$42 Cheap Flights from Billings (BIL) to Sidney (SDY)

View $42 flight on Wed, Nov 19, 2025Opens in a new window

Popular airlines from Billings Logan Intl. Airport (BIL) to Sidney, MT (SDY-Sidney-Richland Municipal)

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Cheap Flights from Billings to Sidney (BIL-SDY)

Prices were available within the past 7 days and start at $42 for one-way flights and $92 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Cape Air
Sat, Aug 9 - Sat, Aug 30
BIL
Billings
SDY
Sidney
$92 Roundtrip, found 1 day ago
$92
Roundtrip
found 1 day ago
Select Cape Air flight, departing Sat, Aug 9 from Billings to Sidney, returning Sat, Aug 30, priced at $92 found 1 day ago
Cape Air
Thu, Aug 14 - Mon, Aug 18
BIL
Billings
SDY
Sidney
$100 Roundtrip, found 2 hours ago
$100
Roundtrip
found 2 hours ago
Select Cape Air flight, departing Thu, Aug 14 from Billings to Sidney, returning Mon, Aug 18, priced at $100 found 2 hours ago
Cape Air
Mon, Aug 11 - Tue, Aug 12
BIL
Billings
SDY
Sidney
$110 Roundtrip, found 17 hours ago
$110
Roundtrip
found 17 hours ago
Select Cape Air flight, departing Mon, Aug 11 from Billings to Sidney, returning Tue, Aug 12, priced at $110 found 17 hours ago
Cape Air
Mon, Aug 11 - Tue, Aug 12
BIL
Billings
SDY
Sidney
$120 Roundtrip, found 17 hours ago
$120
Roundtrip
found 17 hours ago
Select Cape Air flight, departing Mon, Aug 11 from Billings to Sidney, returning Tue, Aug 12, priced at $120 found 17 hours ago
Cape Air
Thu, Jul 31 - Sun, Aug 3
BIL
Billings
SDY
Sidney
$130 Roundtrip, found 5 days ago
$130
Roundtrip
found 5 days ago
Select Cape Air flight, departing Thu, Jul 31 from Billings to Sidney, returning Sun, Aug 3, priced at $130 found 5 days ago

Alternative airports near Sidney

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Sidney-Richland Municipal SDY. Cheapest and Closest option available. Average driving time to city center is 3 minutes. Flights from $92
SDY
Sidney-Richland Municipal
CheapestClosest
Average driving time to city center3 min
Flights from $92
Flights from Billings (BIL) to Sidney (SDY)
Origin airport
Logan Intl.
Destination airport
Sidney-Richland Municipal
Airlines serving
Cape Air
Roundtrip price
$92
Distance
244 mi
Average flight time
1 hour 42 mins

Billings to Sidney Flights

The cheapest times to fly from Billings to Sidney

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Billings to Sidney are during the month of August. You can find some of the cheapest flights from Billings to Sidney with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Billings to Sidney

Sunday is one of the best days to book for cheap flights from Billings to Sidney: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Billings to Sidney

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Billings to Sidney in 2025. You can also book with separate airlines for your outbound and return journeys, from $42 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Billings to Sidney flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Billings to Sidney airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Logan Intl. Airport (BIL) to Sidney-Richland Municipal Airport (SDY) cost?
Cheap return flights from Logan Intl. Airport (BIL) to Sidney-Richland Municipal Airport (SDY) start at $100. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Hahn Air flight leaving BIL on August 13 2025 and touching down at SDY. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from BIL to SDY?
The cheapest flights from BIL to SDY are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Logan Intl. Airport (BIL) to Sidney-Richland Municipal Airport (SDY)?
If you're departing from Logan Intl. Airport (BIL), you can jump on a direct flight to Sidney-Richland Municipal Airport (SDY) with Cape Air.
What is the cheapest airline that flies from BIL to SDY?
With prices as low as $50 for a one-way journey from BIL to SDY, Hahn Air is currently the cheapest airline flying this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from BIL on August 8 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from Logan Intl. Airport (BIL) to Sidney-Richland Municipal Airport (SDY)?
Every day on average, 5 nonstop flights take off from Logan Intl. Airport (BIL) to Sidney-Richland Municipal Airport (SDY). Select the departure date that best suits your plans.
What are the most popular departure times for flights from Logan Intl. Airport (BIL) to Sidney-Richland Municipal Airport (SDY)?
More passengers fly between BIL and SDY at 7 AM than at any other time. Prefer a quieter experience? Travel outside of rush hours and you're likely to save on your ticket as well.
What day of the week has the most flights from BIL to SDY?
If you jet off on a Friday, you'll get the largest range of options for flights from Logan Intl. Airport (BIL) to Sidney-Richland Municipal Airport (SDY).
What is the earliest flight from Logan Intl. Airport (BIL) to Sidney-Richland Municipal Airport (SDY)?
Logan Intl. Airport (BIL)'s first flight to Sidney-Richland Municipal Airport (SDY) is at approximately 7:15AM UTC-7. With a total travel time of 1h 43m, you'll touch down at around 8:58AM UTC-7.
How long does it take to fly from Logan Intl. Airport (BIL) to Sidney-Richland Municipal Airport (SDY)?
The average flight time from BIL to SDY is 1 hour and 46 minutes, covering a total distance of 240 mi.
What airline has the least delays from BIL to SDY?
Consider traveling with Cape Air if you'd like to go straight from Logan Intl. Airport (BIL) to Sidney-Richland Municipal Airport (SDY) without any interruptions. This airline has the best track record for punctuality, with an on-time performance of 82%. Want to be updated if anything changes? You can check your flight status using the Expedia App.
What is the best time to fly from Logan Intl. Airport (BIL) to Sidney-Richland Municipal Airport (SDY)?
To touch down at Sidney-Richland Municipal Airport (SDY) on schedule, select a flight that takes off from Logan Intl. Airport (BIL) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Sidney from Logan Intl. Airport (BIL)?
You can land at Sidney-Richland Municipal Airport (SDY) or Dawson Community Airport (GDV) when you travel to Sidney on a direct flight from Logan Intl. Airport (BIL).
Is it cheaper to buy a plane ticket from Logan Intl. Airport (BIL) to Sidney-Richland Municipal Airport (SDY) last-minute?
Last-minute bookings from BIL to SDY are generally more expensive. For the best rates, start searching for flights well in advance. That being said, if you can play around with your travel dates, you may find a cheap ticket right before you leave.
Is it cheaper to book a BIL to SDY flight and hotel package?
You'll generally save money by securing a BIL to SDY flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. Once you've chosen your ideal accommodations and flights, consider adding extras including activities, tours and car rentals.
Can I cancel or change the date of my flight from Logan Intl. Airport (BIL) to Sidney-Richland Municipal Airport (SDY)?
Typically, you're able to reschedule or cancel your BIL to SDY flight. However, additional charges may apply, especially if you booked more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like further details, visit our Customer Service portal.

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