$185 Cheap Flights from Sun Valley (SUN) to Washington (DCA)

View $185 flight on Fri, May 8, 2026Opens in a new window

Popular airlines from Sun Valley, ID (SUN-Friedman Memorial) to Ronald Reagan Washington National Airport (DCA)

Cheap Flights from Sun Valley to Washington (SUN-DCA)

Prices were available within the past 7 days and start at $185 for one-way flights and $369 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, Feb 9 - Mon, Feb 15
SUN
Sun Valley
DCA
Washington
$369 Roundtrip, found 3 days ago
$369
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Tue, Feb 9 from Sun Valley to Washington, returning Mon, Feb 15, priced at $369 found 3 days ago
United
Tue, Feb 9 - Mon, Feb 15
SUN
Sun Valley
DCA
Washington
$369 Roundtrip, found 3 days ago
$369
Roundtrip
found 3 days ago
Select United flight, departing Tue, Feb 9 from Sun Valley to Washington, returning Mon, Feb 15, priced at $369 found 3 days ago
United
Wed, Jul 1 - Sat, Jul 4
SUN
Sun Valley
DCA
Washington
$393 Roundtrip, found 1 day ago
$393
Roundtrip
found 1 day ago
Select United flight, departing Wed, Jul 1 from Sun Valley to Washington, returning Sat, Jul 4, priced at $393 found 1 day ago
American Airlines
Tue, Feb 9 - Mon, Feb 15
SUN
Sun Valley
DCA
Washington
$394 Roundtrip, found 3 days ago
$394
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Feb 9 from Sun Valley to Washington, returning Mon, Feb 15, priced at $394 found 3 days ago
Alaska Airlines
Tue, Feb 9 - Mon, Feb 15
SUN
Sun Valley
DCA
Washington
$400 Roundtrip, found 3 days ago
$400
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Tue, Feb 9 from Sun Valley to Washington, returning Mon, Feb 15, priced at $400 found 3 days ago
United
Tue, Feb 9 - Mon, Feb 15
SUN
Sun Valley
DCA
Washington
$405 Roundtrip, found 3 days ago
$405
Roundtrip
found 3 days ago
Select United flight, departing Tue, Feb 9 from Sun Valley to Washington, returning Mon, Feb 15, priced at $405 found 3 days ago
Alaska Airlines
Sat, Oct 24 - Tue, Oct 27
SUN
Sun Valley
DCA
Washington
$409 Roundtrip, found 2 days ago
$409
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Oct 24 from Sun Valley to Washington, returning Tue, Oct 27, priced at $409 found 2 days ago
American Airlines
Tue, Feb 9 - Mon, Feb 15
SUN
Sun Valley
DCA
Washington
$434 Roundtrip, found 3 days ago
$434
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Feb 9 from Sun Valley to Washington, returning Mon, Feb 15, priced at $434 found 3 days ago
Alaska Airlines
Tue, Feb 9 - Mon, Feb 15
SUN
Sun Valley
DCA
Washington
$449 Roundtrip, found 3 days ago
$449
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Tue, Feb 9 from Sun Valley to Washington, returning Mon, Feb 15, priced at $449 found 3 days ago
Delta
Tue, Feb 9 - Mon, Feb 15
SUN
Sun Valley
DCA
Washington
$449 Roundtrip, found 3 days ago
$449
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Feb 9 from Sun Valley to Washington, returning Mon, Feb 15, priced at $449 found 3 days ago

Frequently asked questions

How much does a flight from Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National) cost?
You can find cheap one-way flights from $185 and cheap return flights from $369 Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National) with Expedia. One-way flights typically cost between $304 and $1520, and return flights often range between $482 and $2152. 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 Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National) 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 Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National)?
The cheapest month to fly from SUN to DCA is February 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 Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National)?
Enter SUN to DCA and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National)?
American Airlines is one of the cheapest airlines offering connecting flights from Sun Valley, ID (SUN) to Washington, DC (DCA), with round-trip tickets starting from around $516. 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 Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National)?
To find a cheap flight from Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National), 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 Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National)?
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 Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National)?
The earliest flight from Sun Valley (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National) typically departs at around 7:00 AM, operated by United. This flight is part of a seasonal service available in October, making it a convenient option for travelers heading to the capital. 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 Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National)?
The most popular departure times for flights from Sun Valley (SUN) to Washington, DC (DCA) are in the early morning, from 6am to 9am. About 61% of passengers prefer this time window. Many major carriers, including Delta Air Lines and American Airlines, offer flights during this window. This timing is favored because it lets you arrive in DC with plenty of time to enjoy your day.
How long does it take to fly from Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National)?
Flights from SUN to DCA with one stop typically take around 6 hours 30 minutes, covering approximately 1,948 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 Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National)?
Select the "Business class" and "First class" filters when looking for SUN to DCA flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National) flight with Expedia?
It's easy to earn miles on a Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National) 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 Washington from Friedman Memorial (SUN)?
From Friedman Memorial (SUN), you can fly into Washington Dulles Intl. (IAD) and Ronald Reagan Washington National (DCA) in Washington. Some flights may connect through major hubs like Denver Intl. (DEN), Seattle - Tacoma Intl. (SEA), Salt Lake City Intl. (SLC) before reaching Washington. 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 Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National) at the last minute?
Typically, booking a last minute flight from Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National) 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 Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National) flight and hotel package?
Securing a Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National) Washington Vacation Packages 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 Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National)?
If you booked your Sun Valley, ID (SUN-Friedman Memorial) to Washington, DC (DCA-Ronald Reagan Washington National) 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
Friedman Memorial
Destination airport
Ronald Reagan Washington National
Airlines serving
Alaska Airlines, Delta, United
Roundtrip price
$368
Distance
1947 mi

Book with confidence

Sun Valley to Washington Flights

The cheapest times to fly from Sun Valley to Washington

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

 

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

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

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 Sun Valley to Washington in 2026. You can also book with separate airlines for your outbound and return journeys, from $185 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 Sun Valley to Washington 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 Sun Valley to Washington 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.

 

Sun Valley to Washington Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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