$350+ Cheap flights from North America to Sidney, MT (SDY)
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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — SDY
Apr 5 — Apr 121
1 adult, Economy
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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
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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 North America to Sidney
Keep the following information in mind while searching for North America to Sidney flight deals. Data was last updated March 31, 2025.
Round-trip from | $562 (United) |
|---|---|
One-way from | $350 (United) |
Find flight deals from North America to Sidney
Cheapest flights from North America to SidneyExplore 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 March 31, 2025.
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 March 31, 2025.
This Expedia deal was found by Cheapflights users on 3/29. 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 11/17:00 amLAX - SDY
2 stops8h 43mMultiple Airlines
Sat 11/159:45 amSDY - LAX
2 stops9h 31mMultiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$475
This United 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2911:55 amBOS - SDY
2 stops26h 32mMultiple Airlines
Tue 5/612:52 pmSDY - BOS
2 stops29h 03mMultiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$562
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/307:00 amIAD - SDY
2 stops27h 57mMultiple Airlines
Sun 9/72:42 pmSDY - IAD
2 stops14h 50mMultiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$604
This United deal was found by Cheapflights users on 3/29. 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.
Sat 4/267:55 pmHNL - SDY
2 stops33h 02mMultiple Airlines
Sat 5/35:13 pmSDY - HNL
2 stops26h 07mMultiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$855
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 March 31, 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
BostonSidney
BOS - SDY
BOSSDY
Boston Logan Intl
Tue 4/29
11:55 am-12:27 pm
2 stops26h 32m
Sidney Richland Municipal
Tue 5/6
12:52 pm-7:55 pm
2 stops29h 03m
$562
Washington, D.C.Sidney
IAD - SDY
IADSDY
Washington, D.C. Dulles Intl
Sat 8/30
7:00 am-8:57 am
2 stops27h 57m
Sidney Richland Municipal
Sun 9/7
2:42 pm-7:32 am
2 stops14h 50m
$604
Los AngelesSidney
LAX - SDY
LAXSDY
Los Angeles
Sat 6/7
10:52 am-7:38 pm
2 stops7h 46m
Sidney Richland Municipal
Sun 6/15
2:42 pm-11:43 am
2 stops22h 01m
$606
HonoluluSidney
HNL - SDY
HNLSDY
Honolulu
Sat 4/26
7:55 pm-8:57 am
2 stops33h 02m
Sidney Richland Municipal
Sat 5/3
5:13 pm-3:20 pm
2 stops26h 07m
$855
HonoluluSidney
HNL - SDY
HNLSDY
Honolulu
Sun 5/11
9:45 pm-4:48 pm
2 stops15h 03m
$350
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
Rainfall in Sidney by month
Plan your trip to Sidney by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Sidney, Montana ranges from 0.0 - 2.8 inches per month. June is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Sidney, Montana when rainfall is around 0.0 in.
Temperature in Sidney by month
Plan your trip to Sidney by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Sidney, Montana, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 10.4 F).