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$316+ Cheap flights from North America 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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — SDY
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
1 adult, Economy
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Cheap flight deals from North America to Sidney

Keep the following information in mind while searching for North America to Sidney flight deals. Data was last updated septiembre 16, 2025.

Round-trip from

$316
(United)
From North America to Sidney Richland Municipal
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Cheapest flights from North America to Sidney
Explore the most affordable flight options available from North America to Sidney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 16, 2025.

This United deal was found by Cheapflights users on 9/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/177:15 pmDEN - SDY
1 stop21h 30mMultiple Airlines
dom. 10/197:35 amSDY - DEN
1 stop12h 08mMultiple Airlines
Deal found 9/15$316
This Trip.com deal was found by Cheapflights users on 9/15. 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.
jue. 10/308:00 amSFO - SDY
2 stops10h 51mMultiple Airlines
jue. 11/62:42 pmSDY - SFO
2 stops10h 08mMultiple Airlines
Deal found 9/15$432
This SmartFares 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/287:00 amLAX - SDY
2 stops11h 51mMultiple Airlines
vie. 12/59:32 amSDY - LAX
2 stops11h 10mMultiple Airlines
Deal found 9/14$455
This Expedia deal was found by Cheapflights users on 9/15. 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.
mar. 9/303:06 pmONT - SDY
2 stops17h 01mMultiple Airlines
sáb. 10/49:32 amSDY - ONT
2 stops15h 31mMultiple Airlines
Deal found 9/15$517
This United 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/55:05 amONT - SDY
2 stops13h 46mMultiple Airlines
mar. 12/305:10 pmSDY - ONT
2 stops28h 57mMultiple Airlines
Deal found 9/14$533
This Travelocity 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/53:32 pmLAX - SDY
2 stops16h 35mMultiple Airlines
mar. 12/309:32 amSDY - LAX
2 stops11h 53mMultiple Airlines
Deal found 9/14$584
This United 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/281:33 pmONT - SDY
2 stops21h 54mMultiple Airlines
vie. 12/512:52 pmSDY - ONT
2 stops24h 40mMultiple Airlines
Deal found 9/14$608

Cheapflights Fare Finder

 
Customize your flight search to find flights from North America 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 septiembre 16, 2025.
Use the filters below to find and compare flights from North America to Sidney that are best for you.

Fly from

North America

Fly to

Sidney

Route

Depart

Return

Price

DenverSidney

DEN - SDY

DENSDY

Denver Intl

vie. 10/17

7:15 pm-4:45 pm

1 stop21h 30m

Sidney Richland Municipal

dom. 10/19

7:35 am-7:43 pm

1 stop12h 08m

$316

San FranciscoSidney

SFO - SDY

SFOSDY

San Francisco

jue. 10/30

8:00 am-7:51 pm

2 stops10h 51m

Sidney Richland Municipal

jue. 11/6

2:42 pm-11:50 pm

2 stops10h 08m

$432

Los AngelesSidney

LAX - SDY

LAXSDY

Los Angeles

mar. 10/28

7:00 am-7:51 pm

2 stops11h 51m

Sidney Richland Municipal

vie. 12/5

9:32 am-7:42 pm

2 stops11h 10m

$455

OntarioSidney

ONT - SDY

ONTSDY

Ontario

mar. 9/30

3:06 pm-9:07 am

2 stops17h 01m

Sidney Richland Municipal

sáb. 10/4

9:32 am-12:03 am

2 stops15h 31m

$517

OntarioSidney

ONT - SDY

ONTSDY

Ontario

vie. 12/5

5:05 am-7:51 pm

2 stops13h 46m

Sidney Richland Municipal

mar. 12/30

5:10 pm-9:07 pm

2 stops28h 57m

$533

Los AngelesSidney

LAX - SDY

LAXSDY

Los Angeles

vie. 12/5

3:32 pm-9:07 am

2 stops16h 35m

Sidney Richland Municipal

mar. 12/30

9:32 am-8:25 pm

2 stops11h 53m

$584

OntarioSidney

ONT - SDY

ONTSDY

Ontario

mar. 10/28

1:33 pm-12:27 pm

2 stops21h 54m

Sidney Richland Municipal

vie. 12/5

12:52 pm-12:32 pm

2 stops24h 40m

$608

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Best time to book a flight from North America to Sidney

Have a flexible travel schedule? Discover the best time to fly to Sidney from North America 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 North America 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 North America 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 North America?

    Sidney Richland Municipal (SDY), located 1.8 mi from the city center, is the airport you fly into when you book flights from North America to Sidney.

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

    Most travelers choose Denver Intl - Sidney Richland Municipal, Los Angeles - Sidney Richland Municipal or Ontario - Sidney Richland Municipal when deciding on the best route from North America to Sidney, Montana.

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

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

  • How can I find direct flights from North America to Sidney?

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

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

    Yes. Cheapflights offers flight deals from North America 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

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