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

The cheapest airlines for a one-way flight from Washington, D.C. Dulles Intl Airport to Portugal are TAP AIR PORTUGAL ($388), Scandinavian Airlines ($408), and Royal Air Maroc ($434).

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

While some choose either Washington, D.C. Dulles Intl - Porto or Washington, D.C. Dulles Intl - Ponta Delgada Nordela, Washington, D.C. Dulles Intl - Lisbon Humberto Delgado is the most popular route from Washington, D.C. Dulles Intl Airport to Portugal.

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

Looking for the cheapest flight from Washington, D.C. Dulles Intl Airport to Portugal? While on average our users pay $1,693, our data indicates the cheapest price to be $251. The most popular route (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), is priced around $554.

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

Before booking your flight from Washington, D.C. Dulles Intl Airport to Portugal check out the most popular airlines for this route: American Airlines, Air France or Royal Air Maroc.

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

It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 45 days in advance, which can save you up to 35% on flights from Washington, D.C. Dulles Intl Airport to Portugal compared to booking the week you need them. Waiting 45 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $993. For sooner than that we have options available in the next 3 days from $993.

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

The best pricing can be found in the month of February. Prices to Portugal from Washington, D.C. Dulles Intl Airport average $913. You can even find prices in February for less than $913, as users have found deals to Portugal from as low as $349. The month of December appears to be one of the more expensive times to travel to Portugal from Washington, D.C. Dulles Intl Airport. Flying in the targeted month can save you up to 41%.

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

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

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

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

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

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

$684+ Flights from Washington, D.C. Dulles Intl Airport to Portugal

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Cheap flight deals from Dulles Intl to Portugal

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$627 (Gotogate)
One-way from	$368 (Mytrip)
Popular in	December
Cheapest in	February
Average price	$881
Good round-trip deal	$624 or less
Good one-way deal	$368 or less

Provider with most accurate pricing for Washington, D.C. (WAS)-Lisbon Humberto Delgado flight deals.

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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Lisbon Humberto Delgado flights.

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From Washington, D.C. Dulles Intl to Portugal

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

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Highest demand for flights based on searches. 1% potential increase in price ($11 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).

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Average for round-trip flights in April 2025

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

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

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Find flight deals from Dulles Intl to Portugal

Cheapest flights from Dulles Intl to Portugal
Explore the most affordable flight options available from Dulles Intl to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

Sun 11/28:30 pmIAD - LIS

1 stop14h 35mScandinavian Airlines

Mon 11/104:55 pmLIS - IAD

1 stop29h 20mScandinavian Airlines

Deal found 4/10

$525

Sun 11/98:40 pmIAD - LIS

1 stop9h 55mRoyal Air Maroc

Wed 11/1212:35 pmLIS - IAD

1 stop11h 05mRoyal Air Maroc

Deal found 4/10

$565

Sun 11/98:30 pmIAD - LIS

1 stop14h 35mMultiple Airlines

Tue 11/186:10 pmLIS - IAD

2 stops28h 05mMultiple Airlines

Deal found 4/10

$592

Mon 10/135:45 pmIAD - PDL

1 stop20h 50mTAP AIR PORTUGAL

Mon 10/207:40 pmPDL - IAD

1 stop23h 40mTAP AIR PORTUGAL

Deal found 4/11

$610

Tue 7/18:14 pmIAD - OPO

2 stops18h 16mBritish Airways

Tue 7/88:40 pmOPO - IAD

1 stop28h 30mBritish Airways

Deal found 4/10

$627

Tue 8/195:20 pmIAD - OPO

1 stop11h 25mUnited Airlines

Tue 8/2612:50 pmOPO - IAD

2 stops28h 05mUnited Airlines

Deal found 4/9

$628

Sun 9/215:10 pmIAD - OPO

2 stops35h 25mMultiple Airlines

Fri 10/3111:55 amOPO - IAD

1 stop33h 35mMultiple Airlines

Deal found 4/10

$631

Wed 9/249:55 amIAD - OPO

1 stop18h 30mAir Canada

Tue 10/76:00 amOPO - IAD

2 stops20h 01mAir Canada

Deal found 4/11

$632

Tue 9/95:00 pmIAD - OPO

1 stop12h 00mTAP AIR PORTUGAL

Sat 10/47:00 amOPO - IAD

1 stop18h 05mTAP AIR PORTUGAL

Deal found 4/11

$634

Tue 6/104:20 pmIAD - LIS

2 stops33h 10mPorter Airlines

Tue 6/178:15 amLIS - IAD

2 stops35h 51mPorter Airlines

Deal found 4/10

$636

Fri 9/54:35 pmIAD - OPO

1 stop14h 05mIberia

Fri 9/128:15 amOPO - IAD

1 stop11h 45mIberia

Deal found 4/10

$640

Fri 10/2410:05 pmIAD - FAO

1 stop14h 50mScandinavian Airlines

Sat 11/15:10 pmFAO - IAD

1 stop30h 40mScandinavian Airlines

Deal found 4/10

$645

Best flights from Dulles Intl to Portugal
Discover carefully curated flight deals from Dulles Intl to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 11, 2025.

Tue 7/18:14 pmIAD - OPO

2 stops18h 16mBritish Airways

Tue 7/88:40 pmOPO - IAD

1 stop28h 30mBritish Airways

Deal found 4/10

$627

Sun 5/48:45 pmIAD - OPO

1 stop33h 40mMultiple Airlines

Wed 5/146:00 amOPO - IAD

2 stops20h 08mMultiple Airlines

Deal found 4/10

$632

Tue 6/104:20 pmIAD - LIS

2 stops33h 10mPorter Airlines

Tue 6/178:15 amLIS - IAD

2 stops35h 51mPorter Airlines

Deal found 4/10

$636

Tue 9/235:00 pmIAD - PDL

1 stop12h 45mTAP AIR PORTUGAL

Mon 9/297:40 pmPDL - IAD

1 stop23h 40mTAP AIR PORTUGAL

Deal found 4/10

$643

Sun 5/412:40 pmIAD - OPO

2 stops18h 20mAir Canada

Wed 5/146:00 amOPO - IAD

2 stops20h 08mAir Canada

Deal found 4/10

$657

Wed 4/238:45 pmIAD - OPO

1 stop16h 45mSWISS

Thu 5/812:15 pmOPO - IAD

1 stop33h 00mSWISS

Deal found 4/10

$660

Tue 4/229:20 pmIAD - OPO

1 stop13h 10mKLM

Mon 4/284:20 pmOPO - IAD

1 stop28h 15mKLM

Deal found 4/10

$662

Wed 5/79:05 pmIAD - LIS

1 stop10h 10mRoyal Air Maroc

Mon 5/1212:00 pmLIS - IAD

1 stop12h 05mRoyal Air Maroc

Deal found 4/10

$662

Tue 7/110:18 pmIAD - OPO

2 stops30h 02mUnited Airlines

Tue 7/812:50 pmOPO - IAD

2 stops32h 36mUnited Airlines

Deal found 4/10

$664

Tue 6/109:00 pmIAD - LIS

1 stop19h 35mAer Lingus

Wed 6/1810:15 pmLIS - IAD

1 stop25h 40mAer Lingus

Deal found 4/10

$683

Mon 6/305:25 pmIAD - OPO

1 stop23h 50mDelta

Tue 7/156:35 amOPO - IAD

1 stop17h 40mDelta

Deal found 4/10

$684

Thu 5/224:35 pmIAD - OPO

1 stop10h 00mIberia

Thu 5/298:15 amOPO - IAD

1 stop11h 45mIberia

Deal found 4/10

$685

Last-minute flights from Dulles Intl to Portugal
Discover last-minute flight deals from Dulles Intl to Portugal. Data last updated April 11, 2025 and is based on user searches.

Thu 4/178:30 pmIAD - FAO

3 stops20h 05mMultiple Airlines

Thu 4/247:40 pmFAO - IAD

2 stops24h 40mMultiple Airlines

Deal found 4/10

$871

Thu 4/175:50 pmIAD - FAO

1 stop25h 00mTAP AIR PORTUGAL

Thu 4/246:10 pmFAO - IAD

1 stop26h 10mTAP AIR PORTUGAL

Deal found 4/10

$1,023

Fri 4/189:20 pmIAD - OPO

1 stop18h 15mMultiple Airlines

Tue 4/2211:25 amOPO - IAD

1 stop33h 10mMultiple Airlines

Deal found 4/10

$722

Fri 4/1811:05 pmIAD - OPO

2 stops18h 40mLufthansa

Wed 4/236:00 amOPO - IAD

2 stops18h 25mLufthansa

Deal found 4/10

$798

Fri 4/1810:05 pmIAD - LIS

1 stop29h 55mMultiple Airlines

Fri 5/212:45 pmLIS - IAD

2 stops36h 14mMultiple Airlines

Deal found 4/11

$810

Fri 4/1810:20 pmIAD - LIS

Nonstop7h 20mTAP AIR PORTUGAL

Fri 5/212:00 pmLIS - IAD

Nonstop8h 20mTAP AIR PORTUGAL

Deal found 4/10

$1,051

Fri 4/189:05 pmIAD - LIS

1 stop15h 35mRoyal Air Maroc

Thu 4/249:55 pmLIS - IAD

1 stop26h 10mRoyal Air Maroc

Deal found 4/10

$1,148

Sat 4/196:30 pmIAD - OPO

1 stop16h 00mKLM

Sat 5/36:55 pmOPO - IAD

1 stop25h 40mKLM

Deal found 4/11

$782

Sat 4/195:09 pmIAD - OPO

2 stops17h 21mDelta

Sat 5/36:40 amOPO - IAD

1 stop13h 55mDelta

Deal found 4/11

$786

Sun 4/2010:05 pmIAD - FAO

2 stops30h 50mScandinavian Airlines

Sat 4/2610:15 amFAO - IAD

2 stops38h 44mScandinavian Airlines

Deal found 4/10

$1,187

Sun 4/208:25 pmIAD - FAO

1 stop17h 35mAer Lingus

Sat 4/2611:50 amFAO - IAD

1 stop33h 00mAer Lingus

Deal found 4/10

$1,251

Mon 4/2110:20 pmIAD - OPO

1 stop19h 35mTAP AIR PORTUGAL

Fri 4/259:00 amOPO - IAD

1 stop11h 20mTAP AIR PORTUGAL

Deal found 4/10

$963

One-way flights from Dulles Intl to Portugal
Search for one-way flight options from Dulles Intl to Portugal. Find affordable one-way fares based on user searches. Data last updated April 11, 2025.

Tue 6/38:18 amIAD - LIS

2 stops16h 37mMultiple Airlines

Deal found 4/10

$368

Mon 5/510:20 pmIAD - LIS

Nonstop7h 20mTAP AIR PORTUGAL

Deal found 4/10

$388

Mon 5/1910:05 pmIAD - LIS

1 stop17h 35mScandinavian Airlines

Deal found 4/10

$408

Thu 10/210:20 pmIAD - FNC

1 stop16h 05mMultiple Airlines

Deal found 4/10

$423

Sun 5/119:05 pmIAD - LIS

1 stop15h 35mRoyal Air Maroc

Deal found 4/10

$434

Wed 6/410:20 pmIAD - OPO

1 stop17h 05mTAP AIR PORTUGAL

Deal found 4/10

$463

Tue 6/102:25 pmIAD - OPO

3 stops43h 35mMultiple Airlines

Deal found 4/10

$476

Sat 6/2810:35 pmIAD - FAO

1 stop30h 50mTAP AIR PORTUGAL

Deal found 4/10

$503

Tue 6/171:08 pmIAD - OPO

2 stops13h 27mBritish Airways

Deal found 4/9

$511

Sun 4/208:45 pmIAD - OPO

1 stop16h 30mSWISS

Deal found 4/9

$520

Mon 6/308:18 amIAD - OPO

2 stops20h 17mAir Canada

Deal found 4/10

$528

Sat 6/2810:35 pmIAD - FAO

2 stops19h 55mMultiple Airlines

Deal found 4/10

$529

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Wed 10/1

9:05 pm-9:05 pm

1 stop19h 00m

Lisbon Humberto Delgado

Tue 10/7

6:40 pm-7:05 pm

1 stop29h 25m

$598

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Wed 9/3

10:05 pm-10:10 pm

2 stops19h 05m

Lisbon Humberto Delgado

Wed 9/17

8:00 am-7:59 pm

2 stops16h 59m

$626

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 7/1

8:14 pm-7:30 pm

2 stops18h 16m

Porto

Tue 7/8

8:40 pm-8:10 pm

1 stop28h 30m

$627

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 8/19

5:20 pm-9:45 am

1 stop11h 25m

Porto

Tue 8/26

12:50 pm-11:55 am

2 stops28h 05m

$628

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 9/21

5:10 pm-9:35 am

2 stops35h 25m

Porto

Fri 10/31

11:55 am-5:30 pm

1 stop33h 35m

$631

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 9/24

9:55 am-9:25 am

1 stop18h 30m

Porto

Tue 10/7

6:00 am-9:01 pm

2 stops20h 01m

$632

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 9/9

5:00 pm-10:00 am

1 stop12h 00m

Porto

Sat 10/4

7:00 am-8:05 pm

1 stop18h 05m

$634

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Tue 6/10

4:20 pm-6:30 am

2 stops33h 10m

Lisbon Humberto Delgado

Tue 6/17

8:15 am-3:06 pm

2 stops35h 51m

$636

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Fri 9/5

4:35 pm-11:40 am

1 stop14h 05m

Porto

Fri 9/12

8:15 am-3:00 pm

1 stop11h 45m

$640

Washington, D.C.Ponta Delgada

IAD - PDL

IADPDL

Washington, D.C. Dulles Intl

Tue 9/23

5:00 pm-9:45 am

1 stop12h 45m

Ponta Delgada Nordela

Mon 9/29

7:40 pm-3:20 pm

1 stop23h 40m

$643

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

Showing 1-10 of 60 results

...

Best time to book a flight from Dulles Intl to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Portugal

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Portugal (average of $612). Flying from Washington, D.C. Dulles Intl Airport to Portugal in June is currently the most expensive (average of $1,203). 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 IAD to PT?

One of the essential ways to save on airfare from Washington, D.C. Dulles Intl Airport to Portugal is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 8% on airfare.

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

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

Rainfall in Portugal by month

In terms of precipitation, rainfall in Portugal ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Portugal when rainfall is around 0.2 in.

Temperature in Portugal by month

If weather is an important factor for your trip to Portugal, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Portugal

Read reviews from past customers who have flown Delta, Porter Airlines and KLM from Washington, D.C. to Portugal. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,910 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,910 reviews

Delta

8.0

Very good

7,910 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Porter Airlines

8.0

Very good

280 reviews

Delta

8.0

Very good

7,910 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,321 reviews

Delta

8.0

Very good

7,910 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines

7.6

Good

774 reviews

Delta

8.0

Very good

7,910 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS

7.5

Good

1,575 reviews

Delta

8.0

Very good

7,910 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Portugal one-way?
The cheapest airlines for a one-way flight from Washington, D.C. Dulles Intl Airport to Portugal are TAP AIR PORTUGAL ($388), Scandinavian Airlines ($408), and Royal Air Maroc ($434).
What are the most popular routes from Washington, D.C. Dulles Intl Airport to Portugal?
While some choose either Washington, D.C. Dulles Intl - Porto or Washington, D.C. Dulles Intl - Ponta Delgada Nordela, Washington, D.C. Dulles Intl - Lisbon Humberto Delgado is the most popular route from Washington, D.C. Dulles Intl Airport to Portugal.
What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Portugal?
The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Portugal are JetBlue (79%), TAP AIR PORTUGAL (77%) and Air Canada (73%).
What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Portugal?
Looking for the cheapest flight from Washington, D.C. Dulles Intl Airport to Portugal? While on average our users pay $1,693, our data indicates the cheapest price to be $251. The most popular route (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), is priced around $554.
Can I find deals for flights from Dulles Intl to Portugal that include hotel bookings?
Yes. In addition to deals on Dulles Intl to Portugal flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to Portugal?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Portugal.
Can I find deals for business class flights from Dulles Intl to Portugal?
Yes. Cheapflights offers flight deals from Dulles Intl to Portugal 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 Washington, D.C. Dulles Intl Airport to Portugal?
Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Portugal (average of $612). Flying from Washington, D.C. Dulles Intl Airport to Portugal in June is currently the most expensive (average of $1,203). 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

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Alternative routes for Dulles Intl to Portugal

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Baltimore to Linate flights

Baltimore to Barcelona-El Prat flights

Complete your trip

Portugal car rentals

Madeira car rentals

Azores car rentals

Lisbon Humberto Delgado Airport car rentals

Porto Airport car rentals

Ponta Delgada Nordela Airport car rentals

Lajes Airport car rentals

Lisbon car rentals

Porto car rentals

Funchal car rentals

Ponta Delgada car rentals

Faro car rentals

Top 10 airlines flying from Dulles Intl to Portugal

Airline	Cheapest	Average	Flexibility	On-time
PLAY	Cheapest$332	Average$391	FlexibilityNo cancel fee	On-timeN/A
Air France	Cheapest$422	Average$868	FlexibilityNo cancel fee	On-time77%
Delta	Cheapest$423	Average$835	FlexibilityNo cancel fee	On-timeN/A
KLM	Cheapest$435	Average$676	FlexibilityNo cancel fee	On-time75%
TAP AIR PORTUGAL	Cheapest$457	Average$890	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$536	Average$796	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$538	Average$1,048	FlexibilityNo cancel fee	On-time69%
Lufthansa	Cheapest$538	Average$920	FlexibilityNo cancel fee	On-time76%
British Airways	Cheapest$551	Average$1,062	FlexibilityNo cancel fee	On-time70%
Royal Air Maroc	Cheapest$552	Average$626	FlexibilityNo cancel fee	On-time75%

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$254+ Cheap flights from Dulles Intl (IAD) to Portugal

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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Dulles Intl to Portugal

Keep the following information in mind while searching for Dulles Intl to Portugal flight deals. Data was last updated April 11, 2025.

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Cheapest flights from Dulles Intl to PortugalExplore the most affordable flight options available from Dulles Intl to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

Explore the most affordable flight options available from Dulles Intl to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

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

Best time to book a flight from Dulles Intl to Portugal

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

Cheapflights Insights

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

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

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

Find hourly flight availability from Dulles Intl to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 11, 2025.

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

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Portugal. Price data was last updated on December 16, 2024.

Rainfall in Portugal by month

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

Temperature in Portugal by month

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

Reviews of airlines servicing Portugal

Read reviews from past customers who have flown Delta, Porter Airlines and KLM from Washington, D.C. to Portugal. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Portugal. 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 Washington, D.C. Dulles Intl Airport to Portugal one-way?

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

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

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

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

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

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

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

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Alternative routes for Dulles Intl to Portugal

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Top 10 airlines flying from Dulles Intl to Portugal

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Cheapest flights from Dulles Intl to Portugal
Explore the most affordable flight options available from Dulles Intl to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.