Question 1

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

Accepted Answer

United Airlines, at £152, was found to be the cheapest airline from San Francisco to Chicago O'Hare Intl Airport.Alternate airlines flying return to your destination include Southwest and Alaska Airlines. United Airlines is currently priced 43% below the average price you’ll pay for this route.

Question 2

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

Accepted Answer

To fly one-way, consider booking your trip with Hawaiian Airlines, which is currently one of the cheapest options available, starting at £79. United Airlines flights start at £80 while deals on Southwest start at £84 one-way.

Question 3

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

Accepted Answer

The best time to book flights from San Francisco to Chicago O'Hare Intl Airport is 67 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.

Question 4

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

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from San Francisco to Chicago O'Hare Intl Airport (average of £595). Flying from San Francisco to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £843). 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.

Question 5

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

Accepted Answer

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

Question 6

Weekly flight availability from San Francisco to Chicago O'Hare Intl Airport

Accepted Answer

The most flights from SFO to ORD are scheduled on a Wednesday (90 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (30 on average).

Question 7

E

Accepted Answer

In terms of precipitation, rainfall in Chicago O'Hare Intl Airport ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Chicago O'Hare Intl Airport when rainfall is around 43.0 mm.

Question 8

E

Accepted Answer

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 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

Question 9

What are the cheapest flights from San Francisco to Chicago O'Hare Intl Airport?

Accepted Answer

Looking at all options, your cheapest flight can be booked for £131. While the most popular route (San Francisco - Chicago O'Hare Intl) can be booked for £211 on average our data indicates £171 when flying from San Francisco to Chicago O'Hare Intl Airport.

Question 10

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

Accepted Answer

The top 3 most reliable airlines when flying from San Francisco to Chicago O'Hare Intl Airport are Fiji Airways (100%), Alaska Airlines (87%) and Asiana Airlines (87%).

Question 11

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

Accepted Answer

It’s generally more expensive to depart on a Tuesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

Question 12

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

Accepted Answer

Travelers have found it’s best to book a flight 35 days in advance to save up to 91% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 35 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from San Francisco to Chicago O'Hare Intl Airport 1-2 weeks in advance for as low as £284, or £417 for flights within the next 24 hours.

Question 13

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

Accepted Answer

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, February can be a great choice for travel to Chicago O'Hare Intl Airport. Flights to Chicago O'Hare Intl Airport from San Francisco in February are about £248 on average during February, but can be found for as low as £134.

Question 14

What is the cheapest time of day to fly from SFO to ORD?

Accepted Answer

When flying from San Francisco to Chicago O'Hare Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 48% versus a flight in the morning.

Question 15

What airport do you fly from for flights from San Francisco to Chicago O'Hare Intl?

Accepted Answer

Most people fly from San Francisco (SFO) if they book a flight from San Francisco to Chicago O'Hare Intl. On average, San Francisco has 61 outbound flights to Chicago O'Hare Intl per day from 0 airlines. San Francisco is conveniently located just 11.8 mi from San Francisco’s city center.

Question 16

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

Accepted Answer

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

Question 17

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

Accepted Answer

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.

Question 18

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

Accepted Answer

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.

Question 19

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

Accepted Answer

Deals for San Francisco to O'Hare Intl flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Question 20

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

Accepted Answer

Millions of users choose and trust Cheapflights to book the best flight deals from San Francisco to O'Hare Intl for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Question 21

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

Accepted Answer

Yes, we can. To see specific flights from San Francisco to O'Hare Intl with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Question 22

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

Accepted Answer

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

Round-trip from	£152
One-way from	£79
Popular in	December
Cheapest in	January
Average price	£276
Good one-way deal	£153 or less

Cheap flights from San Francisco to Chicago O'Hare Intl Airport from £79

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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.

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 Monday and return on a Tuesday

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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 4 July 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 4 July 2025.

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Best time to book a flight from San Francisco to O'Hare Intl

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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 return flight from San Francisco to O'Hare Intl. Price data was last updated on 27 June 2025.

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

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 4 July 2025.

Weekly flight availability from San Francisco to Chicago O'Hare Intl Airport

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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?

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

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

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

What are the cheapest flights 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?

How can I 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?

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

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

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

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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 4 July 2025.