Title: Cheap Flights from Chicago to Santa Rosa (ORD to STS) - Expedia.co.uk ![](https://images.trvl-media.com/place/3288/93d7ff98-0178-43a1-b262-1a96bbba25d1.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/3288/93d7ff98-0178-43a1-b262-1a96bbba25d1.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from Chicago (ORD) to Santa Rosa (STS) - [Return](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Chicago O'Hare International Airport (ORD) to Santa Rosa, CA (STS-Sonoma County) - ![Alaska Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg) Alaska Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:ORD,to:STS,departure:02/01/2026TANYT&leg2=from:STS,to:ORD,departure:09/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:ORD,to:STS,departure:02/01/2026TANYT&leg2=from:STS,to:ORD,departure:09/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![Hawaiian Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_HA.svg) Hawaiian Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:ORD,to:STS,departure:02/01/2026TANYT&leg2=from:STS,to:ORD,departure:09/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"HA"}}]) - ![Southwest Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_WN.svg) Southwest Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:ORD,to:STS,departure:02/01/2026TANYT&leg2=from:STS,to:ORD,departure:09/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WN"}}]) - ![notification illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* - ![deals illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 25% on select hotels after you book a flight\* - ![trophy illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.co.uk/login) ## Find the cheapest month to fly from Chicago (ORD) to Santa Rosa (STS) ### February is typically the cheapest month to fly From £195 - £478 per traveller. __Flight from Chicago to Santa Rosa route information__ | Origin airport | O'Hare Intl. | | ------------------- | ------------- | | Destination airport | Sonoma County | | Distance | 2949 km | ## Compare flights from Chicago to Santa Rosa easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from Chicago to Santa Rosa. Operating between them flights per day, airlines cover the route. And fly direct, getting you to Sonoma County in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from O'Hare Intl. to Sonoma County. To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. Grab a great deal on your flight from O'Hare Intl. (ORD) to Sonoma County (STS) The easiest way to view the best deals on flights from Chicago to Santa Rosa today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from O'Hare Intl. to Sonoma County start at just and range up to . To find an even better deal, try - being flexible on your dates – midweek flights can be cheaper - looking for other airports near Chicago and Santa Rosa - booking your flight during , the cheapest month on this route - varying your flight times – early morning and late at night are sometimes cheaper Why you should book your Chicago to Santa Rosa flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from O'Hare Intl. to Sonoma County for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you. Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight. ## Frequently asked questions ### How much is a flight from O'Hare Intl. Airport (ORD) to Sonoma County Airport (STS)? ### Do I need to pay a cancellation fee if I cancel my flight from O'Hare Airport to Sonoma County Airport (STS)? ### How do I find cheap flights from O'Hare Intl. Airport (ORD) to Sonoma County Airport that have flexible change policies? ### How many hours is the flight from ORD to STS? ### How far is the flight from O'Hare Intl. Airport (ORD) to Sonoma County Airport (STS)? ### Which airlines fly direct from O'Hare Intl. Airport (ORD) to Sonoma County Airport? ### Are O'Hare Intl. Airport (ORD) to STS flight tickets cheaper when they're purchased at the last minute? ## Explore a world of travel with Expedia - Flights - [Flights from Málaga (AGP) to Napa (APC) ](https://www.expedia.co.uk/lp/flights/agp/apc/malaga-to-napa) - [Flights from Ashland (AHM) to Napa (APC) ](https://www.expedia.co.uk/lp/flights/ahm/apc/ashland-to-napa) - [Flights from Albany (ALB) to Napa (APC) ](https://www.expedia.co.uk/lp/flights/alb/apc/albany-to-napa) - [Flights from Austin (AUS) to Napa (APC) ](https://www.expedia.co.uk/lp/flights/aus/apc/austin-to-napa) - [Flights from The Valley (AXA) to Napa (APC) ](https://www.expedia.co.uk/lp/flights/axa/apc/the-valley-to-napa) - [Flights from Barcelona (BCN) to Napa (APC) ](https://www.expedia.co.uk/lp/flights/bcn/apc/barcelona-to-napa) - [Flights from Hartford (BDL) to Napa (APC) ](https://www.expedia.co.uk/lp/flights/bdl/apc/hartford-to-napa) - [Flights from Benton Harbor (BEH) to Napa (APC) ](https://www.expedia.co.uk/lp/flights/beh/apc/benton-harbor-to-napa) - 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