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$334+ 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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LIS
Jan 21 — Jan 281
Tue 1/21
Tue 1/28
1 adult, Economy
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Cheap flight deals from Dulles Intl to Portugal

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Portugal (PT0). 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 16, 2025.

Round-trip from

$501
(Gotogate)

One-way from

$334
(Kiwi.com)
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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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 January 16, 2025.

This Gotogate deal was found by Cheapflights users on 1/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/207:15 pmIAD - OPO
1 stop9h 45mTAP AIR PORTUGAL
Tue 2/46:55 amOPO - IAD
1 stop12h 35mTAP AIR PORTUGAL
Deal found 1/15$501
This Mytrip deal was found by Cheapflights users on 1/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/182:35 pmIAD - OPO
2 stops22h 55mMultiple Airlines
Tue 2/256:00 amOPO - IAD
2 stops32h 46mMultiple Airlines
Deal found 1/16$508
This Mytrip deal was found by Cheapflights users on 1/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/15:30 pmIAD - FAO
1 stop25h 20mTAP AIR PORTUGAL
Fri 2/1411:15 amFAO - IAD
1 stop14h 45mTAP AIR PORTUGAL
Deal found 1/15$510
This Gotogate deal was found by Cheapflights users on 1/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/183:55 pmIAD - OPO
2 stops15h 10mAir Canada
Tue 2/256:00 amOPO - IAD
2 stops36h 51mAir Canada
Deal found 1/16$516
This United Airlines deal was found by Cheapflights users on 1/16. 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.
Tue 2/188:24 amIAD - OPO
2 stops25h 51mUnited Airlines
Tue 2/256:00 amOPO - IAD
2 stops32h 46mUnited Airlines
Deal found 1/16$537
This KLM deal was found by Cheapflights users on 1/16. 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.
Mon 3/36:30 pmIAD - OPO
1 stop11h 20mKLM
Mon 3/1011:15 amOPO - IAD
1 stop33h 30mKLM
Deal found 1/16$539
This Kiwi.com deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/178:15 pmIAD - LIS
Nonstop7h 05mTAP AIR PORTUGAL
Wed 3/265:15 pmLIS - IAD
Nonstop8h 45mTAP AIR PORTUGAL
Deal found 1/15$561
This Delta deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/221:42 pmIAD - OPO
2 stops16h 08mDelta
Mon 1/2711:15 amOPO - IAD
1 stop33h 30mDelta
Deal found 1/15$563
This Trip.com deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/268:40 pmIAD - LIS
1 stop9h 55mRoyal Air Maroc
Tue 3/45:55 pmLIS - IAD
1 stop29h 45mRoyal Air Maroc
Deal found 1/16$566
This Mytrip deal was found by Cheapflights users on 1/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/1610:30 pmIAD - FNC
1 stop19h 25mTAP AIR PORTUGAL
Thu 2/277:55 amFNC - IAD
1 stop12h 05mTAP AIR PORTUGAL
Deal found 1/15$570
This Gotogate deal was found by Cheapflights users on 1/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/245:20 pmIAD - PDL
1 stop12h 20mTAP AIR PORTUGAL
Wed 4/307:25 pmPDL - IAD
1 stop23h 55mTAP AIR PORTUGAL
Deal found 1/16$570
This Gotogate deal was found by Cheapflights users on 1/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/306:50 pmIAD - OPO
2 stops22h 25mScandinavian Airlines
Wed 4/3012:05 pmOPO - IAD
1 stop12h 54mScandinavian Airlines
Deal found 1/16$576

Find flights from Dulles Intl to Portugal within your budget

Customize your flight search to find flights from Dulles Intl to Portugal 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 16, 2025.

Fly from

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Fly to

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Route

Depart

Return

Price

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 5/20

5:00 pm-5:05 pm

1 stop19h 05m

Porto

Mon 5/26

10:55 pm-3:20 pm

1 stop21h 25m

$497

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 2/18

2:35 pm-6:30 pm

2 stops22h 55m

Porto

Tue 2/25

6:00 am-9:46 am

2 stops32h 46m

$508

Washington, D.C.Faro

IAD - FAO

IADFAO

Washington, D.C. Dulles Intl

Sat 2/1

5:30 pm-11:50 pm

1 stop25h 20m

Faro

Fri 2/14

11:15 am-9:00 pm

1 stop14h 45m

$510

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 2/18

3:55 pm-12:05 pm

2 stops15h 10m

Porto

Tue 2/25

6:00 am-1:51 pm

2 stops36h 51m

$516

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 2/18

8:24 am-3:15 pm

2 stops25h 51m

Porto

Tue 2/25

6:00 am-9:46 am

2 stops32h 46m

$537

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 3/3

6:30 pm-10:50 am

1 stop11h 20m

Porto

Mon 3/10

11:15 am-4:45 pm

1 stop33h 30m

$539

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 3/30

8:45 pm-11:25 am

1 stop33h 40m

Porto

Mon 4/7

7:20 pm-4:15 pm

1 stop25h 55m

$556

Washington, D.C.Ponta Delgada

IAD - PDL

IADPDL

Washington, D.C. Dulles Intl

Mon 2/17

7:15 pm-6:35 pm

1 stop19h 20m

Ponta Delgada Nordela

Wed 2/26

6:35 am-9:00 pm

1 stop18h 25m

$564

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Wed 2/19

8:40 pm-11:35 am

1 stop9h 55m

Lisbon Humberto Delgado

Tue 2/25

5:55 pm-6:40 pm

1 stop29h 45m

$566

Washington, D.C.Funchal

IAD - FNC

IADFNC

Washington, D.C. Dulles Intl

Sun 2/16

10:30 pm-10:55 pm

1 stop19h 25m

Funchal Madeira

Thu 2/27

7:55 am-3:00 pm

1 stop12h 05m

$570

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/16

Showing 1-10 of 60 results
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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.

Travel insights for flights from Dulles Intl to Portugal

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

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 $1,247). 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?

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 January 16, 2025.

When flying from Washington, D.C. Dulles Intl Airport to Portugal, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Portugal by month

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

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

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated January 16, 2025.
Read reviews from past customers who have flown Scandinavian Airlines, Turkish Airlines and Royal Air Maroc 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
8,511 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

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

Delta
8.0
Very good
8,511 reviews
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

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

KLM
7.8
Good
1,339 reviews
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

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

Austrian Airlines
7.6
Good
786 reviews
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

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

SWISS
7.5
Good
1,598 reviews
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

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

Air France
7.4
Good
1,487 reviews
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

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

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?

    The cheapest airlines for a one-way flight from Washington, D.C. Dulles Intl Airport to Portugal are Royal Air Maroc ($379), Icelandair ($391), and TAP AIR PORTUGAL ($393).

  • 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 - Faro, 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 (70%), TAP AIR PORTUGAL (70%) and Air Canada (59%).

  • 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 $1,456, our data indicates the cheapest price to be $362. The most popular route (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), is priced around $470.

  • 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 $1,247). 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

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Heathrow flights
Dulles Intl to Charles de Gaulle flights
Baltimore to Heathrow flights
Dulles Intl to Leonardo da Vinci/Fiumicino flights
Dulles Intl to Athens flights
Reagan-National to Heathrow flights
Dulles Intl to Gatwick flights
Dulles Intl to Madrid flights
Dulles Intl to London City flights
Dulles Intl to Dublin flights
Dulles Intl to Istanbul flights
Reagan-National to Charles de Gaulle flights
Baltimore to Gatwick flights
Dulles Intl to Orly flights
Baltimore to Charles de Gaulle flights
Dulles Intl to Lisbon flights
Dulles Intl to Barcelona-El Prat flights
Dulles Intl to Amsterdam flights
Baltimore to Stansted flights
Reagan-National to Gatwick flights
Dulles Intl to Frankfurt flights
Reagan-National to Leonardo da Vinci/Fiumicino flights
Reagan-National to Orly flights
Baltimore to Leonardo da Vinci/Fiumicino flights
Dulles Intl to Keflavik Intl flights
Reagan-National to Madrid flights
Baltimore to Madrid flights
Reagan-National to Lisbon flights
Reagan-National to Athens flights
Baltimore to Athens flights
Baltimore to Lisbon flights
Dulles Intl to Zurich flights
Baltimore to Keflavik Intl flights
Reagan-National to Dublin flights
Baltimore to Dublin flights
Dulles Intl to Bruxelles-National flights
Dulles Intl to Copenhagen flights
Dulles Intl to Malpensa flights
Reagan-National to Istanbul flights
Reagan-National to Keflavik Intl flights
Dulles Intl to Edinburgh flights
Baltimore to Barcelona-El Prat flights
Reagan-National to Barcelona-El Prat flights
Baltimore to Istanbul flights
Dulles Intl to Vicenza flights
Baltimore to Amsterdam flights
Dulles Intl to Munich flights
Dulles Intl to Linate flights
Dulles Intl to Geneva flights
Reagan-National to Amsterdam flights

Top 10 airlines flying from Dulles Intl to Portugal

Discover the top 10 airlines that operate flights from Dulles Intl to Portugal. 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$306Average$381FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$422Average$831FlexibilityNo cancel feeOn-time77%
DeltaCheapest$424Average$835FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$430Average$701FlexibilityNo cancel feeOn-time75%
IberiaCheapest$430Average$705FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$459Average$923FlexibilityNo cancel feeOn-timeN/A
Royal Air MarocCheapest$519Average$572FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$538Average$988FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$538Average$908FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$539Average$716FlexibilityNo cancel feeOn-time70%
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