What is the cheapest airline that flies from Portugal to Washington, D.C. Dulles Intl?

TAP AIR PORTUGAL and Royal Air Maroc are the most popular carriers operating from Portugal to Washington, D.C. Dulles Intl

What airlines fly to Washington, D.C. Dulles Intl Airport?

TAP AIR PORTUGAL, United Airlines and Lufthansa are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from Portugal according to our data. TAP AIR PORTUGAL is the first choice among our users, with 58% of people opting to fly with this airline when traveling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 3 different airlines that fly to Washington, D.C. Dulles Intl Airport on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Washington, D.C. Dulles Intl Airport?

Flight times from Portugal to Washington, D.C. Dulles Intl Airport vary, but if you’re flying out of Porto and flying into Baltimore (one of the most popular routes), then the duration is 15h 37m on average. Another popular route from Portugal to Washington, D.C. Dulles Intl Airport is flying from Lisbon to Baltimore, which will take roughly 16h 10m. Keep in mind that layovers or delays could extend your travel time.

When did momondo last update prices for flights from Portugal to Washington, D.C. Dulles Intl Airport?

Prices for flights from Portugal to Washington, D.C. Dulles Intl Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Portugal to Washington, D.C. Dulles Intl Airport?

There are 3 operators available for flights from Portugal to Washington, D.C. Dulles Intl Airport as of July 2025.

How old do you have to be to fly from Portugal to Washington, D.C. Dulles Intl Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portugal to Washington, D.C. Dulles Intl Airport.

What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

The necessary travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$337 Cheap Flights from Portugal to Washington, D.C. Dulles Intl Airport in 2025

Q: How many flights depart from Portugal to Washington, D.C. Dulles Intl Airport on average per week?

As of July 2025, there are 42 flights per week flying from Portugal to Washington, D.C. Dulles Intl Airport. The most common day of the week flights depart is Mon, with 17% of flights taking off on this day.

Q: How many flights depart from Portugal to Washington, D.C. Dulles Intl Airport on average per day?

As of July 2025, 6 flights take off from Portugal and land in Washington, D.C. Dulles Intl Airport each day. The most common flight departure time for this route is 12:00PM, with 100% of daily flights taking off in the afternoon.

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Last minute

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Recent round-trip flight deals from Portugal to Washington, D.C.

9:15 pm - 3:20 pmOPO-IAD

23h 05m1 stop

10:35 pm - 5:00 pmIAD-OPO

13h 25m1 stop

$478TAP AIR PORTUGAL

Find Deal

Thu, Sep 4 - Sat, Sep 20

9:15 pm - 3:20 pmOPO-IAD

23h 05m1 stop

10:20 pm - 5:05 pmIAD-OPO

13h 45m1 stop

$482TAP AIR PORTUGAL

Find Deal

Thu, Sep 18 - Wed, Oct 1

5:00 am - 3:35 pmLIS-IAD

15h 35m1 stop

8:17 pm - 5:55 pmIAD-LIS

16h 38m2 stops

$537Delta

Find Deal

Thu, Sep 11 - Sat, Sep 27

7:30 pm - 3:35 pmLIS-IAD

25h 05m1 stop

9:20 pm - 5:55 pmIAD-LIS

15h 35m1 stop

$539

Find Deal

Sat, Sep 13 - Sat, Sep 20

5:00 am - 7:37 pmLIS-IAD

19h 37m2 stops

8:17 pm - 5:55 pmIAD-LIS

16h 38m2 stops

$542Delta

Find Deal

Thu, Sep 11 - Sat, Sep 27

8:25 am - 3:00 pmLIS-IAD

11h 35m1 stop

7:20 pm - 10:30 pmIAD-LIS

23h 10m1 stop

$550

Find Deal

Fri, Oct 24 - Sat, Nov 1

5:05 am - 3:50 pmLIS-IAD

15h 45m1 stop

10:20 pm - 10:35 amIAD-LIS

7h 15mnonstop

$552United Airlines

Find Deal

Thu, Sep 11 - Sat, Sep 27

5:05 am - 1:30 pmLIS-IAD

13h 25m1 stop

10:20 pm - 9:50 pmIAD-LIS

18h 30m1 stop

$553United Airlines

Find Deal

Mon, Sep 1 - Mon, Sep 15

5:05 am - 3:50 pmLIS-IAD

15h 45m1 stop

10:20 pm - 10:35 amIAD-LIS

7h 15mnonstop

$565Lufthansa

Find Deal

Thu, Sep 11 - Sat, Sep 27

6:00 am - 3:50 pmOPO-IAD

14h 50m1 stop

6:00 pm - 3:05 pmIAD-OPO

16h 05m1 stop

$569Lufthansa

Find Deal

Wed, Dec 24 - Sat, Jan 3

KLM flights from Portugal to Washington, D.C. Dulles Intl Airport

Our best KLM deals on Portugal to Washington, D.C. Dulles Intl Airport flight tickets

KLM

Aug 29

LIS7:30 pmLisbon Humberto Delgado

25h 05m

1 stop

IAD3:35 pmWashington, D.C. Dulles Intl

Sep 13

IAD5:25 pmWashington, D.C. Dulles Intl

12h 30m

1 stop

LIS10:55 amLisbon Humberto Delgado

$551

Find similar

KLM

Aug 24

OPO5:00 amPorto

15h 35m

1 stop

IAD3:35 pmWashington, D.C. Dulles Intl

Aug 31

IAD6:30 pmWashington, D.C. Dulles Intl

16h 00m

1 stop

OPO3:30 pmPorto

$636

Find similar

KLM

Aug 10

LIS7:30 pmLisbon Humberto Delgado

25h 05m

1 stop

IAD3:35 pmWashington, D.C. Dulles Intl

Aug 23

IAD12:13 pmWashington, D.C. Dulles Intl

14h 47m

1 stop

LIS8:00 amLisbon Humberto Delgado

$692

Find similar

SWISS flights from Portugal to Washington, D.C. Dulles Intl Airport

Our best SWISS deals on Portugal to Washington, D.C. Dulles Intl Airport flight tickets

SWISS

Sep 18

OPO8:40 amPorto

12h 35m

1 stop

IAD4:15 pmWashington, D.C. Dulles Intl

Oct 1

IAD5:45 pmWashington, D.C. Dulles Intl

15h 00m

2 stops

OPO1:45 pmPorto

$610

Find similar

SWISS

Sep 1

LIS5:55 amLisbon Humberto Delgado

15h 20m

1 stop

IAD4:15 pmWashington, D.C. Dulles Intl

Sep 15

IAD5:45 pmWashington, D.C. Dulles Intl

15h 00m

2 stops

LIS1:45 pmLisbon Humberto Delgado

$613

Find similar

SWISS

Oct 10

OPO7:55 pmPorto

23h 30m

2 stops

IAD2:25 pmWashington, D.C. Dulles Intl

Oct 23

IAD5:45 pmWashington, D.C. Dulles Intl

15h 00m

2 stops

OPO1:45 pmPorto

$653

Find similar

momondo 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

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 9/4

9:15 pm-3:20 pm

1 stop23h 05m

Washington, D.C. Dulles Intl

Sat 9/20

10:35 pm-5:00 pm

1 stop13h 25m

$478

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 9/18

9:15 pm-3:20 pm

1 stop23h 05m

Washington, D.C. Dulles Intl

Wed 10/1

10:20 pm-5:05 pm

1 stop13h 45m

$482

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

Sat 9/27

8:17 pm-5:55 pm

2 stops16h 38m

$537

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Sat 9/13

7:30 pm-3:35 pm

1 stop25h 05m

Washington, D.C. Dulles Intl

Sat 9/20

9:20 pm-5:55 pm

1 stop15h 35m

$539

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 9/11

5:00 am-7:37 pm

2 stops19h 37m

Washington, D.C. Dulles Intl

Sat 9/27

8:17 pm-5:55 pm

2 stops16h 38m

$542

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 10/24

8:25 am-3:00 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Sat 11/1

7:20 pm-10:30 pm

1 stop23h 10m

$550

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 9/11

5:05 am-3:50 pm

1 stop15h 45m

Washington, D.C. Dulles Intl

Sat 9/27

10:20 pm-10:35 am

Nonstop7h 15m

$552

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Mon 9/1

5:05 am-1:30 pm

1 stop13h 25m

Washington, D.C. Dulles Intl

Mon 9/15

10:20 pm-9:50 pm

1 stop18h 30m

$553

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 9/11

5:05 am-3:50 pm

1 stop15h 45m

Washington, D.C. Dulles Intl

Sat 9/27

10:20 pm-10:35 am

Nonstop7h 15m

$565

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 12/24

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Sat 1/3

6:00 pm-3:05 pm

1 stop16h 05m

$569

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Portugal to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

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

In general, March is the cheapest month to fly from Portugal to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $600. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of March, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $635.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Wednesday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $712. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Portugal to Washington, D.C. Dulles Intl Airport for around $876.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from Portugal at noon is the least expensive time of day to depart. momondo users have found prices as low as $484 when looking at flights departing at noon. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $777 on average. Flights to Washington, D.C. Dulles Intl Airport from Portugal in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Portugal to Washington, D.C. Dulles Intl flight route?

Fly from Lisbon Humberto Delgado to Washington, D.C. Dulles Intl for the best Portugal - Washington, D.C. Dulles Intl flight prices

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

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from Portugal when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around $713 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from Portugal for as low as $581 on momondo.

What cabin class options are available on Portugal to Washington, D.C. Dulles Intl flights?

There are 3 cabin classes available to choose from on Portugal to Washington, D.C. Dulles Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Portugal to Washington, D.C. Dulles Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portugal to Washington, D.C. Dulles Intl Airport

Best Price Found	$337
Fastest flight time	8h 15m
Direct flights	Every day

The best one-way flight to Washington, D.C. Dulles Intl Airport from Portugal in the past 72 hours is $337. The best round-trip flight deal from Portugal to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $478.

The fastest flight from Portugal to Washington, D.C. Dulles Intl Airport takes 8h 15m

Direct flights go from Portugal to Washington, D.C. Dulles Intl Airport every day.

Search flight deals

When did momondo last update prices for flights from Portugal to Washington, D.C. Dulles Intl Airport?
Prices for flights from Portugal to Washington, D.C. Dulles Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Portugal to Washington, D.C. Dulles Intl Airport?
There are 3 operators available for flights from Portugal to Washington, D.C. Dulles Intl Airport as of July 2025.
How old do you have to be to fly from Portugal to Washington, D.C. Dulles Intl Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portugal to Washington, D.C. Dulles Intl Airport.
What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?
The necessary travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Portugal to Washington, D.C. Dulles Intl Airport?
momondo data reveals that the most frequently booked plane model on the route from Portugal to Washington, D.C. Dulles Intl Airport is Boeing 767-400, representing 32.91% of all bookings. The subsequent popular models are Airbus A321neo at 25.44%, Airbus A321-100/200 at 12.24%, and Boeing 767-300 at 9.06%.

Best airlines flying from Portugal to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Portugal to Washington, D.C. Dulles Intl Airport with momondo

Airline	Rating	Free Cancellation	Price
TAP AIR PORTUGAL	PriceFrom $492	Free Cancellation	Rating 7.1 1,933 reviews	Search TAP AIR PORTUGAL flights
United Airlines	PriceFrom $534	Free Cancellation	Rating 7.4 8,900 reviews	Search United Airlines flights
Lufthansa	PriceFrom $536	Free Cancellation	Rating 6.8 7,275 reviews	Search Lufthansa flights

Alexandria

Gettysburg

Arlington

National Harbor

Winchester

Woodbridge

Laurel

Tysons

Silver Spring

Waldorf

Fredericksburg

Manassas

Harpers Ferry

Towson

Rockville

Colonial Beach

Gaithersburg

Fairfax

Reston

Glen Burnie

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momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portugal to Washington, D.C.. momondo saves you time and could save you money on your trip.

Can I find flights from Portugal to Washington, D.C. with flexible booking policies on momondo?

Yes. All flights to Washington, D.C. from Portugal on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Portugal to Washington, D.C.?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington, D.C. from Portugal.

I’m not ready to book a flight from Portugal to Washington, D.C. right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Washington, D.C. from Portugal. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Cheap flights from Portugal to Washington, D.C. from $337

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portugal to Washington, D.C. departing on 10/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Find the cheapest flights from Portugal to Washington, D.C.

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KLM flights from Portugal to Washington, D.C. Dulles Intl Airport

Our best KLM deals on Portugal to Washington, D.C. Dulles Intl Airport flight tickets

SWISS flights from Portugal to Washington, D.C. Dulles Intl Airport

Our best SWISS deals on Portugal to Washington, D.C. Dulles Intl Airport flight tickets

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

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How to get the cheapest flight ticket from Portugal to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

What is the cheapest Portugal to Washington, D.C. Dulles Intl flight route?

Fly from Lisbon Humberto Delgado to Washington, D.C. Dulles Intl for the best Portugal - Washington, D.C. Dulles Intl flight prices

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

What cabin class options are available on Portugal to Washington, D.C. Dulles Intl flights?

There are 3 cabin classes available to choose from on Portugal to Washington, D.C. Dulles Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

What is the cheapest airline that flies from Portugal to Washington, D.C. Dulles Intl?

TAP AIR PORTUGAL and Royal Air Maroc are the most popular carriers operating from Portugal to Washington, D.C. Dulles Intl

What airlines fly to Washington, D.C. Dulles Intl Airport?

How many flights depart from Portugal to Washington, D.C. Dulles Intl Airport on average per day?

As of July 2025, 6 flights take off from Portugal and land in Washington, D.C. Dulles Intl Airport each day. The most common flight departure time for this route is 12:00PM, with 100% of daily flights taking off in the afternoon.

How many flights depart from Portugal to Washington, D.C. Dulles Intl Airport on average per week?

As of July 2025, there are 42 flights per week flying from Portugal to Washington, D.C. Dulles Intl Airport. The most common day of the week flights depart is Mon, with 17% of flights taking off on this day.

How long does it take to fly to Washington, D.C. Dulles Intl Airport?

Cheap Portugal to Washington, D.C. Dulles Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portugal to Washington, D.C. Dulles Intl Airport

Best Price Found

Fastest flight time

Direct flights

When did momondo last update prices for flights from Portugal to Washington, D.C. Dulles Intl Airport?

How many operators does momondo search for flights from Portugal to Washington, D.C. Dulles Intl Airport?

How old do you have to be to fly from Portugal to Washington, D.C. Dulles Intl Airport?

What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

What is the most popular plane model from Portugal to Washington, D.C. Dulles Intl Airport?

Best airlines flying from Portugal to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Portugal to Washington, D.C. Dulles Intl Airport with momondo

Traveling to a place near Washington, D.C.?

Why use momondo?

Why should I use momondo to find a flight deal from Portugal to Washington, D.C.?

Can I find flights from Portugal to Washington, D.C. with flexible booking policies on momondo?

How can momondo help me find flights from Portugal to Washington, D.C.?

I’m not ready to book a flight from Portugal to Washington, D.C. right now. Can momondo alert me if prices change?

An easier way to manage your Washington, D.C. Dulles Intl Airport trip

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Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Washington, D.C.

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Popular flights according to clicks in the last 7 days on momondo