371 € Cheap Flights from Chicago O'Hare International to Santa Rosa

Compare Chicago O'Hare International 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 O'Hare International to Santa Rosa

Looking for a cheap last-minute deal or the best return flight from Chicago O'Hare International Airport to Santa Rosa Airport? If you want to travel next month, return fares start from 457 €. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Chicago O'Hare International to Santa Rosa

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

Chicago O'Hare International to Santa Rosa: Alternative routes

Compare routes from Chicago O'Hare International 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 found371 €
Cheapest month to flyMay

Finding cheap flights from Chicago O'Hare International to Santa Rosa: Frequently asked questions

The best price we found for a return flight from Chicago O'Hare International to Santa Rosa is 371 €. 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 O'Hare International to Santa Rosa. But we found flights with one or more stops from 371 €.
As of May 2026, there are no flights flying from Chicago O'Hare International to Santa Rosa.
The cheapest month to fly from Chicago O'Hare International to Santa Rosa is usually May.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Chicago O'Hare International Airport to Santa Rosa Airport on Friday, 29 May 2026.
No airlines currently offer direct flights between Chicago O'Hare International Airport 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.
Currently, Alaska Airlines offers the cheapest flight tickets to Santa Rosa.

Travelling from O'Hare International Airport (ORD) to Sonoma County Airport (STS): what you need to know

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are golden rules for hassle-free flying. Show up at the airport on time to catch your ORD to STS flight.

  • You can expect bigger queues in popular months like August. Arriving up to four hours in advance for international flights and two hours for a domestic departure is a wise move.

  • Explore another city along the way or simply break up your flight with a stopover. Just uncheck 'Direct flights only' to see your options when searching for tickets from O'Hare International Airport to Sonoma County Airport. Many passengers pass through Phoenix Sky Harbour International Airport on this route.

How to find the cheapest flights from O'Hare International Airport (ORD) to Sonoma County Airport (STS)

  • Right now, 140 € is the lowest price we've found for a one-way O'Hare International Airport to Sonoma County Airport flight. The best price for a return plane ticket is 371 €. Keep in mind that fares could change due to demand at the time of booking.

  • To pick up cheap tickets from ORD to STS, book early. Airlines typically offer their best fares when flights are first released.

  • Getting cheap flights from O'Hare International Airport to Sonoma County Airport is easier if you can be flexible with your travel dates. Use the 'Whole month' search function to see the lowest prices across the month and bag a great deal.

  • You don't need to check back in every day to see if fares have gone down when you set up a Price Alert. We'll notify you the moment a special offer becomes available on cheap flights from ORD to STS.

  • Secure the ideal flight for you with the help of the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from O'Hare International Airport to Sonoma County Airport, use the 'Sort by' tool. You can also filter by arrival and departure times, airline, and number of stops.

Handy information about O'Hare International Airport (ORD)

  • ORD is located at 10000 West O'Hare.

  • When it comes to O'Hare International Airport's on-time performance, data shows 74.85% of flights arrive within the scheduled timeframe.

  • O'Hare International Airport is around 40 kilometres from central Chicago. If you're driving, catching a cab or ride-sharing from the centre, it'll take 35 minutes or so to arrive, depending on the traffic.

  • Taking public transport? Expect a journey time of around 55 minutes.

  • Get your break off to a hassle-free start by staying near ORD. Whether you've booked an early flight from O'Hare International Airport to Sonoma County Airport or want to avoid feeling rushed, these stays are perfect:

Arriving at Sonoma County Airport (STS)

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

  • STS is located at 2200 Airport Boulevard.

  • Sonoma County Airport to central Santa Rosa has a drive time of around 15 minutes. It's approximately 13 kilometres away.

  • Getting to the centre by public transport will take you roughly 35 minutes.

When to fly to Sonoma County Airport (STS)

  • October is the most popular month for flights from O'Hare International Airport to Sonoma County Airport. To steer clear of the crowds, go to Santa Rosa in May.

  • The warmest month in Santa Rosa is August, with temperatures ranging between 11ºC (52ºF) and 29ºC (84ºF). Lock in your flights from O'Hare International Airport to Sonoma County Airport in this month if this is the type of weather you like.

  • February has average temperatures of between 2ºC (36ºF) and 19ºC (66ºF). Look for cheap tickets from ORD to STS sometime then if you want to travel in cooler conditions.

Explore more of United States

  • Santa Rosa has plenty to offer, but there are so many other corners of United States you'll want to see. Around 145 kilometres south-east of Santa Rosa, a trip to San Jose will keep your itinerary busy. Start with leading sights like Winchester Mystery House, Rosicrucian Egyptian Museum and San Jose Museum of Art.

  • San Francisco is another must-experience destination in United States and is around 80 kilometres south of Santa Rosa. No trip is complete without visiting Golden Gate Bridge, Alcatraz Island and Lombard Street.

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