Cheap Flights from Duluth (DLH) to Sidney (SDY)

Popular airlines from Duluth, MN (DLH-Duluth Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal)

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Cheap Flights from Duluth to Sidney (DLH-SDY)

Prices were available within the past 7 days and start at for one-way flights and $405 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Nov 8 - Sun, Nov 9
DLH
Duluth
SDY
Sidney
$405 Roundtrip, found 4 days ago
$405
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, Nov 8 from Duluth to Sidney, returning Sun, Nov 9, priced at $405 found 4 days ago
Delta
Sat, Nov 8 - Wed, Nov 12
DLH
Duluth
SDY
Sidney
$514 Roundtrip, found 4 days ago
$514
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, Nov 8 from Duluth to Sidney, returning Wed, Nov 12, priced at $514 found 4 days ago
Delta
Sat, Nov 8 - Thu, Nov 13
DLH
Duluth
SDY
Sidney
$535 Roundtrip, found 4 days ago
$535
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, Nov 8 from Duluth to Sidney, returning Thu, Nov 13, priced at $535 found 4 days ago

Frequently asked questions

How much does a flight from Duluth Intl. Airport (DLH) to Sidney-Richland Municipal Airport (SDY) cost?
Grab a cheap one-way flight or cheap return flight from $405 from Duluth Intl. Airport (DLH) to Sidney-Richland Municipal Airport (SDY) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Duluth Intl. Airport (DLH) to Sidney-Richland Municipal Airport (SDY)?
Planning your trip for November can help you save, as it's the cheapest month for flights between DLH and SDY. You'll usually find the lowest fares during the off-season.
What is the cheapest airline that flies from Duluth Intl. Airport (DLH) to Sidney-Richland Municipal Airport (SDY)?
To find the cheapest airline flying from DLH to SDY, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Duluth Intl. Airport (DLH) to Sidney-Richland Municipal Airport (SDY)?
You'll have to book a flight with a layover when traveling from Duluth Intl. Airport (DLH) to Sidney-Richland Municipal Airport (SDY). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from DLH to SDY?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change depending on a range of factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Duluth Intl. Airport (DLH) to Sidney-Richland Municipal Airport (SDY)?
Select a flight from Duluth Intl. Airport (DLH) to Sidney-Richland Municipal Airport (SDY) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**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.
Is it cheaper to buy a plane ticket from Duluth Intl. Airport (DLH) to Sidney-Richland Municipal Airport (SDY) last-minute?
Waiting until just before your trip to book your flight from DLH to SDY often results in higher prices. While you may find some last-minute discounts, they aren't always guaranteed. Keep your travel schedule open to maximize your chances of snagging a bargain.
Is it cheaper to book a DLH to SDY flight and hotel package?
You can save money by securing a DLH 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. After selecting your preferred flights and accommodations, consider adding extras such as activities, tours and car rentals.
Can I cancel or change the date of my flight from Duluth Intl. Airport (DLH) to Sidney-Richland Municipal Airport (SDY)?
It's usually possible to cancel or reschedule your DLH to SDY flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Travel information

Origin airport
Duluth Intl.
Destination airport
Sidney-Richland Municipal
Roundtrip price
$405
Distance
565 mi

Book with confidence

Book with confidence

Duluth to Sidney Flights

The cheapest times to fly from Duluth 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 Duluth to Sidney are during the month of November. You can find some of the cheapest flights from Duluth to Sidney with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Duluth to Sidney

Sunday is one of the best days to book for cheap flights from Duluth 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 Duluth 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 Duluth to Sidney in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 Duluth 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 Duluth 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.

 

Duluth to Sidney Flights

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Explore a world of travel with Expedia

*Available to One Key members.