$171 Cheap Flights from Baltimore (BWI) to Sun Valley (SUN)

View $171 flight on Wed, Mar 25, 2026Opens in a new window

Popular airlines from Baltimore Washington Intl. Airport (BWI) to Sun Valley, ID (SUN-Friedman Memorial)

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Cheap Flights from Baltimore to Sun Valley (BWI-SUN)

Prices were available within the past 7 days and start at $171 for one-way flights and $334 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Mar 21 - Sat, Mar 28
BWI
Baltimore
SUN
Sun Valley
$334 Roundtrip, found 12 hours ago
$334
Roundtrip
found 12 hours ago
Select United flight, departing Sat, Mar 21 from Baltimore to Sun Valley, returning Sat, Mar 28, priced at $334 found 12 hours ago
Alaska Airlines
Tue, Sep 1 - Wed, Sep 2
BWI
Baltimore
SUN
Sun Valley
$341 Roundtrip, found 1 day ago
$341
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Sep 1 from Baltimore to Sun Valley, returning Wed, Sep 2, priced at $341 found 1 day ago
Delta
Mon, Mar 23 - Tue, Mar 31
BWI
Baltimore
SUN
Sun Valley
$346 Roundtrip, found 3 days ago
$346
Roundtrip
found 3 days ago
Select Delta flight, departing Mon, Mar 23 from Baltimore to Sun Valley, returning Tue, Mar 31, priced at $346 found 3 days ago
American Airlines
Sat, Mar 21 - Sat, Mar 28
BWI
Baltimore
SUN
Sun Valley
$350 Roundtrip, found 12 hours ago
$350
Roundtrip
found 12 hours ago
Select American Airlines flight, departing Sat, Mar 21 from Baltimore to Sun Valley, returning Sat, Mar 28, priced at $350 found 12 hours ago
Delta
Mon, May 11 - Sat, May 16
BWI
Baltimore
SUN
Sun Valley
$359 Roundtrip, found 9 hours ago
$359
Roundtrip
found 9 hours ago
Select Delta flight, departing Mon, May 11 from Baltimore to Sun Valley, returning Sat, May 16, priced at $359 found 9 hours ago
United
Wed, Mar 25 - Mon, Mar 30
BWI
Baltimore
SUN
Sun Valley
$373 Roundtrip, found 5 days ago
$373
Roundtrip
found 5 days ago
Select United flight, departing Wed, Mar 25 from Baltimore to Sun Valley, returning Mon, Mar 30, priced at $373 found 5 days ago
Alaska Airlines
Sat, Mar 21 - Sat, Mar 28
BWI
Baltimore
SUN
Sun Valley
$376 Roundtrip, found 12 hours ago
$376
Roundtrip
found 12 hours ago
Select Alaska Airlines flight, departing Sat, Mar 21 from Baltimore to Sun Valley, returning Sat, Mar 28, priced at $376 found 12 hours ago
Delta
Sat, Mar 21 - Sat, Mar 28
BWI
Baltimore
SUN
Sun Valley
$381 Roundtrip, found 12 hours ago
$381
Roundtrip
found 12 hours ago
Select Delta flight, departing Sat, Mar 21 from Baltimore to Sun Valley, returning Sat, Mar 28, priced at $381 found 12 hours ago
United
Sat, Mar 21 - Sat, Mar 28
BWI
Baltimore
SUN
Sun Valley
$393 Roundtrip, found 12 hours ago
$393
Roundtrip
found 12 hours ago
Select United flight, departing Sat, Mar 21 from Baltimore to Sun Valley, returning Sat, Mar 28, priced at $393 found 12 hours ago
Delta
Sat, Apr 11 - Sat, Apr 18
BWI
Baltimore
SUN
Sun Valley
$394 Roundtrip, found 8 hours ago
$394
Roundtrip
found 8 hours ago
Select Delta flight, departing Sat, Apr 11 from Baltimore to Sun Valley, returning Sat, Apr 18, priced at $394 found 8 hours ago

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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 $837
SUN
Friedman Memorial
CheapestClosest
Average driving time to city center23 min
Flights from $837

Frequently asked questions

How much does a flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Friedman Memorial Airport (SUN) cost?
Snag a cheap one-way flight from $171 or cheap return flight from $334 from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Friedman Memorial Airport (SUN) 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 Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Friedman Memorial Airport (SUN)?
March is the least expensive month to fly from BWI to SUN. Timing your trip outside of the busy season is often the key to landing a great deal.
What is the cheapest airline that flies from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Friedman Memorial Airport (SUN)?
To find the cheapest airline flying from BWI to SUN, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Friedman Memorial Airport (SUN)?
Nonstop flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) 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 dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from BWI to SUN?
Generally you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* However, this can vary depending on the season, airline 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 Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Friedman Memorial Airport (SUN)?
To avoid possible delays on the Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Friedman Memorial Airport (SUN) route, aim to fly before 3 PM. Later flights have a 22% higher chance of cancellation.**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 Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Friedman Memorial Airport (SUN) last-minute?
Booking your flight from BWI to SUN right before your trip is typically more expensive. However, if there's some wiggle room with your departure times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a BWI to SUN flight and hotel package?
Compared with arranging flights and hotels separately, booking a BWI to SUN flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one easy place will take the stress out of planning your trip. Simply secure your flights and select from our wide range of hotels, then tailor your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Friedman Memorial Airport (SUN)?
In most instances, you're able to reschedule or cancel your BWI to SUN flight. However, additional fees may apply, especially if you booked over 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you'd like further details, visit our Customer Service portal.

Travel information

Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Friedman Memorial
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$333
Distance
1957 mi

Book with confidence

Baltimore to Sun Valley Flights

The cheapest times to fly from Baltimore 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 Baltimore to Sun Valley are during the month of March. You can find some of the cheapest flights from Baltimore to Sun Valley with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Baltimore to Sun Valley

Sunday is one of the best days to book for cheap flights from Baltimore 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 Baltimore 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 Baltimore to Sun Valley in 2026. You can also book with separate airlines for your outbound and return journeys, from $171 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 Baltimore 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 Baltimore 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.

 

Baltimore to Sun Valley Flights

*Flight schedules are subject to change.

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