$99+ Cheap flights from Chicago (CHI) to Sonoma, CA
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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Chicago to Sonoma with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Chicago to Sonoma are usually found in September or April, booked 83 days in advance, depart on a Wednesday or Thursday and return on a Wednesday
Cheap flight deals from Chicago to Sonoma
Keep the following information in mind while searching for Chicago to Sonoma flight deals. Data was last updated April 1, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $207 (Southwest) |
One-way from | $99 (Southwest) |
Popular in | December |
Cheapest in | September |
Average price | $287 |
Find flight deals from Chicago to Sonoma
Cheapest flights from Chicago to SonomaExplore the most affordable flight options available from Chicago to Sonoma. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2025.
Explore the most affordable flight options available from Chicago to Sonoma. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2025.
This Southwest deal was found by Cheapflights users on 3/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Alaska Airlines deal was found by Cheapflights users on 3/31. 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.
This American Airlines deal was found by Cheapflights users on 3/31. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Southwest deal was found by Cheapflights users on 3/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Expedia deal was found by Cheapflights users on 3/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Vliegwinkel deal was found by Cheapflights users on 3/31. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 3/31. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Trip.com deal was found by Cheapflights users on 3/31. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Flightnetwork deal was found by Cheapflights users on 3/31. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 3/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 3/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 3/31. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from Chicago to Sonoma 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 April 1, 2025.
Use the filters below to find and compare flights from Chicago to Sonoma that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
ChicagoSan Francisco
MDW - SFO
MDWSFO
Chicago Midway
Sat 4/19
12:40 pm-5:00 pm
1 stop6h 20m
San Francisco
Sat 4/26
7:20 am-4:50 pm
1 stop7h 30m
ChicagoSan Francisco
ORD - SFO
ORDSFO
Chicago O'Hare Intl
Wed 4/23
6:58 pm-9:57 pm
Nonstop4h 59m
San Francisco
Mon 5/5
11:48 am-6:20 pm
Nonstop4h 32m
ChicagoSan Francisco
ORD - SFO
ORDSFO
Chicago O'Hare Intl
Thu 9/18
6:35 pm-9:29 pm
Nonstop4h 54m
San Francisco
Tue 9/23
6:10 am-12:32 pm
Nonstop4h 22m
ChicagoSan Francisco
ORD - SFO
ORDSFO
Chicago O'Hare Intl
Fri 5/30
6:55 pm-11:20 pm
1 stop6h 25m
San Francisco
Sat 6/7
6:25 am-5:55 pm
1 stop9h 30m
ChicagoSan Francisco
ORD - SFO
ORDSFO
Chicago O'Hare Intl
Sat 4/19
7:16 pm-10:15 pm
Nonstop4h 59m
San Francisco
Sun 4/20
12:08 am-11:17 am
1 stop9h 09m
ChicagoSan Francisco
ORD - SFO
ORDSFO
Chicago O'Hare Intl
Sat 4/19
7:16 pm-10:15 pm
Nonstop4h 59m
San Francisco
Sat 4/26
12:43 pm-7:10 pm
Nonstop4h 27m
ChicagoSan Francisco
ORD - SFO
ORDSFO
Chicago O'Hare Intl
Sun 4/20
6:30 am-9:20 am
Nonstop4h 50m
San Francisco
Thu 5/8
4:30 pm-12:29 am
1 stop5h 59m
ChicagoSan Francisco
ORD - SFO
ORDSFO
Chicago O'Hare Intl
Mon 4/28
5:24 pm-12:33 am
1 stop9h 09m
San Francisco
Mon 5/5
6:35 am-11:41 pm
1 stop15h 06m
ChicagoSan Francisco
MDW - SFO
MDWSFO
Chicago Midway
Wed 5/7
2:12 pm-10:22 pm
1 stop10h 10m
San Francisco
Tue 5/13
11:50 pm-11:26 am
1 stop9h 36m
ChicagoSan Francisco
MDW - SFO
MDWSFO
Chicago Midway
Sat 4/19
3:02 pm-8:14 pm
1 stop7h 12m
San Francisco
Sat 5/10
11:59 pm-9:40 am
1 stop7h 41m
Best time to book a flight from Chicago to Sonoma
Have a flexible travel schedule? Discover the best time to fly to Sonoma from Chicago with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Chicago to Sonoma
How far ahead should I book a flight from Chicago to Sonoma?
Use this chart to determine the optimal time to book a round-trip flight from Chicago to Sonoma. Price data was last updated on March 28, 2025.
The best time to book flights from Chicago to Sonoma is 83 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Chicago to Sonoma?
Currently, January is the cheapest month in which you can book a flight from Chicago to Sonoma (average of $276). Flying from Chicago to Sonoma in June is currently the most expensive (average of $393). 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 CHI to SN9?
Find hourly flight availability from Chicago to Sonoma. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 1, 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chicago to Sonoma as you normally would.
What is the cheapest day to fly from Chicago to Sonoma?
Use this chart to determine the cheapest time to fly round-trip from Chicago to Sonoma. Price data was last updated on December 16, 2024.
Travelers seeking maximum savings on their Chicago to Sonoma flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Chicago to Sonoma
Explore weekly flight availability from Chicago to Sonoma. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 1, 2025.
The most flights from CHI to SN9 are scheduled on a Monday (72 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (34 on average).
Rainfall in Sonoma by month
Plan your trip to Sonoma by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Sonoma ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit Sonoma when rainfall is around 0.0 in.
Temperature in Sonoma by month
Plan your trip to Sonoma by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Sonoma, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).
Reviews of airlines servicing Sonoma
Get insights into the airlines that provide service to Sonoma. 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 Sonoma. Reviews last updated April 1, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from Chicago to Sonoma by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
Overall
Boarding
Entertainment
Crew
Food
Reviews
Seleste,Dec 2024
FAT - SAN
Comfort
Overall
Boarding
Entertainment
Crew
Food
Reviews
Seleste,Dec 2024
FAT - SAN
Comfort
Overall
Boarding
Entertainment
Crew
Food
Reviews
Seleste,Dec 2024
FAT - SAN
Comfort
Overall
Boarding
Entertainment
Crew
Food
Reviews
Seleste,Dec 2024
FAT - SAN
Comfort
Overall
Boarding
Entertainment
Crew
Food
Reviews
Seleste,Dec 2024
FAT - SAN
Comfort
Overall
Boarding
Entertainment
Crew
Food
Reviews
Seleste,Dec 2024
FAT - SAN
Related info for your journey
Find useful and relevant information for your journey from Chicago to Sonoma. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Chicago to Sonoma
See prices for flight routes from nearby airports that may be better suited for you.
Top 8 airlines flying from Chicago to Sonoma
Discover the top 8 airlines that operate flights from Chicago to Sonoma. 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 April 1, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$78 | Average$219 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$128 | Average$444 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$129 | Average$241 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$141 | Average$397 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$144 | Average$303 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$163 | Average$325 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$197 | Average$436 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$242 | Average$426 | FlexibilityNo cancel fee | On-time63% |