$268 Find Cheap Flights from Washington, D.C. to Portugal

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Portugal departing on 12/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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Cheap Flights from Washington, D.C. to Portugal

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Lisbon
Lisbon3 stops$503
Porto
Porto2 stops$484
Ponta Delgada
Ponta Delgada1 stop$557
Faro
Faro1 stop$529
Funchal
Funchal2 stops$650
Vila do Porto
Vila do Porto3 stops$1,104
Velas
Velas3 stops$883
Lisbon
Lisbon3 stops$503
Porto
Porto2 stops$484
Ponta Delgada
Ponta Delgada1 stop$557
Faro
Faro1 stop$529
Funchal
Funchal2 stops$650
Vila do Porto
Vila do Porto3 stops$1,104
Velas
Velas3 stops$883

Book Cheap Washington, D.C. to Portugal Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Portugal that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Mon, Nov 24 - Fri, Dec 5
United Airlines Logo
6:15 am - 9:30 amBWI-OPO
22h 15m2 stops
United Airlines Logo
6:00 am - 9:08 pmOPO-BWI
20h 08m2 stops
$484United Airlines
Find Deal
Wed, Nov 19 - Tue, Dec 16
Multiple Airlines Logo
5:25 pm - 11:15 amIAD-OPO
12h 50m1 stop
Multiple Airlines Logo
12:30 pm - 11:21 pmOPO-IAD
15h 51m2 stops
$488Multiple Airlines
Find Deal
Wed, Nov 19 - Tue, Dec 16
United Airlines Logo
6:15 am - 9:30 amBWI-OPO
22h 15m2 stops
United Airlines Logo
6:00 am - 5:25 pmOPO-BWI
16h 25m2 stops
$488United Airlines
Find Deal
Tue, Nov 11 - Tue, Nov 18
Delta Logo
12:36 pm - 10:30 amIAD-OPO
16h 54m2 stops
Delta Logo
11:15 am - 12:16 amOPO-IAD
18h 01m2 stops
$492Delta
Find Deal
Wed, Feb 11 - Wed, Feb 25
Delta Logo
10:54 am - 10:30 amBWI-OPO
18h 36m2 stops
Delta Logo
6:00 am - 10:59 pmOPO-BWI
21h 59m2 stops
$492Delta
Find Deal
Thu, Feb 12 - Wed, Feb 18
TAP AIR PORTUGAL Logo
5:30 pm - 9:55 amIAD-OPO
11h 25m1 stop
TAP AIR PORTUGAL Logo
10:55 am - 9:00 pmOPO-IAD
15h 05m1 stop
$497TAP AIR PORTUGAL
Find Deal
Thu, Jan 15 - Sun, Jan 18
Lufthansa Logo
6:00 pm - 11:40 amIAD-OPO
12h 40m1 stop
Lufthansa Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
$513Lufthansa
Find Deal
Fri, Feb 20 - Sat, Feb 28
Lufthansa Logo
6:00 pm - 2:45 pmIAD-OPO
15h 45m1 stop
Lufthansa Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
$516Lufthansa
Find Deal
Sat, Feb 7 - Sat, May 9
TAP AIR PORTUGAL Logo
5:30 pm - 6:55 pmIAD-OPO
20h 25m1 stop
TAP AIR PORTUGAL Logo
5:05 am - 8:05 pmOPO-IAD
20h 00m1 stop
$519TAP AIR PORTUGAL
Find Deal
Sun, Jan 18 - Wed, Jan 28
Royal Air Maroc Logo
8:45 pm - 11:35 amIAD-LIS
9h 50m1 stop
Royal Air Maroc Logo
11:35 am - 6:45 pmLIS-IAD
12h 10m1 stop
$596Royal Air Maroc
Find Deal
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Portugal flights

Get data-powered insights and trends into flights from Washington, D.C. to Portugal to help you find the cheapest flights, the best time to fly and much more.

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

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Portugal from Washington, D.C. found in the last 72 hours was to Lisbon, at $380 round-trip. The most popular route is from Washington, D.C. Dulles Intl Airport (IAD) to Lisbon (LIS), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $380.

Can I save money by flying with a layover from Washington, D.C. to Portugal?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $893 on average.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. to Portugal, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. to Portugal is February, when tickets cost $681 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of round-trip tickets is $1,321 and $1,228 respectively.

What’s the cheapest day of the week to fly from Washington, D.C. to Portugal?

The average price of all round-trip flights from Washington, D.C. to Portugal clicked on KAYAK for each day over the last 12 months.

When flying from Washington, D.C. to Portugal, you should consider leaving on a Monday and avoid Fridays if you are looking for the best rates. For your return to Washington, D.C., you’ll find the best rates on Sundays and the most expensive ones on Mondays.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. to Portugal, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Washington, D.C. to Portugal, you should book around 7 weeks before departure, which saves you about 17% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$268
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 9% increase in price.
Flight from Baltimore to Lisbon

FAQs - booking Portugal flights

  • Which airport in Portugal offers free wheelchair services?

    Due to a requirement by the European Union that mandates all airports in the region to provide free accessibility services to travelers with disabilities and reduced mobility, you will be able to receive free wheelchair services at any airport in the country upon request. Simply reserve one by informing your airline or travel agent at least 48 hours before departure.

  • Are there any airlines offering direct flights on this route?

    While most of the flights from Washington D.C. to Portugal have at least one layover in between, you can still get a direct flight on this route. TAP Air Portugal, Lufthansa, and United Airlines are the only airlines offering direct trips. All flights come from Dulles International Airport (IAD) and land at Humberto Delgado Airport (LIS).

  • Which international airlines have a lounge at IAD Airport?

    There are ten lounges at IAD Airport where you can hang out while waiting to board your flight. United Airlines has four lounges, three of which are located in Concourse C while the fourth one is in Concourse D. Air France and KLM have a joint lounge in Concourse A opposite Gate A22 while the Virgin Atlantic Clubhouse is on the same concourse near Gate A32. Turkish Airlines, British Airways, and Lufthansa lounges are all in Concourse B.

  • Which is the closest airport to downtown Washington D.C?

    The closest airport to downtown Washington D.C is DCA. If you're coming from that region, you should consider booking a flight that flies out of DCA. It is also worth mentioning that DCA is the least busy airport compared to BWI and IAD. However, only IAD offers direct flights from Washington to Portugal.

  • How does KAYAK find such low prices on flights from Washington, D.C. to Portugal?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington, D.C. to Portugal.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Portugal?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Washington, D.C. to Portugal is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington, D.C. to Portugal?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Washington, D.C. to Portugal with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Portugal?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Washington, D.C. to Portugal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Portugal?

    The cheapest time of day to fly to Portugal is generally in the afternoon, when round-trip flights cost $661 on average. Morning departures are around 4% cheaper than evening flights, on average. The most expensive time of day to fly to Portugal is generally at night, which is peak travel time and where the average cost of a ticket is $839.

Top tips for finding cheap flights to Portugal

  • When flying out of Washington, you have the choice between Ronald Reagan Washington Airport (DCA), Dulles Airport (IAD), and Thurgood Marshall Airport (BWI). All three airports offer flights from Washington D.C to Portugal.
  • Humberto Delgado Airport (LIS) is the best airport to land in Portugal if you want access to most attractions in the country. This is because the airport is located in the country’s capital and provides flight, train, and bus connections to other major cities in Portugal.
  • When traveling with your pet through BWI Airport, you will find pet relief areas both indoors past security and outdoors. There are two indoor pet relief areas; one is located in the Concourse D/E connector immediately after the checkpoint while the other can be found at the entrance of Concourse C.
  • Any nursing moms traveling through DCA will be happy to know that the airport has several private nursing suites where you can breastfeed your child. There’s one in Terminal A just before the security checkpoints and another two in Terminal B near Touch of Color on National Hall.
  • As long as you don’t plan on staying in Portugal for longer than 90 days, you won’t need a visa to be allowed into the country. However, a passport remains a necessity and it should have at least six months of validity left in it.

Reviews of the top 5 airlines serving from Washington, D.C. to Portugal

 
Need help choosing which airline to fly with from Washington, D.C. to Portugal? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 7998 reviews
8.5Crew
8.2Boarding
7.9Comfort
7.9Entertainment
7.3Food
Airline reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

8.0 ExcellentJulie, Oct 2025LAX - SFO
Read more Delta reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The aircraft interior is old and tired on this aircraft. The entertainment system never worked despite the crews attempt to reset the system.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Old plane and old configuration/seats but still comfortable for a morning flight

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

We were given vouchers we couldn’t use with a 5.5 hour delay

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

My experience with Aer Lingus was not too good. First, because of the last minute delayed flight from Amsterdam to Dublin we almost missed our flight from Dublin to Philadelphia. Secondly, the flight from Dublin to Philadelphia had very uncomfortable seats especially it was a very long flight. My buttocks were constantly in pain for sitting on these seats for this long. Lastly, the service in the plane was also slow. I asked for a second cup of water and the hostess told me he'll be right back with that where it took him over an hour to come back with water. It was warm in the plane and I was very thirsty. Overall this airline needs much improvement in their services.

Staff was generally friendly and helpful. Attendants collecting trash were somewhat inattentive though.

UNDERPRISER IS A CRIMINAL ORGANIZATION. I WILL NEVER LET THEM MANAGE ANOTHER TRIP. THEY ESSENTIALLY WERE TRYING TO EXTORT ME FOR "Permission" FROM THEM not TO USE MY ROME TO DUBLIN FLIGHT. I did not use this flight, and despite many communications with both Aer Lingus and Underpricers, to the end, they insisted I could not do this, while Aer Lingus kept telling me there was no problem. And in fact, I had zero problems catching that second leg of the trip home from Dublin to LAX.. As if harrassment, underpricers sent me a rude and insensitve email insisting Aer Lingus would not honor the flight home to LAX from DUB. ON THE MORNING OF THE TRAVEL!!! KAYAK SHOULD NOT USE UNDERPRICER "services" They are dishonest and sadistic.

Fast and sensible boarding was absolutely amazing. But extortionate wifi and seats that barely moved, making me unable to sleep, didn't do a lot of favors.

Dinner was fabulous. Would have enjoyed a wine with it. None offered... for sale??? Breakfast was disappointing but adequate amount of food.

Excellent flight and crew. Boarding at Dublin Airport was a very difficult trying to find the right gate.

I liked the front row seats. A lot of leg room. The check-in window needs to be longer

Too hot. Asked for an extra glass of water and was ignored. Asked to sit in empty seats that were open because it was so hot and crowded and was denied and the seats were empty the entire flight

Terrible leg room - I’m 5’3” and my knees were touching the seat in front of me. When the person sitting in front of me leaned back, there was about 15 inches of space between my head and the TV screen which made it awkward to view movies. Last year they had decent food, but this year the only tasty item on the trip was dessert.

The flight was delayed leaving Philadelphia due to “catering” and consequently arrived in Dublin some 75 minutes later than scheduled. Consequently this caused me to miss my connecting flight to Glasgow and I had to spend the night in Dublin.

Did not enjoy the meal provided. The aircraft was dirty. For instance, the screen seemed to have been cleaned with a dirty rag. Disgusting.

The business class seats were smaller and closer together than other airlines.

Boarding- Good Seat Comfort - OK Crew - Good Food - Mediocre On Time - Very Good

Didn't like much. Wheelchair assistance was almost nonexistent. No one at TAP check in process helpful. On the plane, stewards were not friendly and disorganized. Food was terrible for 8 hr flight. We were skipped at snack time and even though we tried to get attention using overhead call system no one even looked up at us to acknowledge. Being at the back of first section and by the lavatory we only were able to request when they came to pick up everyone else's garbage and they were nonchalant...no apology or even choice. The 1/2 half bread with slice of cheese was a waste. Deplaning was horrible but I'll blame lisbon airport for that. Plane left late at made good time still arrived about 15 behind schedule and for using remote deplaning and bus to terminal took another 20 min to gate. Those with connections were highly stressed. Took us 2 hrs from landing to get to ground transportation and exit airport. And that was with wheelchair assistance.

Bad boarding, threat to force bag check mid journey, lines, late, buses, more waiting awful end to end.

Check in was excellent thanks to the team at the check in counter. I was disappointed to see that one has to pay for coffee on the flight. This is the first time I have seen that after 60 years of flying.

Our steward Margarida who served us from Lisbon to Boston was absolutely fantastic! She deserves a raise. Conscientious and thorough as well as showing appropriate attention for every need.

An old airplane with very uncomfortable seats in the Comfort “class! Small, narrow, and hard seat. Entertainment options are inferior, old movies. Boarding started at the back of the airplane, as we entered the aircraft last instead of after business class, risking the possibility that the comfort section would not have room for carry-on in the overhead bin. The food was ok. White wine was terrible. Overall, the flight felt worse than cheap airliners, and the price was as high as premium carriers.

I will avoid TAP if I can, the ground experience was very poor with bad behaviour from the ground crew and it was only a bit better on the aircraft.

I had a business class ticket from EWR to Madrid with a layover at LIS for 11 hours. It was obvious that I needed to pick up my luggage in Lisbon for 11 hours and check it in again when boarding the second flight to Madrid. Before buying the ticket, I called TAP customer service. Customer service assured me that I could get my luggage in Lisbon. When I arrived at Newark airport, I immediately asked to check my luggage to Lisbon. However, the TAP employee refused me, saying that I should resolve this issue upon arrival in Lisbon. She checked my luggage to Madrid. I asked the TAP employee at the gate to help me when boarding the plane, I asked the flight attendants manager on board the plane to help me. All the employees refused to help me and said that I should resolve this issue in Lisbon. It took me 4 hours to resolve this issue in Lisbon. I arrived at 11am and they didn't give me my luggage until 3pm. As a result, I was so tired after a sleepless night on the plane and 4 hours on my feet at the airport and all my plans were ruined that I couldn't fly to Madrid. It was a terrible experiance,

the whole flight is bad from Miami to Casablanca and from casablanca to Miami. Delays, service, food, .... Not flying again with this airline

Intersting crew: only men with a bit of roughness. The food was not bad, but there´s no alcohol option

The food was disappointing, and the airplane appeared old, with torn seats. Royal Air Maroc could definitely do better.

Extremely Disappointing Experience Boarding was chaotic and poorly managed—we were left standing in the heat for 30–45 minutes with no explanation or apology. As a business class passenger, I was shocked when a staff member rudely refused to let me board after I questioned why I had to check in my carry-on, which contained valuables. Despite explaining my concerns, he remained unreasonably inflexible. Thankfully, the captain intervened and retrieved my bag personally. This same staff member was also loud and disrespectful to several other passengers. Completely unacceptable service.

Awful. Seats on this Dreamliner really uncomfortable with broken tables. No food selection availability in business class. Poor service. No engagement senior flight attendant spent more time applying make up then speaking to her guests. It appeared that the right side received a different level of service to the left when there were only 8 people. Worst flight I have ever had. A great way to ruin an outstanding two week with this return flight

Flights were okay. Not bad, not good. On time and efficient. Planes are a bit old and run down, even the 787... Casablanca airport, HORRIBLE. no air conditioning, no power outlets, no clear signs to anywhere, old, unfriendly, no restaurants to speak of. Casablanca lounge, HORRIFIC No seats available most of the time, no power outlets working, no food, only water is offered, 1 shower available, unfriendly and inneficient people, no air conditioning, flies and bugs everywhere, extremely old seats and unconfortable. Although with some cleaning crew present, toilettes are .... not too clean.

3 hour delay, very rude flight attendant the food was horrible.

Wait time was very long during boarding. We had to wait a while in the bus which was under the sun.

When the flight landed, it was still going towards the gate, when everybody got up. Nobody cared that the flight was still in "active taxi" mode. But seems like this is common on Air Maroc flights.

1. Boarding - Chaotic, no announcements. 2. Gate Agents - Don't care about anything. 3. Inflight - FA are good and cordial. 4. Landing - Everybody is in a rush to get out because of the crowding at immigration.

Everything you need to know for your flight from Washington, D.C. to Portugal

Cabin class types available on flights to Portugal

Cabin classes available on flights to Portugal. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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