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Cheap flights from Chicago O'Hare Intl Airport to San Francisco from C$ 177

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 24/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SFO
11 Jan — 18 Jan1
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 Tuesday or Monday and return on a Wednesday

Cheap 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 12 December 2025.

Sun 21/1210:49 p.m.ORD - SFO
1 stop10h 59mFrontier
Thu 1/16:00 a.m.SFO - ORD
1 stop6h 17mFrontier
Deal found 9/12C$ 354
Sun 21/1210:49 p.m.ORD - SFO
1 stop10h 59mFrontier
Wed 31/126:24 a.m.SFO - ORD
1 stop15h 48mFrontier
Deal found 9/12C$ 383
Sun 21/1210:49 p.m.ORD - SFO
1 stop10h 59mFrontier
Tue 30/126:00 a.m.SFO - ORD
1 stop6h 17mFrontier
Deal found 9/12C$ 393
Thu 18/123:27 p.m.ORD - SFO
1 stop8h 09mFrontier
Wed 31/126:24 a.m.SFO - ORD
1 stop15h 48mFrontier
Deal found 9/12C$ 404
Sun 21/1210:49 p.m.ORD - SFO
1 stop10h 59mFrontier
Mon 29/126:24 a.m.SFO - ORD
1 stop15h 48mFrontier
Deal found 9/12C$ 430
Thu 18/123:27 p.m.ORD - SFO
1 stop8h 09mFrontier
Mon 29/126:24 a.m.SFO - ORD
1 stop15h 48mFrontier
Deal found 9/12C$ 440
Wed 24/127:45 p.m.ORD - SFO
Nonstop5h 10mUnited Airlines
Wed 31/1211:35 p.m.SFO - ORD
Nonstop4h 23mUnited Airlines
Deal found 11/12C$ 452
Sun 21/1210:49 p.m.ORD - SFO
1 stop10h 59mFrontier
Sun 28/129:56 p.m.SFO - ORD
1 stop12h 26mFrontier
Deal found 9/12C$ 465
Wed 17/124:38 p.m.ORD - SFO
2 stops17h 45mMultiple Airlines
Thu 1/16:00 a.m.SFO - ORD
1 stop6h 17mMultiple Airlines
Deal found 9/12C$ 481
Thu 25/126:25 p.m.ORD - SFO
Nonstop5h 04mUnited Airlines
Wed 31/125:00 a.m.SFO - ORD
Nonstop4h 25mUnited Airlines
Deal found 10/12C$ 494
Wed 17/124:38 p.m.ORD - SFO
2 stops17h 45mMultiple Airlines
Wed 31/126:24 a.m.SFO - ORD
1 stop15h 48mMultiple Airlines
Deal found 9/12C$ 502
Thu 25/1210:46 a.m.ORD - SFO
2 stops14h 04mDelta
Thu 1/15:50 a.m.SFO - ORD
1 stop9h 32mDelta
Deal found 11/12C$ 503

Find 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 12 December 2025.

Round-trip from

C$ 335

One-way from

C$ 177

Popular in

November

Cheapest in

May

Average price

C$ 534
Alaska Airlines
  • Alaska Airlines
  • 3/2-5/2
  • 2 total stops
  • 21h 53m total
  • Chicago to San Francisco
Search Deals
United Airlines
  • United Airlines
  • 13/1
  • Nonstop
  • 4h 50m total
  • Chicago to San Francisco
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 90 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 12 December 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 17/1

7:58 p.m.-11:00 p.m.

Nonstop5h 02m

San Francisco

Mon 19/1

11:15 p.m.-5:44 a.m.

Nonstop4h 29m

C$ 342

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Fri 16/1

11:05 a.m.-6:38 p.m.

1 stop9h 33m

San Francisco

Sun 18/1

2:05 p.m.-11:59 p.m.

1 stop7h 54m

C$ 342

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Tue 6/1

6:00 a.m.-6:07 p.m.

1 stop14h 07m

San Francisco

Wed 7/1

12:00 p.m.-11:50 p.m.

1 stop9h 50m

C$ 345

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Fri 20/2

7:00 a.m.-9:55 p.m.

1 stop16h 55m

San Francisco

Wed 25/2

1:45 p.m.-11:56 p.m.

1 stop8h 11m

C$ 345

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Tue 24/2

2:07 p.m.-7:47 p.m.

1 stop7h 40m

San Francisco

Thu 5/3

6:30 a.m.-11:56 p.m.

1 stop15h 26m

C$ 345

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Thu 26/2

1:00 p.m.-11:59 p.m.

1 stop12h 59m

San Francisco

Wed 4/3

6:30 a.m.-4:33 p.m.

1 stop8h 03m

C$ 345

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Thu 19/2

2:20 p.m.-10:41 p.m.

1 stop10h 21m

San Francisco

Sat 28/2

10:54 p.m.-9:41 a.m.

1 stop8h 47m

C$ 350

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Sat 7/2

8:45 a.m.-11:42 a.m.

Nonstop4h 57m

San Francisco

Tue 10/2

4:55 p.m.-11:14 p.m.

Nonstop4h 19m

C$ 352

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Wed 28/1

6:47 a.m.-9:40 a.m.

Nonstop4h 53m

San Francisco

Wed 4/2

11:15 p.m.-5:44 a.m.

Nonstop4h 29m

C$ 352

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Fri 13/3

5:29 p.m.-10:37 a.m.

1 stop19h 08m

San Francisco

Mon 16/3

8:42 a.m.-11:56 p.m.

1 stop13h 14m

C$ 356

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/12

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 5 December 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$ 110). Flying from Chicago O'Hare Intl Airport to San Francisco in November is currently the most expensive (average of C$ 285). 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 12 December 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 at noon could potentially save you up to 75% on airfare.

How much does it cost to fly round-trip from Chicago O'Hare Intl Airport to San Francisco?

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 12 December 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
3,084 reviews
Check prices

Food

4.6

Comfort

5.5

Crew

6.6

Boarding

6.0

Entertainment

4.4

Overall

5.8

Reviews

1 / 20
4.0
Okay

Chase,Nov 2025

SLC - SEA

Worst part was not frontiers fault but being stuck on the tarmac for an hour at our arrival destination because of another planes issue and the lack of clear communication (said from the pilot himself)
Frontier
5.8
Fair
3,084 reviews
Frontier
5.8
Fair
3,084 reviews
Check prices

Food

4.6

Comfort

5.5

Crew

6.6

Boarding

6.0

Entertainment

4.4

Overall

5.8

Reviews

1 / 20
4.0
Okay

Chase,Nov 2025

SLC - SEA

Worst part was not frontiers fault but being stuck on the tarmac for an hour at our arrival destination because of another planes issue and the lack of clear communication (said from the pilot himself)

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 51 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 9h 03m. 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$ 246), offers the cheapest pricing from Chicago O'Hare Intl Airport to San Francisco. This flight start at 45% 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 ANA (89%), Air China (84%) and China Southern (77%).

  • 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$ 110). Flying from Chicago O'Hare Intl Airport to San Francisco in November is currently the most expensive (average of C$ 285). 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
Redwood City
Burlingame
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 12 December 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapestC$ 246AverageC$ 358FlexibilityNo cancel feeOn-time62%
Search Frontier flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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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