Cheap flights from San Francisco to Chicago O'Hare Intl Airport from £79

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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ORD
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from San Francisco to Chicago O'Hare Intl are usually found in January or April, booked 67 days in advance, depart on a Wednesday or Friday and return on a Monday

Cheap 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 18 September 2025.

Round-trip from

£154

One-way from

£79

Popular in

November

Cheapest in

January

Average price

£235

Good round-trip deal

£384 or less
Alaska Airlines
  • Alaska Airlines
  • 10/12-15/12
  • 3 total stops
  • 25h 51m total
  • San Francisco to Chicago
Frontier
  • Frontier
  • 16/10
  • 1 total stop
  • 12h 33m total
  • San Francisco to Chicago
Highest demand for flights based on searches. 15% potential increase in price (£37 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£6 potential savings vs. average return price).
Average for round-trip flights in September 2025
Price to beat on a round-trip flight from San Francisco to Chicago O'Hare Intl.

Find flight deals from San Francisco to O'Hare Intl

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 18 September 2025.

Wed 10/1210:06SFO - ORD
2 stops11h 44mAlaska Airlines
Mon 15/1219:59ORD - SFO
1 stop14h 07mAlaska Airlines
Deal found 16/9£154
Fri 12/1207:00SFO - ORD
1 stop9h 54mAlaska Airlines
Mon 15/1219:59ORD - SFO
1 stop14h 07mAlaska Airlines
Deal found 17/9£155
Wed 10/1208:09SFO - ORD
1 stop8h 45mHawaiian Airlines
Tue 16/1215:05ORD - SFO
1 stop8h 41mHawaiian Airlines
Deal found 16/9£160
Sat 1/1107:00SFO - ORD
1 stop14h 59mAlaska Airlines
Tue 4/1109:20ORD - SFO
2 stops10h 07mAlaska Airlines
Deal found 17/9£174
Tue 21/1010:26SFO - ORD
1 stop11h 33mAlaska Airlines
Wed 12/1109:20ORD - SFO
1 stop14h 41mAlaska Airlines
Deal found 16/9£174
Thu 11/1208:09SFO - ORD
1 stop8h 45mHawaiian Airlines
Mon 15/1215:05ORD - SFO
1 stop8h 41mHawaiian Airlines
Deal found 16/9£178
Tue 14/1010:26SFO - ORD
1 stop11h 33mAlaska Airlines
Sat 18/1017:59ORD - SFO
1 stop17h 17mAlaska Airlines
Deal found 17/9£183
Fri 10/1012:00SFO - ORD
1 stop9h 59mAlaska Airlines
Wed 15/1019:59ORD - SFO
1 stop14h 06mAlaska Airlines
Deal found 17/9£184
Fri 31/1007:00SFO - ORD
1 stop14h 59mAlaska Airlines
Tue 4/1108:00ORD - SFO
2 stops11h 27mAlaska Airlines
Deal found 17/9£188
Tue 21/1010:26SFO - ORD
1 stop11h 33mAlaska Airlines
Thu 6/1114:54ORD - SFO
1 stop9h 07mAlaska Airlines
Deal found 17/9£188

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 18 September 2025.
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

San Francisco

Fly to

O'Hare Intl

Route

Depart

Return

Price

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 10/12

08:09-18:54

1 stop8h 45m

Chicago O'Hare Intl

Tue 16/12

15:05-21:46

1 stop8h 41m

£160

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 4/11

10:35-23:59

1 stop11h 24m

Chicago O'Hare Intl

Fri 7/11

14:54-22:18

1 stop9h 24m

£174

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 5/11

07:00-23:59

1 stop14h 59m

Chicago O'Hare Intl

Sat 8/11

20:59-08:50

1 stop13h 51m

£204

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 3/12

06:00-15:23

1 stop7h 23m

Chicago O'Hare Intl

Sun 7/12

07:47-15:57

1 stop10h 10m

£204

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 17/12

08:09-18:54

1 stop8h 45m

Chicago O'Hare Intl

Fri 16/1

14:59-20:04

1 stop7h 05m

£205

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 5/1

19:48-14:37

1 stop16h 49m

Chicago O'Hare Intl

Sat 31/1

14:59-23:33

1 stop10h 34m

£205

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 14/10

12:30-23:05

1 stop8h 35m

Chicago O'Hare Intl

Wed 29/10

07:00-14:10

2 stops9h 10m

£221

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 15/10

06:00-17:10

1 stop9h 10m

Chicago O'Hare Intl

Sat 25/10

17:15-22:16

1 stop7h 01m

£225

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 14/10

13:45-23:50

1 stop8h 05m

Chicago O'Hare Intl

Thu 23/10

07:37-16:05

1 stop10h 28m

£225

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sat 1/11

05:00-13:05

1 stop6h 05m

Chicago O'Hare Intl

Tue 4/11

14:15-22:30

2 stops10h 15m

£229

Flights are sorted by cheapest return flights first.

Deals found on 18/9

Showing 1-10 of 22 results
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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?

Use this chart to determine the optimal time to book a return flight from San Francisco to O'Hare Intl. Price data was last updated on 12 September 2025.

The best time to book flights from San Francisco to Chicago O'Hare Intl Airport is 67 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, January is the cheapest month in which you can book a flight from San Francisco to Chicago O'Hare Intl Airport (average of £595). Flying from San Francisco to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £843). 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 18 September 2025.

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 afternoon, which can drop the price by up to 46% versus a flight in the morning.

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 79 outbound flights to Chicago O'Hare Intl per day from 0 airlines. San Francisco is conveniently located just 11.8 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 8h 45m. Hawaiian Airlines provides one of the quickest options available for as low as £160. 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 (100%), Fiji Airways (83%) and Asiana Airlines (83%).

  • 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 £260. While the most popular route (San Francisco - Chicago O'Hare Intl) can be booked for £148 on average, our data indicates £487 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, January is the cheapest month in which you can book a flight from San Francisco to Chicago O'Hare Intl Airport (average of £595). Flying from San Francisco to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £843). 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
Downers Grove
Elk Grove Village
Rosemont

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Alternative routes for San Francisco to O'Hare Intl

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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.

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