HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Sidney

$351+ Cheap flights from California to Sidney, MT (SDY)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/14. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — SDY
Mar 10 — Mar 171
Tue 3/10
Tue 3/17
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from California to Sidney 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.

Cheap flight deals from California to Sidney

Cheapest flights from California to Sidney
Explore the most affordable flight options available from California to Sidney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 8, 2026.

This eDestinos deal was found by Cheapflights users on 2/7. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/147:00 am
LAX
-
SDY
2 stops25h 10m
Multiple Airlines
Tue 3/315:10 pm
SDY
-
LAX
2 stops24h 56m
Multiple Airlines
Deal found 2/7$351
This Expedia deal was found by Cheapflights users on 2/6. 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.
Wed 9/911:55 am
LAX
-
SDY
2 stops20h 12m
Multiple Airlines
Wed 9/167:35 am
SDY
-
LAX
2 stops14h 12m
Multiple Airlines
Deal found 2/6$435
This Expedia deal was found by Cheapflights users on 2/6. 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.
Sat 9/54:00 pm
ONT
-
SDY
2 stops16h 07m
Multiple Airlines
Wed 9/162:42 pm
SDY
-
ONT
2 stops21h 27m
Multiple Airlines
Deal found 2/6$479
This Expedia deal was found by Cheapflights users on 2/6. 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.
Sat 9/56:00 am
LAX
-
SDY
2 stops12h 51m
Multiple Airlines
Wed 9/169:32 am
SDY
-
LAX
2 stops10h 37m
Multiple Airlines
Deal found 2/6$485
This Expedia deal was found by Cheapflights users on 2/6. 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.
Sat 9/54:00 pm
ONT
-
SDY
2 stops16h 07m
Multiple Airlines
Sat 9/1912:52 pm
SDY
-
ONT
2 stops23h 17m
Multiple Airlines
Deal found 2/6$494
This Expedia deal was found by Cheapflights users on 2/6. 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.
Sat 9/57:00 am
LAX
-
SDY
2 stops8h 45m
Multiple Airlines
Sat 9/1912:52 pm
SDY
-
LAX
2 stops8h 19m
Multiple Airlines
Deal found 2/6$506
This Expedia deal was found by Cheapflights users on 2/6. 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.
Wed 9/94:00 pm
ONT
-
SDY
2 stops16h 07m
Multiple Airlines
Wed 9/1612:52 pm
SDY
-
ONT
2 stops12h 07m
Multiple Airlines
Deal found 2/6$537
This Expedia deal was found by Cheapflights users on 2/5. 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.
Fri 2/202:36 pm
SJC
-
SDY
2 stops17h 34m
Multiple Airlines
Tue 2/247:35 am
SDY
-
SJC
2 stops13h 25m
Multiple Airlines
Deal found 2/5$678

Find flight deals from California to Sidney

Keep the following information in mind while searching for California to Sidney flight deals. Data was last updated February 8, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$351
(eDestinos)
Provider with most accurate pricing for Los Angeles-Sidney Richland Municipal flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Sidney Richland Municipal flights.
Search Deals
From California to Sidney Richland Municipal
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from California to Sidney 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 February 8, 2026.
Use the filters below to find and compare flights from California to Sidney that are best for you.

Fly from

California

Fly to

Sidney

Route

Depart

Return

Price

Los AngelesSidney

LAX - SDY

LAXSDY

Los Angeles

Sat 3/14

7:00 am-9:10 am

2 stops25h 10m

Sidney Richland Municipal

Tue 3/31

5:10 pm-5:06 pm

2 stops24h 56m

$351

San JoseSidney

SJC - SDY

SJCSDY

San Jose

Fri 2/20

2:36 pm-9:10 am

2 stops17h 34m

Sidney Richland Municipal

Tue 2/24

7:35 am-8:00 pm

2 stops13h 25m

$678

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/7

Best time to book a flight from California to Sidney

Have a flexible travel schedule? Discover the best time to fly to Sidney from California 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 California to Sidney
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from California to Sidney. 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 into for flights to Sidney from California?

    Sidney Richland Municipal (SDY) is the airport you will fly into if you book a flight from California to Sidney. It is only a 1.8 mi journey from Richland Municipal (SDY) to Sidney’s city center.

  • What are the most popular routes from California to Sidney, Montana?

    Most travelers choose Reno - Sidney Richland Municipal, Los Angeles - Sidney Richland Municipal or San Jose - Sidney Richland Municipal when deciding on the best route from California to Sidney, Montana.

  • Can I find deals for flights from California to Sidney that include hotel bookings?

    Yes. In addition to deals on California to Sidney flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from California to Sidney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from California to Sidney.

  • Can I find deals for business class flights from California to Sidney?

    Yes. Cheapflights offers flight deals from California to Sidney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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 California to Sidney

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Bozeman flights
John F Kennedy Intl to Bozeman flights
Boston to Bozeman flights
O'Hare Intl to Bozeman flights
LaGuardia to Bozeman flights
Los Angeles to Bozeman flights
Minneapolis to Bozeman flights
San Francisco to Bozeman flights
Atlanta to Bozeman flights
Dallas/Fort Worth to Bozeman flights
Denver to Bozeman flights
O'Hare Intl to Kalispell flights
Seattle to Bozeman flights
Dallas/Fort Worth to Kalispell flights
Midway to Bozeman flights
Dulles Intl to Bozeman flights
O'Hare Intl to Missoula flights
Charlotte to Bozeman flights
Hobby to Bozeman flights
Hobby to Kalispell flights
Minneapolis to Kalispell flights
Philadelphia to Bozeman flights
Baltimore to Bozeman flights
Dallas/Fort Worth to Missoula flights
John F Kennedy Intl to Kalispell flights
Fort Lauderdale to Bozeman flights
Pittsburgh to Bozeman flights
Denver to Missoula flights
Dulles Intl to Kalispell flights
Ontario to Bozeman flights
Denver to Kalispell flights
George Bush Intcntl to Bozeman flights
Sky Harbor Intl to Bozeman flights
Newark to Kalispell flights
Reagan-National to Bozeman flights
San Diego to Bozeman flights
Tampa to Bozeman flights
Boston to Kalispell flights
Nashville to Bozeman flights
Seattle to Billings flights
San Francisco to Missoula flights
Orlando to Bozeman flights
Dulles Intl to Missoula flights
George Bush Intcntl to Kalispell flights
Santa Ana to Kalispell flights
Raleigh to Bozeman flights
John F Kennedy Intl to Missoula flights
Austin to Bozeman flights
Los Angeles to Kalispell flights
Detroit to Kalispell flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.