare Intl

Tue 28/7

07:30-10:19

Nonstop4h 49m

£289

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 21/8

15:10-21:30

Nonstop4h 20m

Chicago O'Hare Intl

Mon 31/8

16:20-19:12

Nonstop4h 52m

£293

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 29/7

11:52-23:36

1 stop9h 44m

Chicago O'Hare Intl

Mon 14/12

14:54-23:59

2 stops11h 05m

£300

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 14/8

16:30-22:59

Nonstop4h 29m

Chicago O'Hare Intl

Sun 16/8

07:40-10:26

Nonstop4h 46m

£311
Fastest return journey

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 4/9

18:38-00:59

Nonstop4h 21m

Chicago O'Hare Intl

Sun 6/9

21:28-00:16

Nonstop4h 48m

£311

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 31/8

06:00-12:29

Nonstop4h 29m

Chicago O'Hare Intl

Sun 6/9

07:40-10:26

Nonstop4h 46m

£311

Flights are sorted by cheapest return flights first.

Deals found on 1/7

Showing 1-10 of 24 resultsSorted by cheapest first
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Best time to book a flight from San Francisco to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from San Francisco with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to Chicago O'Hare Intl Airport

How far ahead should I book a flight from San Francisco to Chicago O'Hare Intl Airport?

The best time to book flights from San Francisco to Chicago O'Hare Intl Airport is 66 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from San Francisco to Chicago O'Hare Intl Airport?

Currently, September is the cheapest month in which you can book a flight from San Francisco to Chicago O'Hare Intl Airport (average of £249). Flying from San Francisco to Chicago O'Hare Intl Airport in June is currently the most expensive (average of £380). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SFO to ORD?

Find hourly flight availability from San Francisco to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 6 July 2026.

When flying from San Francisco to Chicago O'Hare Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 42% versus a flight at midday.

How much does it cost for a return flight from San Francisco to Chicago O'Hare Intl Airport?

Related info for your journey

Find useful and relevant information for your journey from San Francisco to O'Hare Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from San Francisco to Chicago O'Hare Intl?

    Most people fly from San Francisco (SFO) if they book a flight from San Francisco to Chicago O'Hare Intl. On average, San Francisco has 75 outbound flights to Chicago O'Hare Intl per day from 0 airlines. San Francisco is conveniently located just 11.0 mi from San Francisco’s city center.

  • How long is the flight from San Francisco to Chicago O'Hare Intl Airport?

    A quick flight from San Francisco to Chicago O'Hare Intl Airport can take about 4h 28m. United Airlines provides one of the quickest options available for as low as £251. There are 1841 mi between San Francisco and Chicago O'Hare Intl Airport. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most reliable airlines from San Francisco to Chicago O'Hare Intl Airport?

    The top 3 most reliable airlines when flying from San Francisco to Chicago O'Hare Intl Airport are ITA Airways (96%), Brussels Airlines (85%) and Austrian Airlines (85%).

  • What are the cheapest flights from San Francisco to Chicago O'Hare Intl Airport?

    Looking at all options, your cheapest flight can be booked for £126. While the most popular route (San Francisco - Chicago O'Hare Intl) can be booked for £192 on average, our data indicates £212 when flying from San Francisco to Chicago O'Hare Intl Airport.

  • Can I find deals for flights from San Francisco to O'Hare Intl that include hotel bookings?

    Yes. In addition to deals on San Francisco to O'Hare Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to O'Hare Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to O'Hare Intl.

  • Can I find deals for business class flights from San Francisco to O'Hare Intl?

    Yes. Cheapflights offers flight deals from San Francisco to O'Hare Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Francisco to Chicago O'Hare Intl Airport?

    Currently, September is the cheapest month in which you can book a flight from San Francisco to Chicago O'Hare Intl Airport (average of £249). Flying from San Francisco to Chicago O'Hare Intl Airport in June is currently the most expensive (average of £380). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Elk Grove Village

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Alternative routes for San Francisco to O'Hare Intl

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Los Angeles to O'Hare Intl flights

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Deals for San Francisco to O'Hare Intl flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from San Francisco to O'Hare Intl?

Millions of users choose and trust Cheapflights to book the best flight deals from San Francisco to O'Hare Intl for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from San Francisco to O'Hare Intl with no change fees?

Yes, we can. To see specific flights from San Francisco to O'Hare Intl with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from San Francisco to O'Hare Intl become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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