A modern airport control tower with a spherical top and a curved, white-roofed building in the foreground.

CA $294 Cheap Flights from Portland (PDX) to Washington (IAD)

View CA $294 flight on Mon, Sep 28, 2026Opens in a new window

Popular airlines from Portland International Airport (PDX) to Washington Dulles International Airport (IAD)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap flights from Portland (PDX) to Washington (IAD)

Prices were available within the past 7 days and start at CA $294 for one-way flights and CA $588 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Sep 29 - Wed, Oct 7
PDX
Portland
IAD
Washington
CA $588 Roundtrip, found 4 days ago
CA $588
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Sep 29 from Portland to Washington, returning Wed, Oct 7, priced at CA $588 found 4 days ago
Alaska Airlines
Tue, Oct 6 - Wed, Oct 14
PDX
Portland
IAD
Washington
CA $588 Roundtrip, found 3 days ago
CA $588
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Tue, Oct 6 from Portland to Washington, returning Wed, Oct 14, priced at CA $588 found 3 days ago
Delta
Thu, Oct 1 - Mon, Oct 5
PDX
Portland
IAD
Washington
CA $588 Roundtrip, found 5 days ago
CA $588
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Oct 1 from Portland to Washington, returning Mon, Oct 5, priced at CA $588 found 5 days ago
American Airlines
Wed, Sep 23 - Sun, Sep 27
PDX
Portland
IAD
Washington
CA $602 Roundtrip, found 4 days ago
CA $602
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Sep 23 from Portland to Washington, returning Sun, Sep 27, priced at CA $602 found 4 days ago
American Airlines
Thu, Sep 17 - Mon, Sep 21
PDX
Portland
IAD
Washington
CA $612 Roundtrip, found 2 days ago
CA $612
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, Sep 17 from Portland to Washington, returning Mon, Sep 21, priced at CA $612 found 2 days ago
Delta
Wed, Sep 23 - Sun, Sep 27
PDX
Portland
IAD
Washington
CA $615 Roundtrip, found 4 days ago
CA $615
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Sep 23 from Portland to Washington, returning Sun, Sep 27, priced at CA $615 found 4 days ago
Delta
Thu, Sep 17 - Sun, Sep 20
PDX
Portland
IAD
Washington
CA $616 Roundtrip, found 4 days ago
CA $616
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, Sep 17 from Portland to Washington, returning Sun, Sep 20, priced at CA $616 found 4 days ago
Delta
Thu, Oct 8 - Thu, Oct 15
PDX
Portland
IAD
Washington
CA $617 Roundtrip, found 2 days ago
CA $617
Roundtrip
found 2 days ago
Select Delta flight, departing Thu, Oct 8 from Portland to Washington, returning Thu, Oct 15, priced at CA $617 found 2 days ago
Delta
Thu, Sep 17 - Mon, Sep 21
PDX
Portland
IAD
Washington
CA $618 Roundtrip, found 2 days ago
CA $618
Roundtrip
found 2 days ago
Select Delta flight, departing Thu, Sep 17 from Portland to Washington, returning Mon, Sep 21, priced at CA $618 found 2 days ago
American Airlines
Tue, Sep 29 - Wed, Oct 7
PDX
Portland
IAD
Washington
CA $634 Roundtrip, found 4 days ago
CA $634
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Sep 29 from Portland to Washington, returning Wed, Oct 7, priced at CA $634 found 4 days ago

Frequently asked questions

How much does a flight from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.) cost?
You can find cheap one-way flights from CA $294 and cheap return flights from CA $588 PDX to IAD with Expedia. One-way flights typically cost between CA$350 and CA$1268. 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 PDX to IAD ticket fares go up or down.
What is the cheapest month to fly from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The cheapest months to fly from PDX to IAD are typically during off-peak season 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 are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Only one airline offers direct flights from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.). United operates 11 direct flights from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.) every week.
What is the cheapest airline that flies from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
United is one of the cheapest airlines offering nonstop return flights from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.), with tickets starting from around CA$354 for flights that can be booked for departure within the next year. Sun Country Airlines offers one of the cheapest connecting return flights on this route, with tickets starting from around CA$607. These prices are per adult, for economy/coach class. 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.
How do I find cheap flights from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
To find a cheap flight from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.), 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 airline to fly with from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The best airline to fly with from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.) will differ from traveler to traveler. If you like to fly early, United offers early morning flights. If price is the most important factor, United typically offers the lowest fares. Alaska Airlines offers the most daily flights from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
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.
How many flights per day from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
You'll find approximately 2 nonstop flights per day from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.). For even more choices, look at flights that include layovers, as there are around 75 connecting flights per day. Some common connection points include Seattle - Tacoma Intl. (SEA), San Francisco Intl. (SFO), and Denver Intl. (DEN).
What is the earliest flight from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.) typically departs around 12:05 AM local time. This flight is operated by American Airlines. This is a seasonal service active in June. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
You'll typically find the most flights from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.) on a Tuesday, with around 66 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Alaska Airlines, United, and Delta. Flight schedules are quite consistent throughout the week, so you'll have plenty of choices no matter which day you choose to fly.
What are the most popular departure times for flights from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The most popular departure times for flights from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.) are in the early morning, from 6am to 9am. Many major carriers, including United, Alaska Airlines and Delta, offer flights during this window. Many travelers prefer this because it allows for an early arrival at your destination, giving you more time to settle in or start your day.
How long does it take to fly from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
A non-stop flight from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.) typically takes around 5 hours, covering a distance of approximately 3,735 kilometres. If you opt for a one-stop flight, your travel time will be longer, usually around 7 hours 30 minutes, including the layover. Flights with two or more stops generally take about 13 hours 20 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.
Can you fly business or first class from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Yes, you can fly business class or first class between PDX and IAD. Airlines that offer business class service on this route include:
  • Frontier Airlines
  • Delta
First class cabins are available on:
  • Alaska Airlines
  • United
  • Delta
  • American Airlines
How do I earn miles on a Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight with Expedia?
It's easy to earn miles on a Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.) 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, DC (IAD) from Portland, OR (PDX)?
If you're planning to travel to Washington from Portland Intl. (PDX), you can fly directly into Washington Dulles Intl. (IAD). Some flights may connect through major hubs like San Francisco Intl. (SFO), Spokane Intl. (GEG), or Boise, ID (BOI) 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 Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.) at the last minute?
Typically, booking a last minute flight from Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.) 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 Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package?
Securing a Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.) 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 Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
If you booked your Portland, OR (PDX-Portland Intl.) to Washington, DC (IAD-Washington Dulles Intl.) 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
Portland Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Alaska Airlines, Delta
Roundtrip price
CA $588
Distance
3713 km
Average flight time
5 hours 1 min

Book with confidence

Portland to Chantilly Flights

The easy way to book your flights from Portland to Washington 

With Expedia, it’s simple to find and book flights to Washington from Portland whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Washington Dulles Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Portland to Washington today, tomorrow, or this week.  

 

Save dollars with cheap flights from Portland Intl., PDX to Washington Dulles Intl., IAD 

Sort your search results by price to find great deals on your flight from Portland to Washington—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Washington from Portland currently is just CA $588 rising to CA $634.  

Here are more money-saving tips: 

  • Fly in September when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Washington  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Washington from Portland 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Washington with Expedia today.

Portland to Chantilly Flights

Explore a world of travel with Expedia

*Available to Expedia members.