Cheap flights from Denver, CO to Sidney, MT
Choose between Cape Air, Frontier Airlines, or Alaska Airlines to find the best price
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Tips to know when travelling to Sidney
Cheapest nonstop round-trip | $523 |
---|---|
Most popular airline | Cape Air |
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Travelers usually depart from Denver International, or Denver Union Station when they travel from Denver to Sidney. The most popular airlines for this route are Cape Air, Frontier Airlines, Alaska Airlines, American Airlines, and Allegiant Air. Denver and Sidney have 70 direct flights per week.
Check-in for a flight from Denver to Sidney
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
Cape Air | KAP | 9K | Yes | No |
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
Alaska Airlines | ASA | AS | No | Opens 24 days before flight Closes 1 hours before flight |
American Airlines | AAL | AA | No | No |
Allegiant Air | AAY | G4 | No | Opens 24 days before flight Closes 1 hours before flight |
Weather in Sidney
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | -3°C | -12°C |
February | -3°C | -12°C |
March | 4°C | -5°C |
April | 11°C | 0°C |
May | 18°C | 7°C |
June | 25°C | 13°C |
July | 29°C | 17°C |
August | 28°C | 16°C |
September | 23°C | 11°C |
October | 13°C | 3°C |
November | 4°C | -4°C |
December | -3°C | -10°C |
14 day forecast
Frequently asked questions
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