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Cheap flights from Chicago O'Hare Intl Airport to San Francisco from C$ 141

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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SFO
11 Oct — 18 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Chicago O'Hare Intl to San Francisco are usually found in April or May, booked 89 days in advance, depart on a Thursday or Tuesday and return on a Friday

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 11 September 2025.

Round-trip from

C$ 294

One-way from

C$ 141

Popular in

March

Cheapest in

April

Average price

C$ 406
Southwest
  • Southwest
  • 6/12-10/12
  • 3 total stops
  • 15h 40m total
  • Chicago to San Francisco
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Alaska Airlines
  • Alaska Airlines
  • 14/1
  • 1 total stop
  • 10h 18m total
  • Chicago to San Francisco
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Highest demand for flights based on searches. 2% potential increase in price (C$ 17 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 13 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from O'Hare Intl to San Francisco

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 11 September 2025.

Sat 6/123:05 p.m.ORD - SFO
1 stop6h 45mSouthwest
Wed 10/1211:40 a.m.SFO - ORD
2 stops8h 55mSouthwest
Deal found 10/9C$ 294
Sat 25/106:00 a.m.ORD - SFO
1 stop17h 12mAlaska Airlines
Tue 4/119:00 a.m.SFO - ORD
1 stop13h 24mAlaska Airlines
Deal found 11/9C$ 295
Thu 2/106:10 p.m.ORD - SFO
1 stop7h 19mDelta
Tue 7/106:00 a.m.SFO - ORD
1 stop9h 10mDelta
Deal found 10/9C$ 297
Thu 30/105:16 p.m.ORD - SFO
Nonstop4h 52mUnited Airlines
Fri 31/1010:40 p.m.SFO - ORD
Nonstop4h 20mUnited Airlines
Deal found 9/9C$ 298
Fri 12/123:05 p.m.ORD - SFO
1 stop8h 41mAlaska Airlines
Mon 15/126:13 p.m.SFO - ORD
1 stop17h 56mAlaska Airlines
Deal found 11/9C$ 299
Thu 9/106:15 a.m.ORD - SFO
Nonstop4h 41mUnited Airlines
Sun 12/105:15 a.m.SFO - ORD
Nonstop4h 31mUnited Airlines
Deal found 10/9C$ 305
Tue 30/912:40 p.m.ORD - SFO
1 stop7h 15mSouthwest
Wed 8/105:30 a.m.SFO - ORD
2 stops9h 15mSouthwest
Deal found 10/9C$ 308
Sat 18/107:37 a.m.ORD - SFO
1 stop10h 28mDelta
Sat 25/106:00 a.m.SFO - ORD
1 stop9h 18mDelta
Deal found 10/9C$ 309
Thu 2/106:15 a.m.ORD - SFO
2 stops8h 30mSouthwest
Sat 4/105:00 a.m.SFO - ORD
1 stop6h 05mSouthwest
Deal found 10/9C$ 312
Wed 3/127:15 a.m.ORD - SFO
2 stops14h 55mSouthwest
Tue 9/1210:30 a.m.SFO - ORD
2 stops10h 05mSouthwest
Deal found 10/9C$ 315
Wed 8/106:00 a.m.ORD - SFO
1 stop10h 55mAlaska Airlines
Wed 15/102:40 p.m.SFO - ORD
1 stop7h 19mAlaska Airlines
Deal found 10/9C$ 316
Tue 21/108:20 a.m.ORD - SFO
1 stop7h 41mAlaska Airlines
Wed 22/108:20 a.m.SFO - ORD
1 stop13h 39mAlaska Airlines
Deal found 10/9C$ 319

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 11 September 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 25/10

8:00 a.m.-10:29 p.m.

1 stop16h 29m

San Francisco

Tue 4/11

8:00 a.m.-12:24 a.m.

1 stop14h 24m

C$ 295

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Fri 12/12

3:05 p.m.-9:46 p.m.

1 stop8h 41m

San Francisco

Mon 15/12

6:13 p.m.-2:09 p.m.

1 stop17h 56m

C$ 299

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Sat 7/2

2:00 p.m.-10:18 p.m.

1 stop10h 18m

San Francisco

Mon 9/2

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

1 stop13h 24m

C$ 316

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Tue 16/12

9:15 a.m.-5:24 p.m.

2 stops10h 09m

San Francisco

Wed 31/12

7:00 a.m.-11:59 p.m.

1 stop14h 59m

C$ 319

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Wed 8/10

6:05 p.m.-11:33 p.m.

1 stop7h 28m

San Francisco

Fri 10/10

12:35 a.m.-9:03 a.m.

1 stop6h 28m

C$ 334

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Mon 26/1

2:05 p.m.-11:43 p.m.

2 stops11h 38m

San Francisco

Thu 29/1

9:10 a.m.-11:59 p.m.

1 stop12h 49m

C$ 337

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Sat 13/12

8:00 a.m.-9:34 p.m.

1 stop15h 34m

San Francisco

Sat 10/1

8:00 a.m.-11:59 p.m.

2 stops13h 59m

C$ 344

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Sat 18/10

7:00 a.m.-4:45 p.m.

2 stops11h 45m

San Francisco

Sat 25/10

5:00 a.m.-1:05 p.m.

1 stop6h 05m

C$ 345

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Sat 1/11

2:20 p.m.-8:04 p.m.

1 stop7h 44m

San Francisco

Fri 7/11

12:35 a.m.-9:03 a.m.

1 stop6h 28m

C$ 346

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Wed 8/10

7:37 a.m.-4:05 p.m.

1 stop10h 28m

San Francisco

Fri 17/10

12:35 a.m.-11:28 a.m.

1 stop8h 53m

C$ 348

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

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 29 August 2025.

The best time to book flights from Chicago O'Hare Intl Airport to San Francisco is 89 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, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to San Francisco (average of C$ 276). Flying from Chicago O'Hare Intl Airport to San Francisco in December is currently the most expensive (average of C$ 368). 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 11 September 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 at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 80% 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 11 September 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
3,177 reviews
Check prices

Comfort

5.5

Entertainment

4.4

Overall

5.8

Food

4.7

Crew

6.7

Boarding

6.1

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

MCO - DFW

Frontier likes to promote themselves as being a cheap airline to fly, but in the end, that’s laughable. Only AFTER I booked through you, and then had to go to their site to choose my seats and baggage, did I find they charged a $75 “Passenger” fee. No explanation on what that was even for. Then for them to charge $5 for sodas, and who knows what for any small snack, is just insulting.
Frontier
5.8
Fair
3,177 reviews
Frontier
5.8
Fair
3,177 reviews
Check prices

Comfort

5.5

Entertainment

4.4

Overall

5.8

Food

4.7

Crew

6.7

Boarding

6.1

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

MCO - DFW

Frontier likes to promote themselves as being a cheap airline to fly, but in the end, that’s laughable. Only AFTER I booked through you, and then had to go to their site to choose my seats and baggage, did I find they charged a $75 “Passenger” fee. No explanation on what that was even for. Then for them to charge $5 for sodas, and who knows what for any small snack, is just insulting.

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 64 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 28m. Fly via Alaska Airlines or Delta 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$ 247), offers the cheapest pricing from Chicago O'Hare Intl Airport to San Francisco. This flight start at 43% lower than the current average price 3 months from now.

  • 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 (79%), ANA (79%) and Austrian Airlines (75%).

  • 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, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to San Francisco (average of C$ 276). Flying from Chicago O'Hare Intl Airport to San Francisco in December is currently the most expensive (average of C$ 368). 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
Belmont
Novato
Millbrae
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 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapestC$ 247AverageC$ 360FlexibilityNo 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?

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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?

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