$513 Cheap Flights from Washington (IAD) to Twin Falls (TWF)

View $513 flight on Wed, Oct 1, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Twin Falls, ID (TWF)

Cheap Flights from Washington to Twin Falls (IAD-TWF)

Prices were available within the past 7 days and start at $513 for one-way flights and $472 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Oct 21 - Sat, Oct 25
IAD
Washington
TWF
Twin Falls
$472 Roundtrip, found 5 days ago
$472
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Oct 21 from Washington to Twin Falls, returning Sat, Oct 25, priced at $472 found 5 days ago
Delta
Tue, Oct 21 - Mon, Oct 27
IAD
Washington
TWF
Twin Falls
$477 Roundtrip, found 5 days ago
$477
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Oct 21 from Washington to Twin Falls, returning Mon, Oct 27, priced at $477 found 5 days ago
Delta
Sat, Oct 18 - Tue, Oct 21
IAD
Washington
TWF
Twin Falls
$483 Roundtrip, found 5 days ago
$483
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Oct 18 from Washington to Twin Falls, returning Tue, Oct 21, priced at $483 found 5 days ago
Delta
Sat, Oct 18 - Sat, Oct 25
IAD
Washington
TWF
Twin Falls
$488 Roundtrip, found 5 days ago
$488
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Oct 18 from Washington to Twin Falls, returning Sat, Oct 25, priced at $488 found 5 days ago
Delta
Sat, Oct 18 - Fri, Oct 24
IAD
Washington
TWF
Twin Falls
$493 Roundtrip, found 5 days ago
$493
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Oct 18 from Washington to Twin Falls, returning Fri, Oct 24, priced at $493 found 5 days ago
Delta
Sat, Sep 13 - Fri, Sep 19
IAD
Washington
TWF
Twin Falls
$503 Roundtrip, found 4 days ago
$503
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, Sep 13 from Washington to Twin Falls, returning Fri, Sep 19, priced at $503 found 4 days ago
Delta
Fri, Oct 17 - Tue, Oct 21
IAD
Washington
TWF
Twin Falls
$507 Roundtrip, found 5 days ago
$507
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Oct 17 from Washington to Twin Falls, returning Tue, Oct 21, priced at $507 found 5 days ago
Delta
Fri, Oct 17 - Sat, Oct 25
IAD
Washington
TWF
Twin Falls
$512 Roundtrip, found 5 days ago
$512
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Oct 17 from Washington to Twin Falls, returning Sat, Oct 25, priced at $512 found 5 days ago
Delta
Fri, Oct 17 - Fri, Oct 24
IAD
Washington
TWF
Twin Falls
$517 Roundtrip, found 5 days ago
$517
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Oct 17 from Washington to Twin Falls, returning Fri, Oct 24, priced at $517 found 5 days ago
Delta
Tue, Oct 21 - Sun, Oct 26
IAD
Washington
TWF
Twin Falls
$522 Roundtrip, found 5 days ago
$522
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Oct 21 from Washington to Twin Falls, returning Sun, Oct 26, priced at $522 found 5 days ago
Flights from Washington (IAD) to Twin Falls (TWF)
Origin airport
Washington Dulles Intl.
Destination airport
Twin Falls
Roundtrip price
$471
Distance
1939 mi

Washington to Twin Falls Flights

The cheapest times to fly from Washington to Twin Falls

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

 

The best time to book a flight from Washington to Twin Falls

Sunday is one of the best days to book for cheap flights from Washington to Twin Falls: 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 Washington to Twin Falls

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 Washington to Twin Falls in 2025. You can also book with separate airlines for your outbound and return journeys, from $513 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 Washington to Twin Falls 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 Washington to Twin Falls 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 Washington Dulles Intl. Airport (IAD) to Twin Falls Airport (TWF) cost?
Secure a cheap one-way flight from $513 or cheap return flight from $472 from Washington Dulles Intl. Airport (IAD) to Twin Falls Airport (TWF) 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 Washington Dulles Intl. Airport (IAD) to Twin Falls Airport (TWF)?
The cheapest month to fly from IAD to TWF is October, when demand is low. Off-peak months are typically when better flight deals are available between these airports.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Twin Falls Airport (TWF)?
To find the cheapest airline flying from IAD to TWF, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Twin Falls Airport (TWF)?
There are no daily nonstop flights from Washington Dulles Intl. Airport (IAD) to Twin Falls Airport (TWF). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way in no time.
What day of the week has the most flights from IAD to TWF?
Usually you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can change based on the airline, time of year 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 Washington Dulles Intl. Airport (IAD) to Twin Falls Airport (TWF)?
To land at Twin Falls Airport (TWF) without delays, opt for a flight that takes off from Washington Dulles Intl. Airport (IAD) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Washington Dulles Intl. Airport (IAD) to Twin Falls Airport (TWF) last-minute?
Waiting until just before your trip to book your flight from IAD to TWF generally means paying more. While you may come across some last-minute discounts, there's no guarantee. Keep your travel schedule open to boost your chances of scoring a bargain.
Is it cheaper to book an IAD to TWF flight and hotel package?
Compared with arranging flights and hotels separately, booking an IAD to TWF flight and hotel package with Expedia could result in significant savings. Better still, managing everything in one place will take the stress out of travel planning. Simply secure your flights and select from our wide range of hotels, then customize your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Twin Falls Airport (TWF)?
In most instances, you can modify or cancel your IAD to TWF flight. However, there may be additional fees, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you need further details, visit our Customer Service portal.

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*Available to One Key members.