Cheap Flights from Sun Valley (SUN) to Sidney (SDY)
Popular airlines from Sun Valley, ID (SUN-Friedman Memorial) to Sidney, MT (SDY-Sidney-Richland Municipal)
American AirlinesAmerican Airlines
UnitedUnited
Southwest AirlinesSouthwest Airlines
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Frontier AirlinesFrontier Airlines
JetBlue AirwaysJetBlue Airways
Alaska AirlinesAlaska Airlines
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Sun Valley to Sidney Flights
The cheapest times to fly from Sun Valley 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 Sun Valley to Sidney are during the month of . You can find some of the cheapest flights from Sun Valley to Sidney with Expedia's search tool and vast selection of airlines.
The best time to book a flight from Sun Valley to Sidney
Sunday is one of the best days to book for cheap flights from Sun Valley 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 Sun Valley 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 Sun Valley to Sidney in 2026. 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 Sun Valley 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 Sun Valley 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 Friedman Memorial Airport (SUN) to Sidney-Richland Municipal Airport (SDY) cost?
Snag a cheap one-way flight or cheap return flight from Friedman Memorial Airport (SUN) 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 Friedman Memorial Airport (SUN) to Sidney-Richland Municipal Airport (SDY)?
Planning your getaway for can help you save, as it's the cheapest month for flights between SUN and SDY. You'll typically find the lowest prices during off-peak months.
What is the cheapest airline that flies from Friedman Memorial Airport (SUN) to Sidney-Richland Municipal Airport (SDY)?
To find the cheapest airline flying from SUN to SDY, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Friedman Memorial Airport (SUN) to Sidney-Richland Municipal Airport (SDY)?
Direct flights from Friedman Memorial Airport (SUN) to Sidney-Richland Municipal Airport (SDY) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SUN to SDY?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during peak travel times or public holidays.
*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Friedman Memorial Airport (SUN) to Sidney-Richland Municipal Airport (SDY)?
To touch down at Sidney-Richland Municipal Airport (SDY) without delays, select a flight that leaves from Friedman Memorial Airport (SUN) 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.
Is it cheaper to buy a plane ticket from Friedman Memorial Airport (SUN) to Sidney-Richland Municipal Airport (SDY) last-minute?
Booking your ticket from SUN to SDY right before your getaway is generally more expensive. But if you're flexible with your departure times and dates, you could score a cheap last-minute fare.
Is it cheaper to book a SUN to SDY flight and hotel package?
Opting for a SUN to SDY flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Select from our impressive range of hotels and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Friedman Memorial Airport (SUN) to Sidney-Richland Municipal Airport (SDY)?
You can usually reschedule or cancel your SUN to SDY flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more information on our Customer Service portal.
Travel information
Origin airport | Sun Valley, ID |
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Destination airport | Sidney, MT |
Distance | 568 miles away |