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Cheap flights from San Francisco to Chicago O'Hare Intl Airport from £81

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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ORD
22 Mar — 29 Mar1
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 April, booked 67 days in advance, depart on a Monday or Wednesday 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 20 February 2026.

Tue 21/417:49
SFO
-
ORD
1 stop10h 01m
Frontier
Mon 27/407:43
ORD
-
SFO
2 stops11h 09m
Frontier
Deal found 17/2£174
Mon 30/321:35
SFO
-
ORD
1 stop8h 55m
Delta
Thu 2/407:25
ORD
-
SFO
1 stop10h 39m
Delta
Deal found 20/2£176
Mon 11/521:10
SFO
-
ORD
1 stop7h 30m
Alaska Airlines
Tue 19/514:10
ORD
-
SFO
1 stop7h 10m
Alaska Airlines
Deal found 18/2£178
Tue 17/315:15
SFO
-
ORD
Nonstop4h 22m
United Airlines
Thu 19/307:45
ORD
-
SFO
Nonstop5h 10m
United Airlines
Deal found 19/2£179
Mon 16/323:59
SFO
-
ORD
Nonstop4h 18m
United Airlines
Thu 19/307:45
ORD
-
SFO
Nonstop5h 10m
United Airlines
Deal found 20/2£181
Mon 16/322:45
SFO
-
ORD
Nonstop4h 22m
United Airlines
Fri 20/306:17
ORD
-
SFO
Nonstop5h 05m
United Airlines
Deal found 17/2£184
Fri 13/315:15
SFO
-
ORD
Nonstop4h 21m
United Airlines
Wed 25/306:17
ORD
-
SFO
Nonstop5h 05m
United Airlines
Deal found 19/2£186
Sat 14/318:44
SFO
-
ORD
Nonstop4h 15m
United Airlines
Sat 21/319:50
ORD
-
SFO
Nonstop5h 06m
United Airlines
Deal found 17/2£189
Fri 27/317:15
SFO
-
ORD
Nonstop4h 23m
United Airlines
Mon 30/321:20
ORD
-
SFO
Nonstop4h 59m
United Airlines
Deal found 18/2£193
Wed 6/507:04
SFO
-
ORD
2 stops9h 59m
Alaska Airlines
Wed 13/514:10
ORD
-
SFO
1 stop9h 21m
Alaska Airlines
Deal found 19/2£196
Wed 18/315:15
SFO
-
ORD
Nonstop4h 22m
United Airlines
Sat 21/321:15
ORD
-
SFO
Nonstop5h 01m
United Airlines
Deal found 17/2£197
Thu 2/419:00
SFO
-
ORD
Nonstop4h 28m
United Airlines
Mon 6/422:45
ORD
-
SFO
Nonstop4h 50m
United Airlines
Deal found 18/2£197

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 20 February 2026.

Round-trip from

£174

One-way from

£81

Popular in

November

Cheapest in

September

Average price

£305
Frontier
  • Frontier
  • 21/4-27/4
  • 3 total stops
  • 21h 10m total
  • San Francisco to Chicago
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United Airlines
  • United Airlines
  • 8/5
  • Nonstop
  • 4h 24m total
  • San Francisco to Chicago
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£38 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
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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 20 February 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

San Francisco

Fly to

O'Hare Intl

Route

Depart

Return

Price

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 1/4

05:50-16:43

1 stop8h 53m

Chicago O'Hare Intl

Tue 7/4

07:25-16:04

1 stop10h 39m

£176

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 17/3

16:21-06:39

1 stop12h 18m

Chicago O'Hare Intl

Tue 24/3

08:00-17:44

2 stops11h 44m

£208

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 18/5

00:05-08:25

1 stop6h 20m

Chicago O'Hare Intl

Tue 26/5

19:45-23:57

1 stop6h 12m

£211

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 20/3

05:50-16:43

1 stop8h 53m

Chicago O'Hare Intl

Wed 25/3

19:10-23:59

1 stop6h 49m

£221

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sun 26/4

05:55-16:39

1 stop8h 44m

Chicago O'Hare Intl

Mon 27/4

19:09-23:54

1 stop6h 45m

£221

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 11/3

17:15-23:38

Nonstop4h 23m

Chicago O'Hare Intl

Fri 13/3

07:45-10:55

Nonstop5h 10m

£224

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 31/3

18:29-00:59

Nonstop4h 30m

Chicago O'Hare Intl

Sat 11/4

07:40-10:38

Nonstop4h 58m

£228

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Thu 16/4

00:45-07:07

Nonstop4h 22m

Chicago O'Hare Intl

Thu 23/4

15:45-18:38

Nonstop4h 53m

£228

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Thu 9/4

19:00-01:28

Nonstop4h 28m

Chicago O'Hare Intl

Fri 1/5

08:40-11:24

Nonstop4h 44m

£228

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Thu 12/3

22:45-05:07

Nonstop4h 22m

Chicago O'Hare Intl

Wed 18/3

06:17-09:22

Nonstop5h 05m

£228

Flights are sorted by cheapest return flights first.

Deals found on 17/2

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 20 February 2026.

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, April is the cheapest month in which you can book a flight from San Francisco to Chicago O'Hare Intl Airport (average of £91). Flying from San Francisco to Chicago O'Hare Intl Airport in November is currently the most expensive (average of £191). 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 20 February 2026.

When flying from San Francisco to Chicago O'Hare Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 59 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 59m. Delta provides one of the quickest options available for as low as £176. 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 Iberia (95%), Qatar Airways (95%) and Gulf Air (94%).

  • 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, April is the cheapest month in which you can book a flight from San Francisco to Chicago O'Hare Intl Airport (average of £91). Flying from San Francisco to Chicago O'Hare Intl Airport in November is currently the most expensive (average of £191). 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

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to O'Hare Intl flights

Fly with Cheapflights

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How does Cheapflights help users find flights from San Francisco to O'Hare Intl?

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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