$159+ Cheap flights from Portland (PDX) to Dulles Intl (IAD)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — IAD
Oct 5 — Oct 121
Round-trip
1 adult, Economy
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Find cheap flights from Portland to Dulles Intl with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider ’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Portland to Washington, D.C. Dulles Intl are usually found in January or February, booked 81 days in advance, depart on a Thursday or Wednesday and return on a Wednesday
Cheap flight deals from Portland to Dulles Intl
Cheapest
Best
Last-minute
One-way
Cheapest flights from Portland to Dulles IntlExplore the most affordable flight options available from Portland to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 5, 2026.
Explore the most affordable flight options available from Portland to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 5, 2026.
This Super.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1212:25 pm -
1 stop14h 55m
Thu 10/226:00 am -
1 stop8h 26m
Deal found 9/3![Frontier logo]()
$324
This CheapOair deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2212:11 pm -
1 stop15h 09m
Mon 10/266:00 am -
1 stop8h 40m
Deal found 9/2![Frontier logo]()
$332
This CheapOair deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1912:25 pm -
1 stop14h 55m
Mon 10/266:00 am -
1 stop8h 40m
Deal found 9/2![Frontier logo]()
$340
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1612:29 pm -
1 stop7h 20m
Sun 10/257:05 am -
1 stop7h 44m
Deal found 9/4![Delta logo]()
$343
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:44 pm -
2 stops10h 28m
Sun 10/187:05 am -
1 stop7h 44m
Deal found 9/4![Delta logo]()
$348
This Expedia deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/812:11 pm -
1 stop15h 09m
Mon 10/126:00 am -
1 stop8h 40m
Deal found 9/1![Frontier logo]()
$351
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:44 pm -
2 stops12h 06m
Wed 10/2112:27 pm -
2 stops12h 29m
Deal found 9/4![Delta logo]()
$353
This Frontier deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2112:39 pm -
1 stop14h 41m
Sat 9/266:00 am -
1 stop8h 36m
Deal found 9/3![Frontier logo]()
$364
This Frontier deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1412:39 pm -
1 stop14h 41m
Sat 9/266:00 am -
1 stop8h 36m
Deal found 9/3![Frontier logo]()
$369
This Alaska Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/147:09 am -
1 stop13h 50m
Mon 10/197:02 am -
1 stop19h 00m
Deal found 9/5![Alaska Airlines logo]()
$373
This Trip.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:24 pm -
1 stop14h 56m
Mon 10/126:00 am -
1 stop8h 40m
Deal found 9/2![Frontier logo]()
$375
Best flights from Portland to Dulles IntlDiscover carefully curated flight deals from Portland to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 5, 2026.
Discover carefully curated flight deals from Portland to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 5, 2026.
This Delta deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:34 pm -
1 stop7h 22m
Wed 10/77:05 am -
1 stop7h 44m
Deal found 9/5![Delta logo]()
$343
This Alaska Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/115:00 am -
1 stop8h 26m
Sun 2/147:00 am -
1 stop8h 22m
Deal found 9/4![Alaska Airlines logo]()
$467
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/268:25 am -
Nonstop5h 02m
Mon 9/286:37 pm -
1 stop8h 57m
Deal found 9/2![United Airlines logo]()
$505
This Delta deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/512:34 pm -
1 stop7h 22m
Mon 10/127:05 am -
1 stop7h 44m
Deal found 9/5![Delta logo]()
$413
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/710:51 am -
1 stop8h 16m
Mon 10/125:30 pm -
Nonstop5h 40m
Deal found 9/2![United Airlines logo]()
$505
This Delta deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/252:15 pm -
1 stop7h 05m
Fri 11/276:00 am -
1 stop7h 47m
Deal found 9/3![Delta logo]()
$467
This Delta deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/111:38 pm -
1 stop7h 13m
Sun 2/1411:00 am -
1 stop11h 08m
Deal found 9/2![Delta logo]()
$467
This United Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3011:42 pm -
Nonstop4h 53m
Mon 1/45:33 pm -
Nonstop6h 04m
Deal found 9/5![United Airlines logo]()
$516
This Delta deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/410:00 pm -
1 stop10h 45m
Tue 10/612:30 pm -
1 stop11h 20m
Deal found 9/1![Delta logo]()
$467
This United Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/68:30 am -
Nonstop4h 52m
Sun 11/88:15 am -
1 stop9h 22m
Deal found 9/4![United Airlines logo]()
$525
This Delta deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:20 am -
1 stop8h 36m
Sun 10/47:00 am -
1 stop8h 15m
Deal found 9/3![Delta logo]()
$467
This United Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:27 pm -
1 stop7h 31m
Mon 10/125:30 pm -
Nonstop5h 40m
Deal found 9/5![United Airlines logo]()
$543
Last-minute flights from Portland to Dulles IntlDiscover last-minute flight deals from Portland to Dulles Intl. Data last updated September 5, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Dulles Intl. Data last updated September 5, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1412:39 pm -
1 stop14h 41m
Sat 9/266:00 am -
1 stop8h 36m
Deal found 9/3![Frontier logo]()
$369
This Frontier deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2112:39 pm -
1 stop14h 41m
Sat 9/266:00 am -
1 stop8h 36m
Deal found 9/3![Frontier logo]()
$364
This Trip.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:24 pm -
1 stop14h 56m
Mon 10/126:00 am -
1 stop8h 40m
Deal found 9/2![Frontier logo]()
$375
This Expedia deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/812:11 pm -
1 stop15h 09m
Mon 10/126:00 am -
1 stop8h 40m
Deal found 9/1![Frontier logo]()
$351
This Super.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1212:25 pm -
1 stop14h 55m
Thu 10/226:00 am -
1 stop8h 26m
Deal found 9/3![Frontier logo]()
$324
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:44 pm -
2 stops10h 28m
Sun 10/187:05 am -
1 stop7h 44m
Deal found 9/4![Delta logo]()
$348
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:44 pm -
2 stops12h 06m
Sat 10/1712:20 pm -
2 stops13h 22m
Deal found 9/4![Delta logo]()
$353
This Alaska Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/147:09 am -
1 stop13h 50m
Mon 10/197:02 am -
1 stop19h 00m
Deal found 9/5![Alaska Airlines logo]()
$373
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1612:29 pm -
1 stop7h 20m
Tue 10/277:05 am -
1 stop7h 44m
Deal found 9/4![Delta logo]()
$343
This CheapOair deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1912:25 pm -
1 stop14h 55m
Mon 10/266:00 am -
1 stop8h 40m
Deal found 9/2![Frontier logo]()
$340
This CheapOair deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2212:11 pm -
1 stop15h 09m
Mon 10/266:00 am -
1 stop8h 40m
Deal found 9/2![Frontier logo]()
$332
One-way flights from Portland to Dulles IntlSearch for one-way flight options from Portland to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 5, 2026.
Search for one-way flight options from Portland to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:38 pm -
3 stops26h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Multiple Airlines logo]()
$159
This Booking.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2812:39 pm -
1 stop14h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Frontier logo]()
$165
This CheapOair deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:11 pm -
1 stop15h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Frontier logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:02 pm -
2 stops26h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Frontier logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1012:02 pm -
2 stops32h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Frontier logo]()
$170
This Super.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/312:24 pm -
1 stop14h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1311:49 am -
2 stops19h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/511:02 am -
2 stops20h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Frontier logo]()
$176
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/412:38 pm -
2 stops18h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$177
Find flight deals from Portland to Dulles Intl
Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $324 (Super.com) |
One-way from | $159 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $475 |
Good round-trip deal | $477 or less |
Good one-way deal | $268 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Portland to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 5, 2026.
Use the filters below to find and compare flights from Portland to Washington, D.C. Dulles Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PortlandWashington, D.C.
PDX Portland - IAD Washington, D.C. Dulles Intl
PDXIAD
Portland
Sat 10/3
7:00 am-8:01 pm
1 stop10h 01m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$232
PortlandWashington, D.C.
PDX Portland - IAD Washington, D.C. Dulles Intl
PDXIAD
Portland
Mon 11/23
5:19 am-4:13 pm
1 stop7h 54m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$234
PortlandWashington, D.C.
PDX Portland - IAD Washington, D.C. Dulles Intl
PDXIAD
Portland
Sun 9/27
11:10 pm-10:21 am
1 stop8h 11m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$234
PortlandWashington, D.C.
PDX Portland - IAD Washington, D.C. Dulles Intl
PDXIAD
Portland
Tue 9/29
8:25 am-4:27 pm
Nonstop5h 02m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$279
PortlandWashington, D.C.
PDX Portland - IAD Washington, D.C. Dulles Intl
PDXIAD
Portland
Mon 10/5
8:25 am-4:27 pm
Nonstop5h 02m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$279
Quickest round-trip
PortlandWashington, D.C.
PDX Portland - IAD Washington, D.C. Dulles Intl
PDXIAD
Portland
Wed 9/23
8:25 am-4:26 pm
Nonstop5h 01m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$279
PortlandWashington, D.C.
PDX Portland - IAD Washington, D.C. Dulles Intl
PDXIAD
Portland
Fri 9/25
2:35 pm-5:40 am
2 stops12h 05m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$291
PortlandWashington, D.C.
PDX Portland - IAD Washington, D.C. Dulles Intl
PDXIAD
Portland
Thu 1/7
11:10 am-11:46 pm
2 stops9h 36m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$307
PortlandWashington, D.C.
PDX Portland - IAD Washington, D.C. Dulles Intl
PDXIAD
Portland
Sat 10/3
8:25 am-4:27 pm
Nonstop5h 02m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$334
PortlandWashington, D.C.
PDX Portland - IAD Washington, D.C. Dulles Intl
PDXIAD
Portland
Thu 10/1
12:34 pm-10:56 pm
1 stop7h 22m
Washington, D.C. Dulles Intl
Wed 10/7
7:05 am-11:49 am
1 stop7h 44m
$343
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Portland to Dulles Intl
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Dulles Intl in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Portland-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Portland-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Portland to Dulles Intl
Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Portland with our price prediction graph.
PDX-IAD
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
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Everything you need to know about your flight from Portland to Washington, D.C. Dulles Intl Airport
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Airlines
How far ahead should I book a flight from Portland to Washington, D.C. Dulles Intl Airport?
To ensure you get the cheapest price possible for a flight from Portland to Washington, D.C. Dulles Intl Airport, you should look to book at least 80 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Portland to Washington, D.C. Dulles Intl Airport?
Currently, January is the cheapest month in which you can book a flight from Portland to Washington, D.C. Dulles Intl Airport (average of $316). Flying from Portland to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $557). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from PDX to IAD?
Find hourly flight availability from Portland to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 5, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland to Washington, D.C. Dulles Intl Airport as you normally would.
Reviews of airlines servicing Dulles Intl
Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated September 5, 2026.
Read through reviews of airlines operating flights from Portland to Washington, D.C. Dulles Intl Airport, such as Alaska Airlines,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Comfort
7.8
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Comfort
7.8
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Comfort
7.8
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Related info for your journey
Find useful and relevant information for your journey from Portland to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Washington, D.C. Dulles Intl Airport?
Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locationsAlexandria
Owings Mills
Arlington
Tysons
Lanham
Reston
Herndon
Rockville
Chantilly
Hyattsville
Fredericksburg
Woodbridge
Falls Church
Sterling
Hanover
Laurel
Oxon Hill
Clinton
Hunt Valley
Silver Spring
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Other flights to Dulles Intl
Explore flights to Dulles Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 5, 2026.
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Portland and Dulles Intl flights
Browse other Portland and Dulles Intl flight options. Last updated on September 5, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from Portland to Dulles Intl
Discover the top 3 airlines that operate flights from Portland to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$138 | Average$392 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$223 | Average$430 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$297 | Average$481 | FlexibilityNo cancel fee | On-time69% |