$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 $341 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Mar 26 - Thu, Apr 2
BWI
Baltimore
SUN
Sun Valley
$341 Roundtrip, found 19 hours ago
$341
Roundtrip
found 19 hours ago
Select United flight, departing Thu, Mar 26 from Baltimore to Sun Valley, returning Thu, Apr 2, priced at $341 found 19 hours ago
Delta
Sat, May 30 - Sat, Jun 6
BWI
Baltimore
SUN
Sun Valley
$344 Roundtrip, found 4 days ago
$344
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, May 30 from Baltimore to Sun Valley, returning Sat, Jun 6, priced at $344 found 4 days ago
Delta
Mon, Mar 23 - Tue, Mar 31
BWI
Baltimore
SUN
Sun Valley
$346 Roundtrip, found 19 hours ago
$346
Roundtrip
found 19 hours ago
Select Delta flight, departing Mon, Mar 23 from Baltimore to Sun Valley, returning Tue, Mar 31, priced at $346 found 19 hours ago
Delta
Tue, Mar 24 - Tue, Mar 31
BWI
Baltimore
SUN
Sun Valley
$349 Roundtrip, found 4 days ago
$349
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Mar 24 from Baltimore to Sun Valley, returning Tue, Mar 31, priced at $349 found 4 days ago
Alaska Airlines
Tue, Jan 5 - Sun, Jan 10
BWI
Baltimore
SUN
Sun Valley
$370 Roundtrip, found 5 days ago
$370
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Jan 5 from Baltimore to Sun Valley, returning Sun, Jan 10, priced at $370 found 5 days ago
United
Wed, Mar 25 - Mon, Mar 30
BWI
Baltimore
SUN
Sun Valley
$373 Roundtrip, found 2 days ago
$373
Roundtrip
found 2 days ago
Select United flight, departing Wed, Mar 25 from Baltimore to Sun Valley, returning Mon, Mar 30, priced at $373 found 2 days ago
Delta
Sat, May 30 - Sat, Jun 6
BWI
Baltimore
SUN
Sun Valley
$379 Roundtrip, found 4 days ago
$379
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, May 30 from Baltimore to Sun Valley, returning Sat, Jun 6, priced at $379 found 4 days ago
Delta
Wed, Mar 25 - Mon, Mar 30
BWI
Baltimore
SUN
Sun Valley
$386 Roundtrip, found 2 days ago
$386
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Mar 25 from Baltimore to Sun Valley, returning Mon, Mar 30, priced at $386 found 2 days ago
United
Mon, Mar 16 - Tue, Mar 24
BWI
Baltimore
SUN
Sun Valley
$399 Roundtrip, found 6 days ago
$399
Roundtrip
found 6 days ago
Select United flight, departing Mon, Mar 16 from Baltimore to Sun Valley, returning Tue, Mar 24, priced at $399 found 6 days ago
American Airlines
Wed, Mar 25 - Mon, Mar 30
BWI
Baltimore
SUN
Sun Valley
$419 Roundtrip, found 2 days ago
$419
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Mar 25 from Baltimore to Sun Valley, returning Mon, Mar 30, priced at $419 found 2 days 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 $419
SUN
Friedman Memorial
CheapestClosest
Average driving time to city center23 min
Flights from $419

Frequently asked questions

How much does a flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial) cost?
You can find cheap one-way flights from $171 and cheap return flights from $341 Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial) with Expedia. One-way flights usually range from $479 to $1771, and return flights typically cost between $461 and $1617. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial)?
The cheapest month to fly from BWI to SUN is March when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial)?
Enter BWI to SUN and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial)?
American Airlines is one of the cheapest airlines offering connecting flights from Baltimore, MD (BWI) to Sun Valley, ID (SUN), with round-trip tickets starting from around $345.56 with a layover in Charlotte-Douglas Intl. (CLT). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial)?
To find a cheap flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial)?
The earliest flight from Baltimore Washington International Thurgood Marshall Airport (BWI) to Friedman Memorial Airport (SUN) in Sun Valley typically departs at around 5:00 AM, operated by American Airlines. An early departure like this allows you to enjoy a full day in Sun Valley upon arrival. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial)?
For flights from Baltimore (BWI) to Sun Valley (SUN), the most popular departure times are in the early morning, from 6am to 9am. About 74% of passengers prefer this time window. Many major carriers, including United Airlines and Delta, offer flights during this window. This timing is favored as it allows travelers to arrive in Sun Valley with plenty of time to enjoy the day.
How long does it take to fly from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial)?
A flight from BWI to SUN with a layover takes around 7 hours 20 minutes, with the route covering approximately 1,958 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial)?
You can fly first class between BWI and SUN. First class cabins are available on:

  • American Airlines
  • Delta Air Lines
  • United Airlines

How do I earn miles on a Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial) flight with Expedia?
It's easy to earn miles on a Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Sun Valley from Baltimore Washington Intl. Thurgood Marshall (BWI)?
From Baltimore Washington Intl. Thurgood Marshall (BWI), you can fly into Friedman Memorial (SUN) to reach Sun Valley. Some flights may connect through major hubs like O'Hare Intl. (ORD), Denver Intl. (DEN), Seattle - Tacoma Intl. (SEA) before reaching Sun Valley. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial) at the last minute?
Typically, booking a last minute flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial) flight and hotel package?
Securing a Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial)?
If you booked your Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Sun Valley, ID (SUN-Friedman Memorial) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Friedman Memorial
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$340
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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*Available to One Key members.