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Cheap flights from Chicago O'Hare Intl Airport to San Francisco from C$ 172

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 18/12. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SFO
26 Nov — 3 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Chicago O'Hare Intl to San Francisco are usually found in May or April, booked 82 days in advance, depart on a Monday or Wednesday and return on a Wednesday

Cheap flight deals from O'Hare Intl to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to San Francisco (SFO). 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 27 October 2025.

Round-trip from

C$ 348

One-way from

C$ 172

Popular in

March

Cheapest in

May

Average price

C$ 466
Alaska Airlines
  • Alaska Airlines
  • 16/12-8/1
  • 2 total stops
  • 18h 37m total
  • Chicago to San Francisco
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Sun Country Air
  • Sun Country Air
  • 18/12
  • 1 total stop
  • 7h 33m total
  • Chicago to San Francisco
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Highest demand for flights based on searches. 1% potential increase in price (C$ 6 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 12 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from O'Hare Intl to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from O'Hare Intl to San Francisco
Explore the most affordable flight options available from O'Hare Intl to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 October 2025.

Tue 16/123:05 p.m.ORD - SFO
1 stop8h 41mAlaska Airlines
Thu 8/111:41 a.m.SFO - ORD
1 stop9h 56mAlaska Airlines
Deal found 27/10C$ 348
Tue 16/123:05 p.m.ORD - SFO
1 stop8h 41mAlaska Airlines
Tue 6/17:00 a.m.SFO - ORD
1 stop8h 12mAlaska Airlines
Deal found 27/10C$ 350
Mon 15/128:59 p.m.ORD - SFO
1 stop13h 07mAlaska Airlines
Wed 7/19:16 a.m.SFO - ORD
1 stop12h 21mAlaska Airlines
Deal found 27/10C$ 353
Mon 24/117:40 p.m.ORD - SFO
1 stop6h 15mDelta
Thu 27/115:45 a.m.SFO - ORD
1 stop7h 17mDelta
Deal found 26/10C$ 354
Thu 18/1211:45 a.m.ORD - SFO
1 stop7h 33mSun Country Air
Tue 30/1211:59 p.m.SFO - ORD
1 stop8h 45mSun Country Air
Deal found 25/10C$ 357
Wed 17/128:55 a.m.ORD - SFO
1 stop14h 51mAlaska Airlines
Wed 7/17:00 a.m.SFO - ORD
1 stop14h 37mAlaska Airlines
Deal found 27/10C$ 364
Fri 5/128:59 p.m.ORD - SFO
1 stop13h 07mAlaska Airlines
Sat 6/122:50 p.m.SFO - ORD
1 stop7h 00mAlaska Airlines
Deal found 27/10C$ 367
Thu 18/127:05 a.m.ORD - SFO
Nonstop4h 50mUnited Airlines
Sun 18/11:35 p.m.SFO - ORD
Nonstop4h 16mUnited Airlines
Deal found 27/10C$ 371
Tue 18/119:20 a.m.ORD - SFO
1 stop6h 48mAlaska Airlines
Tue 18/117:52 p.m.SFO - ORD
1 stop22h 03mAlaska Airlines
Deal found 26/10C$ 374

Cheapflights Fare Finder

 
Customize your flight search to find flights from O'Hare Intl 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, Cheapflights users made 629,999 searches. Data last updated 27 October 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to San Francisco that are best for you.

Fly from

O'Hare Intl

Fly to

San Francisco

Route

Depart

Return

Price

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Sat 21/2

7:45 a.m.-3:52 p.m.

1 stop10h 07m

San Francisco

Thu 26/2

6:00 a.m.-5:04 a.m.

1 stop21h 04m

C$ 374

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Sat 21/2

7:45 a.m.-3:52 p.m.

1 stop10h 07m

San Francisco

Sun 1/3

9:40 p.m.-1:04 p.m.

1 stop13h 24m

C$ 374

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Tue 18/11

2:54 p.m.-10:01 p.m.

1 stop9h 07m

San Francisco

Tue 2/12

7:00 a.m.-11:50 p.m.

1 stop14h 50m

C$ 378

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Fri 9/1

9:00 a.m.-2:02 p.m.

1 stop7h 02m

San Francisco

Tue 13/1

10:12 a.m.-11:37 p.m.

1 stop11h 25m

C$ 379

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Tue 2/12

8:59 p.m.-8:06 a.m.

1 stop13h 07m

San Francisco

Wed 3/12

10:06 a.m.-11:50 p.m.

2 stops11h 44m

C$ 381

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Sat 20/12

7:25 a.m.-12:21 p.m.

1 stop6h 56m

San Francisco

Wed 31/12

10:45 p.m.-9:01 a.m.

1 stop8h 16m

C$ 400

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Mon 24/11

7:40 p.m.-11:55 p.m.

1 stop6h 15m

San Francisco

Mon 1/12

12:30 a.m.-11:40 a.m.

1 stop9h 10m

C$ 407

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Thu 27/11

12:45 p.m.-3:35 p.m.

Nonstop4h 50m

San Francisco

Wed 3/12

10:40 p.m.-5:00 a.m.

Nonstop4h 20m

C$ 428

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Thu 11/12

8:55 a.m.-2:23 p.m.

1 stop7h 28m

San Francisco

Wed 7/1

12:47 a.m.-8:40 a.m.

1 stop5h 53m

C$ 444

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Wed 3/12

8:50 a.m.-1:33 p.m.

1 stop6h 43m

San Francisco

Sun 7/12

12:30 a.m.-8:40 a.m.

1 stop6h 10m

C$ 444

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/10

Showing 1-10 of 23 results
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Best time to book a flight from O'Hare Intl to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from O'Hare Intl with our price prediction graph.
Estimated round-trip 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 Chicago O'Hare Intl Airport to San Francisco

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

Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to San Francisco. Price data was last updated on 24 October 2025.

The best time to book flights from Chicago O'Hare Intl Airport to San Francisco is 82 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 Chicago O'Hare Intl Airport to San Francisco?

Currently, October is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to San Francisco (average of C$ 112). Flying from Chicago O'Hare Intl Airport to San Francisco in December is currently the most expensive (average of C$ 283). 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 ORD to SFO?

Find hourly flight availability from O'Hare Intl to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 27 October 2025.

One of the essential ways to save on airfare from Chicago O'Hare Intl Airport to San Francisco is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 76% on airfare.

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated 27 October 2025.
See what other customers who have flown with Frontier from Chicago O'Hare Intl Airport to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Frontier
5.8
Fair
3,122 reviews
Check prices

Overall

5.8

Comfort

5.5

Crew

6.7

Food

4.6

Entertainment

4.4

Boarding

6.1

Reviews

1 / 20
2.0
Mediocre

Shawn,Sep 2025

SAN - SFO

The flight was over booked and was unadble to get help with issue. I could not get a refund or rebooked in order to make my trip
Frontier
5.8
Fair
3,122 reviews
Frontier
5.8
Fair
3,122 reviews
Check prices

Overall

5.8

Comfort

5.5

Crew

6.7

Food

4.6

Entertainment

4.4

Boarding

6.1

Reviews

1 / 20
2.0
Mediocre

Shawn,Sep 2025

SAN - SFO

The flight was over booked and was unadble to get help with issue. I could not get a refund or rebooked in order to make my trip

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to San Francisco. 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 into for flights to San Francisco from Chicago O'Hare Intl?

    If you book a flight to San Francisco from Chicago O'Hare Intl, you will be flying to San Francisco, which is the city’s only airport. San Francisco (SFO) is located 19.0 km from the centre of San Francisco. There are 59 flights from Chicago O'Hare Intl to San Francisco per day from 1 airline.

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

    There are many flights that can get you from Chicago O'Hare Intl Airport to San Francisco in 7h 33m. Fly via Alaska Airlines or Sun Country Air to get the fastest option. Chicago O'Hare Intl Airport and San Francisco are separated by a distance of 2963 km. Both multi-stop and direct flights can be found to your destination and back.

  • What is the cheapest airline to fly from Chicago O'Hare Intl Airport to San Francisco round-trip?

    According to our current data, Frontier (C$ 249), offers the cheapest pricing from Chicago O'Hare Intl Airport to San Francisco. This flight start at 44% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to San Francisco one-way?

    For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as C$ 176. Users have also found prices from C$ 178 and C$ 178 on Southwest and Delta, respectively.

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

    The top 3 most reliable airlines when flying from Chicago O'Hare Intl Airport to San Francisco are Air China (92%), ANA (92%) and ITA Airways (78%).

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

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

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

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

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

    Yes. Cheapflights offers flight deals from O'Hare Intl to San Francisco 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 Chicago O'Hare Intl Airport to San Francisco?

    Currently, October is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to San Francisco (average of C$ 112). Flying from Chicago O'Hare Intl Airport to San Francisco in December is currently the most expensive (average of C$ 283). 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 San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Richmond
Newark
Alameda
Redwood City
Burlingame
San Bruno
South San Francisco
Scotts Valley
Novato
Santa Clara
Vallejo

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Alternative routes for O'Hare Intl to San Francisco

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

Top airline flying from O'Hare Intl to San Francisco

Discover the top airline that operate flights from O'Hare Intl to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 27 October 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapestC$ 249AverageC$ 363FlexibilityNo cancel feeOn-time62%
Search Frontier flights

Fly with Cheapflights

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

When you search for this flight from O'Hare Intl to San Francisco, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights simply makes it quick and affordable to book flights from O'Hare Intl to San Francisco by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Certainly. Search results for flights to San Francisco from O'Hare Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Of course! You can now track prices for flights from O'Hare Intl to San Francisco and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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