Cheap Flights from Hilo (ITO) to Sidney (SDY)
Popular airlines from Hilo Intl. Airport (ITO) to Sidney, MT (SDY-Sidney-Richland Municipal)
American AirlinesAmerican Airlines
UnitedUnited
Southwest AirlinesSouthwest Airlines
DeltaDelta
Frontier AirlinesFrontier Airlines
JetBlue AirwaysJetBlue Airways
Alaska AirlinesAlaska Airlines
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Hilo to Sidney Flights
The cheapest times to fly from Hilo 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 Hilo to Sidney are during the month of . You can find some of the cheapest flights from Hilo to Sidney with Expedia's search tool and vast selection of airlines.
The best time to book a flight from Hilo to Sidney
Sunday is one of the best days to book for cheap flights from Hilo 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 Hilo 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 Hilo 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 Hilo 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 Hilo 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 Hilo Intl. Airport (ITO) to Sidney-Richland Municipal Airport (SDY) cost?
Get a cheap one-way flight or cheap return flight from Hilo Intl. Airport (ITO) 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 Hilo Intl. Airport (ITO) to Sidney-Richland Municipal Airport (SDY)?
is the most affordable month to fly from ITO to SDY. Traveling during quieter months is often the key to better flight prices.
What is the cheapest airline that flies from Hilo Intl. Airport (ITO) to Sidney-Richland Municipal Airport (SDY)?
Use the filter tool on Expedia to compare different airlines and find the most affordable carrier that'll take you from ITO to SDY. Then, sort your results by "Price (lowest to highest)" to score the best deal available.
How many flights per day from Hilo Intl. Airport (ITO) to Sidney-Richland Municipal Airport (SDY)?
Direct flights from Hilo Intl. Airport (ITO) 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 Expedia's filters. Enter your travel dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from ITO to SDY?
Generally you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* However, this can vary depending on the airline, season and other factors.
*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Hilo Intl. Airport (ITO) to Sidney-Richland Municipal Airport (SDY)?
Choose a flight from Hilo Intl. Airport (ITO) to Sidney-Richland Municipal Airport (SDY) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures after this hour are on average 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 Hilo Intl. Airport (ITO) to Sidney-Richland Municipal Airport (SDY) last-minute?
Waiting until just before your departure to book a flight from ITO to SDY generally means paying more. Although you may find some last-minute offers, they're not always guaranteed. Keep your travel schedule open to maximize your chances of getting a bargain.
Is it cheaper to book an ITO to SDY flight and hotel package?
You'll generally save money by booking an ITO to SDY flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've chosen your ideal flights and accommodations, you can add extras like car rentals, tours and activities.
Can I cancel or change the date of my flight from Hilo Intl. Airport (ITO) to Sidney-Richland Municipal Airport (SDY)?
In most cases, you can cancel or modify your ITO to SDY flight. However, there may be additional fees, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's policies and fees on flight changes, or if you need further details, visit our Customer Service portal.
Travel information
Origin airport | Hilo Intl. Airport |
|---|---|
Destination airport | Sidney, MT |
Distance | 3,420 miles away |