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O'Hare Intl

$163+ Cheap flights from Santa Rosa (STS) to O'Hare Intl (ORD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/30. Fares are subject to change and may not be available on all flights or dates of travel.
STS — ORD
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Santa Rosa to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Santa Rosa (STS) to O'Hare Intl (ORD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 15, 2025.

Round-trip from

$277
(Alaska Airlines)

One-way from

$163
(KAYAK)

Popular in

January

Cheapest in

November

Average price

$406
From Santa Rosa Sonoma County to Chicago O'Hare Intl
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One-way flight from Santa Rosa Sonoma County to Chicago O'Hare Intl
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Highest demand for flights based on searches. 5% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 9% potential price decrease ($45 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Santa Rosa to O'Hare Intl

Cheapest flights from Santa Rosa to O'Hare Intl
Explore the most affordable flight options available from Santa Rosa to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Alaska Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/58:00 amSTS - ORD
1 stop8h 54mAlaska Airlines
Tue 12/93:05 pmORD - STS
1 stop10h 03mAlaska Airlines
Deal found 9/14$277
This Alaska Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/219:43 amSTS - ORD
2 stops12h 16mAlaska Airlines
Tue 10/289:20 amORD - STS
1 stop8h 42mAlaska Airlines
Deal found 9/14$283
This Alaska Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/219:43 amSTS - ORD
2 stops12h 16mAlaska Airlines
Wed 10/299:20 amORD - STS
2 stops14h 26mAlaska Airlines
Deal found 9/14$289
This Alaska Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/79:43 amSTS - ORD
2 stops12h 16mAlaska Airlines
Wed 10/153:50 pmORD - STS
1 stop9h 26mAlaska Airlines
Deal found 9/14$293
This Alaska Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/147:53 pmSTS - ORD
1 stop26h 06mAlaska Airlines
Tue 11/119:20 amORD - STS
1 stop8h 42mAlaska Airlines
Deal found 9/13$297
This Alaska Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/256:25 amSTS - ORD
1 stop15h 34mAlaska Airlines
Tue 10/289:20 amORD - STS
2 stops14h 26mAlaska Airlines
Deal found 9/14$304
This Alaska Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/86:25 amSTS - ORD
1 stop10h 34mAlaska Airlines
Sat 10/113:50 pmORD - STS
1 stop9h 26mAlaska Airlines
Deal found 9/14$308
This Alaska Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/67:50 amSTS - ORD
2 stops14h 09mAlaska Airlines
Thu 12/113:05 pmORD - STS
1 stop10h 03mAlaska Airlines
Deal found 9/14$311
This Alaska Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/116:25 amSTS - ORD
1 stop15h 34mAlaska Airlines
Sat 11/88:00 amORD - STS
2 stops13h 27mAlaska Airlines
Deal found 9/13$315
This Hawaiian Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/118:00 amSTS - ORD
1 stop8h 54mHawaiian Airlines
Sun 12/146:00 amORD - STS
1 stop9h 29mHawaiian Airlines
Deal found 9/12$316
This Alaska Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/28:00 amSTS - ORD
1 stop28h 09mAlaska Airlines
Tue 12/93:05 pmORD - STS
1 stop10h 03mAlaska Airlines
Deal found 9/14$317
This Alaska Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:46 pmSTS - ORD
1 stop16h 08mAlaska Airlines
Wed 11/192:54 pmORD - STS
1 stop11h 03mAlaska Airlines
Deal found 9/14$318

Cheapflights Fare Finder

 
Customize your flight search to find flights from Santa Rosa to O'Hare Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from Santa Rosa to Chicago O'Hare Intl Airport that are best for you.

Fly from

Santa Rosa

Fly to

O'Hare Intl

Route

Depart

Return

Price

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 10/28

2:09 pm-11:59 pm

1 stop7h 50m

Chicago O'Hare Intl

Sat 11/15

9:20 am-9:46 pm

2 stops14h 26m

$283

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 10/21

9:43 am-2:50 pm

2 stops27h 07m

Chicago O'Hare Intl

Wed 11/5

9:20 am-4:02 pm

1 stop8h 42m

$283

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 10/21

9:43 am-11:59 pm

2 stops12h 16m

Chicago O'Hare Intl

Tue 10/28

9:20 am-9:46 pm

2 stops14h 26m

$289

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Wed 10/15

6:25 am-11:59 pm

1 stop15h 34m

Chicago O'Hare Intl

Wed 10/22

3:50 pm-11:16 pm

1 stop9h 26m

$297

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Wed 11/12

6:49 am-11:59 pm

1 stop15h 10m

Chicago O'Hare Intl

Tue 11/18

9:20 am-4:02 pm

1 stop8h 42m

$297

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Sat 11/15

6:49 am-7:55 pm

1 stop11h 06m

Chicago O'Hare Intl

Tue 11/18

9:20 am-4:02 pm

1 stop8h 42m

$297

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Mon 11/10

7:46 pm-1:54 pm

1 stop16h 08m

Chicago O'Hare Intl

Thu 11/13

9:20 am-4:02 pm

1 stop8h 42m

$297

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 11/11

7:46 pm-7:55 pm

1 stop22h 09m

Chicago O'Hare Intl

Sat 11/15

9:20 am-9:46 pm

2 stops14h 26m

$304

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Wed 11/12

6:49 am-7:55 pm

1 stop11h 06m

Chicago O'Hare Intl

Sat 11/15

9:20 am-9:46 pm

2 stops14h 26m

$304

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Mon 11/10

7:46 pm-1:54 pm

1 stop16h 08m

Chicago O'Hare Intl

Sat 11/15

9:20 am-9:46 pm

2 stops14h 26m

$304

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 18 results
1
2

Best time to book a flight from Santa Rosa to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Santa Rosa with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Santa Rosa to Chicago O'Hare Intl Airport

What is the cheapest month to book a flight from Santa Rosa to Chicago O'Hare Intl Airport?

Currently, August is the cheapest month in which you can book a flight from Santa Rosa to Chicago O'Hare Intl Airport (average of $245). Flying from Santa Rosa to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STS to ORD?

Find hourly flight availability from Santa Rosa to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 2% on flights from Santa Rosa to Chicago O'Hare Intl Airport by exploring options for tickets in the afternoon.

How much does it cost to fly round-trip from Santa Rosa to Chicago O'Hare Intl Airport?

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to O'Hare Intl. Reviews last updated September 15, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines and American Airlines from Santa Rosa to Chicago O'Hare Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Crew

8.5

Overall

8.0

Comfort

7.8

Food

7.1

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Crew

8.5

Overall

8.0

Comfort

7.8

Food

7.1

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Crew

8.5

Overall

8.0

Comfort

7.8

Food

7.1

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

Find useful and relevant information for your journey from Santa Rosa to O'Hare Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Santa Rosa to Chicago O'Hare Intl?

    Located just 7.2 mi from the city center, Santa Rosa Sonoma County is the airport most travelers will use when flying to Chicago O'Hare Intl from Santa Rosa. Booking flights from Sonoma County (STS) to Chicago O'Hare Intl should be relatively easy as there are 0 daily outbound flights to Chicago O'Hare Intl from 2 different airlines.

  • How long is the flight from Santa Rosa to Chicago O'Hare Intl Airport?

    There are many flights that can get you from Santa Rosa to Chicago O'Hare Intl Airport in 7h 50m. Fly via Alaska Airlines to get the fastest option. The distance from Santa Rosa to Chicago O'Hare Intl Airport is about 1842 mi.

  • What are the cheapest airlines flying from Santa Rosa to Chicago O'Hare Intl Airport round-trip?

    According to our current data, Alaska Airlines ($308), and American Airlines ($316) offers the cheapest pricing from Santa Rosa to Chicago O'Hare Intl Airport. These flights start at 42% lower than the current average price 3 months from now.

  • Can I find deals for flights from Santa Rosa to O'Hare Intl that include hotel bookings?

    Yes. In addition to deals on Santa Rosa to O'Hare Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Santa Rosa to O'Hare Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Santa Rosa to O'Hare Intl.

  • Can I find deals for business class flights from Santa Rosa to O'Hare Intl?

    Yes. Cheapflights offers flight deals from Santa Rosa to O'Hare Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Santa Rosa to Chicago O'Hare Intl Airport?

    Currently, August is the cheapest month in which you can book a flight from Santa Rosa to Chicago O'Hare Intl Airport (average of $245). Flying from Santa Rosa to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Schaumburg
Rosemont
Skokie
Gurnee
Hoffman Estates
Des Plaines
Elgin
Arlington Heights
Beloit
Racine
Rockford
Orland Park
Oak Brook
Downers Grove
Naperville
Elk Grove Village
Evanston
Merrillville
Bridgeview
Warrenville

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Alternative routes for Santa Rosa to O'Hare Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Santa Rosa to O'Hare Intl

Discover the top 2 airlines that operate flights from Santa Rosa to O'Hare Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$308Average$542FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$316Average$653FlexibilityNo cancel feeOn-time71%

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