Title: $149 Cheap flights from Washington to Pasco (IAD to PSC) - Expedia.com

![blue bridge over Columbia river in Tri-cities Washington state](https://images.trvl-media.com/place/2878/9049bec3-53f1-48e4-9f2a-258938982d2f.jpg?impolicy=fcrop&w=1200&h=500&q=medium)

![](https://images.trvl-media.com/place/2878/9049bec3-53f1-48e4-9f2a-258938982d2f.jpg?impolicy=fcrop&w=1200&h=500&q=medium)

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

[View $149 flight on Tue, Mar 17, 2026](https://expedia.com/Flights-Search?trip=oneway&leg1=from:IAD,to:PSC,departure:3/17/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:148.20&airProductToken=AQpuCjUIxJgBEgQzNzgzGIgYIMx8KIfxhwMwufKHAzhFQABYAWoJTUFJTkJBU0lDcghWQVZTSDNCQwo1CMSYARIEMzkzNxjMfCDPFCi784cDMJD1hwM4RUABWAFqCU1BSU5CQVNJQ3IIVkFWU0gzQkMSCggBEAEYASoCREwYASIECAEQASgCKAMoBDAB) 

- [Roundtrip](?flightType=roundtrip)
- [One-way](?flightType=oneway)
- [Multi-city](?flightType=multicity)

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

- ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg)  
Alaska Airlines  
[](https://www.expedia.com/Flights-Search?leg1=from:IAD,to:PSC,departure:3/4/2026TANYT&leg2=from:PSC,to:IAD,departure:3/11/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}])
- ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg)  
Delta  
[](https://www.expedia.com/Flights-Search?leg1=from:IAD,to:PSC,departure:3/4/2026TANYT&leg2=from:PSC,to:IAD,departure:3/11/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}])
- ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg)  
United  
[](https://www.expedia.com/Flights-Search?leg1=from:IAD,to:PSC,departure:3/4/2026TANYT&leg2=from:PSC,to:IAD,departure:3/11/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}])
- ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg)  
American Airlines  
[](https://www.expedia.com/Flights-Search?leg1=from:IAD,to:PSC,departure:3/4/2026TANYT&leg2=from:PSC,to:IAD,departure:3/11/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}])

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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 $297 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

All deals

One way

Roundtrip

![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif)

Tue, Apr 28 - Sat, May 9

IAD

Washington

PSC

Pasco

$297

Roundtrip

found 2 days ago

[](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:PSC,departure:4/28/2026TANYT&leg2=from:PSC,to:IAD,departure:5/9/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:296.40&airProductToken=AQpDCh8IwaYBEgMzNzUYiBggkgEojMeLAzDnyYsDOFhAAFgBCiAIwaYBEgQzMzUzGJIBIM8UKJLLiwMw0suLAzhYQAFYAQpDCiAIwaYBEgQyMDMwGM8UIJIBKKXGjAMw5caMAzhYQABYAQofCMGmARIDMzQ4GJIBIIgYKL_HjAMw-cmMAzhYQAFYARIKCAEQARgBKgJBUxgBIgQIARABKAQwAQ)

![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif)

Wed, Apr 22 - Sat, May 9

IAD

Washington

PSC

Pasco

$297

Roundtrip

found 2 days ago

[](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:PSC,departure:4/22/2026TANYT&leg2=from:PSC,to:IAD,departure:5/9/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:296.40&airProductToken=AQpECiAIxJgBEgQxMDE1GIgYIJIBKNSCiwMwtoWLAzhFQABYAQogCMSYARIEMzk5MhiSASDPFCjkhYsDMKiGiwM4RUABWAEKQwogCMSYARIEMzk1OBjPFCDyEijoxYwDMNLGjAM4RUAAWAEKHwjEmAESAzg0NxjyEiCIGCjnx4wDMNTJjAM4RUABWAESCggBEAEYASoCREwYASIECAEQASgEMAE)

![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif)

Tue, Apr 28 - Tue, May 5

IAD

Washington

PSC

Pasco

$328

Roundtrip

found 2 hours ago

[](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:PSC,departure:4/28/2026TANYT&leg2=from:PSC,to:IAD,departure:5/5/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:327.41&airProductToken=AQpfCi0IwaYBEgMzNzUYiBggkgEojMeLAzDnyYsDOFhAAFgBagJTVnIIT0gyT1hKQk4KLgjBpgESBDMzNTMYkgEgzxQoksuLAzDSy4sDOFhAAVgBagJTVnIIT0gyT1hKQk4KXwouCMGmARIEMjAzMBjPFCCSASilmYwDMOWZjAM4WEAAWAFqAlNWcghRSDJPWEpCTgotCMGmARIDMzQ4GJIBIIgYKL-ajAMw-ZyMAzhYQAFYAWoCU1ZyCFFIMk9YSkJOEgoIARABGAEqAkFTGAEiBAgBEAEoAigDKAQwAQ)

![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif)

Tue, Mar 17 - Tue, Mar 31

IAD

Washington

PSC

Pasco

$330

Roundtrip

found 2 days ago

[](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:PSC,departure:3/17/2026TANYT&leg2=from:PSC,to:IAD,departure:3/31/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:329.41&airProductToken=AQpECiAIxJgBEgQxMDE1GIgYIJIBKNTthwMwv_CHAzhFQABYAQogCMSYARIEMzk5MhiSASDPFCjf8IcDMKHxhwM4RUABWAEKQwogCMSYARIENDAyMxjPFCCSASjDkYkDMIqSiQM4RUAAWAEKHwjEmAESAzU0MRiSASCIGCj_m4kDMKWeiQM4RUABWAESCggBEAEYASoCREwYASIECAEQASgEMAE)

![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif)

Sat, May 2 - Tue, May 12

IAD

Washington

PSC

Pasco

$332

Roundtrip

found 4 days ago

[](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:PSC,departure:5/2/2026TANYT&leg2=from:PSC,to:IAD,departure:5/12/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:331.40&airProductToken=AQplCjAIwaYBEgMzNzUYiBggkgEojPSLAzDn9osDOFhAAFgBagVTQVZFUnIIUUgyT1hVQk4KMQjBpgESBDMzNTMYkgEgzxQokviLAzDS-IsDOFhAAVgBagVTQVZFUnIIUUgyT1hVQk4SCggBEAEYASoCQVMYASIECAEQASgCKAMoBDAN)

![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif)

Tue, May 12 - Tue, May 26

IAD

Washington

PSC

Pasco

$339

Roundtrip

found 2 days ago

[](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:PSC,departure:5/12/2026TANYT&leg2=from:PSC,to:IAD,departure:5/26/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:338.40&airProductToken=AQpECiAIxJgBEgQxMDE1GIgYIJIBKN7jjAMwuOaMAzhFQABYAQogCMSYARIEMzk1NRiSASDPFCiT6IwDMN7ojAM4RUABWAEKQwogCMSYARIEMzk5MhjPFCCSASiRhY4DMN2FjgM4RUAAWAEKHwjEmAESAzU0MRiSASCIGCjaho4DMI-JjgM4RUABWAESCggBEAEYASoCREwYASIECAEQASgEMAE)

![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif)

Thu, Apr 23 - Sat, May 9

IAD

Washington

PSC

Pasco

$340

Roundtrip

found 2 days ago

[](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:PSC,departure:4/23/2026TANYT&leg2=from:PSC,to:IAD,departure:5/9/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:339.40&airProductToken=AQpECiAIxJgBEgQxMDE1GIgYIJIBKPSNiwMw1pCLAzhFQABYAQogCMSYARIEMzg5MRiSASDPFCihk4sDMOWTiwM4RUABWAEKQwogCMSYARIEMzk1OBjPFCDyEijoxYwDMNLGjAM4RUAAWAEKHwjEmAESAzg0NxjyEiCIGCjnx4wDMNTJjAM4RUABWAESCggBEAEYASoCREwYASIECAEQASgEMAE)

![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif)

Sat, May 2 - Tue, May 12

IAD

Washington

PSC

Pasco

$347

Roundtrip

found 4 days ago

[](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:PSC,departure:5/2/2026TANYT&leg2=from:PSC,to:IAD,departure:5/12/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:346.40&airProductToken=AQpmCjEI1YIBEgQxMTI2GIgYIINpKN32iwMw1fiLAzhLQABYAWoFMl9lY29yCEtBSzJBUURTCjEI1YIBEgQxOTEzGINpIM8UKPD5iwMwifuLAzhLQABYAWoFMl9lY29yCEtBSzJBUURTEgoIARABGAEqAlVBGAEiBAgBEAEoAigDKAQwCw)

![Hawaiian Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/HA.gif)

Thu, Apr 2 - Mon, Apr 20

IAD

Washington

PSC

Pasco

$383

Roundtrip

found 2 days ago

[](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:PSC,departure:4/2/2026TANYT&leg2=from:PSC,to:IAD,departure:4/20/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:382.40&airProductToken=AQpECiAIyIIBEgQ0OTY3GIgYIJIBKNShiQMwtaSJAzhVQABYAQogCMiCARIENjg1OBiSASDPFCjCp4kDMIKoiQM4VUABWAEKRAogCMiCARIENjQ1MhjPFCCSASjn8ooDMK7zigM4VUAAWAEKIAjIggESBDY3MTgYkgEgiBgouPSKAzDk9ooDOFVAAVgBEgoIARABGAEqAkhBGAEiBAgBEAEoBDAB)

![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif)

Sat, Sep 12 - Fri, Sep 18

IAD

Washington

PSC

Pasco

$405

Roundtrip

found 6 days ago

[](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:PSC,departure:9/12/2026TANYT&leg2=from:PSC,to:IAD,departure:9/18/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:405.00&airProductToken=AQqcAQoxCMGCARIDNTI0GIgYIKOxASjUzZcDMJTPlwM4QkAAWAFqBUJBU0lDcghPVkFIVU5CWAozCMGCARIEMTIzMhijsQEg77kBKLfQlwMw1NGXAzhCQAFYAWoFQkFTSUNyCE9WQUhVTkJYCjIIwYIBEgQ1MDA2GO-5ASDPFCiI05cDMK_UlwM4QkABWAFqBUJBU0lDcghPVkFIVU5CWAqdAQoyCMGCARIENTAxMBjPFCDvuQEot5SYAzDVlZgDOEJAAFgBagVCQVNJQ3IIT1ZBSFpOQlgKMwjBggESBDI4MjEY77kBIOKaASi4l5gDMKaZmAM4QkABWAFqBUJBU0lDcghPVkFIWk5CWAoyCMGCARIENTMzOBjimgEgiBgojJuYAzDom5gDOEJAAVgBagVCQVNJQ3IIT1ZBSFpOQlgSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL)

![](https://forever.travel-assets.com/flex/flexmanager/images/2026/02/06/expedia-sale-2026-desktop-us-ca.jpg?impolicy=fcrop&w=1400&h=600&q=mediumHigh)

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## Alternative airports near Pasco

Prices were available within the past 7 days. Prices and availability are subject to change.

[](https://www.expedia.com/Flights-Search?leg1=from:IAD,to:PSC,departure:3/4/2026TANYT&leg2=from:PSC,to:IAD,departure:3/7/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE)

PSC

Tri-Cities

CheapestClosest

4 min

[Flights from $683

](https://www.expedia.com/Flights-Search?leg1=from:IAD,to:PSC,departure:3/4/2026TANYT&leg2=from:PSC,to:IAD,departure:3/7/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) 

## Frequently asked questions

### How much does a flight from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC) cost?

### What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC)?

### What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC)?

### How many flights per day from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC)?

### What day of the week has the most flights from IAD to PSC?

### What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC)?

### Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC) last-minute?

### Is it cheaper to book an IAD to PSC flight and hotel package?

### Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Tri-Cities Airport (PSC)?

## Travel information

| Origin airport      | Washington Dulles Intl.                           |
| ------------------- | ------------------------------------------------- |
| Destination airport | Tri-Cities                                        |
| Airlines serving    | Alaska Airlines, American Airlines, Delta, United |
| Roundtrip price     | $296                                              |
| 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 April. 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](https://www.expedia.com/package-deals). 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.

\*Flight schedules are subject to change.

## Explore a world of travel with Expedia

- Lodging
- Flights

- [Pasco Hotels ](https://www.expedia.com/Pasco-Hotels.d2878.Travel-Guide-Hotels)

- [Flights to Pasco ](https://www.expedia.com/Cheap-Flights-To-Pasco.d2878.Travel-Guide-Flights)
- [Phoenix to Pasco ](https://www.expedia.com/lp/flights/178298/2878/phoenix-to-pasco)
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\*Available to One Key members.