Cheap flights from Chicago to Santa Rosa

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Compare Chicago to Santa Rosa flight deals

Find the cheapest month or even day of the year to fly to Santa Rosa

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Flight deals from Chicago to Santa Rosa

Looking for a cheap last-minute deal or the best round-trip flight from Chicago to Santa Rosa? Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from Chicago to Santa Rosa

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Chicago to Santa Rosa flights are currently cheapest in July.

Chicago to Santa Rosa: Alternative routes

Compare routes from Chicago to Santa Rosa below. You may find an airport to fly into that's cheaper, faster, or easier than Santa Rosa.

Chicago to Santa Rosa: Flight information

The things to know before you go.
Cheapest flight found$314
Cheapest month to flyJuly

Finding cheap flights from Chicago to Santa Rosa: Frequently asked questions

The best price we found for a round-trip flight from Chicago to Santa Rosa is $314. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Chicago to Santa Rosa. But we found flights with one stop from $314.
There are no flights flying from Chicago to Santa Rosa, as of June 2025.
The cheapest month to fly from Chicago to Santa Rosa is usually June 2025.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Chicago to Santa Rosa Airport on Monday, July 14, 2025.
No airlines currently offer direct flights between Chicago and Santa Rosa Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Santa Rosa but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Santa Rosa is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to Santa Rosa is Spirit Airlines.

Traveling from Chicago to Sonoma County Airport (STS): what you need to know

  • Kick off your journey at one of Chicago's main airports, O'Hare International Airport (ORD) or Chicago Midway International Airport (MDW). Explore your options for booking a flight from Chicago to Sonoma County Airport (STS) departing from either of these.

  • Sonoma County Airport is located in Santa Rosa. The city operates in the UTC-7 timezone and is 2 hours behind Chicago.

  • Arrive at the airport on time so you don't miss your flight from Chicago to STS. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid the mad dash to your gate.

  • If you're getting away during a popular month like August, get to the terminal even earlier. It's wise to arrive up to four hours before an international flight and two hours ahead of domestic departures. Check-in and security lines will be longer during high seasons like Thanksgiving, Christmas and New Year.

Airports in Chicago

O'Hare International Airport (ORD)

Chicago Midway International Airport (MDW)

About Sonoma County Airport (STS)

Getting from Sonoma County Airport (STS) to central Santa Rosa

  • Sonoma County Airport to central Santa Rosa is around 14 minutes by car. It's approximately 13 kilometers away. See what options are available, such as cabs, car rentals or ride-sharing.

  • It'll take around 36 minutes to get there by public transport.

How to find the cheapest flights from Chicago to Sonoma County Airport (STS)

  • For a one-way ticket from Chicago to Sonoma County Airport, $145 is the cheapest price. You can also book a return trip from just $314. These are currently the lowest fares and may vary based on availability.

  • It's usually best to book in advance if you're hoping to get cheap tickets from Chicago to STS. That's because airlines adjust prices based on demand, which tends to rise closer to the date of departure.

  • If you're flexible with your trip dates, check out the 'Whole month' tool. It'll find the lowest price across the month when searching for your ticket from Chicago to Sonoma County Airport.

  • Sign into your online account or use the app to set up a Price Alert. We'll notify you straight away if there's a deal you won't want to miss. It's easy to do, and it'll save you from looking for a cheap ticket from Chicago to STS every day.

  • Use the filters to tailor your flights from Chicago to Sonoma County Airport. Enter your ideal departure and arrival times, number of stops and airlines. You can also sort your results by 'Cheapest' to get the best deals.

The best time to fly from Chicago to Sonoma County Airport (STS)

  • October is the busiest month for flights from Chicago to Sonoma County Airport. To steer clear of the crowds, visit Santa Rosa in May when things are quieter.

  • Think about the type of weather that'll suit your plans for Santa Rosa. August is known as the warmest month. Book your flights from Chicago to STS during then and you can expect temperatures of between 11ºC and 29ºC.

  • February sees average temperatures of between 2ºC and 19ºC. Search for cheap flights from Chicago to Sonoma County Airport around that time if you like cooler conditions.

More about Santa Rosa

  • When it comes to looking for somewhere to lay your head, you'll find the top stays in Santa Rosa right here. Check out these hotels as soon as you've booked your flight from Chicago to Sonoma County Airport:

  • Safari West and Annadel State Park are a couple of popular attractions to put on your Santa Rosa itinerary. Keep the adventure rolling by checking out Pacific Coast Air Museum.

Complete your Santa Rosa trip with a car rental

  • Once you've locked in your hotel and cheap flight from Chicago to Sonoma County Airport, next up is choosing one of our car rentals in Santa Rosa. Browse the exclusive deals and instantly compare options on price, pick-up convenience, fuel policies, and more.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.