$10,247 Cheap Flights from Raleigh (RDU) to Sidney (SDY)

View $10,247 flight on Mon, Nov 24, 2025Opens in a new window

Popular airlines from Raleigh-Durham International Airport (RDU) to Sidney, MT (SDY-Sidney-Richland Municipal)

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Cheap Flights from Raleigh to Sidney (RDU-SDY)

Prices were available within the past 7 days and start at $10,247 for one-way flights and $695 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Aug 1 - Sat, Aug 8
RDU
Raleigh
SDY
Sidney
$695 Roundtrip, found 6 days ago
$695
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sat, Aug 1 from Raleigh to Sidney, returning Sat, Aug 8, priced at $695 found 6 days ago

Frequently asked questions

How much does a flight from Raleigh - Durham Intl. Airport (RDU) to Sidney-Richland Municipal Airport (SDY) cost?
Get a cheap one-way flight from $10,247 or cheap return flight from $695 from Raleigh - Durham Intl. Airport (RDU) to Sidney-Richland Municipal Airport (SDY) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Raleigh - Durham Intl. Airport (RDU) to Sidney-Richland Municipal Airport (SDY)?
Flying in August is a great way to save, as it's the cheapest month for flights between RDU and SDY. You'll often find the lowest fares during the off-season.
What is the cheapest airline that flies from Raleigh - Durham Intl. Airport (RDU) to Sidney-Richland Municipal Airport (SDY)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest RDU to SDY flight.
How many flights per day from Raleigh - Durham Intl. Airport (RDU) to Sidney-Richland Municipal Airport (SDY)?
You'll need to hop on a flight with a layover when traveling from Raleigh - Durham Intl. Airport (RDU) to Sidney-Richland Municipal Airport (SDY). There are no daily direct flights on this route. However, simply 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 RDU to SDY?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Raleigh - Durham Intl. Airport (RDU) to Sidney-Richland Municipal Airport (SDY)?
To avoid possible delays on the Raleigh - Durham Intl. Airport (RDU) to Sidney-Richland Municipal Airport (SDY) route, travel before 3 PM. Later flights are 22% more likely to be canceled.**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 Raleigh - Durham Intl. Airport (RDU) to Sidney-Richland Municipal Airport (SDY) last-minute?
Booking your ticket from RDU to SDY right before your trip is generally more expensive. However, if there's some wiggle room with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book a RDU to SDY flight and hotel package?
Compared with arranging flights and hotels separately, booking a RDU to SDY flight and hotel package with Expedia could result in significant savings. Better still, managing everything in one place takes the hassle out of travel planning. Just secure your flights and choose from our extensive range of stays, then customize your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Raleigh - Durham Intl. Airport (RDU) to Sidney-Richland Municipal Airport (SDY)?
You can usually reschedule or cancel your RDU to SDY flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Raleigh - Durham Intl.
Destination airport
Sidney-Richland Municipal
Roundtrip price
$694
Distance
1531 mi

Book with confidence

Raleigh to Sidney Flights

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

 

The best time to book a flight from Raleigh to Sidney

Sunday is one of the best days to book for cheap flights from Raleigh 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 Raleigh 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 Raleigh to Sidney in 2025. You can also book with separate airlines for your outbound and return journeys, from $10,247 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 Raleigh 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 Raleigh 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.

 

Raleigh to Sidney Flights

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