$468+ Cheap flights from San Francisco Bay Area 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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SDY
Nov 9 — Nov 161
1 adult, Economy
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Cheapest flights from San Francisco Bay Area to SidneyExplore the most affordable flight options available from San Francisco Bay Area to Sidney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 10, 2025.
Explore the most affordable flight options available from San Francisco Bay Area to Sidney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 10, 2025.
This Expedia deal was found by Cheapflights users on 10/9. 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 10/245:59 pmSJC - SDY
2 stops14h 08mMultiple Airlines
Tue 10/289:32 amSDY - SJC
2 stops11h 16mMultiple Airlines
Deal found 10/9![Multiple Airlines logo]()
$716
Cheap flight deals from San Francisco Bay Area to Sidney
Keep the following information in mind while searching for San Francisco Bay Area to Sidney flight deals. Data was last updated October 10, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $716 (Expedia) |
One-way from | $468 (United) |
Cheapflights Fare Finder
Customize your flight search to find flights from San Francisco Bay Area 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 October 10, 2025.
Use the filters below to find and compare flights from San Francisco Bay Area to Sidney that are best for you.
Fly from
San Francisco Bay Area
Fly to
Sidney
Route
Depart
Return
Price
San JoseSidney
SJC - SDY
SJCSDY
San Jose
Fri 10/24
5:59 pm-9:07 am
2 stops14h 08m
Sidney Richland Municipal
Tue 10/28
9:32 am-7:48 pm
2 stops11h 16m
$716
San JoseSidney
SJC - SDY
SJCSDY
San Jose
Thu 10/16
8:00 am-7:51 pm
2 stops10h 51m
$479
Best time to book a flight from San Francisco Bay Area to Sidney
Have a flexible travel schedule? Discover the best time to fly to Sidney from San Francisco Bay Area with our price prediction graph.
Estimated round-trip price
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Cheapflights Insights
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