$170 Cheap Flights from San José (SJO) to Sun Valley (SUN)

View $170 flight on Wed, Dec 24, 2025Opens in a new window

Popular airlines from Juan Santamaria Intl. Airport (SJO) to Sun Valley, ID (SUN-Friedman Memorial)

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from San José to Sun Valley (SJO-SUN)

Prices were available within the past 7 days and start at $170 for one-way flights and $291 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Dec 21 - Wed, Dec 31
SJO
San José
SUN
Sun Valley
$291 Roundtrip, found 1 day ago
$291
Roundtrip
found 1 day ago
Select United flight, departing Sun, Dec 21 from San José to Sun Valley, returning Wed, Dec 31, priced at $291 found 1 day ago
United
Thu, Dec 18 - Wed, Dec 31
SJO
San José
SUN
Sun Valley
$296 Roundtrip, found 1 day ago
$296
Roundtrip
found 1 day ago
Select United flight, departing Thu, Dec 18 from San José to Sun Valley, returning Wed, Dec 31, priced at $296 found 1 day ago
American Airlines
Sun, Jan 25 - Sat, Jan 31
SJO
San José
SUN
Sun Valley
$301 Roundtrip, found 1 day ago
$301
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sun, Jan 25 from San José to Sun Valley, returning Sat, Jan 31, priced at $301 found 1 day ago
United
Tue, Dec 16 - Wed, Dec 31
SJO
San José
SUN
Sun Valley
$302 Roundtrip, found 1 day ago
$302
Roundtrip
found 1 day ago
Select United flight, departing Tue, Dec 16 from San José to Sun Valley, returning Wed, Dec 31, priced at $302 found 1 day ago
United
Thu, Jan 22 - Wed, Jan 28
SJO
San José
SUN
Sun Valley
$303 Roundtrip, found 1 day ago
$303
Roundtrip
found 1 day ago
Select United flight, departing Thu, Jan 22 from San José to Sun Valley, returning Wed, Jan 28, priced at $303 found 1 day ago
United
Mon, Jan 26 - Wed, Jan 28
SJO
San José
SUN
Sun Valley
$305 Roundtrip, found 1 day ago
$305
Roundtrip
found 1 day ago
Select United flight, departing Mon, Jan 26 from San José to Sun Valley, returning Wed, Jan 28, priced at $305 found 1 day ago
United
Mon, Dec 22 - Wed, Jan 7
SJO
San José
SUN
Sun Valley
$306 Roundtrip, found 2 days ago
$306
Roundtrip
found 2 days ago
Select United flight, departing Mon, Dec 22 from San José to Sun Valley, returning Wed, Jan 7, priced at $306 found 2 days ago
United
Thu, Jan 22 - Tue, Feb 3
SJO
San José
SUN
Sun Valley
$315 Roundtrip, found 1 day ago
$315
Roundtrip
found 1 day ago
Select United flight, departing Thu, Jan 22 from San José to Sun Valley, returning Tue, Feb 3, priced at $315 found 1 day ago
Delta
Mon, Dec 15 - Wed, Jan 7
SJO
San José
SUN
Sun Valley
$352 Roundtrip, found 1 day ago
$352
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Dec 15 from San José to Sun Valley, returning Wed, Jan 7, priced at $352 found 1 day ago
Alaska Airlines
Thu, Jan 22 - Fri, Jan 30
SJO
San José
SUN
Sun Valley
$700 Roundtrip, found 3 days ago
$700
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, Jan 22 from San José to Sun Valley, returning Fri, Jan 30, priced at $700 found 3 days ago

Alternative airports near Sun Valley

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Friedman Memorial SUN. Cheapest and Closest option available. Average driving time to city center is 23 minutes. Flights from $296
SUN
Friedman Memorial
CheapestClosest
Average driving time to city center23 min
Flights from $296
Flights from San José (SJO) to Sun Valley (SUN)
Origin airport
Juan Santamaría Intl.
Destination airport
Friedman Memorial
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$291
Distance
2934 mi

San José to Sun Valley Flights

The cheapest times to fly from San José to Sun Valley

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 San José to Sun Valley are during the month of December. You can find some of the cheapest flights from San José to Sun Valley with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San José to Sun Valley

Sunday is one of the best days to book for cheap flights from San José to Sun Valley: 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 San José to Sun Valley

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 San José to Sun Valley in 2026. You can also book with separate airlines for your outbound and return journeys, from $170 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 San José to Sun Valley 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 San José to Sun Valley 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 Juan Santamaria Intl. Airport (SJO) to Friedman Memorial Airport (SUN) cost?
Get a cheap one-way flight from $170 or cheap return flight from $291 from Juan Santamaria Intl. Airport (SJO) to Friedman Memorial Airport (SUN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Juan Santamaria Intl. Airport (SJO) to Friedman Memorial Airport (SUN)?
Flying in December can help you save, as it's the cheapest month for flights between SJO and SUN. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Juan Santamaria Intl. Airport (SJO) to Friedman Memorial Airport (SUN)?
Use the filter tool on Expedia to compare different airlines and find the most affordable carrier that'll take you from SJO to SUN. Then, sort your results by "Price (lowest to highest)" to score a good deal.
How many flights per day from Juan Santamaria Intl. Airport (SJO) to Friedman Memorial Airport (SUN)?
Nonstop flights from Juan Santamaria Intl. Airport (SJO) to Friedman Memorial Airport (SUN) 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 details and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SJO to SUN?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Juan Santamaria Intl. Airport (SJO) to Friedman Memorial Airport (SUN)?
To land at Friedman Memorial Airport (SUN) on time, pick a flight that leaves Juan Santamaria Intl. Airport (SJO) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Juan Santamaria Intl. Airport (SJO) to Friedman Memorial Airport (SUN) last-minute?
Holding off until just before your departure to book a flight from SJO to SUN often results in higher prices. While you may come across some last-minute deals, they aren't always guaranteed. Allow some flexibility in your schedule to boost your chances of getting a bargain.
Is it cheaper to book a SJO to SUN flight and hotel package?
You'll typically save money by securing a SJO to SUN 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 it all in one convenient place. After selecting your ideal accommodations and flights, consider other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Juan Santamaria Intl. Airport (SJO) to Friedman Memorial Airport (SUN)?
It's usually possible to reschedule or cancel your SJO to SUN flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more details on our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.