Flight Routes from Denver to Sidney

Trip type

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
Best option
Denver
Sidney
Outbound
04/16/26
1 Stopover (BIL)
UA4762, 9K1777
04h 29min
Return
05/09/26
1 Stopover (BIL)
9K1788, UA5829
16h 11min
United Airlines, Cape Air ?
$332
Denver
Sidney
Outbound
07/26/26
1 Stopover (BIL)
UA1417, 9K1777
16h 55min
Return
08/05/26
1 Stopover (BIL)
9K1776, UA0372
15h 39min
United Airlines, Cape Air ?
$351
Denver
Sidney
Outbound
06/25/26
1 Stopover (BIL)
UA5498, 9K1785
04h 13min
Return
06/30/26
1 Stopover (BIL)
9K1780, UA5590
08h 15min
United Airlines, Cape Air ?
$634
found yesterday
Denver
Sidney
Outbound
05/16/26
2 Stopovers (SEA, BIL)
AS0643, AS2084, 9K1789
10h 45min
Return
05/29/26
2 Stopovers (BIL, PDX)
9K1784, AS2181, AS0711
08h 45min
Alaska Airlines, Cape Air ?
$785
Denver
Sidney
Outbound
07/26/26
2 Stopovers (SEA, BIL)
AS0643, AS2054, 9K1789
10h 45min
Return
08/05/26
2 Stopovers (BIL, PDX)
9K1784, AS3049, AS1627
08h 47min
Alaska Airlines, Cape Air ?
$977
Denver
Sidney
Outbound
06/25/26
2 Stopovers (PDX, BIL)
AS1626, AS2368, 9K1785
11h 48min
Return
06/30/26
2 Stopovers (BIL, PDX)
9K1784, AS2297, AS1627
08h 36min
Alaska Airlines, Cape Air ?
$1,190
found yesterday
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 $ 331,60
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