Cheap flights from San Francisco to Illinois from $90
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Illinois departing on 9/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from San Francisco to Illinois
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Illinois?
The cheapest month to fly to Illinois from San Francisco is in February. Flight prices, which tend to average around $286, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $307.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from San Francisco to Illinois is on a Wednesday when prices can be found for as low as $404. Flights from San Francisco to Illinois on a Sunday will generally be more expensive and average around $518. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from San Francisco to Illinois during this time can be as low as $420. Flights at noon are often more expensive with an average ticket price of $490.
What is the cheapest San Francisco to Illinois flight route?
Fly from San Francisco to Chicago O'Hare Intl for the best San Francisco - Illinois flight prices
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $370 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from San Francisco for as low as $293 on momondo.
What cabin class options are available on San Francisco to Illinois flights?
There are 4 cabin classes available to choose from on San Francisco to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from San Francisco to Illinois?
Southwest, United Airlines, and Frontier are the most popular carriers operating from San Francisco to Illinois
What airlines fly to Illinois?
United Airlines, American Airlines and Alaska Airlines are the top three most popular airlines that fly to Illinois from San Francisco according to our data. United Airlines is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 8 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from San Francisco to Illinois on average per day?
85 flights are operational daily from San Francisco to Illinois as of June 2025. The most popular departure time for this route is 8:00AM, with 47% of flights per day taking off at noon.
How many flights depart from San Francisco to Illinois on average per week?
The number of flights available between San Francisco and Illinois is 600 per week as of June 2025. The most frequent departure day is Mon, with 18% of weekly flights leaving on this day.
Cheap San Francisco to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from San Francisco to Illinois
When did momondo last update prices for flights from San Francisco Airport to Illinois?
Prices for flights from San Francisco Airport to Illinois were last updated today.
How many operators does momondo search for flights from San Francisco Airport to Illinois?
There are 8 operators available for flights from San Francisco Airport to Illinois as of June 2025.
How old do you have to be to fly from San Francisco Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San Francisco Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from San Francisco to Illinois?
Based on momondo bookings for flights between San Francisco and Illinois, the leading plane model is Airbus A321neo, making up 15.27% of the total bookings. Other popular models include Boeing 737-800 with 14.36%, Boeing 777 with 14.14%, and Boeing 757-300 with 11.95%.
Best airlines flying from San Francisco to Illinois
Compare and see reviews for airlines that fly from San Francisco to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $48 | Free Cancellation | Rating 5.9 3,301 reviews | |||
| PriceFrom $108 | Free Cancellation | Rating 7.8 2,507 reviews | |||
| PriceFrom $128 | Free Cancellation | Rating 8.0 7,964 reviews | |||
| PriceFrom $133 | Free Cancellation | Rating 7.4 8,810 reviews | |||
| PriceFrom $143 | Free Cancellation | Rating 6.3 8,065 reviews | |||
| PriceFrom $168 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $197 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $209 | Free Cancellation | Rating 8.0 4,280 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from San Francisco to Illinois?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from San Francisco to Illinois for you.
Can I find flights from San Francisco to Illinois with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Illinois from San Francisco with this policy.
How can momondo help me find flights from San Francisco to Illinois?
momondo helps you find the best flight between San Francisco and Illinois by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from San Francisco to Illinois right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Illinois, momondo offers a useful price alert feature which will track prices for flights to Illinois from San Francisco and alert you when they change.