Cheap flights from San Francisco Bay Area to Illinois from $56
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 Bay Area to Illinois departing on 7/1. 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 Bay Area 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 Bay Area 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 Bay Area to Illinois is on a Wednesday when prices can be found for as low as $405. Flights from San Francisco Bay Area to Illinois on a Sunday will generally be more expensive and average around $526. 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 Bay Area to Illinois during this time can be as low as $416. Flights at noon are often more expensive with an average ticket price of $494.
What is the cheapest San Francisco Bay Area to Illinois flight route?
Fly from San Francisco to Chicago O'Hare Intl for the best San Francisco Bay Area - 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 Bay Area when booking 17 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $371 when searching 17 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from San Francisco Bay Area for as low as $293 on momondo.
What cabin class options are available on San Francisco Bay Area to Illinois flights?
There are 4 cabin classes available to choose from on San Francisco Bay Area 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 Bay Area to Illinois?
Spirit Airlines, Frontier, and Southwest are the most popular carriers operating from San Francisco Bay Area 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 Bay Area according to our data. United Airlines is the first choice among our users, with 50% 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 Bay Area to Illinois on average per day?
As of June 2025, there are 92 flights per day flying from San Francisco Bay Area to Illinois. The most common time of day flights depart is 10:00AM, with 46% of flights taking off at noon.
How many flights depart from San Francisco Bay Area to Illinois on average per week?
As of June 2025, 646 flights take off from San Francisco Bay Area and land in Illinois each week. The most common flight departure day for this route is Thu, with 19% of weekly flights taking off on this day.
Cheap San Francisco Bay Area to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from San Francisco Bay Area to Illinois
When did momondo last update prices for flights from San Francisco Bay Area to Illinois?
Prices for flights from San Francisco Bay Area to Illinois are updated daily.
How many operators does momondo search for flights from San Francisco Bay Area to Illinois?
As of June 2025, there are 8 operators available to choose from for flights from San Francisco Bay Area to Illinois.
How old do you have to be to fly from San Francisco Bay Area 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 Bay Area 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 Bay Area to Illinois?
Based on momondo bookings for flights between San Francisco Bay Area and Illinois, the leading plane model is Boeing 737-800, making up 19.90% of the total bookings. Other popular models include Airbus A321neo with 8.58%, Boeing 737 MAX 8 with 8.19%, and Boeing 737-900 with 7.81%.
Best airlines flying from San Francisco Bay Area to Illinois
Compare and see reviews for airlines that fly from San Francisco Bay Area to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $48 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $108 | Free Cancellation | Rating 6.3 8,052 reviews | |||
| PriceFrom $108 | Free Cancellation | Rating 7.8 2,494 reviews | |||
| PriceFrom $133 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $138 | 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 4,287 reviews | |||
| PriceFrom $236 | Free Cancellation | Rating 8.0 7,950 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from San Francisco Bay Area to Illinois?
Finding the right flight to Illinois from San Francisco Bay Area is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.
Can I find flights from San Francisco Bay Area to Illinois with flexible booking policies on momondo?
Flights from San Francisco Bay Area to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from San Francisco Bay Area to Illinois?
momondo provides multiple filters to help you find the best flight to Illinois from San Francisco Bay Area. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from San Francisco Bay Area to Illinois right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of San Francisco Bay Area to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.