$149 Cheap Flights from Washington (IAD) to Pasco (PSC)

View $149 flight on Sat, May 2, 2026Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC)

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Cheap Flights from Washington to Pasco (IAD-PSC)

Prices were available within the past 7 days and start at $149 for one-way flights and $227 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, May 2 - Sat, May 9
IAD
Washington
PSC
Pasco
$227 Roundtrip, found 5 days ago
$227
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Sat, May 2 from Washington to Pasco, returning Sat, May 9, priced at $227 found 5 days ago
Alaska Airlines
Sat, May 2 - Sat, May 9
IAD
Washington
PSC
Pasco
$252 Roundtrip, found 5 days ago
$252
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Sat, May 2 from Washington to Pasco, returning Sat, May 9, priced at $252 found 5 days ago
Alaska Airlines
Tue, Apr 28 - Mon, May 4
IAD
Washington
PSC
Pasco
$276 Roundtrip, found 5 days ago
$276
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Apr 28 from Washington to Pasco, returning Mon, May 4, priced at $276 found 5 days ago
Alaska Airlines
Tue, Apr 28 - Mon, May 4
IAD
Washington
PSC
Pasco
$286 Roundtrip, found 5 days ago
$286
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Apr 28 from Washington to Pasco, returning Mon, May 4, priced at $286 found 5 days ago
Alaska Airlines
Mon, May 4 - Sun, May 10
IAD
Washington
PSC
Pasco
$292 Roundtrip, found 4 days ago
$292
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Mon, May 4 from Washington to Pasco, returning Sun, May 10, priced at $292 found 4 days ago
Alaska Airlines
Sat, May 2 - Sat, May 9
IAD
Washington
PSC
Pasco
$297 Roundtrip, found 15 hours ago
$297
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Sat, May 2 from Washington to Pasco, returning Sat, May 9, priced at $297 found 15 hours ago
Alaska Airlines
Tue, Apr 28 - Mon, May 4
IAD
Washington
PSC
Pasco
$301 Roundtrip, found 5 days ago
$301
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Apr 28 from Washington to Pasco, returning Mon, May 4, priced at $301 found 5 days ago
Delta
Fri, May 8 - Tue, May 12
IAD
Washington
PSC
Pasco
$307 Roundtrip, found 7 hours ago
$307
Roundtrip
found 7 hours ago
Select Delta flight, departing Fri, May 8 from Washington to Pasco, returning Tue, May 12, priced at $307 found 7 hours ago
United
Wed, May 6 - Sat, May 9
IAD
Washington
PSC
Pasco
$317 Roundtrip, found 5 days ago
$317
Roundtrip
found 5 days ago
Select United flight, departing Wed, May 6 from Washington to Pasco, returning Sat, May 9, priced at $317 found 5 days ago
American Airlines
Fri, Jul 3 - Tue, Jul 7
IAD
Washington
PSC
Pasco
$522 Roundtrip, found 3 days ago
$522
Roundtrip
found 3 days ago
Select American Airlines flight, departing Fri, Jul 3 from Washington to Pasco, returning Tue, Jul 7, priced at $522 found 3 days ago

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Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC) cost?
Secure a cheap one-way flight from $149 or cheap return flight from $227 from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC)?
Flying in May can help you save, as it's the cheapest month for flights between IAD and PSC. You'll typically find the lowest fares during the off-season.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC)?
To find the cheapest airline flying from IAD to PSC, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC)?
You'll need to book a flight with a layover when traveling from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from IAD to PSC?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* However, this can vary based on the time of year, carrier 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 Tri-Cities Airport (PSC)?
Choose a flight from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC) that leaves before 3 PM to reduce the risk of cancellations and delays. Later departures are on average 22% more likely to be canceled.**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 Tri-Cities Airport (PSC) last-minute?
Holding off until right before your break to book a ticket from IAD to PSC generally means paying more. While you might find some last-minute discounts, they aren't always guaranteed. Allow some flexibility in your schedule for a better chance of getting a bargain.
Is it cheaper to book an IAD to PSC flight and hotel package?
You'll generally save money by booking an IAD to PSC flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. Once you've selected your ideal accommodations and flights, consider adding extras like car rentals, tours and activities.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC)?
If you booked your IAD to PSC flight in the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Tri-Cities
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$226
Distance
2151 mi

Book with confidence

Washington to Pasco Flights

The cheapest times to fly from Washington to Pasco

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

 

The best time to book a flight from Washington to Pasco

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

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 Pasco in 2026. You can also book with separate airlines for your outbound and return journeys, from $149 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 Pasco 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 Pasco 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.

 

Washington to Pasco Flights

*Flight schedules are subject to change.

*Available to One Key members.