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Dulles Intl

$347+ Cheap flights from Porto (OPO) to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — IAD
Jan 25 — Feb 11
Sat 1/25
Sat 2/1
1 adult, Economy
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Cheap flight deals from Porto to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Porto (OPO) 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 January 20, 2025.

Most accurate provider

Gurufare
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$473
(Air France)

One-way from

$347
(oojo)

Popular in

June

Cheapest in

February

Average price

$581
Provider with most accurate pricing for Porto-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for Porto-Washington, D.C. Dulles Intl flights.
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From Porto to Washington, D.C. Dulles Intl
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One-way flight from Porto to Washington, D.C. Dulles Intl
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High demand for flights, 27% potential price rise
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Best time to find cheap flights, 4% potential price drop
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Average for round-trip flights in January 2025
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Find flight deals from Porto to Dulles Intl

Cheapest flights from Porto to Dulles Intl
Explore the most affordable flight options available from Porto to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 20, 2025.

This Air France deal was found by Cheapflights users on 1/20. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/256:00 amOPO - IAD
1 stop14h 45mMultiple Airlines
Mon 3/107:30 pmIAD - OPO
1 stop11h 20mMultiple Airlines
Deal found 1/20$473
This Delta deal was found by Cheapflights users on 1/20. 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 2/36:20 amOPO - IAD
2 stops17h 36mDelta
Mon 2/176:30 pmIAD - OPO
1 stop11h 20mDelta
Deal found 1/20$478
This KLM deal was found by Cheapflights users on 1/20. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1411:25 amOPO - IAD
1 stop33h 10mKLM
Sat 5/319:20 pmIAD - OPO
1 stop13h 10mKLM
Deal found 1/20$479
This AirNGo deal was found by Cheapflights users on 1/20. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/314:20 pmOPO - IAD
2 stops28h 15mAir France
Thu 5/159:20 pmIAD - OPO
1 stop13h 10mAir France
Deal found 1/20$507
This United Airlines deal was found by Cheapflights users on 1/20. 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 2/246:00 amOPO - IAD
2 stops31h 05mUnited Airlines
Mon 3/106:50 pmIAD - OPO
1 stop16h 35mUnited Airlines
Deal found 1/20$521
This Lufthansa deal was found by Cheapflights users on 1/20. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/246:00 amOPO - IAD
1 stop19h 20mLufthansa
Tue 3/116:35 pmIAD - OPO
1 stop14h 15mLufthansa
Deal found 1/20$536
This Air Canada deal was found by Cheapflights users on 1/20. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/246:00 amOPO - IAD
2 stops44h 23mAir Canada
Tue 3/113:55 pmIAD - OPO
2 stops15h 45mAir Canada
Deal found 1/20$554
This Iberia deal was found by Cheapflights users on 1/20. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/258:40 pmOPO - IAD
2 stops28h 05mIberia
Sat 3/89:55 pmIAD - OPO
2 stops17h 05mIberia
Deal found 1/20$657
This American Airlines deal was found by Cheapflights users on 1/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/38:20 amOPO - IAD
2 stops16h 25mAmerican Airlines
Mon 2/171:48 pmIAD - OPO
2 stops12h 52mAmerican Airlines
Deal found 1/20$682
This SWISS deal was found by Cheapflights users on 1/20. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/317:20 pmOPO - IAD
2 stops25h 05mSWISS
Thu 5/155:20 pmIAD - OPO
2 stops20h 10mSWISS
Deal found 1/20$686
This oojo deal was found by Cheapflights users on 1/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/44:10 pmOPO - IAD
1 stop32h 20mTurkish Airlines
Thu 2/69:25 pmIAD - OPO
1 stop36h 45mTurkish Airlines
Deal found 1/20$711
This Cheapflightsfares deal was found by Cheapflights users on 1/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/46:55 amOPO - IAD
2 stops18h 25mTAP AIR PORTUGAL
Thu 2/65:30 pmIAD - OPO
1 stop11h 25mTAP AIR PORTUGAL
Deal found 1/20$1,049

Find flights from Porto to Dulles Intl within your budget

Customize your flight search to find flights from Porto 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 2,558,603 searches. Data last updated January 20, 2025.

Fly from

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Fly to

Any airport

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 2/25

6:00 am-3:45 pm

1 stop14h 45m

Washington, D.C. Dulles Intl

Tue 3/11

7:30 pm-10:35 am

1 stop11h 05m

$473

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 2/3

6:20 am-6:56 pm

2 stops17h 36m

Washington, D.C. Dulles Intl

Mon 2/17

6:30 pm-10:50 am

1 stop11h 20m

$478

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 5/14

11:25 am-3:35 pm

1 stop33h 10m

Washington, D.C. Dulles Intl

Sat 5/31

9:20 pm-3:30 pm

1 stop13h 10m

$479

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 3/31

4:20 pm-3:35 pm

2 stops28h 15m

Washington, D.C. Dulles Intl

Thu 5/15

9:20 pm-3:30 pm

1 stop13h 10m

$507

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 2/24

6:00 am-8:05 am

2 stops31h 05m

Washington, D.C. Dulles Intl

Sun 3/9

6:20 pm-11:35 am

1 stop13h 15m

$521

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 2/24

6:00 am-2:40 pm

1 stop13h 40m

Washington, D.C. Dulles Intl

Mon 3/10

6:35 pm-12:50 pm

1 stop14h 15m

$536

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 2/24

6:00 am-9:23 pm

2 stops44h 23m

Washington, D.C. Dulles Intl

Tue 3/11

3:55 pm-11:40 am

2 stops15h 45m

$554

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 2/25

8:40 pm-7:45 pm

2 stops28h 05m

Washington, D.C. Dulles Intl

Sat 3/8

9:55 pm-8:00 pm

2 stops17h 05m

$657

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 2/3

8:20 am-7:45 pm

2 stops16h 25m

Washington, D.C. Dulles Intl

Mon 2/17

1:48 pm-7:40 am

2 stops12h 52m

$682

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 3/31

7:20 pm-3:25 pm

2 stops25h 05m

Washington, D.C. Dulles Intl

Thu 5/15

5:20 pm-6:30 pm

2 stops20h 10m

$686

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 21 results
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Compare providers for flights from Porto 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 Porto to Dulles Intl in January.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars
GotogatePrice Accuracy2 starsTrust Score*2 stars
KAYAKPrice Accuracy-Trust Score*1 star
MytripPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy2 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Porto-Washington, D.C. Dulles Intl Airport flights, users find the pricing of Gurufare to be most consistent on Cheapflights vs. Gurufare Users can find the same prices on Porto-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. Gurufare >95% of the time. Price accuracy is based on data collected from Porto-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 Porto-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust Gurufare the most. Gurufare 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 Porto-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 Porto to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Porto with our price prediction graph.
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.

Travel insights for flights from Porto to Dulles Intl

Get recent, data-driven insights about flights from Porto to Dulles Intl including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Porto to Washington, D.C. Dulles Intl Airport?

Currently, August is the cheapest month in which you can book a flight from Porto to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Porto to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $389). 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 OPO to IAD?

Find hourly flight availability from Porto 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 January 20, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Porto to Washington, D.C. Dulles Intl Airport as you normally would.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 January 20, 2025.
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,521 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,341 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS
7.5
Good
1,599 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air France
7.4
Good
1,490 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
8,982 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Porto to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Porto to Washington, D.C. Dulles Intl?

    Porto (OPO), located 6.8 mi from the city center, is the airport you fly out of when you book flights from Porto to Washington, D.C. Dulles Intl. 1 airline have flights from Porto to Washington, D.C. Dulles Intl on a regular basis. Booking flights from Porto to Washington, D.C. Dulles Intl should not be difficult; the airport handles an average of 0 outbound flights to Washington, D.C. Dulles Intl per day.

  • What are the cheapest airlines flying from Porto to Washington, D.C. Dulles Intl Airport round-trip?

    Delta, at $478, was found to be the cheapest airline from Porto to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include KLM and Air France. Delta is priced at 33% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Porto to Washington, D.C. Dulles Intl Airport one-way?

    To fly one-way, consider booking your trip with Royal Air Maroc, which is currently one of the cheapest options available, starting at $347. British Airways flights start at $481 while deals on SWISS start at $514 one-way.

  • Can I find deals for flights from Porto to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Porto to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Porto to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Porto to Dulles Intl.

  • Can I find deals for business class flights from Porto to Dulles Intl?

    Yes. Cheapflights offers flight deals from Porto to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Porto to Washington, D.C. Dulles Intl Airport?

    Currently, August is the cheapest month in which you can book a flight from Porto to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Porto to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $389). 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.

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Traveling to a place near Porto?

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Alternative routes for Porto to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Lisbon to Dulles Intl flights
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Porto to Reagan-National flights

Top airline flying from Porto to Dulles Intl

Discover the top airline that operate flights from Porto 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 2,558,603 searches. Data last updated January 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$501Average$812FlexibilityNo cancel feeOn-timeN/A
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