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Find cheap flights from Washington Dulles Airport to Portugal from $298

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Portugal departing on 8/15. 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.
1 adult
0 bags
vie. 6/7
vie. 6/14

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Best Portugal Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Lisbon
Lisbon1 stop$763
Porto
Porto1 stop$403
Ponta Delgada
Ponta Delgada1 stop$530
Funchal
Funchal1 stop$772
Faro
Faro1 stop$602
Lajes
Lajes1 stop$817
Pico Island
Pico Island1 stop$1,362
Horta
Horta1 stop$817
Porto Santo
Porto Santo1 stop$1,366

Good to know

Low season

January

High season

September

Cheapest flight

$298
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 6% increase in price.
Flight from Washington Dulles Airport to Lisbon

FAQs - booking Portugal flights

  • How does KAYAK find such low prices on flights from Washington Dulles Airport 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 Dulles Airport to Portugal.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portugal from Washington Dulles Airport 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 Dulles Airport 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 to Portugal with an airline and back to Washington Dulles Airport with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport 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 to Portugal from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Portugal

  • Looking for a cheap flight? 25% of our users found tickets from Washington Dulles Airport to the following destinations at these prices or less: Lisbon $490 one-way - $751 round-trip
  • Morning departure is around 17% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from Dulles Intl to Portugal

 
Need help choosing which airline to fly with from Dulles Intl 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.
8.0
DeltaOverall score based on 10789 reviews
8.2Boarding
7.4Food
8.0Entertainment
7.9Comfort
8.6Crew
Airline reviews

West Jet has a horrible boarding process and the seats have no cushion.

4.0 OkayDouglas, May 2024MSP - YEG
Read more about Delta reviews

West Jet has a horrible boarding process and the seats have no cushion.

Everything went smoothly. I didn’t like that when I booked in the main cabin my wife and I weren’t seated together. One would think when booking on an option that allows picking your seat. They would put you and your travel partner together. Had to call to get it sorted. They did fix.

The gate area was incredibly short staffed, with one representative manning 4-5 flights, which caused a 3 hr delay in boarding even though the plane was all ready to leave. Other flights also were delayed because of this. The flight crew was awesome and I feel bad for the only gate worker on call, but Delta needs to hire more employees.

Very frustrated with boarding gate crew. She announced the plane was small and they would be limiting us to one item to carry on. Not a problem for me as I understand the tiny planes have limited space!! Not the case here! It was a rather large plane and had plenty of room for bags! So because I don’t want to be one of “those people” who ignores the request to check a carry on I did so asking if I would be able to pick it up at the bottom of the ramp on arrival in Knoxville to which she responded “yes”! Then I watched as every other passenger held onto their 2 items and boarded!! Then when we arrived in Knoxville our 2 carry ons had been put with all the other luggage and we had to go to baggage pick up and wait for all the big checked bags to come off the carousel! So she lied!! Frustrating. Next time I won’t be so nice!

It was a good experience except when boarding a female flight attendant did not go out of her way to assist my teenage daughters in finding space for their carry-ons after their compartments were full.

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

Checking in at the airport the agent only booked the first keg of my trip and had my checked luggage going to the airport with a layover! Never was issued a boarding pass for the second leg or received sticker fir my checked bag. All was well in the end! Delta agents helped to resolve the situation!!!

Delayed due to an ill passenger after loading. Not preventable on Delta's part. Was in first class. The seats are becoming worn and detaching from their velcro attachments. Only got snacks on flight. The attendant was not the friendliest.

I would fly again the whole experience was great. The only feed back I can give that they don't do that American Airlines does is the crew there is more humorous with boarding and thank their passengers. It makes it more fun to fly with them. I would however fly Delta again.

Big plane, long flight, absolutely no leg room and basically non existent air! I am 5”4’ and always travel Main Cabin, I was miserable on this plane and could barely move when we arrived in Cabo due to the cramped leg area!

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

Food was terrible Not many options Stewards dont care Delay

The ride was good but no food ot entertainment hence, it was just over an hour flight.

they made me check my carryon. There was space in the overhead bins.

The plane was delayed 2 hours. The wifi did not work. The seat in first class was not comfortable because the bottom felt like it lost all of its padding. And I did not like when the flight attendant made me wait at my seat to use the bathroom and didn't tell me why. If there were too many people using the 1st Class bathroom, she should have told me to go in the back, coach bathrooms. I guess I have to feel fortunate that they found 2 local pilots to still fly the plane tonight after the original pilots ended up at an airport 60 miles away due to high winds.

The crew were really great, but the 4 hour delay in small chunks was the worst.

Every experience was good except for the lack of comfort in those economy seats. I never had knee pain until that flight. Those seats are uncomfortable.

I bought internet for the flight. Don’t waste your money. I wasn’t able to download a 1 Mb file from Google Docs during a 3-4 hr period. You can only use WhatsApp and email if you are willing to wait.

Just a crappy airline. The same every time. You feel you are a cow on a farm. You are being being whipped and pulled.

Wasn’t very crowded. Seamless processes. No issues traveling with two little kids.

Original flight was cancelled - After waiting 2 hours for new take-off times. Then had to stand in line for 3 hours, ending at 2:30 am - to be told, " No hotel rooms anywhere in Dallas". No way for me to get any rest at DFW at that time of night.

I liked the friendly crew and desk staff, all very helpful. I was surprised and a little annoyed on my outbound flight from LGW to MCO as I had prepaid and booked my seat, which was all correct at check in on my boarding pass. when I got on the plane someone was in my seat ! I was moved to another seat. The food choice is quite limited and I feel that an option of a muffin for breakfast snack would be welcomed, not everyone wants egg or bacon wrap. The choice of entertainment is good, plenty to keep you busy on a long haul flight. I liked the option offered to have the cabin bag checked into the hold, it saved me as an older, lone traveller lifting my case into the overhead locker or finding there was no space.

Boarding process was chaotic and disorganized. The plane needs updating in the interior. Things are broken, worn out, and dated

good service from crew. Before the would have an option between cookies or nuts as snacks.. Now, there are only cookies. too bad. People who can not have sugar don't have a choice.

Fast check in, easy to navigate, crew were very good, the plane was delayed due to a previous flight and I found the cleanliness a little lacking but overall it was fine

I would not fly with BA again. Packed in like sardines, constant request to turn down air conditioning due to freezing cold for hours and the food was pretty to look at but tasteless!

My wife and I paid for seat selection to be together. My wife and I were on separate rows and the excuse they gave was they changed the plane. Also, I have celiac and asked for a gluten free meal in the ticket profile which they did not have.

I’m hoping for WiFi included. Everything else was very good

An average flight experience. For our transatlantic portion, they provided a main meal and two snacks. However, the food was not very tasty and the drinks far too small and infrequent for such a long flight. The regrettable part of the flight was that the toilets were extremely filthy. I feel this is unacceptable.

This flight was a code share for both Iberia and American Airlines and run by what I assume is a charter company Level. It was difficult if not impossible to get a seat assigned, check bags or use any customer service functions. I would skip it!

Great airline, new, comfortable and quiet planes. Plenty of leg room and state of the art entertainment system. The big downside is the connection in Lisbon. The airport is small and a bus is needed from the plane to the terminal. Is a mess, takes a lot of time, nobody gives an explanation, boarding zones are not honored, etc.

I thought Miami's airport was very disorganized during the Boarding.

Very efficient boarding - other airlines could learn from them. Friendly, efficient crew. Red eye flight, so dinner meal was irrelevant. Breakfast could have been more substantial. Seats reasonably comfy.

People seated in exit rows should have designated overhead space

I have been flying internationally for most of like. My first trip with TAP- wonderful! I look forward to flying with them more frequently in the future!

Larger seats on this plane made the ride reasonably comfortable. Our next flight, from Lisbon to Copenhagen, was inconsiderately tight and stressful. The seats were smaller, space between rows was very limited (no button or mechanism to even slightly incline anyone’s seat), and leg-cramping under the seat in front. Just like sardines in a can. Really felt for all the tall Danes on the flight. Their knees were pressed against the seat in front throughout the flight.

Flight was 2+ hrs late boarding. Delay updates were nonexistent. Boarding Gate change was by word of mouth.

The plane was modern and clean. TAP staff at the airport as well as the flight crew were professional, friendly, and helpful. Overall, a great experience.

The airline made last minute changes to our business class seats splitting our family of 4 with young children who had pre-booked a row of 4 seats. The seat was also dirty and sticky. Our pre-ordered child meals were also not available. :(

Awful experience all around, misleading booking led to disgraceful baggage charge at gate. Tiny uncomfortable seats with little drinks served in small paper cups filled halfway. Difficult to use bathrooms the whole flight and now on the way back we’re stuck in Lisbon a day later because of a diversion on our connecting flight, I will never fly this airline again.

Bordón could be bettet if the company say before boarding the order of the different groups.

Checked in is easy and it was a smooth flight from LAX to Munich

There is no recline on flight from DFW to FRA. Middle eastern airways provide better recline option for the same class. FRA to Bangalore has better recline option. I bid 100$ for premium economy, my request was declined. But staff handled it without issues.

The Lufthansa part was wonderful. The short connection flight was not.

German crew were very kind. Food was okay but can be better, especially bread was not good, Garbage collection was very poor.

Awful Terrible staff poor communication Flight delayed for an hour with no apology or explanation and no help re missing connecting flight. Resulted in a 7 hour layover at Munich waiting for another connecting flight. Only 15 euros refreshment voucher given. Will not fly Lufthansa again

Both flights were late for what appeared to be the airline’s not having the planes ready. Arrived over 6 hours late.

It was a busy flight and all the crew were very helpful and gracious

Seats were not the most comfortable and food options weren’t great but overall but everything else was excellent

Check-in very easy and smooth. Plane and crew were nice. Seat open next to me created more space. Food was fair but plentiful. Lots of movies and I was able to sleep some on the way to Munich. Very tight connection, about an hour. Fast through passport control and a bit of a walk to last G terminal gate but I made my connection to Palma. Unfortunately, my luggage did not make it. It is now almost 24 hours since I anded and still NO luggage. I know it landed last night on another flight. Local delivery should be today to my hotel in Palma but nothing yet. I asked about the tight connection when I checked in and was assured they would get my luggage to the connecting flight. Very disappointing it missed my flight but more disappointing that it has taken so long to arrive. Failure on the airlines and service to get my luggage to date.

Book cheap flights from Washington, D.C. to Portugal

Recent round-trip flight deals

9/29dom.
1 stopTAP AIR PORTUGAL
13h 45mIAD-OPO
10/16mié.
1 stopTAP AIR PORTUGAL
26h 20mOPO-IAD
$403
9/29dom.
1 stopTAP AIR PORTUGAL
15h 40mIAD-OPO
10/16mié.
1 stopTAP AIR PORTUGAL
15h 20mOPO-IAD
$419
8/20mar.
1 stopDelta
16h 05mIAD-OPO
8/29jue.
1 stopDelta
14h 05mOPO-IAD
$555
10/7lun.
2 stopsDelta
17h 15mIAD-OPO
10/23mié.
1 stopDelta
11h 55mOPO-IAD
$558
9/27vie.
2 stopsIberia
27h 50mIAD-OPO
10/15mar.
1 stopIberia
16h 00mOPO-IAD
$566
10/22mar.
1 stopUnited Airlines
11h 18mIAD-OPO
11/9sáb.
2 stopsUnited Airlines
20h 31mOPO-IAD
$572
10/7lun.
2 stopsIberia
16h 10mIAD-OPO
10/14lun.
2 stopsIberia
24h 00mOPO-IAD
$580
11/3dom.
2 stopsUnited Airlines
23h 35mIAD-OPO
11/15vie.
1 stopUnited Airlines
14h 50mOPO-IAD
$581
9/29dom.
1 stopLufthansa
20h 00mIAD-OPO
10/16mié.
2 stopsLufthansa
18h 25mOPO-IAD
$605
11/1vie.
2 stopsLufthansa
19h 05mIAD-OPO
11/5mar.
2 stopsLufthansa
19h 05mOPO-IAD
$680

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Recent one-way flight deals

8/15jue.
1 stopPLAY
20h 30mIAD-LIS
$298
8/5lun.
1 stopPLAY
20h 10mIAD-OPO
$316
10/1mar.
2 stops
19h 25mIAD-LIS
$329
9/26jue.
2 stops
41h 05mIAD-LIS
$330
10/2mié.
nonstopTAP AIR PORTUGAL
7h 30mIAD-LIS
$379
10/1mar.
nonstopTAP AIR PORTUGAL
7h 30mIAD-LIS
$380
7/21dom.
2 stopsDelta
15h 17mIAD-OPO
$549
8/4dom.
2 stopsLufthansa
24h 20mIAD-OPO
$571
5/22mié.
1 stopUnited Airlines
12h 45mIAD-FAO
$968
5/14mar.
2 stopsLufthansa
16h 15mIAD-OPO
$6,503

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Last minute flights from Dulles Intl to Portugal

Last minute flight, train and bus deals

5/13lun.
nonstop
7h 15mIAD-LIS
5/22mié.
multi-stop
39h 35mLIS-IAD
$997
5/13lun.
nonstop
7h 15mIAD-LIS
5/23jue.
multi-stop
16h 45mLIS-IAD
$998
5/13lun.
nonstop
7h 15mIAD-LIS
5/21mar.
multi-stop
24h 45mLIS-IAD
$1,003
5/10vie.
multi-stopTAP AIR PORTUGAL
21h 20mIAD-OPO
5/19dom.
multi-stopTAP AIR PORTUGAL
26h 55mOPO-IAD
$1,016
5/13lun.
nonstopTAP AIR PORTUGAL
7h 15mIAD-LIS
5/24vie.
nonstopTAP AIR PORTUGAL
8h 20mLIS-IAD
$1,081
5/13lun.
multi-stopUnited Airlines
18h 05mIAD-LIS
6/11mar.
nonstopUnited Airlines
8h 10mLIS-IAD
$1,206
5/11sáb.
multi-stopUnited Airlines
31h 51mIAD-LIS
5/27lun.
multi-stopUnited Airlines
29h 15mLIS-IAD
$1,233
5/12dom.
multi-stopLufthansa
44h 24mIAD-OPO
5/19dom.
multi-stopLufthansa
14h 50mOPO-IAD
$1,260
5/12dom.
multi-stopLufthansa
16h 50mIAD-FAO
5/18sáb.
multi-stopLufthansa
27h 50mFAO-IAD
$1,578
5/10vie.
multi-stopIberia
19h 40mIAD-LIS
5/12dom.
multi-stopIberia
27h 20mLIS-IAD
$1,826

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Washington Dulles Airport - Portugal Flights

Departure:

Washington Dulles Airport (IAD)United States

Return flight deals:

Portugal - Washington Dulles Airport

Cabin classes:

$5,346
$2,407
$2,078
$491