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Sidney

$87+ Cheap flights from Sidney, MT

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
SDY — BIL
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Find flights from Sidney

Cheapest flights from Sidney
Explore the most affordable flight options available from Sidney. Find the lowest fares based on data from user searches, with prices last updated on January 29, 2026.

This Mytrip deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/112:55 pm
SDY
-
BIL
Nonstop1h 53m
Cape Air
Sun 2/1512:35 pm
BIL
-
SDY
Nonstop1h 45m
Cape Air
Deal found 1/27$87
This Cape Air deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cape Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/125:10 pm
SDY
-
BIL
Nonstop1h 55m
Cape Air
Mon 2/162:54 pm
BIL
-
SDY
Nonstop1h 45m
Cape Air
Deal found 1/28$100

Find flights from Sidney within your budget

 
Find flights departing from Sidney that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on January 29, 2026. In the last 7 days, Cheapflights users made a total of 2,558,603 searches

Fly to

Billings

Route

Depart

Return

Price

SidneyBillings

SDY - BIL

SDYBIL

Sidney Richland Municipal

Wed 2/11

2:55 pm-4:48 pm

Nonstop1h 53m

Billings Logan Intl

Sun 2/15

12:35 pm-2:20 pm

Nonstop1h 45m

$87

SidneyBillings

SDY - BIL

SDYBIL

Sidney Richland Municipal

Fri 4/17

1:04 pm-2:56 pm

Nonstop1h 52m

Billings Logan Intl

Sat 4/18

6:06 pm-7:51 pm

Nonstop1h 45m

$100

SidneyBillings

SDY - BIL

SDYBIL

Sidney Richland Municipal

Thu 2/12

5:10 pm-7:05 pm

Nonstop1h 55m

Billings Logan Intl

Mon 2/16

2:54 pm-4:39 pm

Nonstop1h 45m

$100

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Best time to book a flight from Sidney

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Estimated round-trip price
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