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Find cheap flights from Washington Dulles Airport to Portugal from $258

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 8/5. 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
Mon 7/8
Mon 7/15

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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$888
Porto
Porto1 stop$410
Ponta Delgada
Ponta Delgada1 stop$761
Funchal
Funchal1 stop$538
Faro
Faro1 stop$522
Lajes
Lajes1 stop$997
Pico Island
Pico Island1 stop$1,277
Horta
Horta1 stop$1,265
Porto Santo
Porto Santo1 stop$901

Good to know

Low season

January

High season

September

Cheapest flight

$258
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 Porto

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 $448 one-way - $660 round-trip
  • Morning departure is around 3% cheaper 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 10310 reviews
7.4Food
7.9Comfort
8.0Entertainment
8.2Boarding
8.6Crew
Airline reviews

3 hours late and all they have is was a $12 meal voucher. That’s not even enough to cover fast food.

2.0 MediocreCraig, Jun 2024CVG - LGA
Read more about Delta reviews

3 hours late and all they have is was a $12 meal voucher. That’s not even enough to cover fast food.

Among the poorest flights I’ve had with Delta in a while. Entertainment system failed completely on a 7.5 hr flight. Crew seemed distracted and not the normal friendly crew. Flight overbooked it seemed… very crowded.

If I can, I always fly Delta. I’ve found their service to always be reliable and pleasant.

You could have not cancelled the flight (AA, which I will be flying from now on) left for BOS despite the fictitious weather issues (that no one in my Boston family could see). You could have rebooked my direct flight to another direct flight instead of sending me though JFK, the worst US airport after O’Hara You could have rebooked me on a Main Cabin seat (like the one I paid for in my original ticket instead of putting me a the last row on JFK->BOS leg, pocketing the difference in ticket price But I do not really care whether you will ever do that in a future because in a future neither I nor anyone from my company (unless they pay out of pocket) nor an of my clients and partners (if they heed my advice) will ever be caught dead on any of Delta flights

Really bad baggage handling. Had my Rimowa bag badly damaged at the latches.

It was pretty good I was worried with the short Layover that I might not catch my connection but the gate was there

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Friendly flight attendants. Comfort plus seats were very comfortable and had lots of leg room. 10A and 10 B.

I've flown many many times on Northwest and then Delta. The crew on this flight were absolutely the best I've had the pleasure of being looked after by.

I flew Delta last week and United Airlines is a poor substitute mechanical problems with the plane and shitty food among other things made my travel experience what’s become to be expected from United no way is it ever worth the money they make us pay

We ended up with seats in the very back. So they did not recline. Have no idea why, we reserved and checked in very early. The isles were very narrow and the seats had very little leg room. But they did give us water, and a snack.

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.

We left our child’s tablet on our seat 12 B on the plane and we can’t get a hold of anyone to try to get help locating the tablet.

My flight was cancelled after a 7 hour delay. I am awaiting a refund.

Ability to select seating would be nice. We were family of three and they had us seated back to back and one of us on the other side of the plane??? That is pretty goofy. Especially when tickets were placed two months in advance.

We had a seat that would not function. No Wifi or inflight entertainment was available. Food was very poor. Attendants were very accommodating and apologized for the problems.

I am quite satisfied. The flight was on time and landed early. Staff was friendly.

I could change to business before flight and everything was perfect except for entertainment which was none.

Needed more info on connecting flight. Late flight made very short connection. Lost luggage that we still do not have!

Seats comfortable on economy plus and attendants very helpful. Food was ok. Bathrooms needed servicing.

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.

The check in process was terrible. Took a long time to check in because there is not enough agents. Once we got to gate, no announcement to board, all of a sudden people got up and board. The seats were EXTREMELY UNCOMFORTABLE. It was a 3 hours international flight, and we were served one tiny cup of water. 😩😩 The temperature was so hot inside rhe plane we thought we were sitting in an oven. Very difficult to find a flight attendant for assistance. They ran up and down aisle to serve first class but never really look up to seve the rest of the flight. I would never fly on this airline again. The experience was horrible.

What didnt i like? You had to pay for seats after the booking was paid for. If i knew that beforehand i would have booked with emirates for a few dollars more

Most important was the effciency - on-time take-offs and landings, no missed connections, baggage arrived correctly. Friendly & professional crew. Less important was food/drink. Pretty spartan, but we'll know next time and bring our own stuff.

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.

Dinner was excellent - beef stew, the eggs for breakfast were only ok. It was soooo nice that there were so many options for movies and games.

Captain waited 45 minutes for late passengers boarding from Washington DC to Munich which was nice for them but caused our luggage to miss boarding our connection on to Bucharest. We then did not receive our luggage for about 48 hours after landing which was very inconvenient for our travel.

Poor, we had 1 hour to grab our checked luggage, go through customs, recheck bags and run across terminals to make our United flight. Poorly planned connections.

Check in in Albuquerque was awful. The people were great but they were over loaded. The procedures were terrible. We got through fine but it took 90+ minutes.

Will try to not fly with them again. Delays because of weather but got redirected to an airport where I could not make connection.

Staff didn’t care in business class. Closed the door on my mom while she was on the jetbridge and flight attendant told me she would make it from the connecting flight. They lied. My luggage was damaged on arrival. No success in filing damage claim.

Boston Logan is a crummy airport - signage is terrible or lacking in areas. Boarding seemed to be a free for all and with all the different airlines speaking, you couldn't tell who was supposed to be where and when. Plain and simple, airlines should board from the back of the plane to the front. Also someone was sitting in my seat. By the time that was figured out, I had to place my overhead behind me which made de-planing more difficult. Logan is not Lufthansa's fault so that is not on them, Boarding is on them! Still, overall it was a Good Experience flying with Lufthansa. This is not my first flight with them...

Overall, the flight was comfortable without any serious issues. Transit through Frankfurt airport was a little confusing, but not too difficult if you follow the signs

There was a screaming child behind our seats. This prevented us from getting any sleep during the night.

There was a screaming child just behind our seats. This prevented us from getting any sleep during the night!!

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

Recent round-trip flight deals

9/30Mon
1 stopTAP AIR PORTUGAL
21h 55mIAD-OPO
10/21Mon
1 stopTAP AIR PORTUGAL
22h 30mOPO-IAD
$410
9/30Mon
1 stopTAP AIR PORTUGAL
13h 40mIAD-OPO
10/16Wed
1 stopTAP AIR PORTUGAL
26h 25mOPO-IAD
$418
11/24Sun
1 stopDelta
16h 50mIAD-OPO
11/27Wed
1 stopDelta
33h 30mOPO-IAD
$438
11/25Mon
2 stopsDelta
17h 00mIAD-OPO
12/3Tue
1 stopDelta
15h 45mOPO-IAD
$443
11/22Fri
2 stopsUnited Airlines
16h 35mIAD-OPO
11/28Thu
1 stopUnited Airlines
14h 50mOPO-IAD
$601
11/21Thu
1 stopUnited Airlines
13h 15mIAD-OPO
11/29Fri
2 stopsUnited Airlines
19h 17mOPO-IAD
$612
9/30Mon
2 stopsIberia
21h 00mIAD-OPO
10/16Wed
2 stopsIberia
24h 00mOPO-IAD
$622
10/8Tue
1 stopIberia
10h 00mIAD-OPO
10/16Wed
2 stopsIberia
24h 00mOPO-IAD
$673
11/11Mon
1 stopLufthansa
14h 45mIAD-FNC
11/19Tue
2 stopsLufthansa
34h 35mFNC-IAD
$770
7/30Tue
2 stopsLufthansa
16h 40mIAD-FAO
8/26Mon
1 stopLufthansa
32h 30mFAO-IAD
$785

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Recent one-way flight deals

8/5Mon
1 stopTAP AIR PORTUGAL
10h 25mIAD-OPO
$258
8/4Sun
1 stopTAP AIR PORTUGAL
10h 50mIAD-OPO
$260
8/5Mon
2 stops
27h 00mIAD-OPO
$267
11/13Wed
2 stopsDelta
16h 35mIAD-OPO
$473
6/30Sun
2 stopsLufthansa
19h 30mIAD-OPO
$634
6/16Sun
1 stopLufthansa
20h 00mIAD-OPO
$762
9/2Mon
2 stopsIberia
19h 40mIAD-LIS
$774
7/1Mon
1 stopBritish Airways
24h 20mIAD-LIS
$1,026
7/5Fri
2 stopsDelta
13h 35mIAD-LIS
$1,102
6/16Sun
2 stopsBritish Airways
17h 27mIAD-OPO
$2,413

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Last minute flights from Dulles Intl to Portugal

Last minute flight, train and bus deals

6/9Sun
multi-stopKLM
13h 10mIAD-OPO
6/26Wed
multi-stopKLM
14h 55mOPO-IAD
$822
6/10Mon
multi-stopKLM
16h 05mIAD-OPO
6/16Sun
multi-stopKLM
14h 55mOPO-IAD
$824
6/10Mon
multi-stopDelta
17h 27mIAD-OPO
6/16Sun
multi-stopDelta
14h 55mOPO-IAD
$828
6/9Sun
multi-stopDelta
13h 10mIAD-OPO
6/26Wed
multi-stopDelta
19h 44mOPO-IAD
$834
6/11Tue
multi-stopBritish Airways
19h 00mIAD-LIS
6/18Tue
multi-stopBritish Airways
18h 15mLIS-IAD
$936
6/9Sun
multi-stopRoyal Air Maroc
15h 20mIAD-LIS
6/15Sat
multi-stopRoyal Air Maroc
27h 20mLIS-IAD
$965
6/9Sun
multi-stopRoyal Air Maroc
15h 20mIAD-LIS
6/15Sat
multi-stopRoyal Air Maroc
27h 20mLIS-IAD
$1,009
6/10Mon
multi-stopBritish Airways
30h 25mIAD-LIS
6/16Sun
multi-stopBritish Airways
18h 15mLIS-IAD
$1,014
6/9Sun
nonstopTAP AIR PORTUGAL
7h 30mIAD-LIS
6/25Tue
nonstopTAP AIR PORTUGAL
8h 20mLIS-IAD
$1,090
6/11Tue
nonstopTAP AIR PORTUGAL
7h 30mIAD-LIS
6/25Tue
nonstopTAP AIR PORTUGAL
8h 20mLIS-IAD
$1,139

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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
$1,384
$1,555
$463