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

The cheapest airlines for a one-way flight from Portugal to Washington, D.C. Dulles Intl Airport are Royal Air Maroc ($386), Aer Lingus ($475), and Icelandair ($491).

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.

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 $374. On average you can expect to pay $1,785. The most popular route, (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), can usually be booked for $485.

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

Consider Air Canada (55%), United Airlines (55%) or Lufthansa (55%) when booking your flight. These represent the most reliable airlines when flying from Portugal to Washington, D.C. Dulles Intl Airport.

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

Wednesday is generally a great day to depart. Flying on this day could help you save up to 20%.

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 71% 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 $551, 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 $666. You can even find prices in September for less than $666, as users have found deals to Washington, D.C. Dulles Intl Airport from as low as $490. 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.

$646+ Flights from Portugal to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Portugal to Dulles Intl

Round-trip from	$466 (Cheapflightsfares)
One-way from	$386 (FlightHub)
Popular in	July
Cheapest in	September
Average price	$734
Good round-trip deal	$617 or less
Good one-way deal	$591 or less

From Portugal to Washington, D.C. Dulles Intl

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

Search Deals

Highest demand for flights based on searches. 15% potential increase in price ($124 potential increase over avg. RT price).

Search Deals

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

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Average for round-trip flights in June 2025

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

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

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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 June 12, 2025.

Wed 12/2412:55 pmOPO - IAD

1 stop30h 40mBrussels Airlines

Sat 1/35:45 pmIAD - OPO

1 stop13h 20mBrussels Airlines

Deal found 6/10

$417

Fri 8/296:35 amLIS - IAD

1 stop13h 25mMultiple Airlines

Tue 9/210:40 pmIAD - LIS

1 stop14h 15mMultiple Airlines

Deal found 6/12

$466

Thu 9/115:00 amLIS - IAD

1 stop15h 35mDelta

Fri 9/199:20 pmIAD - LIS

1 stop12h 30mDelta

Deal found 6/12

$470

Wed 9/36:35 amLIS - IAD

1 stop13h 25mAmerican Airlines

Wed 9/1710:40 pmIAD - LIS

1 stop14h 15mAmerican Airlines

Deal found 6/11

$475

Mon 6/236:30 amOPO - IAD

1 stop14h 05mDelta

Wed 7/99:20 pmIAD - OPO

1 stop13h 10mDelta

Deal found 6/12

$486

Thu 8/287:20 amLIS - IAD

1 stop15h 15mBritish Airways

Mon 10/2710:55 pmIAD - LIS

1 stop16h 00mBritish Airways

Deal found 6/10

$488

Wed 10/88:15 amOPO - IAD

1 stop11h 45mAmerican Airlines

Tue 10/214:35 pmIAD - OPO

1 stop14h 05mAmerican Airlines

Deal found 6/11

$491

Wed 10/810:25 pmOPO - IAD

1 stop21h 55mTAP AIR PORTUGAL

Tue 10/215:00 pmIAD - OPO

1 stop16h 05mTAP AIR PORTUGAL

Deal found 6/12

$492

Sun 6/224:20 pmOPO - IAD

1 stop28h 15mKLM

Mon 7/75:25 pmIAD - OPO

1 stop17h 10mKLM

Deal found 6/12

$493

Thu 10/235:30 pmLIS - IAD

Nonstop8h 20mTAP AIR PORTUGAL

Sun 11/210:30 pmIAD - LIS

Nonstop7h 05mTAP AIR PORTUGAL

Deal found 6/12

$494

Thu 6/196:35 amLIS - IAD

1 stop13h 25mIberia

Sat 7/54:35 pmIAD - LIS

1 stop20h 50mIberia

Deal found 6/11

$526

Thu 11/65:00 amLIS - IAD

2 stops16h 31mKLM

Wed 11/195:35 pmIAD - LIS

1 stop12h 00mKLM

Deal found 6/11

$529

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 June 12, 2025.

Fri 8/296:35 amLIS - IAD

1 stop13h 25mMultiple Airlines

Tue 9/210:40 pmIAD - LIS

1 stop14h 15mMultiple Airlines

Deal found 6/12

$466

Thu 9/115:00 amLIS - IAD

1 stop15h 35mDelta

Fri 9/199:20 pmIAD - LIS

1 stop12h 30mDelta

Deal found 6/12

$470

Wed 9/36:35 amLIS - IAD

1 stop13h 25mAmerican Airlines

Wed 9/1710:40 pmIAD - LIS

1 stop14h 15mAmerican Airlines

Deal found 6/11

$475

Thu 8/287:20 amLIS - IAD

1 stop15h 15mBritish Airways

Mon 10/2710:55 pmIAD - LIS

1 stop16h 00mBritish Airways

Deal found 6/10

$488

Wed 10/810:25 pmOPO - IAD

1 stop21h 55mTAP AIR PORTUGAL

Tue 10/215:00 pmIAD - OPO

1 stop16h 05mTAP AIR PORTUGAL

Deal found 6/12

$492

Sun 6/224:20 pmOPO - IAD

1 stop28h 15mKLM

Mon 7/75:25 pmIAD - OPO

1 stop17h 10mKLM

Deal found 6/12

$493

Fri 11/285:00 amLIS - IAD

2 stops21h 20mUnited Airlines

Sun 12/75:20 pmIAD - LIS

1 stop9h 50mUnited Airlines

Deal found 6/10

$557

Wed 10/86:00 amOPO - IAD

2 stops20h 05mAir Canada

Tue 10/219:45 amIAD - OPO

2 stops25h 00mAir Canada

Deal found 6/10

$583

Fri 11/285:00 amLIS - IAD

1 stop15h 50mLufthansa

Sun 12/710:05 pmIAD - LIS

Nonstop7h 10mLufthansa

Deal found 6/10

$584

Tue 7/15:40 amLIS - IAD

1 stop15h 40mAir France

Tue 7/86:30 pmIAD - LIS

1 stop18h 20mAir France

Deal found 6/11

$617

Thu 7/1011:25 amLIS - IAD

1 stop12h 30mAer Lingus

Thu 7/178:25 pmIAD - LIS

1 stop20h 10mAer Lingus

Deal found 6/10

$618

Sat 12/611:15 amLIS - IAD

2 stops16h 45mVirgin Atlantic

Sat 12/1312:35 pmIAD - LIS

2 stops15h 25mVirgin Atlantic

Deal found 6/10

$634

Last-minute flights from Portugal to Dulles Intl
Discover last-minute flight deals from Portugal to Dulles Intl. Data last updated June 12, 2025 and is based on user searches.

Tue 6/179:50 amLIS - IAD

1 stop14h 25mAir France

Sat 6/219:20 pmIAD - LIS

1 stop12h 30mAir France

Deal found 6/10

$706

Tue 6/1712:50 pmOPO - IAD

1 stop13h 18mMultiple Airlines

Tue 6/248:45 pmIAD - OPO

1 stop33h 40mMultiple Airlines

Deal found 6/11

$734

Wed 6/1811:25 amLIS - IAD

1 stop14h 36mUnited Airlines

Sun 6/2210:15 pmIAD - LIS

Nonstop7h 15mUnited Airlines

Deal found 6/10

$575

Thu 6/196:35 amLIS - IAD

1 stop13h 25mIberia

Sat 7/54:35 pmIAD - LIS

1 stop20h 50mIberia

Deal found 6/11

$526

Thu 6/197:20 amLIS - IAD

1 stop17h 50mMultiple Airlines

Sat 7/54:35 pmIAD - LIS

1 stop20h 50mMultiple Airlines

Deal found 6/12

$541

Thu 6/195:00 amLIS - IAD

1 stop15h 35mDelta

Sat 7/58:30 pmIAD - LIS

2 stops16h 25mDelta

Deal found 6/12

$572

Thu 6/196:35 amLIS - IAD

1 stop13h 25mAmerican Airlines

Sat 7/510:45 pmIAD - LIS

1 stop14h 20mAmerican Airlines

Deal found 6/12

$574

Thu 6/1912:20 pmLIS - IAD

Nonstop8h 15mLufthansa

Sat 7/510:20 pmIAD - LIS

Nonstop7h 15mLufthansa

Deal found 6/11

$747

Thu 6/195:00 amLIS - IAD

1 stop15h 35mDelta

Sat 7/59:20 pmIAD - LIS

1 stop12h 30mDelta

Deal found 6/12

$572

Fri 6/207:20 amLIS - IAD

1 stop17h 50mBritish Airways

Sun 7/610:40 pmIAD - LIS

1 stop19h 25mBritish Airways

Deal found 6/11

$591

Fri 6/2010:00 amLIS - IAD

1 stop30h 59mVirgin Atlantic

Sun 7/68:30 pmIAD - LIS

2 stops33h 15mVirgin Atlantic

Deal found 6/10

$688

Sun 6/224:20 pmOPO - IAD

1 stop28h 15mKLM

Mon 7/75:25 pmIAD - OPO

1 stop17h 10mKLM

Deal found 6/12

$493

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 June 12, 2025.

Sun 10/197:00 pmOPO - IAD

1 stop29h 05mRoyal Air Maroc

Deal found 6/12

$386

Tue 7/81:30 pmOPO - IAD

1 stop30h 26mMultiple Airlines

Deal found 6/10

$430

Thu 11/279:00 pmLIS - IAD

2 stops26h 40mMultiple Airlines

Deal found 6/10

$448

Sat 9/2011:25 amLIS - IAD

1 stop12h 30mAer Lingus

Deal found 6/10

$475

Wed 10/157:10 amLIS - IAD

2 stops17h 10mIcelandair

Deal found 6/12

$491

Tue 10/218:15 amOPO - IAD

1 stop11h 45mIberia

Deal found 6/10

$491

Tue 7/16:40 pmLIS - IAD

1 stop29h 25mRoyal Air Maroc

Deal found 6/10

$510

Thu 10/212:25 pmOPO - IAD

1 stop13h 25mTAP AIR PORTUGAL

Deal found 6/9

$520

Wed 10/155:30 pmLIS - IAD

Nonstop8h 20mTAP AIR PORTUGAL

Deal found 6/10

$524

Tue 9/238:15 amOPO - IAD

1 stop11h 45mAmerican Airlines

Deal found 6/11

$537

Sun 9/76:35 amLIS - IAD

1 stop13h 25mFinnair

Deal found 6/11

$540

Mon 8/255:55 amLIS - IAD

1 stop15h 20mSWISS

Deal found 6/12

$542

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

Fri 8/29

6:35 am-3:00 pm

1 stop13h 25m

Washington, D.C. Dulles Intl

Tue 9/2

10:40 pm-5:55 pm

1 stop14h 15m

$466

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 9/11

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Fri 9/19

9:20 pm-2:50 pm

1 stop12h 30m

$470

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Wed 9/3

6:35 am-3:00 pm

1 stop13h 25m

Washington, D.C. Dulles Intl

Wed 9/17

10:40 pm-5:55 pm

1 stop14h 15m

$475

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 6/23

6:30 am-3:35 pm

1 stop14h 05m

Washington, D.C. Dulles Intl

Wed 7/9

9:20 pm-3:30 pm

1 stop13h 10m

$486

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 8/28

7:20 am-5:35 pm

1 stop15h 15m

Washington, D.C. Dulles Intl

Mon 10/27

10:55 pm-6:55 pm

1 stop16h 00m

$488

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 10/8

8:15 am-3:00 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

Tue 10/21

4:35 pm-11:40 am

1 stop14h 05m

$491

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 10/8

10:25 pm-3:20 pm

1 stop21h 55m

Washington, D.C. Dulles Intl

Tue 10/21

5:00 pm-2:05 pm

1 stop16h 05m

$492

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 6/22

4:20 pm-3:35 pm

1 stop28h 15m

Washington, D.C. Dulles Intl

Mon 7/7

5:25 pm-3:35 pm

1 stop17h 10m

$493

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 10/23

5:30 pm-8:50 pm

Nonstop8h 20m

Washington, D.C. Dulles Intl

Sun 11/2

10:30 pm-10:35 am

Nonstop7h 05m

$494

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 11/6

5:00 am-4:31 pm

2 stops16h 31m

Washington, D.C. Dulles Intl

Wed 11/19

5:35 pm-10:35 am

1 stop12h 00m

$529

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 55 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 $309). Flying from Portugal to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $349). 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 39% 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 Saturday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Dulles Intl 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

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

See what other customers who have flown with Delta, KLM and Austrian Airlines from Portugal to Washington, D.C. have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,946 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,946 reviews

Delta

8.0

Very good

7,946 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,358 reviews

Delta

8.0

Very good

7,946 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Austrian Airlines

7.6

Good

802 reviews

Delta

8.0

Very good

7,946 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Finnair

7.6

Good

1,290 reviews

Delta

8.0

Very good

7,946 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Air France

7.5

Good

1,463 reviews

Delta

8.0

Very good

7,946 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines to fly from Portugal to Washington, D.C. Dulles Intl Airport one-way?
The cheapest airlines for a one-way flight from Portugal to Washington, D.C. Dulles Intl Airport are Royal Air Maroc ($386), Aer Lingus ($475), and Icelandair ($491).
What are the most reliable airlines from Portugal to Washington, D.C. Dulles Intl Airport?
Consider Air Canada (55%), United Airlines (55%) or Lufthansa (55%) 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 $374. On average you can expect to pay $1,785. The most popular route, (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), can usually be booked for $485.
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 $309). Flying from Portugal to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $349). 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

Arlington

Alexandria

Woodbridge

Tysons

Silver Spring

Linthicum Heights

Fredericksburg

Gaithersburg

Fairfax

Falls Church

Easton

Herndon

Towson

Sterling

Bowie

Rockville

Reston

National Harbor

Springfield

Manassas

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Portugal to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
TAP AIR PORTUGAL	Cheapest$480	Average$742	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$534	Average$636	FlexibilityNo cancel fee	On-time69%

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$386+ 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 10/19. 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

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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 June 12, 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 June 12, 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 June 12, 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 June 12, 2025.

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

Explore weekly flight availability from Portugal to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 12, 2025.

Rainfall in Dulles Intl by month

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

Temperature in Dulles Intl by month

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

Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Delta, KLM and Austrian Airlines from Portugal to Washington, D.C. have to say. 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.

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

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 Portugal?

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

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Top 2 airlines flying from Portugal to Dulles Intl

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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 June 12, 2025.