Cheap Flights to Custer County from $110

View $110 flight on Mon, Jun 1, 2026Opens in a new window

Popular airlines to Custer County

  • Alaska Airlines

  • United

  • Delta

  • KLM

  • American Airlines

  • Air France

  • Virgin Atlantic

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How much is the cheapest flight to Custer County?

Prices were available within the past 7 days and start at $110 for one-way flights and $237 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, May 30 - Sat, Jun 6
SEA
Seattle
SUN
Sun Valley
$237 Roundtrip, found 6 days ago
$237
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Sat, May 30 from Seattle to Sun Valley, returning Sat, Jun 6, priced at $237 found 6 days ago
Alaska Airlines
Sat, Jun 6 - Sun, Jun 7
SEA
Seattle
SUN
Sun Valley
$257 Roundtrip, found 10 hours ago
$257
Roundtrip
found 10 hours ago
Select Alaska Airlines flight, departing Sat, Jun 6 from Seattle to Sun Valley, returning Sun, Jun 7, priced at $257 found 10 hours ago
Alaska Airlines
Thu, Oct 22 - Thu, Oct 29
SFO
San Francisco
SUN
Sun Valley
$261 Roundtrip, found 6 days ago
$261
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Oct 22 from San Francisco to Sun Valley, returning Thu, Oct 29, priced at $261 found 6 days ago
United
Fri, Sep 18 - Sat, Sep 19
SAN
San Diego
SUN
Sun Valley
$276 Roundtrip, found 5 hours ago
$276
Roundtrip
found 5 hours ago
Select United flight, departing Fri, Sep 18 from San Diego to Sun Valley, returning Sat, Sep 19, priced at $276 found 5 hours ago
Delta
Sat, Jun 6 - Mon, Jun 8
SEA
Seattle
SUN
Sun Valley
$277 Roundtrip, found 2 days ago
$277
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Jun 6 from Seattle to Sun Valley, returning Mon, Jun 8, priced at $277 found 2 days ago
Delta
Fri, Sep 18 - Sat, Sep 19
SAN
San Diego
SUN
Sun Valley
$281 Roundtrip, found 5 hours ago
$281
Roundtrip
found 5 hours ago
Select Delta flight, departing Fri, Sep 18 from San Diego to Sun Valley, returning Sat, Sep 19, priced at $281 found 5 hours ago
United
Fri, Sep 18 - Sat, Sep 19
SAN
San Diego
SUN
Sun Valley
$282 Roundtrip, found 5 hours ago
$282
Roundtrip
found 5 hours ago
Select United flight, departing Fri, Sep 18 from San Diego to Sun Valley, returning Sat, Sep 19, priced at $282 found 5 hours ago
Alaska Airlines
Thu, Jun 4 - Sat, Jun 6
SEA
Seattle
SUN
Sun Valley
$287 Roundtrip, found 2 days ago
$287
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Thu, Jun 4 from Seattle to Sun Valley, returning Sat, Jun 6, priced at $287 found 2 days ago
Alaska Airlines
Mon, Jul 13 - Fri, Jul 17
SFO
San Francisco
SUN
Sun Valley
$291 Roundtrip, found 5 days ago
$291
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Mon, Jul 13 from San Francisco to Sun Valley, returning Fri, Jul 17, priced at $291 found 5 days ago
American Airlines
Tue, Feb 16 - Tue, Feb 23
BOS
Boston
SUN
Sun Valley
$401 Roundtrip, found 1 day ago
$401
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Feb 16 from Boston to Sun Valley, returning Tue, Feb 23, priced at $401 found 1 day ago

Trending flights to Custer County

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

Alaska Airlines
Sat, May 30 - Sat, Jun 6
SEA
Seattle
SUN
Sun Valley
$237 Roundtrip, found 6 days ago
$237
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Sat, May 30 from Seattle to Sun Valley, returning Sat, Jun 6, priced at $237 found 6 days ago

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, $237 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 San Francisco (SFO) sold for as low as $110 in the last seven days. During this period, the price of a return journey to Custer County ranged between $237 and $401. 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 $237 and $401. Prices depend on the departure time, carrier, cabin class and when the fare is booked.
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.
How long is a flight to Custer County?
It could be an hour or two or more — it really depends on which part of the U.S. You're coming from. The average flight times for these top domestic routes to Custer County will give you a good idea of what to expect:

  • Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise Airport (BOI) - 1 hour and 26 minutes
  • Denver, CO (DEN-Denver Intl.) to Boise Airport (BOI) - 1 hour and 57 minutes
  • San Francisco, CA (SFO-San Francisco Intl.) to Boise Airport (BOI) - 1 hour and 40 minutes

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 45ºF to 75ºF throughout the season, so travel around then if warmer weather is your preference.

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Travel information

*Flight schedules are subject to change.

*Available to One Key members.

 

*Flight schedules are subject to change.

*Available to One Key members.