Cheap Flights from San Francisco to Illinois from $194 Return

Flight deals from San Francisco to Illinois

Looking for cheap tickets from San Francisco to Illinois, or a last-minute trip? Find the lowest prices on one-way and return tickets right here.

Chicago.$99 per passenger.Departing Sat, 6 Dec.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from San Francisco International on Sat, 6 Dec, arriving in Chicago O'Hare International.Price includes taxes and charges.From $99, select.

Bloomington.$314 per passenger.Departing Wed, 31 Dec.One-way flight with Delta.Outbound indirect flight with Delta, departs from San Francisco International on Wed, 31 Dec, arriving in Central Illinois Regional.Price includes taxes and charges.From $314, select.

Moline.$390 per passenger.Departing Mon, 17 Nov.One-way flight with United.Outbound indirect flight with United, departs from San Francisco International on Mon, 17 Nov, arriving in Moline.Price includes taxes and charges.From $390, select.

Peoria.$392 per passenger.Departing Sun, 14 Dec.One-way flight with United.Outbound indirect flight with United, departs from San Francisco International on Sun, 14 Dec, arriving in Greater Peoria.Price includes taxes and charges.From $392, select.

Springfield.$853 per passenger.Departing Sat, 2 May.One-way flight with jetBlue.Outbound indirect flight with jetBlue, departs from San Francisco International on Sat, 2 May, arriving in Springfield.Price includes taxes and charges.From $853, select.

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Flying from San Francisco to Illinois

Arm yourself with these facts on the fly.

Cheapest flight found	$99
Cheapest month to fly	December
Average flight time	4 hrs, 13 mins
Cheapest airport to fly from	San Francisco International
Most popular airline	United

How to find cheap flights from San Francisco to Illinois

We've compared the best online travel agents and flight providers on the internet to find the cheapest plane tickets from San Francisco to Illinois. Other savvy travellers recently found return flights from $194 and one-way tickets from $99 one-way. Ready to join them? Here are a few tips to help you do it the smart way.

Fly from San Francisco International into Chicago O'Hare International

At the moment, the lowest priced flight tickets to Illinois are from San Francisco International Airport to Chicago O'Hare International Airport.

Fly in November

We crunched the flight calendar and found the cheapest time to fly from San Francisco to Illinois is currently November.

Flex your dates for the best rates

If you’re flexible on your departure dates, you can use Skyscanner's whole month tool to find the cheapest day of the year to fly from San Francisco to anywhere you choose in Illinois.

Watch as fares rise and fall

With Price Alerts, we'll let you know when flight prices from San Francisco to Illinois go up or down so you can book when the time is just right.

Relax – these are fee-free flight tickets

With us, there are no added fees – the Illinois to Illinois flight price you see when you search with us is what you pay to the provider.

Frequently asked questions

What's the average San Francisco to Illinois flight price?

We looked at all of the upcoming return flights from San Francisco to Illinois we could find over the next 12 months. It looks like $194 is the best price. This is good, compared to the average Illinois ticket price of $557.

What is the cheapest month to fly from San Francisco to Illinois?

The cheapest month to fly from San Francisco to Springfield Airport is usually December. The cheapest month to fly from San Francisco to Central Illinois Regional Airport is usually October. The cheapest month to fly from San Francisco to Greater Peoria Airport is usually November. And the cheapest month to fly from San Francisco to Moline Airport is usually October.

Which upcoming date is cheapest to fly from San Francisco to Illinois on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from San Francisco to Illinois on Monday, 3 November 2025.

Are there any direct flights from San Francisco to Illinois?

San Francisco International Airport offers direct flights to Illinois.

If I'm flying from San Francisco, where in Illinois is cheapest to fly into?

If you're flying from San Francisco, the cheapest city in Illinois to fly into is Chicago. The cheapest airport serving Chicago at the moment is Chicago O'Hare International.