$382+ Cheap flights from San Francisco to Sidney, MT (SFO - 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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SDY
Apr 2 — Apr 91
1 adult, Economy
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Find cheap flights from San Francisco 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 San Francisco to Sidney
Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Sidney (SDY). 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 March 28, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $382 (United) |
Find flight deals from San Francisco to Sidney
Cheapest flights from San Francisco to SidneyExplore the most affordable flight options available from San Francisco to Sidney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.
Explore the most affordable flight options available from San Francisco to Sidney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.
This United deal was found by Cheapflights users on 3/27. 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.
Fri 5/96:30 amSFO - SDY
2 stops9h 18mMultiple Airlines
Sun 5/119:22 amSDY - SFO
2 stops25h 14mMultiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$382
Cheapflights Fare Finder
Customize your flight search to find flights from San Francisco 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 28, 2025.
Use the filters below to find and compare flights from San Francisco to Sidney that are best for you.
Fly from
San Francisco
Fly to
Sidney
Route
Depart
Return
Price
San FranciscoSidney
SFO - SDY
SFOSDY
San Francisco
Fri 5/9
6:30 am-4:48 pm
2 stops9h 18m
Sidney Richland Municipal
Sun 5/11
9:22 am-9:36 am
2 stops25h 14m
$382
Compare providers for flights from San Francisco to Sidney
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Francisco to Sidney in March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on San Francisco-Sidney, Montana flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-Sidney, Montana flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Francisco-Sidney, Montana flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Francisco-Sidney, Montana flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Francisco-Sidney, Montana flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from San Francisco to Sidney
Have a flexible travel schedule? Discover the best time to fly to Sidney from San Francisco 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 San Francisco 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).