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
10/10/25
1 Stopover (BIL)
UA1884, 9K1775
13h 42min
Return
11/04/25
1 Stopover (BIL)
9K1780, UA4758
09h 55min
United Airlines, Cape Air ?
$293
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
07/08/25
1 Stopover (BIL)
UA1884, 9K1785
24h 09min
Return
08/07/25
1 Stopover (BIL)
9K1780, UA5829
21h 28min
United Airlines, Cape Air ?
$344
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
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
07/08/25
2 Stopovers (DFW, BIL)
AA2078, AA4095, 9K1789
10h 45min
Return
08/07/25
2 Stopovers (BIL, ORD)
9K1780, AA3498, AA1387
11h 00min
American Airlines, Cape Air ?
$635
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
Denver
Sidney
Outbound
10/10/25
2 Stopovers (SEA, BIL)
AS0525, AS2479, 9K1785
11h 23min
Return
11/04/25
2 Stopovers (BIL, SEA)
9K1780, AS2084, AS0602
09h 34min
Alaska Airlines, Cape Air ?
$753
Denver
Sidney
Outbound
10/18/25
2 Stopovers (SEA, BIL)
AS0525, AS2479, 9K1785
11h 25min
Return
11/17/25
2 Stopovers (BIL, SEA)
9K1780, AS2084, AS0602
09h 34min
Alaska Airlines, Cape Air ?
$754
Prices based on recent searches, subject to last-minute changes
Page 1 / 2

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