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
10/18/25
1 Stopover (BIL)
UA5272, 9K1781
24h 05min
Return
11/17/25
1 Stopover (BIL)
9K1776, UA0478
23h 03min
United Airlines, Cape Air ?
$277
Best option
Denver
Sidney
Outbound
09/04/25
1 Stopover (BIL)
UA5272, 9K1785
05h 53min
Return
09/28/25
1 Stopover (BIL)
9K1776, UA5571
24h 52min
United Airlines, Cape Air ?
$284
Denver
Sidney
Outbound
06/08/25
1 Stopover (BIL)
UA1884, 9K1789
21h 08min
Return
06/29/25
1 Stopover (BIL)
9K1788, UA5829
16h 08min
United Airlines, Cape Air ?
$312
Denver
Sidney
Outbound
06/07/25
1 Stopover (BIL)
UA1884, 9K1789
21h 08min
Return
06/23/25
1 Stopover (BIL)
9K1776, UA4758
26h 27min
United Airlines, Cape Air ?
$321
Denver
Sidney
Outbound
06/18/25
1 Stopover (BIL)
UA1884, 9K1775
13h 17min
Return
07/15/25
1 Stopover (BIL)
9K1784, UA5829
17h 58min
United Airlines, Cape Air ?
$349
Denver
Sidney
Outbound
06/18/25
1 Stopover (BIL)
UA1884, 9K1775
13h 17min
Return
07/15/25
1 Stopover (BIL)
9K1776, UA5282
26h 27min
United Airlines, Cape Air ?
$365
Denver
Sidney
Outbound
07/02/25
1 Stopover (BIL)
UA1884, 9K1789
21h 19min
Return
07/25/25
1 Stopover (BIL)
9K1776, UA5829
13h 37min
United Airlines, Cape Air ?
$435
Denver
Sidney
Outbound
06/08/25
1 Stopover (BIL)
UA1884, 9K1775
13h 20min
Return
06/12/25
1 Stopover (BIL)
9K1778, UA0372
25h 07min
United Airlines, Cape Air ?
$448
Denver
Sidney
Outbound
11/03/25
2 Stopovers (PHX, BIL)
AA2447, AA3727, 9K1775
21h 17min
Return
11/12/25
2 Stopovers (BIL, PHX)
9K1784, AA3661, AA1997
26h 46min
American Airlines, Cape Air ?
$483
Denver
Sidney
Outbound
11/03/25
2 Stopovers (SEA, BIL)
AS0643, AS2084, 9K1789
09h 43min
Return
11/12/25
2 Stopovers (BIL, SEA)
9K1780, AS2084, AS0602
09h 34min
Alaska Airlines, Cape Air ?
$718
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 $276.07
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