O'Hare Intl

$101+ Cheap flights from San Francisco (SFO) to O'Hare Intl (ORD)

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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ORD
Oct 11 — Oct 181
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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 Tuesday and return on a Thursday

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 September 11, 2025.

Round-trip from

$206
(Cheapflightsfares)

One-way from

$101
(Cheapflightsfares)

Popular in

November

Cheapest in

January

Average price

$310

Good round-trip deal

$303 or less

Good one-way deal

$160 or less
From San Francisco to Chicago O'Hare Intl
One-way flight from San Francisco to Chicago O'Hare Intl
Highest demand for flights based on searches. 14% potential increase in price ($59 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT 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.
Price to beat on a one-way 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 September 11, 2025.

This Booking.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2011:00 pmSFO - ORD
1 stop9h 31mFrontier
Tue 9/237:20 amORD - SFO
1 stop17h 10mFrontier
Deal found 9/8$206
This CheapOair deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/37:07 pmSFO - ORD
1 stop24h 21mFrontier
Tue 10/77:15 amORD - SFO
1 stop17h 12mFrontier
Deal found 9/9$207
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/512:00 pmSFO - ORD
1 stop9h 59mAmerican Airlines
Sat 11/88:35 amORD - SFO
Nonstop4h 49mAmerican Airlines
Deal found 9/10$208
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/410:49 amSFO - ORD
1 stop8h 39mFrontier
Mon 10/610:42 amORD - SFO
1 stop12h 39mFrontier
Deal found 9/11$209
This Alaska Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2211:22 amSFO - ORD
1 stop10h 37mAlaska Airlines
Sat 11/82:54 pmORD - SFO
1 stop9h 01mAlaska Airlines
Deal found 9/11$210
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:15 amSFO - ORD
Nonstop4h 31mUnited Airlines
Sun 10/266:15 amORD - SFO
Nonstop4h 49mUnited Airlines
Deal found 9/10$211
This CheapOair deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/128:55 pmSFO - ORD
1 stop25h 48mFrontier
Fri 11/146:20 pmORD - SFO
2 stops24h 23mFrontier
Deal found 9/11$212
This Alaska Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/222:40 pmSFO - ORD
1 stop7h 19mAlaska Airlines
Thu 10/305:53 pmORD - SFO
1 stop7h 57mAlaska Airlines
Deal found 9/11$213
This CheapOair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1010:43 pmSFO - ORD
2 stops23h 16mFrontier
Fri 10/175:25 amORD - SFO
1 stop12h 35mFrontier
Deal found 9/10$214
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2510:37 pmSFO - ORD
1 stop20h 22mFrontier
Thu 10/25:35 amORD - SFO
1 stop9h 42mFrontier
Deal found 9/11$215
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/27:07 pmSFO - ORD
1 stop12h 30mFrontier
Mon 10/66:10 amORD - SFO
2 stops12h 29mFrontier
Deal found 9/10$216
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2911:57 pmSFO - ORD
1 stop8h 43mFrontier
Thu 10/210:42 amORD - SFO
2 stops14h 33mFrontier
Deal found 9/10$217

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated September 11, 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 12/24

11:05 pm-5:27 am

Nonstop4h 22m

Chicago O'Hare Intl

Wed 12/31

9:05 pm-12:03 am

Nonstop4h 58m

$208

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 10/20

1:45 pm-11:50 pm

1 stop8h 05m

Chicago O'Hare Intl

Wed 11/12

2:12 pm-10:25 pm

1 stop10h 13m

$214

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sat 10/25

8:20 am-12:06 am

1 stop13h 46m

Chicago O'Hare Intl

Thu 11/6

2:54 pm-10:01 pm

1 stop9h 07m

$219

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 10/22

12:35 am-8:30 am

1 stop5h 55m

Chicago O'Hare Intl

Tue 10/28

6:05 pm-11:33 pm

1 stop7h 28m

$231

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 10/24

11:00 pm-5:13 am

Nonstop4h 13m

Chicago O'Hare Intl

Mon 10/27

6:15 am-9:04 am

Nonstop4h 49m

$232

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 10/7

12:35 am-8:30 am

1 stop5h 55m

Chicago O'Hare Intl

Thu 10/16

6:05 pm-11:33 pm

1 stop7h 28m

$240

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sat 10/25

6:00 am-5:18 pm

1 stop9h 18m

Chicago O'Hare Intl

Sun 11/9

6:00 am-1:29 pm

1 stop9h 29m

$240

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Thu 10/2

12:45 am-8:25 am

1 stop5h 40m

Chicago O'Hare Intl

Tue 10/7

6:05 pm-11:33 pm

1 stop7h 28m

$241

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 10/10

12:35 am-9:03 am

1 stop6h 28m

Chicago O'Hare Intl

Thu 10/16

6:05 pm-11:33 pm

1 stop7h 28m

$257

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Thu 10/30

7:00 am-6:59 pm

1 stop9h 59m

Chicago O'Hare Intl

Tue 11/4

9:20 am-5:27 pm

2 stops10h 07m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 23 results
1
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The best insider tips for San Francisco to Chicago O'Hare Intl Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your San Francisco to Chicago O'Hare Intl Airport trip
Airlines
United Airlines

Basic Economy allows a personal item only; no carry-on bags unless exceptions apply.


Economy Plus offers extra legroom seats towards the front of the economy cabin.

Alaska Airlines

Saver Fare allows a carry-on bag onboard, unlike many basic economy products.


Alaska's Wi-Fi is a flat fee, making it a bargain for longer flights.

Airports
SFO

Save time at SFO by using the AirTrain Red Line to quickly navigate between terminals and security checkpoints.

Read more about SFOby Harriet Baskas
ORD

For a quick city transfer from ORD, consider taking the “L” train to avoid Chicago traffic delays.

Read more about ORDby Ramsey Qubein
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on United Airlines and SFO

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Robert Schrader

Robert Schrader

Expert on Alaska Airlines

Robert Schrader

Robert Schrader

One of the web's original travel bloggers, Robert launched his first site Leave Your Daily Hell in 2009. Since then, he's expanded into destination niche sites (one each for Japan, Thailand and Taiwan), in addition to having written for the inflight magazines of Singapore Airlines and Korean Air. Overall, he's visited nearly 100 countries, and flies business as often as possible.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on ORD

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

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 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 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 round-trip flight from San Francisco to O'Hare Intl. Price data was last updated on August 29, 2025.

The price you pay for your flight from San Francisco to Chicago O'Hare Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 67 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from San Francisco to Chicago O'Hare Intl Airport?

Currently, August is the cheapest month in which you can book a flight from San Francisco to Chicago O'Hare Intl Airport (average of $245). Flying from San Francisco to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). 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 September 11, 2025.

One of the essential ways to save on airfare from San Francisco to Chicago O'Hare Intl Airport 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 12% on airfare.

What is the cheapest day to fly from San Francisco to Chicago O'Hare Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from San Francisco to O'Hare Intl. Price data was last updated on September 7, 2025.

Travelers seeking maximum savings on their San Francisco to Chicago O'Hare Intl Airport flight should consider departing on Saturday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated September 11, 2025.
See what other customers who have flown with Alaska Airlines, Hawaiian Airlines, and United Airlines from San Francisco to Chicago O'Hare Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.5

Boarding

8.1

Entertainment

7.0

Overall

8.0

Food

7.1

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Crew

8.5

Boarding

8.1

Entertainment

7.0

Overall

8.0

Food

7.1

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Crew

8.5

Boarding

8.1

Entertainment

7.0

Overall

8.0

Food

7.1

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Crew

8.5

Boarding

8.1

Entertainment

7.0

Overall

8.0

Food

7.1

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Crew

8.5

Boarding

8.1

Entertainment

7.0

Overall

8.0

Food

7.1

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Crew

8.5

Boarding

8.1

Entertainment

7.0

Overall

8.0

Food

7.1

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

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?

    If you book a flight to Chicago O'Hare Intl from San Francisco, you will be flying from San Francisco, which is the city’s only airport. San Francisco (SFO) is located 11.8 mi from the center of San Francisco. There are 76 flights from San Francisco to Chicago O'Hare Intl per day from 8 different airlines.

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

    For as low as $208, United Airlines can have you in Chicago O'Hare Intl Airport from San Francisco in 4h 22m. There are 1841 mi between San Francisco and Chicago O'Hare Intl Airport. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from San Francisco to Chicago O'Hare Intl Airport round-trip?

    According to our current data, Hawaiian Airlines ($108), Frontier ($127), and Delta ($128) offers the cheapest pricing from San Francisco to Chicago O'Hare Intl Airport. Hawaiian Airlines is priced at 70% lower than the current average price of a flight leaving 3 months from now.

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

    The cheapest airlines for a one-way flight from San Francisco to Chicago O'Hare Intl Airport are Hawaiian Airlines ($108), Alaska Airlines ($114), and United Airlines ($128).

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

    Before booking your flight to Chicago O'Hare Intl Airport from San Francisco, check out the most reliable airlines to get you to your destination on time: Asiana Airlines (82%), Qatar Airways (81%), Air Canada( 79%).

  • 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 $100. While the most popular route (San Francisco - Chicago O'Hare Intl) can be booked for $165 on average, our data indicates $919 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 vacation 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, August is the cheapest month in which you can book a flight from San Francisco to Chicago O'Hare Intl Airport (average of $245). Flying from San Francisco to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). 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

Traveling 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
Schaumburg
Rosemont
Skokie
Gurnee
Hoffman Estates
Des Plaines
Elgin
Arlington Heights
Beloit
Racine
Rockford
Orland Park
Oak Brook
Downers Grove
Naperville
Elk Grove Village
Evanston
Merrillville
Bridgeview
Warrenville

Browse thousands of different options on Cheapflights for your next trip

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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.

Top 8 airlines flying from San Francisco to O'Hare Intl

Discover the top 8 airlines that operate flights from San Francisco to O'Hare Intl. 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 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$108Average$288FlexibilityNo cancel feeOn-time85%
FrontierCheapest$127Average$222FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$288FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$143Average$221FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$185Average$297FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$196Average$345FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$197Average$348FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$207Average$411FlexibilityNo cancel feeOn-time69%

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