Cheap Flights to Custer County

View AU$1,155 flight on Wed, 11 Feb 2026Opens in a new window

Popular airlines to Custer County

  • Alaska Airlines

  • United

  • Delta

  • American Airlines

  • Hawaiian Airlines

  • KLM

  • Virgin Atlantic

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Cheapest Flights to Custer County

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

United
Wed, 11 Feb - Tue, 24 Feb
SYD
Sydney
SUN
Sun Valley
AU$1,760 Return, found 1 day ago
AU$1,760
Return
found 1 day ago
Select United flight, departing Wed, 11 Feb from Sydney to Sun Valley, returning Tue, 24 Feb, priced at AU$1,760 found 1 day ago
Delta
Wed, 11 Feb - Tue, 24 Feb
SYD
Sydney
SUN
Sun Valley
AU$1,760 Return, found 1 day ago
AU$1,760
Return
found 1 day ago
Select Delta flight, departing Wed, 11 Feb from Sydney to Sun Valley, returning Tue, 24 Feb, priced at AU$1,760 found 1 day ago
United
Wed, 11 Feb - Tue, 24 Feb
SYD
Sydney
SUN
Sun Valley
AU$2,010 Return, found 1 day ago
AU$2,010
Return
found 1 day ago
Select United flight, departing Wed, 11 Feb from Sydney to Sun Valley, returning Tue, 24 Feb, priced at AU$2,010 found 1 day ago
United
Wed, 11 Feb - Tue, 24 Feb
SYD
Sydney
SUN
Sun Valley
AU$2,019 Return, found 1 day ago
AU$2,019
Return
found 1 day ago
Select United flight, departing Wed, 11 Feb from Sydney to Sun Valley, returning Tue, 24 Feb, priced at AU$2,019 found 1 day ago
United
Wed, 11 Feb - Tue, 24 Feb
SYD
Sydney
SUN
Sun Valley
AU$2,027 Return, found 1 day ago
AU$2,027
Return
found 1 day ago
Select United flight, departing Wed, 11 Feb from Sydney to Sun Valley, returning Tue, 24 Feb, priced at AU$2,027 found 1 day ago
United
Wed, 11 Feb - Tue, 24 Feb
SYD
Sydney
SUN
Sun Valley
AU$2,149 Return, found 1 day ago
AU$2,149
Return
found 1 day ago
Select United flight, departing Wed, 11 Feb from Sydney to Sun Valley, returning Tue, 24 Feb, priced at AU$2,149 found 1 day ago
United
Wed, 11 Feb - Tue, 24 Feb
SYD
Sydney
SUN
Sun Valley
AU$2,472 Return, found 1 day ago
AU$2,472
Return
found 1 day ago
Select United flight, departing Wed, 11 Feb from Sydney to Sun Valley, returning Tue, 24 Feb, priced at AU$2,472 found 1 day ago
United
Wed, 11 Feb - Tue, 24 Feb
SYD
Sydney
SUN
Sun Valley
AU$2,480 Return, found 1 day ago
AU$2,480
Return
found 1 day ago
Select United flight, departing Wed, 11 Feb from Sydney to Sun Valley, returning Tue, 24 Feb, priced at AU$2,480 found 1 day ago
United
Wed, 11 Feb - Tue, 24 Feb
SYD
Sydney
SUN
Sun Valley
AU$2,489 Return, found 1 day ago
AU$2,489
Return
found 1 day ago
Select United flight, departing Wed, 11 Feb from Sydney to Sun Valley, returning Tue, 24 Feb, priced at AU$2,489 found 1 day ago
American Airlines
Wed, 11 Feb - Tue, 24 Feb
SYD
Sydney
SUN
Sun Valley
AU$2,546 Return, found 1 day ago
AU$2,546
Return
found 1 day ago
Select American Airlines flight, departing Wed, 11 Feb from Sydney to Sun Valley, returning Tue, 24 Feb, priced at AU$2,546 found 1 day ago

Custer County Flights

When was the last time you embarked on a grand adventure? Whether it was last month or years ago, there’s never been a better time to start planning your next big trip. Book tickets to Custer County today and get ready to build your travel itinerary, from exploring the area with your family to recharging in the change of scenery. During your stay, visit the must-see attractions, chow down on the local cuisine, and relish in a holiday state of mind. However you decide to spend your upcoming trip, we’re here to make your travel plans easy and affordable.

Book Your Custer County Airfare

At Expedia.com.au, it’s simple to find cheap flights to Custer County that won’t cause your wallet to flinch. Browse through our inventory of Custer County flights and find airfare matching your preferred times and dates. Looking for a red-eye flight or an afternoon departure? Don’t worry, we’ve got you covered. You can even take advantage of our convenient My Scratchpad online feature, which lets you track your search results with ease. No more excuses; book your travel arrangements with us today to make your dream trip a reality.

Custer County Flights Information

Airlines serving
United, Delta, American Airlines, Qantas Airways
Roundtrip price
from AU$1,760

Frequently asked questions

How do I find cheap flights to Custer County that have flexible change policies?
Search for your bargain flights to Custer County, then mark the "No change fee" box underneath the "Flexible change policies" heading. It's as simple as that. We appreciate that plans can change and flexibility is essential, so you can book with confidence with Expedia.
Which airlines fly to Custer County?
With a great selection of airlines offering flights into or near Custer County, the choice is all yours:

  • Alaska Airlines - 754 flights to or near Custer County each month, including 754 flights to Boise Airport (BOI) per month.
  • Delta Air Lines - 489 flights to or near Custer County each month, including 489 flights to Boise Airport (BOI) per month.
  • United Airlines - 303 flights to or near Custer County each month, including 303 flights to Boise Airport (BOI) per month.

How can I find cheap tickets to Custer County?
An excellent strategy for getting your hands on cheap airfares is to be flexible with your dates. Start by searching for your flight to Custer County, then click on the "flexible dates" link to compare prices for nearby days. Another good tip? Book well ahead. To give you an idea of fares, AU$1,760 was the best price for a flight to Custer County in the last seven days.
How much is a flight to Custer County?
One-way flights leaving Sydney (SYD) sold for as low as AU$1,155 in the last seven days. During this period, the price of a return journey to Custer County ranged between AU$1,760 and AU$2,546. If you find a bargain ticket, book immediately — these fares don't stick around.
What are the most popular airports to fly into in Custer County?
Start planning your Custer County trip by securing a seat on one of the 1 994 flights each month to Boise Airport (BOI). This is the region's main entryway.
When is the cheapest time to fly to Custer County?
Fly out on a Tuesday to increase your chances of getting the cheapest deal to Custer County. Mondays are usually the second most affordable day to take off. Saturday is normally the priciest day to fly anywhere.
How much is a plane ticket to Custer County?
In the last seven days, flights to Custer County varied between AU$1,760 and AU$2,546. Prices depend on the departure time, carrier, cabin class and when the fare is booked.
What is the best time to go to Custer County?
May, June and July are the most popular months to explore Challis, one of Custer County's most famous cities. Summertime here starts June 20. Average temperatures range from 7ºC to 24ºC throughout the season, so travel around then if warmer weather is your preference.
What months are the cheapest to book a flight to Custer County?
The best month to book a terrific deal to Custer County is February, whereas prices are at their highest in December. Keep clear of this month if you're counting your pennies.

Trending flights to Custer County

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, 11 Feb - Tue, 24 Feb
SYD
Sydney
SUN
Sun Valley
AU$1,760 Return, found 1 day ago
AU$1,760
Return
found 1 day ago
Select United flight, departing Wed, 11 Feb from Sydney to Sun Valley, returning Tue, 24 Feb, priced at AU$1,760 found 1 day ago
*Available to Expedia members.