Flights from Denver to Sidney

Our cheapest offers for flights from Denver to Sidney

Here you can compare cheap flights from Denver (DEN) to Sidney (SDY) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Sidney. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
Denver
Sidney
Outbound
11/09/25
1 Stopover (BIL)
UA1417, 9K1785
24h 09min
Return
12/07/25
1 Stopover (BIL)
9K1776, UA4758
26h 30min
United Airlines, Cape Air ?
$446
Best option
Denver
Sidney
Outbound
02/13/26
1 Stopover (BIL)
UA5339, 9K1789
08h 27min
Return
02/26/26
1 Stopover (BIL)
9K1776, UA0372
15h 37min
United Airlines, Cape Air ?
$448
Denver
Sidney
Outbound
02/13/26
2 Stopovers (SEA, BIL)
AS0643, AS2084, 9K1789
09h 45min
Return
02/26/26
2 Stopovers (BIL, SEA)
9K1780, AS2084, AS0602
09h 47min
Alaska Airlines, Cape Air ?
$907
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from Denver to Sidney

Favorite airline: Delta
The majority of passengers on the route Denver – Sidney prefer to fly with Delta.
Delta
50 %
Alaska Airlines
25 %
United Airlines
25 %
Favourite connection: via Salt Lake City and Billings
On this route, flights with a stopover in Salt Lake City and Billings are the most popular.
Route
bookings
2 stopovers Salt Lake City International Airport, UT Billings, MT
08h 10min, from $384
67 %
1 stopover Billings, MT
26h 13min, from $344
33 %

Important flight information

Flight information: Denver - Sidney

Roundtrip from $445.77
Distance 874 km
Departure airport Airport Denver International Airport, CO (DEN)
Arrival airport Airport Sidney-Richland, MT (SDY)
Destination country Flights to United States
Alternative routes to United States
Flight destinations with a similar price