$648 Cheap Flights from Singapore (SIN) to Helena (HLN)

View $648 flight on Tue, Feb 10, 2026Opens in a new window

Popular airlines from Singapore Changi Airport (SIN) to Helena, MT (HLN-Helena Regional)

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Cheap Flights from Singapore to Helena (SIN-HLN)

Prices were available within the past 7 days and start at $648 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from Singapore (SIN) to Helena (HLN)
Origin airport
Changi
Destination airport
Helena Regional
Distance
8469 mi

Singapore to Helena Flights

The cheapest times to fly from Singapore to Helena

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 Singapore to Helena are during the month of . You can find some of the cheapest flights from Singapore to Helena with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Singapore to Helena

Sunday is one of the best days to book for cheap flights from Singapore to Helena: 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 Singapore to Helena

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 Singapore to Helena in 2025. You can also book with separate airlines for your outbound and return journeys, from $648 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 Singapore to Helena 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 Singapore to Helena 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 Changi Airport (SIN) to Helena Regional Airport (HLN) cost?
Get a cheap one-way flight from $648 or cheap return flight from Changi Airport (SIN) to Helena Regional Airport (HLN) 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 Changi Airport (SIN) to Helena Regional Airport (HLN)?
Flying in is a good way to save, as it's the cheapest month for flights between SIN and HLN. You'll usually find the lowest fares during off-peak months.
What is the cheapest airline that flies from Changi Airport (SIN) to Helena Regional Airport (HLN)?
Use the filter tool on Expedia to compare airlines and find the most affordable carrier that'll fly you from SIN to HLN. Then, sort your results by "Price (lowest to highest)" to snap up a good deal.
How many flights per day from Changi Airport (SIN) to Helena Regional Airport (HLN)?
Nonstop flights from Changi Airport (SIN) to Helena Regional Airport (HLN) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SIN to HLN?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change 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 Changi Airport (SIN) to Helena Regional Airport (HLN)?
Choose a flight from Changi Airport (SIN) to Helena Regional Airport (HLN) that takes off before 3 PM to reduce the likelihood of delays. Departures after this time 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 Changi Airport (SIN) to Helena Regional Airport (HLN) last-minute?
Booking your flight from SIN to HLN just before your journey is typically more expensive. But if you're flexible with your departure times and dates, you could grab a cheap last-minute fare.
Is it cheaper to book a SIN to HLN flight and hotel package?
Compared with arranging flights and hotels separately, booking a SIN to HLN flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one place will take the stress out of planning your trip. Simply secure your flights and select from our wide range of hotels, then customize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Changi Airport (SIN) to Helena Regional Airport (HLN)?
In most cases, you can reschedule or cancel your SIN to HLN flight. However, additional charges may apply, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you want more details, visit our Customer Service portal.

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*Available to One Key members.