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.
$99+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ORD
Apr 29 — May 61
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from San Francisco to O'Hare Intl with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from San Francisco to Chicago O'Hare Intl are usually found in January or September, booked 77 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 April 24, 2025.
Most accurate provider | Mytrip 3 stars |
|---|---|
Most trusted provider | Mytrip 3 stars |
Round-trip from | $208 (Frontier) |
One-way from | $99 (Alaska Airlines) |
Popular in | December |
Cheapest in | January |
Average price | $317 |
Good round-trip deal | $304 or less |
Good one-way deal | $156 or less |
Find flight deals from San Francisco to O'Hare Intl
Cheapest flights from San Francisco to O'Hare IntlExplore 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 April 24, 2025.
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 April 24, 2025.
This Frontier deal was found by Cheapflights users on 4/23. 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.
Wed 5/711:45 pmSFO - ORD
1 stop9h 58mFrontier
Sun 5/118:14 pmORD - SFO
1 stop13h 30mFrontier
Deal found 4/23![Frontier logo]()
$208
This American Airlines deal was found by Cheapflights users on 4/23. 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 9/1010:16 amSFO - ORD
Nonstop4h 25mAmerican Airlines
Mon 9/156:35 pmORD - SFO
Nonstop4h 54mAmerican Airlines
Deal found 4/23![American Airlines logo]()
$209
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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.
Tue 6/312:33 pmSFO - ORD
Nonstop4h 26mAlaska Airlines
Fri 6/62:09 pmORD - SFO
1 stop7h 36mAlaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 6/710:29 pmSFO - ORD
1 stop9h 53mMultiple Airlines
Sat 6/147:18 pmORD - SFO
Nonstop4h 48mMultiple Airlines
Deal found 4/23![Multiple Airlines logo]()
$224
This Hawaiian Airlines deal was found by Cheapflights users on 4/22. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1712:33 pmSFO - ORD
Nonstop4h 26mHawaiian Airlines
Sat 5/177:59 pmORD - SFO
Nonstop4h 50mHawaiian Airlines
Deal found 4/22![Hawaiian Airlines logo]()
$231
This United Airlines deal was found by Cheapflights users on 4/23. 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.
Sat 5/178:35 amSFO - ORD
Nonstop4h 20mUnited Airlines
Mon 5/266:30 amORD - SFO
Nonstop4h 39mUnited Airlines
Deal found 4/23![United Airlines logo]()
$255
This Delta deal was found by Cheapflights users on 4/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/212:40 amSFO - ORD
1 stop5h 44mDelta
Fri 6/61:45 pmORD - SFO
1 stop7h 11mDelta
Deal found 4/24![Delta logo]()
$257
This Southwest deal was found by Cheapflights users on 4/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/195:30 amSFO - ORD
1 stop6h 35mSouthwest
Mon 9/226:55 pmORD - SFO
1 stop6h 15mSouthwest
Deal found 4/23![Southwest logo]()
$272
This Sun Country Air deal was found by Cheapflights users on 4/23. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1311:59 pmSFO - ORD
1 stop19h 40mSun Country Air
Mon 6/166:20 pmORD - SFO
1 stop6h 33mSun Country Air
Deal found 4/23![Sun Country Air logo]()
$275
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 April 24, 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 5/7
11:45 pm-11:43 am
1 stop9h 58m
Chicago O'Hare Intl
Thu 5/8
8:14 pm-7:44 am
1 stop13h 30m
$208
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Wed 9/10
10:16 am-4:41 pm
Nonstop4h 25m
Chicago O'Hare Intl
Mon 9/15
6:35 pm-9:29 pm
Nonstop4h 54m
$209
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Thu 5/29
10:26 pm-10:41 am
1 stop10h 15m
Chicago O'Hare Intl
Sat 5/31
7:59 pm-10:49 pm
Nonstop4h 50m
$213
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Wed 5/21
12:33 pm-6:59 pm
Nonstop4h 26m
Chicago O'Hare Intl
Tue 6/3
7:59 pm-10:49 pm
Nonstop4h 50m
$217
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Sun 5/25
12:33 pm-6:59 pm
Nonstop4h 26m
Chicago O'Hare Intl
Wed 5/28
6:00 am-1:43 pm
1 stop9h 43m
$227
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Tue 6/10
9:00 pm-11:50 am
1 stop12h 50m
Chicago O'Hare Intl
Sat 6/14
4:00 pm-11:10 pm
1 stop9h 10m
$252
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Sat 5/17
8:35 am-2:55 pm
Nonstop4h 20m
Chicago O'Hare Intl
Mon 5/26
6:30 am-9:09 am
Nonstop4h 39m
$255
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Mon 6/30
12:49 am-9:37 pm
1 stop18h 48m
Chicago O'Hare Intl
Thu 7/10
5:20 pm-11:45 pm
1 stop8h 25m
$271
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Fri 6/13
11:59 pm-9:39 pm
1 stop19h 40m
Chicago O'Hare Intl
Mon 6/16
6:20 pm-10:53 pm
1 stop6h 33m
$275
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Mon 4/28
11:38 pm-10:45 am
1 stop9h 07m
$101
Showing 1-10 of 18 results
Compare providers for flights from San Francisco to O'Hare Intl
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Francisco to O'Hare Intl in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on San Francisco-Chicago O'Hare Intl Airport flights, users find the pricing of Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on San Francisco-Chicago O'Hare Intl Airport flight deals on Cheapflights vs. Mytrip >95% of the time. Price accuracy is based on data collected from San Francisco-Chicago O'Hare Intl Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Francisco-Chicago O'Hare Intl Airport flights, Cheapflights users trust Mytrip the most. Mytrip has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Francisco-Chicago O'Hare Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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]()
United Airlines
![Alaska Airlines]()
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
Our travel experts
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 April 18, 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 77 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 April 24, 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 21% 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 March 30, 2025.
Travelers seeking maximum savings on their San Francisco to Chicago O'Hare Intl Airport flight should consider departing on Tuesday 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.
Weekly flight availability from San Francisco to Chicago O'Hare Intl Airport
Explore weekly flight availability from San Francisco to O'Hare Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 24, 2025.
The most flights from SFO to ORD are scheduled on a Thursday (82 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (48 on average).
Rainfall in O'Hare Intl by month
Plan your trip to O'Hare Intl by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Chicago O'Hare Intl Airport ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago O'Hare Intl Airport when rainfall is around 1.7 in.
Temperature in O'Hare Intl by month
Plan your trip to O'Hare Intl by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Chicago O'Hare Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).
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 April 24, 2025.
Read through reviews of airlines operating flights from San Francisco to Chicago, such as Alaska Airlines, Southwest and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Food
7.1
Boarding
8.2
Entertainment
7.1
Overall
8.0
Comfort
7.9
Reviews
1 / 20
10.0
ExcellentCheri,Jan 2025
FAT - SEA
Crew
8.5
Food
7.1
Boarding
8.2
Entertainment
7.1
Overall
8.0
Comfort
7.9
Reviews
1 / 20
10.0
ExcellentCheri,Jan 2025
FAT - SEA
Crew
8.5
Food
7.1
Boarding
8.2
Entertainment
7.1
Overall
8.0
Comfort
7.9
Reviews
1 / 20
10.0
ExcellentCheri,Jan 2025
FAT - SEA
Crew
8.5
Food
7.1
Boarding
8.2
Entertainment
7.1
Overall
8.0
Comfort
7.9
Reviews
1 / 20
10.0
ExcellentCheri,Jan 2025
FAT - SEA
Crew
8.5
Food
7.1
Boarding
8.2
Entertainment
7.1
Overall
8.0
Comfort
7.9
Reviews
1 / 20
10.0
ExcellentCheri,Jan 2025
FAT - SEA
Crew
8.5
Food
7.1
Boarding
8.2
Entertainment
7.1
Overall
8.0
Comfort
7.9
Reviews
1 / 20
10.0
ExcellentCheri,Jan 2025
FAT - SEA
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.
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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 7 airlines flying from San Francisco to O'Hare Intl
Discover the top 7 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 April 24, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$113 | Average$239 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$126 | Average$205 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$138 | Average$287 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$175 | Average$329 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$203 | Average$374 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$207 | Average$428 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$236 | Average$295 | FlexibilityNo cancel fee | On-timeN/A |