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 ($255), Iberia ($323), and United Airlines ($359).

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.

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).

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 $1,849, our data indicates the cheapest price to be $221. The most popular route (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), is priced around $460.

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 Sunday, 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 78% 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 $968. For sooner than that we have options available in the next 3 days from $1,282.

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 $904. You can even find prices in February for less than $904, as users have found deals to Portugal from as low as $352. 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 43%.

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.

$249+ Flights from Washington, D.C. Dulles Intl Airport to Portugal

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Cheap flight deals from Dulles Intl to Portugal

Round-trip from	$515 (Mytrip)
One-way from	$249 (Mytrip)
Popular in	December
Cheapest in	February
Average price	$1,053
Good round-trip deal	$516 or less
Good one-way deal	$305 or less

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. 2% potential increase in price ($20 potential increase over avg. RT price).

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Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).

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Average for round-trip flights in July 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 julio 29, 2025.

lun. 9/83:41 pmIAD - FAO

2 stops20h 34mMultiple Airlines

lun. 9/158:10 pmFAO - IAD

2 stops22h 20mMultiple Airlines

Deal found 7/27

$515

mar. 12/25:30 pmIAD - FNC

1 stop11h 40mTAP AIR PORTUGAL

lun. 12/84:10 amFNC - IAD

1 stop15h 25mTAP AIR PORTUGAL

Deal found 7/29

$531

vie. 10/1010:20 pmIAD - FAO

1 stop20h 30mTAP AIR PORTUGAL

mar. 10/146:15 pmFAO - IAD

1 stop26h 05mTAP AIR PORTUGAL

Deal found 7/29

$545

mié. 10/155:50 pmIAD - PXO

1 stop12h 20mTAP AIR PORTUGAL

mié. 10/2212:00 pmPXO - IAD

1 stop13h 50mTAP AIR PORTUGAL

Deal found 7/27

$563

mar. 10/144:35 pmIAD - OPO

1 stop14h 05mIberia

mar. 10/288:40 pmOPO - IAD

2 stops28h 15mIberia

Deal found 7/28

$568

mar. 10/1410:20 pmIAD - OPO

1 stop20h 00mLufthansa

mar. 10/2812:30 pmOPO - IAD

1 stop32h 20mLufthansa

Deal found 7/28

$569

lun. 8/189:45 amIAD - OPO

1 stop18h 50mMultiple Airlines

mar. 8/266:00 amOPO - IAD

1 stop14h 50mMultiple Airlines

Deal found 7/29

$574

mié. 8/2012:35 pmIAD - OPO

2 stops15h 45mAir Canada

jue. 9/412:10 pmOPO - IAD

2 stops33h 18mAir Canada

Deal found 7/28

$578

mar. 10/148:09 amIAD - OPO

2 stops18h 26mAmerican Airlines

jue. 10/238:15 amOPO - IAD

1 stop11h 45mAmerican Airlines

Deal found 7/29

$579

mié. 8/208:55 amIAD - OPO

2 stops19h 25mUnited Airlines

vie. 9/56:00 amOPO - IAD

1 stop14h 50mUnited Airlines

Deal found 7/27

$580

lun. 9/155:45 pmIAD - OPO

1 stop18h 15mTAP AIR PORTUGAL

lun. 9/2210:35 pmOPO - IAD

1 stop21h 45mTAP AIR PORTUGAL

Deal found 7/27

$582

sáb. 10/251:00 pmIAD - OPO

2 stops17h 30mDelta

mar. 11/46:05 amOPO - IAD

2 stops15h 26mDelta

Deal found 7/27

$592

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 julio 29, 2025.

lun. 9/83:41 pmIAD - FAO

2 stops20h 34mMultiple Airlines

lun. 9/158:10 pmFAO - IAD

2 stops22h 20mMultiple Airlines

Deal found 7/27

$515

vie. 10/1010:20 pmIAD - FAO

1 stop20h 30mTAP AIR PORTUGAL

mar. 10/146:15 pmFAO - IAD

1 stop26h 05mTAP AIR PORTUGAL

Deal found 7/29

$545

mié. 10/11:30 pmIAD - OPO

1 stop21h 20mTurkish Airlines

mié. 10/84:50 pmOPO - IAD

1 stop23h 55mTurkish Airlines

Deal found 7/29

$568

mar. 10/1410:20 pmIAD - OPO

1 stop20h 00mLufthansa

mar. 10/2812:30 pmOPO - IAD

1 stop32h 20mLufthansa

Deal found 7/28

$569

mié. 8/2012:35 pmIAD - OPO

2 stops15h 45mAir Canada

jue. 9/412:10 pmOPO - IAD

2 stops33h 18mAir Canada

Deal found 7/28

$578

mar. 10/148:09 amIAD - OPO

2 stops18h 26mAmerican Airlines

jue. 10/238:15 amOPO - IAD

1 stop11h 45mAmerican Airlines

Deal found 7/29

$579

mié. 8/208:55 amIAD - OPO

2 stops19h 25mUnited Airlines

vie. 9/56:00 amOPO - IAD

1 stop14h 50mUnited Airlines

Deal found 7/27

$580

dom. 8/174:35 pmIAD - OPO

1 stop14h 05mIberia

mié. 9/38:15 amOPO - IAD

1 stop11h 45mIberia

Deal found 7/27

$589

sáb. 10/251:00 pmIAD - OPO

2 stops17h 30mDelta

mar. 11/46:05 amOPO - IAD

2 stops15h 26mDelta

Deal found 7/27

$592

mar. 9/238:45 pmIAD - OPO

2 stops17h 20mSWISS

mar. 9/308:40 amOPO - IAD

1 stop12h 35mSWISS

Deal found 7/29

$595

dom. 9/148:25 pmIAD - FAO

1 stop17h 35mAer Lingus

mar. 9/2311:45 amFAO - IAD

1 stop12h 45mAer Lingus

Deal found 7/28

$612

lun. 8/116:30 pmIAD - OPO

1 stop16h 00mKLM

mar. 8/194:20 pmOPO - IAD

1 stop28h 15mKLM

Deal found 7/28

$632

Last-minute flights from Dulles Intl to Portugal
Discover last-minute flight deals from Dulles Intl to Portugal. Data last updated julio 29, 2025 and is based on user searches.

dom. 8/310:20 pmIAD - LIS

Nonstop7h 20mTAP AIR PORTUGAL

mié. 8/2712:00 pmLIS - IAD

Nonstop8h 20mTAP AIR PORTUGAL

Deal found 7/28

$748

lun. 8/410:20 pmIAD - OPO

1 stop15h 40mTAP AIR PORTUGAL

dom. 8/106:00 amOPO - IAD

1 stop14h 20mTAP AIR PORTUGAL

Deal found 7/28

$1,046

lun. 8/48:20 amIAD - OPO

2 stops20h 15mUnited Airlines

dom. 8/106:00 amOPO - IAD

1 stop14h 15mUnited Airlines

Deal found 7/28

$1,095

lun. 8/44:35 pmIAD - OPO

1 stop14h 05mIberia

vie. 8/88:15 amOPO - IAD

1 stop11h 45mIberia

Deal found 7/27

$1,098

lun. 8/45:45 pmIAD - PDL

1 stop12h 00mTAP AIR PORTUGAL

vie. 8/157:40 pmPDL - IAD

1 stop23h 40mTAP AIR PORTUGAL

Deal found 7/28

$1,172

mié. 8/610:05 pmIAD - LIS

1 stop31h 30mScandinavian Airlines

mié. 8/208:00 amLIS - IAD

2 stops40h 59mScandinavian Airlines

Deal found 7/27

$1,055

jue. 8/78:25 pmIAD - LIS

1 stop20h 10mAer Lingus

mar. 8/1210:15 pmLIS - IAD

1 stop26h 15mAer Lingus

Deal found 7/27

$923

vie. 8/85:25 pmIAD - OPO

1 stop17h 10mKLM

lun. 8/119:20 amOPO - IAD

2 stops17h 22mKLM

Deal found 7/28

$805

vie. 8/89:05 pmIAD - LIS

1 stop15h 35mMultiple Airlines

vie. 8/2212:00 pmLIS - IAD

Nonstop8h 20mMultiple Airlines

Deal found 7/27

$980

vie. 8/82:25 pmIAD - OPO

2 stops15h 00mMultiple Airlines

lun. 8/117:25 pmOPO - IAD

2 stops25h 25mMultiple Airlines

Deal found 7/28

$983

vie. 8/81:30 pmIAD - LIS

1 stop20h 45mTurkish Airlines

lun. 9/85:55 amLIS - IAD

1 stop18h 50mTurkish Airlines

Deal found 7/29

$1,020

vie. 8/810:20 pmIAD - OPO

1 stop20h 00mLufthansa

lun. 8/1111:05 amOPO - IAD

2 stops33h 45mLufthansa

Deal found 7/28

$1,176

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 julio 29, 2025.

mié. 10/155:50 pmIAD - OPO

2 stops23h 15mMultiple Airlines

Deal found 7/28

$249

lun. 9/2210:20 pmIAD - OPO

1 stop15h 40mTAP AIR PORTUGAL

Deal found 7/28

$255

dom. 9/217:09 pmIAD - LIS

2 stops46h 56mMultiple Airlines

Deal found 7/27

$312

dom. 10/267:00 pmIAD - LIS

1 stop24h 25mIberia

Deal found 7/27

$323

sáb. 9/610:35 pmIAD - FNC

2 stops45h 25mMultiple Airlines

Deal found 7/27

$329

dom. 10/2611:30 pmIAD - LIS

Nonstop7h 05mTAP AIR PORTUGAL

Deal found 7/27

$332

mié. 9/1010:20 pmIAD - PDL

1 stop21h 25mTAP AIR PORTUGAL

Deal found 7/27

$344

mié. 9/1010:20 pmIAD - PDL

3 stops40h 15mMultiple Airlines

Deal found 7/27

$355

mié. 9/38:20 amIAD - OPO

2 stops20h 00mUnited Airlines

Deal found 7/28

$359

dom. 8/35:10 pmIAD - OPO

2 stops35h 25mAir Canada

Deal found 7/27

$365

mié. 9/179:05 pmIAD - LIS

1 stop19h 00mRoyal Air Maroc

Deal found 7/27

$368

dom. 8/318:45 pmIAD - OPO

1 stop16h 30mSWISS

Deal found 7/27

$369

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.Faro

IAD - FAO

IADFAO

Washington, D.C. Dulles Intl

lun. 9/8

3:41 pm-5:15 pm

2 stops20h 34m

Faro

lun. 9/15

8:10 pm-1:30 pm

2 stops22h 20m

$515

Washington, D.C.Faro

IAD - FAO

IADFAO

Washington, D.C. Dulles Intl

vie. 10/10

10:20 pm-11:50 pm

1 stop20h 30m

Faro

mar. 10/14

6:15 pm-3:20 pm

1 stop26h 05m

$545

Washington, D.C.Porto Santo

IAD - PXO

IADPXO

Washington, D.C. Dulles Intl

mié. 10/15

5:50 pm-11:10 am

1 stop12h 20m

Porto Santo

mié. 10/22

12:00 pm-8:50 pm

1 stop13h 50m

$563

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 10/1

1:30 pm-3:50 pm

1 stop21h 20m

Porto

mié. 10/8

4:50 pm-11:45 am

1 stop23h 55m

$568

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mar. 10/14

10:20 pm-11:20 pm

1 stop20h 00m

Porto

mar. 10/28

12:30 pm-4:50 pm

1 stop32h 20m

$569

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

lun. 8/18

9:45 am-9:35 am

1 stop18h 50m

Porto

mar. 8/26

6:00 am-3:50 pm

1 stop14h 50m

$574

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 8/20

12:35 pm-9:20 am

2 stops15h 45m

Porto

jue. 9/4

12:10 pm-4:28 pm

2 stops33h 18m

$578

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mar. 10/14

8:09 am-7:35 am

2 stops18h 26m

Porto

jue. 10/23

8:15 am-3:00 pm

1 stop11h 45m

$579

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 8/20

8:55 am-9:20 am

2 stops19h 25m

Porto

vie. 9/5

6:00 am-3:50 pm

1 stop14h 50m

$580

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

lun. 9/15

5:45 pm-5:00 pm

1 stop18h 15m

Porto

lun. 9/22

10:35 pm-3:20 pm

1 stop21h 45m

$582

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 50 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 $1,129). 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. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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

The most flights from IAD to PT0 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).

Reviews of airlines servicing Portugal

See what other customers who have flown with Delta, KLM, and Air France from Washington, D.C. Dulles Intl Airport to Portugal have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,979 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

7,979 reviews

Delta

8.0

Very good

7,979 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

1,383 reviews

Delta

8.0

Very good

7,979 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

1,465 reviews

Delta

8.0

Very good

7,979 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!

SWISS

7.5

Good

1,683 reviews

Delta

8.0

Very good

7,979 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!

United Airlines

7.4

Good

8,896 reviews

Delta

8.0

Very good

7,979 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 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 ($255), Iberia ($323), and United Airlines ($359).
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 (56%), TAP AIR PORTUGAL (56%) and Air Canada (42%).
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 $1,849, our data indicates the cheapest price to be $221. The most popular route (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), is priced around $460.
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 $1,129). 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Dulles Intl to Portugal

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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$333	Average$384	FlexibilityNo cancel fee	On-timeN/A
Delta	Cheapest$418	Average$785	FlexibilityNo cancel fee	On-timeN/A
KLM	Cheapest$424	Average$690	FlexibilityNo cancel fee	On-time75%
TAP AIR PORTUGAL	Cheapest$473	Average$888	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$508	Average$672	FlexibilityNo cancel fee	On-time71%
British Airways	Cheapest$510	Average$693	FlexibilityNo cancel fee	On-time70%
Iberia	Cheapest$515	Average$766	FlexibilityNo cancel fee	On-time77%
SWISS	Cheapest$542	Average$651	FlexibilityNo cancel fee	On-time79%
United Airlines	Cheapest$543	Average$956	FlexibilityNo cancel fee	On-time69%
Royal Air Maroc	Cheapest$552	Average$643	FlexibilityNo cancel fee	On-time75%

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$249+ 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 10/15. 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 julio 29, 2025.

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Find flight deals from Dulles Intl to Portugal

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 julio 29, 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 julio 29, 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.

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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 julio 29, 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.

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

Explore weekly flight availability from Dulles Intl to Portugal. 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 julio 29, 2025.

Reviews of airlines servicing Portugal

See what other customers who have flown with Delta, KLM, and Air France from Washington, D.C. Dulles Intl Airport to Portugal have to say. You can also see how each airline compares 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 julio 29, 2025.