$881+ Cheap flights from Denver to Sidney, MT (DEN - 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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SDY
Jan 30 — Feb 61
1 adult, Economy
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Best flights from Denver to SidneyDiscover carefully curated flight deals from Denver to Sidney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 31, 2025.
Discover carefully curated flight deals from Denver to Sidney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 31, 2025.
This Expedia deal was found by Cheapflights users on 12/29. 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.
Tue 1/137:00 amDEN - SDY
2 stops12h 51mMultiple Airlines
Sat 1/177:35 amSDY - DEN
2 stops16h 00mMultiple Airlines
Deal found 12/29![Multiple Airlines logo]()
$881
Find flight deals from Denver to Sidney
Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) 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 December 31, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 1 star |
Round-trip from | $881 (Expedia) |
Cheapflights Fare Finder
Customize your flight search to find flights from Denver 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 December 31, 2025.
Use the filters below to find and compare flights from Denver to Sidney that are best for you.
Fly from
Denver
Fly to
Sidney
Route
Depart
Return
Price
DenverSidney
DEN - SDY
DENSDY
Denver Intl
Tue 1/13
7:00 am-7:51 pm
2 stops12h 51m
Sidney Richland Municipal
Sat 1/17
7:35 am-11:35 pm
2 stops16h 00m
$881
- Most accurate provider: When it comes to deals on Denver-Sidney, Montana flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Sidney, Montana flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Sidney, Montana flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Denver-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 Denver-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 Denver to Sidney
Have a flexible travel schedule? Discover the best time to fly to Sidney from Denver 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.