How long is the flight from Portugal to Washington, D.C. Dulles Intl Airport?

Airlines like Scandinavian Airlines, American Airlines, and Iberia fly from Portugal to Washington, D.C. Dulles Intl Airport in about 11h 45m. The time it takes to get you to your destination can typically vary by up to 17h 35m. Airlines will cover a distance of 3537 mi. Both multi-stop and nonstop flights can be found to your destination and back.

What is the cheapest day to fly from Portugal to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their Portugal to Washington, D.C. Dulles Intl Airport flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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.

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).

What are the cheapest flights from Portugal to Washington, D.C. Dulles Intl Airport?

The cheapest flight price from Portugal to Washington, D.C. Dulles Intl Airport is $359. On average you can expect to pay $1,117. The most popular route, (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), can usually be booked for $488.

What are the most reliable airlines from Portugal to Washington, D.C. Dulles Intl Airport?

Consider Air Canada (62%), United Airlines (62%) or Lufthansa (62%) when booking your flight. These represent the most reliable airlines when flying from Portugal to Washington, D.C. Dulles Intl Airport.

What are the most popular airlines that fly from Portugal to Washington, D.C. Dulles Intl Airport?

Before booking your flight from Portugal to Washington, D.C. Dulles Intl Airport check out the most popular airlines for this route: Lufthansa, TAP AIR PORTUGAL or United Airlines.

What is the cheapest day to fly round-trip from Portugal to Washington, D.C. Dulles Intl Airport?

Saturday is generally a great day to depart. Flying on this day could help you save up to 22%.

How far in advance should I book a flight from Portugal to Washington, D.C. Dulles Intl Airport?

Travelers have found it’s best to book a flight 49 days in advance to save up to 82% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 49 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Portugal to Washington, D.C. Dulles Intl Airport 1-2 weeks in advance for as low as $572, or $750 for flights within the next 24 hours.

What is the cheapest month to fly from Portugal to Washington, D.C. Dulles Intl Airport?

The best pricing can be found in the month of September. Prices to Washington, D.C. Dulles Intl Airport from Portugal average $675. You can even find prices in September for less than $675, as users have found deals to Washington, D.C. Dulles Intl Airport from as low as $484. The month of July appears to be one of the more expensive times to travel to Washington, D.C. Dulles Intl Airport from Portugal. Flying in the targeted month can save you up to 30%.

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

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

How can I find direct flights from Portugal to Dulles Intl?

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

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

Yes. Cheapflights offers flight deals from Portugal 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.

$376+ Cheap Flights from Portugal to Washington, D.C. Dulles Intl Airport

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Portugal 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.

Cheap flight deals from Portugal to Dulles Intl

Round-trip from	$423 (Mytrip)
One-way from	$376 (Finnair)
Popular in	July
Cheapest in	September
Average price	$551
Good round-trip deal	$738 or less
Good one-way deal	$395 or less

From Portugal to Washington, D.C. Dulles Intl

Search Deals

One-way flight from Portugal to Washington, D.C. Dulles Intl

Search Deals

Highest demand for flights based on searches. 13% potential increase in price ($107 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Price to beat on a round-trip flight from Portugal to Washington, D.C. Dulles Intl.

Search Deals

Price to beat on a one-way flight from Portugal to Washington, D.C. Dulles Intl.

Search Deals

Find flight deals from Portugal to Dulles Intl

Cheapest flights from Portugal to Dulles Intl
Explore the most affordable flight options available from Portugal to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Fri 11/216:30 amLIS - IAD

2 stops17h 50mMultiple Airlines

Tue 12/26:20 pmIAD - LIS

1 stop12h 45mMultiple Airlines

Deal found 9/15

$518

Sat 11/810:30 amLIS - IAD

2 stops13h 51mMultiple Airlines

Mon 11/249:45 pmIAD - LIS

1 stop19h 10mMultiple Airlines

Deal found 9/14

$521

Sat 11/16:45 pmLIS - IAD

1 stop26h 45mAmerican Airlines

Sat 11/156:20 pmIAD - LIS

1 stop12h 50mAmerican Airlines

Deal found 9/14

$523

Sat 11/16:45 pmLIS - IAD

1 stop26h 45mMultiple Airlines

Sat 11/156:20 pmIAD - LIS

1 stop18h 35mMultiple Airlines

Deal found 9/15

$524

Sat 11/87:00 amLIS - IAD

1 stop13h 35mBritish Airways

Mon 11/249:45 pmIAD - LIS

1 stop16h 10mBritish Airways

Deal found 9/14

$526

Wed 10/155:00 amLIS - IAD

1 stop15h 35mMultiple Airlines

Sun 10/196:30 pmIAD - LIS

1 stop15h 20mMultiple Airlines

Deal found 9/14

$527

Sat 11/810:30 amLIS - IAD

2 stops13h 51mAmerican Airlines

Sat 11/156:20 pmIAD - LIS

1 stop15h 30mAmerican Airlines

Deal found 9/12

$528

Thu 11/65:00 amLIS - IAD

1 stop16h 05mMultiple Airlines

Wed 11/196:50 pmIAD - LIS

1 stop22h 35mMultiple Airlines

Deal found 9/13

$529

Thu 10/28:15 amOPO - IAD

1 stop11h 45mIberia

Wed 10/154:35 pmIAD - OPO

1 stop18h 20mIberia

Deal found 9/14

$530

Wed 10/296:35 pmLIS - IAD

1 stop26h 00mBritish Airways

Wed 11/56:20 pmIAD - LIS

1 stop22h 30mBritish Airways

Deal found 9/14

$532

Wed 10/155:00 amLIS - IAD

2 stops19h 18mDelta

Sun 10/197:59 pmIAD - LIS

2 stops16h 51mDelta

Deal found 9/13

$533

Tue 9/238:15 amOPO - IAD

1 stop11h 45mAmerican Airlines

Sat 10/412:48 pmIAD - OPO

2 stops13h 47mAmerican Airlines

Deal found 9/15

$535

Best flights from Portugal to Dulles Intl
Discover carefully curated flight deals from Portugal to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2025.

Sun 2/14:55 pmLIS - IAD

1 stop29h 20mScandinavian Airlines

Sat 2/712:30 pmIAD - LIS

2 stops22h 35mScandinavian Airlines

Deal found 9/15

$499

Fri 11/216:30 amLIS - IAD

2 stops17h 50mMultiple Airlines

Tue 12/26:20 pmIAD - LIS

1 stop12h 45mMultiple Airlines

Deal found 9/13

$518

Tue 3/1010:35 amLIS - IAD

1 stop14h 20mAmerican Airlines

Mon 3/2310:45 pmIAD - LIS

1 stop16h 10mAmerican Airlines

Deal found 9/13

$523

Wed 3/117:05 amLIS - IAD

1 stop13h 30mBritish Airways

Sun 3/227:20 pmIAD - LIS

1 stop22h 25mBritish Airways

Deal found 9/13

$526

Thu 9/255:00 amLIS - IAD

1 stop15h 35mDelta

Sat 10/46:30 pmIAD - LIS

1 stop15h 20mDelta

Deal found 9/14

$528

Thu 10/28:15 amOPO - IAD

1 stop11h 45mIberia

Wed 10/154:35 pmIAD - OPO

1 stop18h 20mIberia

Deal found 9/14

$530

Fri 10/3112:50 pmOPO - IAD

1 stop32h 50mSWISS

Tue 11/115:25 pmIAD - OPO

1 stop12h 50mSWISS

Deal found 9/14

$541

Fri 9/266:40 amOPO - IAD

1 stop13h 55mKLM

Sun 10/55:25 pmIAD - OPO

1 stop23h 50mKLM

Deal found 9/15

$552

Sat 11/16:45 pmLIS - IAD

1 stop26h 45mMultiple Airlines

Sat 11/156:20 pmIAD - LIS

1 stop18h 35mMultiple Airlines

Deal found 9/15

$524

Thu 10/307:00 amLIS - IAD

1 stop13h 35mBritish Airways

Thu 11/69:45 pmIAD - LIS

1 stop15h 15mBritish Airways

Deal found 9/15

$526

Sat 11/15:00 amLIS - IAD

1 stop16h 05mDelta

Sat 11/156:50 pmIAD - LIS

1 stop11h 30mDelta

Deal found 9/14

$528

Sat 11/810:40 amLIS - IAD

2 stops13h 41mAmerican Airlines

Sat 11/156:20 pmIAD - LIS

1 stop18h 35mAmerican Airlines

Deal found 9/14

$528

Last-minute flights from Portugal to Dulles Intl
Discover last-minute flight deals from Portugal to Dulles Intl. Data last updated September 15, 2025 and is based on user searches.

Tue 9/238:15 amOPO - IAD

1 stop11h 45mAmerican Airlines

Sat 10/412:48 pmIAD - OPO

2 stops13h 47mAmerican Airlines

Deal found 9/15

$535

Thu 9/255:00 amLIS - IAD

1 stop15h 35mDelta

Sat 10/48:17 pmIAD - LIS

2 stops13h 33mDelta

Deal found 9/14

$528

Fri 9/269:20 amOPO - IAD

1 stop12h 00mKLM

Sat 10/49:20 pmIAD - OPO

1 stop13h 10mKLM

Deal found 9/14

$538

Fri 9/266:40 amOPO - IAD

1 stop13h 55mDelta

Sat 10/48:17 pmIAD - OPO

2 stops14h 13mDelta

Deal found 9/15

$544

Thu 10/28:15 amOPO - IAD

1 stop11h 45mIberia

Wed 10/154:35 pmIAD - OPO

1 stop18h 20mIberia

Deal found 9/14

$530

Thu 10/27:20 pmOPO - IAD

1 stop25h 55mSWISS

Wed 10/158:45 pmIAD - OPO

1 stop16h 45mSWISS

Deal found 9/15

$540

Thu 10/25:05 amLIS - IAD

1 stop13h 25mUnited Airlines

Wed 10/86:50 pmIAD - LIS

2 stops33h 30mUnited Airlines

Deal found 9/12

$546

Wed 10/155:00 amLIS - IAD

1 stop15h 35mMultiple Airlines

Sun 10/196:30 pmIAD - LIS

1 stop15h 20mMultiple Airlines

Deal found 9/14

$527

Wed 10/155:00 amLIS - IAD

2 stops19h 18mDelta

Sun 10/197:59 pmIAD - LIS

2 stops16h 51mDelta

Deal found 9/13

$533

Tue 10/285:00 amLIS - IAD

1 stop15h 50mUnited Airlines

Tue 11/48:19 amIAD - LIS

2 stops20h 01mUnited Airlines

Deal found 9/13

$540

Wed 10/296:35 pmLIS - IAD

1 stop26h 00mBritish Airways

Wed 11/56:20 pmIAD - LIS

1 stop15h 30mBritish Airways

Deal found 9/14

$526

Fri 10/3112:50 pmOPO - IAD

1 stop32h 50mSWISS

Mon 11/105:25 pmIAD - OPO

1 stop12h 50mSWISS

Deal found 9/14

$541

One-way flights from Portugal to Dulles Intl
Search for one-way flight options from Portugal to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 15, 2025.

Fri 11/146:30 amLIS - IAD

2 stops21h 37mMultiple Airlines

Deal found 9/15

$376

Sat 3/147:00 amLIS - IAD

1 stop13h 35mAmerican Airlines

Deal found 9/15

$388

Sun 11/167:05 amLIS - IAD

1 stop17h 50mBritish Airways

Deal found 9/15

$390

Sun 11/238:45 pmLIS - IAD

2 stops31h 22mMultiple Airlines

Deal found 9/15

$398

Sun 11/1611:05 amLIS - IAD

2 stops17h 54mMultiple Airlines

Deal found 9/15

$402

Wed 10/85:55 amLIS - IAD

2 stops42h 12mMultiple Airlines

Deal found 9/14

$404

Mon 10/136:50 pmOPO - IAD

3 stops49h 30mMultiple Airlines

Deal found 9/14

$413

Tue 10/217:00 amOPO - IAD

1 stop13h 20mTAP AIR PORTUGAL

Deal found 9/14

$428

Tue 10/710:05 pmLIS - IAD

3 stops50h 02mMultiple Airlines

Deal found 9/14

$437

Tue 9/305:10 pmOPO - IAD

3 stops54h 14mMultiple Airlines

Deal found 9/14

$449

Wed 10/295:15 pmLIS - IAD

Nonstop8h 45mTAP AIR PORTUGAL

Deal found 9/15

$462

Sun 1/117:50 pmOPO - IAD

3 stops49h 40mMultiple Airlines

Deal found 9/14

$469

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portugal to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Sun 2/1

4:55 pm-5:15 pm

1 stop29h 20m

Washington, D.C. Dulles Intl

Sat 2/7

12:30 pm-4:05 pm

2 stops22h 35m

$499

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 11/21

6:30 am-7:20 pm

2 stops17h 50m

Washington, D.C. Dulles Intl

Tue 12/2

6:20 pm-12:05 pm

1 stop12h 45m

$518

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Tue 3/10

10:35 am-8:55 pm

1 stop14h 20m

Washington, D.C. Dulles Intl

Mon 3/23

10:45 pm-6:55 pm

1 stop16h 10m

$523

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Sat 11/1

6:45 pm-5:30 pm

1 stop26h 45m

Washington, D.C. Dulles Intl

Sat 11/15

6:20 pm-5:55 pm

1 stop18h 35m

$524

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Wed 3/11

7:05 am-4:35 pm

1 stop13h 30m

Washington, D.C. Dulles Intl

Sun 3/22

7:20 pm-9:45 pm

1 stop22h 25m

$526

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 10/30

7:00 am-4:35 pm

1 stop13h 35m

Washington, D.C. Dulles Intl

Thu 11/6

9:45 pm-6:00 pm

1 stop15h 15m

$526

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Sat 11/8

5:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Sat 11/15

6:50 pm-11:20 am

1 stop11h 30m

$527

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 9/25

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Sat 10/4

6:30 pm-2:50 pm

1 stop15h 20m

$528

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Sat 11/1

5:00 am-5:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Sat 11/15

6:50 pm-11:20 am

1 stop11h 30m

$528

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Sat 11/8

10:40 am-7:21 pm

2 stops13h 41m

Washington, D.C. Dulles Intl

Sat 11/15

6:20 pm-5:55 pm

1 stop18h 35m

$528

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 39 results

Best time to book a flight from Portugal to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Portugal 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.

Cheapflights Insights

Everything you need to know about your flight from Portugal to Washington, D.C. Dulles Intl Airport

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

Currently, August is the cheapest month in which you can book a flight from Portugal to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Portugal to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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 PT to IAD?

When flying from Portugal to Washington, D.C. Dulles Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 38% versus a flight in the morning.

Weekly flight availability from Portugal to Washington, D.C. Dulles Intl Airport

The most flights from PT0 to IAD are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

Reviews of airlines servicing Dulles Intl

Read through reviews of airlines operating flights from Portugal to Washington, D.C. Dulles Intl Airport, such as United Airlines, TAP AIR PORTUGAL, and Lufthansa. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,929 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

United Airlines

7.4

Good

8,929 reviews

United Airlines

7.4

Good

8,929 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

TAP AIR PORTUGAL

7.1

Good

1,975 reviews

United Airlines

7.4

Good

8,929 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Lufthansa

6.8

Okay

7,407 reviews

United Airlines

7.4

Good

8,929 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

How long is the flight from Portugal to Washington, D.C. Dulles Intl Airport?
Airlines like Scandinavian Airlines, American Airlines, and Iberia fly from Portugal to Washington, D.C. Dulles Intl Airport in about 11h 45m. The time it takes to get you to your destination can typically vary by up to 17h 35m. Airlines will cover a distance of 3537 mi. Both multi-stop and nonstop flights can be found to your destination and back.
What are the most reliable airlines from Portugal to Washington, D.C. Dulles Intl Airport?
Consider Air Canada (62%), United Airlines (62%) or Lufthansa (62%) when booking your flight. These represent the most reliable airlines when flying from Portugal to Washington, D.C. Dulles Intl Airport.
What are the cheapest flights from Portugal to Washington, D.C. Dulles Intl Airport?
The cheapest flight price from Portugal to Washington, D.C. Dulles Intl Airport is $359. On average you can expect to pay $1,117. The most popular route, (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), can usually be booked for $488.
Can I find deals for flights from Portugal to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Portugal to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portugal to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portugal to Dulles Intl.
Can I find deals for business class flights from Portugal to Dulles Intl?
Yes. Cheapflights offers flight deals from Portugal 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 Portugal to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from Portugal to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Portugal to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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.

See more FAQs

Woodbridge

Arlington

Alexandria

Tysons

Silver Spring

Springfield

Gaithersburg

Fredericksburg

Linthicum Heights

Fairfax

Falls Church

Owings Mills

Manassas

Rockville

Hanover

Oxon Hill

Laurel

Towson

National Harbor

Dundalk

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Portugal to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
TAP AIR PORTUGAL	Cheapest$480	Average$797	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$534	Average$635	FlexibilityNo cancel fee	On-time69%
Lufthansa	Cheapest$536	Average$740	FlexibilityNo cancel fee	On-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$376+ Cheap flights from Portugal 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 11/14. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portugal to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Portugal to Dulles Intl

Keep the following information in mind while searching for Portugal to Dulles Intl flight deals. Data was last updated September 15, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Portugal to Dulles Intl

Cheapest flights from Portugal to Dulles IntlExplore the most affordable flight options available from Portugal to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Explore the most affordable flight options available from Portugal to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portugal to Washington, D.C. Dulles Intl Airport that are best for you.

Best time to book a flight from Portugal to Dulles Intl

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

Cheapflights Insights

Everything you need to know about your flight from Portugal to Washington, D.C. Dulles Intl Airport

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

What is the cheapest time of day to fly from PT to IAD?

Find hourly flight availability from Portugal 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 15, 2025.

Weekly flight availability from Portugal to Washington, D.C. Dulles Intl Airport

Reviews of airlines servicing Dulles Intl

Read through reviews of airlines operating flights from Portugal to Washington, D.C. Dulles Intl Airport, such as United Airlines, TAP AIR PORTUGAL, and Lufthansa. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

How long is the flight from Portugal to Washington, D.C. Dulles Intl Airport?

What are the most reliable airlines from Portugal to Washington, D.C. Dulles Intl Airport?

What are the cheapest flights from Portugal to Washington, D.C. Dulles Intl Airport?

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

How can I find direct flights from Portugal to Dulles Intl?

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

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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portugal to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Portugal to Dulles Intl

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Portugal to Dulles Intl
Explore the most affordable flight options available from Portugal to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.