Find Cheap Flights from Washington Dulles Intl to Porto (IAD - OPO)

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Washington Dulles Intl to Porto Flight Information

Flights Arrive in Porto
Flights Depart from Washington Dulles Intl
Flight Price $577
Distance 3,540 miles
Airlines KLM, British Airways, Lufthansa, Turkish Airlines, TAP AIR PORTUGAL, SWISS, Royal Air Maroc, Alitalia, Brussels Airlines

Top Tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $762 or less.

FAQs for Booking Washington Dulles Intl to Porto Flights

How long does a flight from Washington Dulles Intl to Porto take?
There are no direct flights for this route listed on KAYAK, the shortest multi-flight duration is 11h 50m.
Which airlines provide the cheapest flights from Washington Dulles Intl to Porto?
In the past 3 days, the cheapest round-trip tickets were found on Multiple Airlines ($577), KLM ($645) and British Airways ($726).
Do I need a passport to fly between Washington Dulles Intl and Porto?
Yes.

Book cheap flights from Washington Dulles Intl to Porto (round-trip)

Airports
Origin
Washington
$577
only
$577
Destination
Porto
$577
only
$577
Sun, Mar 3
IAD
Washington Dulles Intl
OPO
Porto
29h 10m
Thu, Mar 21
OPO
Porto
IAD
Washington Dulles Intl
17h 50m
Trip: 18 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Apr 10
IAD
Washington Dulles Intl
OPO
Porto
23h 35m
Fri, Apr 26
OPO
Porto
IAD
Washington Dulles Intl
15h 40m
Trip: 17 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 2,446 reviews
Overall
8.0
Boarding
8.0
Comfort
7.7
Crew
8.5
Entertainment
7.1
Food
7.5
FCO
AMS
Excellent 10.0

Pros: Crew was awesome

Cons: .

LAX
AMS
Good 6.6

Pros: The staff tried to help me when it was evident we would not arrive on time

Cons: The connecting flight is too short of a time. We were late out of LAX and I missed my connection and had to sit in airport for 5 hours. Missed my grandson’s third birthday party. Just made me sad as Travelled from far to try to make it.

AMS
MUC
Okay 5.3

Cons: Services was pretty weird .. Perse or crew Leader was ok But the assistent Young one was Really bad.. aptitud and not friendly at all.

IAD
AMS
Excellent 10.0

Pros: The flight was perfect! Great food,movies and I even got to sleep !

Cons: All was well!

ATL
AMS
Excellent 8.0

Pros: Face recognition was amazing

Cons: Too hot on plane

Wed, Nov 21
IAD
Washington Dulles Intl
OPO
Porto
16h 20m
Tue, Nov 27
OPO
Porto
IAD
Washington Dulles Intl
35h 25m
Trip: 7 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 19,535 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
6.9
Food
6.8
BCN
LHR
Okay 5.6

Cons: Taking off is too slow. We were late with our connecting flights.

TLV
LHR
Okay 4.3

Pros: we buy the tickets from kayak and reconfirmed with British Airways is that we allowed to have one suitcase of 23 kilo checked in for each person . would get to their products and we paid 180 US dollars for the read suitcases we have . I didn’t mention kayak to give me the 180 us dollar back

Cons: we buy the tickets from kayak and reconfirmed with British Airways is that we allowed to have one suitcase of 23 kilo checked in for each person . would get to their products and we paid 180 US dollars for the read suitcases we have . I didn’t mention kayak to give me the 180 us dollar back

VCE
LGW
Mediocre 3.6

Cons: Seat spacing too close, no leg room. Charge for all snacks. Need to enforce carry on limits.

MIA
LHR
Good 6.3

Pros: Crew was polite and helped a lot.

Cons: Confusing information about the terminal in Miami. Terminal C does not exist.

LGW
MCO
Excellent 10.0

Pros: Comfortable

Thu, Dec 13
IAD
Washington Dulles Intl
OPO
Porto
12h 55m
Sun, Dec 23
OPO
Porto
IAD
Washington Dulles Intl
24h 35m
Trip: 11 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 23,682 reviews
Overall
8.1
Boarding
8.1
Comfort
7.9
Crew
8.5
Entertainment
7.7
Food
7.7
LHR
MUC
Excellent 8.4

Pros: Everything was on time and efficient.

DFW
FRA
Excellent 9.3

Pros: Service on the DFW-->FRA leg was phenomenal (ratio of attendants to fliers). Food was delicious and seats very comfortable.

Cons: Boarding process and organization could have been a bit better in communicating access and groups. Not super critical, but the goal in in process is to be as efficient as possible.

FRA
EWR
Excellent 8.6

Pros: I liked the part of entertainment, bunch of free movies we could watch

Cons: the Meals. It could have been perfect when there was other options than vegetarian.

SJC
FRA
Good 6.3

Cons: Not sure about booking with flyus. Com- next time I will prefer not to use Kayak if flight is booked through flyus.com

ZAG
MUC
Mediocre 2.0

Cons: I wasn’t able to fly because my passport was stolen

Sun, Apr 14
IAD
Washington Dulles Intl
OPO
Porto
31h 20m
Fri, Apr 26
OPO
Porto
IAD
Washington Dulles Intl
36h 10m
Trip: 13 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 20,936 reviews
Overall
8.0
Boarding
7.9
Comfort
7.8
Crew
8.3
Entertainment
8.1
Food
8.0
LWO
IST
Excellent 10.0

Cons: Personal and service were grea!

IST
ORD
Excellent 10.0

Cons: Personal and service were grea!

PRG
IST
Excellent 9.6

Pros: Everything

Cons: Everything

IST
AMS
Good 6.0

Pros: Courteous and helpful crew

Cons: My seat was broken. Entertainment system was non responsige and expressly slow. Couldn’t hear anything from the earphones.

IST
ORD
Excellent 8.3

Pros: Entertainment options were excellent. A lot to choose from. Provided small travel bag for the flight. Airplane was clean They offered for the first drink a homemade lemon with fresh mint which was wonderful. Will definitely fly them again. Great price

Cons: Low sodium meal was not tasty. Could not finish it due to lack texture.

Sat, Dec 8
IAD
Washington Dulles Intl
OPO
Porto
20h 05m
Tue, Dec 11
OPO
Porto
IAD
Washington Dulles Intl
14h 14m
Trip: 4 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 4,114 reviews
Overall
7.4
Boarding
7.3
Comfort
7.2
Crew
7.9
Entertainment
6.6
Food
7.0
MIA
LIS
Good 6.3

Pros: Service was good and the food was better than average.

Cons: Paying extra for business class so you can sleep just isn't worth it with TAP. We had an older plane, showing its age, and the seats did not go completely flat. So, I kept slipping down and my feet jammed into the seat in front of me.

BCN
LIS
Okay 4.8

Pros: Planes clean and in good condition.

Cons: Crowded and late departure.

JFK
LIS
Excellent 10.0

Pros: The business class seating was very comfortable and the flight attendants were super friendly and helpful. A good list of movies.

Cons: Shame that the lounge at the JFK airport was closed.

LIS
BOS
Excellent 8.6

Pros: Everything else

Cons: The WiFi was expensive and very little total data allowance even in Executive class so very unsatisfactory.

BOS
LIS
Okay 4.6

Cons: Very warm in cabin, no means of controlling air flow. Seat space very cramped. Very tall person next to me in my space

Tue, Jan 8
IAD
Washington Dulles Intl
OPO
Porto
14h 45m
Wed, Jan 23
OPO
Porto
IAD
Washington Dulles Intl
25h 05m
$1028
Trip: 16 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 7,403 reviews
Overall
8.3
Boarding
8.3
Comfort
7.9
Crew
8.7
Entertainment
7.8
Food
8.0
ZRH
SFO
Mediocre 3.6

Cons: I wanted to get some work done on my flight but I couldn't even open my laptop screen more than a few inches.

ZRH
MIA
Okay 5.6

Pros: The crew was great and the food was pretty good. The crew did a great job of keeping the lavatories clean and stocked. It was a 10.5 hr flight and they gave us one meal, a snack and a treat. Not a lot but since we were just sitting it was enough food. We had to stop for a meal on the way home from the airport.

Cons: The seats in the economy cabin are cramped together. If the person in front of your leans back you are almost trapped in your seat. There is little leg room and the cushioning is not enough for a long distance flight. There is no boarding control. People just line up and get on the plane in any order.

FCO
ZRH
Okay 5.2

Cons: The seats in the economy cabin are cramped together. If the person in front of your leans back you are almost trapped in your seat. There is little leg room and the cushioning is not enough for a long distance flight. There is no boarding control. People just line up and get on the plane in any order.

TXL
ZRH
Excellent 8.6

Pros: Friendly staff On time

Cons: Seats (legs)

ZRH
SFO
Good 7.6

Pros: Food and drink service were excellent and big choice of entertainment

Cons: seat row spacing in economy was too tight for a 10+ hour flight

Fri, Mar 8
IAD
Washington Dulles Intl
OPO
Porto
11h 50m
Sun, Mar 10
OPO
Porto
IAD
Washington Dulles Intl
11h 40m
$1090
Trip: 2 days
6.5GoodShow reviews
Overall 6.5 Good
Based on 2,083 reviews
Overall
6.6
Boarding
6.5
Comfort
6.6
Crew
6.9
Entertainment
6.1
Food
6.3
AGA
CMN
Mediocre 2.0

Pros: We were late at Casablanca airport again late when we landed at jfk so I was late for 2 hours so I missed my transit from jfk to Philadelphia I struggled the whole to get home

Cons: Timing

LIS
CMN
Excellent 8.3

Pros: We had a tight connection and they bussed us to the next plane. Awesome.

CMN
JFK
Mediocre 2.0

Cons: We were late at Casablanca airport again late when we landed at jfk so I was late for 2 hours so I missed my transit from jfk to Philadelphia I struggled the whole to get home

CMN
IAD
Excellent 9.6

Pros: Very accommodating airline. Would use them again

CMN
YUL
Excellent 8.0

Pros: Large space between seats

Tue, Mar 5
IAD
Washington Dulles Intl
OPO
Porto
17h 40m
Thu, Mar 21
OPO
Porto
IAD
Washington Dulles Intl
17h 50m
Trip: 16 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Mar 6
IAD
Washington Dulles Intl
OPO
Porto
21h 55m
Wed, Mar 20
OPO
Porto
IAD
Washington Dulles Intl
26h 30m
Trip: 14 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Apr 27
IAD
Washington Dulles Intl
OPO
Porto
12h 05m
Sun, May 5
OPO
Porto
IAD
Washington Dulles Intl
24h 10m
Trip: 9 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 2,446 reviews
Overall
8.0
Boarding
8.0
Comfort
7.7
Crew
8.5
Entertainment
7.1
Food
7.5
OPO
AMS
Excellent 10.0

Pros: Flying with KLM is a pleasure

AMS
MUC
Okay 5.3

Cons: Services was pretty weird .. Perse or crew Leader was ok But the assistent Young one was Really bad.. aptitud and not friendly at all.

IAD
AMS
Excellent 10.0

Pros: The flight was perfect! Great food,movies and I even got to sleep !

Cons: All was well!

LAX
AMS
Good 6.6

Pros: The staff tried to help me when it was evident we would not arrive on time

Cons: The connecting flight is too short of a time. We were late out of LAX and I missed my connection and had to sit in airport for 5 hours. Missed my grandson’s third birthday party. Just made me sad as Travelled from far to try to make it.

ARN
AMS
Excellent 8.3

Pros: Time and Good clean place.. in This case airpöane..

Cons: It was not entreteiment st all

Tue, Mar 5
IAD
Washington Dulles Intl
OPO
Porto
17h 40m
Tue, Mar 19
OPO
Porto
IAD
Washington Dulles Intl
19h 10m
Trip: 14 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Apr 10
IAD
Washington Dulles Intl
OPO
Porto
21h 30m
Sun, Apr 28
OPO
Porto
IAD
Washington Dulles Intl
24h 10m
Trip: 19 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 2,446 reviews
Overall
8.0
Boarding
8.0
Comfort
7.7
Crew
8.5
Entertainment
7.1
Food
7.5
FCO
AMS
Excellent 10.0

Pros: Crew was awesome

Cons: .

IAD
AMS
Excellent 10.0

Pros: The flight was perfect! Great food,movies and I even got to sleep !

Cons: All was well!

AMS
MUC
Okay 5.3

Cons: Services was pretty weird .. Perse or crew Leader was ok But the assistent Young one was Really bad.. aptitud and not friendly at all.

LAX
AMS
Good 6.6

Pros: The staff tried to help me when it was evident we would not arrive on time

Cons: The connecting flight is too short of a time. We were late out of LAX and I missed my connection and had to sit in airport for 5 hours. Missed my grandson’s third birthday party. Just made me sad as Travelled from far to try to make it.

NRT
AMS
Okay 4.3

Pros: punctuality of boarding and flight time

Cons: attitude of crew in business class: no sense of true hospitality

Wed, Mar 6
IAD
Washington Dulles Intl
OPO
Porto
21h 55m
Thu, Mar 21
OPO
Porto
IAD
Washington Dulles Intl
17h 50m
Trip: 15 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Apr 13
IAD
Washington Dulles Intl
OPO
Porto
34h 35m
Thu, Apr 25
OPO
Porto
IAD
Washington Dulles Intl
32h 55m
Trip: 13 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 20,936 reviews
Overall
8.0
Boarding
7.9
Comfort
7.8
Crew
8.3
Entertainment
8.1
Food
8.0
PRG
IST
Excellent 9.6

Pros: Everything

Cons: Everything

LWO
IST
Excellent 10.0

Cons: Personal and service were grea!

AYT
IST
Good 6.0

Cons: Delayed flight 1 hour

IST
ORD
Excellent 10.0

Cons: Personal and service were grea!

IST
ORD
Excellent 8.3

Pros: Entertainment options were excellent. A lot to choose from. Provided small travel bag for the flight. Airplane was clean They offered for the first drink a homemade lemon with fresh mint which was wonderful. Will definitely fly them again. Great price

Cons: Low sodium meal was not tasty. Could not finish it due to lack texture.

Sat, Jan 12
IAD
Washington Dulles Intl
OPO
Porto
18h 40m
Mon, Jan 21
OPO
Porto
IAD
Washington Dulles Intl
18h 00m
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Dec 18
IAD
Washington Dulles Intl
OPO
Porto
25h 35m
Mon, Jan 7
OPO
Porto
IAD
Washington Dulles Intl
33h 35m
$1797
Trip: 21 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 1,210 reviews
Overall
7.1
Boarding
7.2
Comfort
6.9
Crew
7.5
Entertainment
5.9
Food
6.3
CTA
FCO
Mediocre 2.0

Cons: We were traveling with my 94-year-old grandfather who needed wheelchair assistance. And it took the 4th person I asked to get any assistance. The very first Alitalia person I tried to speak to was the very worst. Though her job was to check people in, she said she couldn't help me and to go to another counter. When I asked if she could please at least make a call to get a wheelchair (my grandfather was at the airport entry and couldn't walk) she made a terrible face, threw the papers on her desk around and said I had to go to another counter. When I went to the counter she pointed at, I was told again I would have to go to another counter. No offense to dog owners, but the animals that were traveling received better assistance.

FCO
TUN
Excellent 8.3

Pros: good onboard service

Cons: the business class wasnt really so good to my expectation.

JFK
FCO
Good 6.0

Pros: The flight itself was pleasant.

Cons: The trip was apparently booked as a flight to Madrid with a one-night stopover in Milan and yet the ticketing staff told me that I would not be able to check my bag to Milan since it would go directly to Madrid. I found this to be very odd since I booked a multi-city flight through Kayak. I was also unable to use TSA pre-check with Alitalia, which was inconvenient.

FCO
JNB
Okay 5.3

Pros: Cheap fares and direct flight

Cons: Entertainment very poor. Would recommend a kruger selection of movies and preferably to be available to watch once we are on the plane waiting for take off. Economy class space limited .

CAG
FCO
Excellent 10.0

Pros: All good..

Wed, Apr 10
IAD
Washington Dulles Intl
OPO
Porto
23h 35m
Mon, Apr 22
OPO
Porto
IAD
Washington Dulles Intl
22h 55m
Trip: 13 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 2,446 reviews
Overall
8.0
Boarding
8.0
Comfort
7.7
Crew
8.5
Entertainment
7.1
Food
7.5
OPO
AMS
Excellent 10.0

Pros: Flying with KLM is a pleasure

ARN
AMS
Excellent 8.3

Pros: Time and Good clean place.. in This case airpöane..

Cons: It was not entreteiment st all

YYZ
AMS
Excellent 10.0

Pros: Staff very pleasant

Cons: Evening snack was not the greatest breakfast was pretty food

AMS
IAH
Excellent 8.0

Pros: Very friendly and helpful crew.

IAD
AMS
Excellent 10.0

Pros: The flight was perfect! Great food,movies and I even got to sleep !

Cons: All was well!

Sun, Nov 18
IAD
Washington Dulles Intl
OPO
Porto
34h 50m
Tue, Dec 4
OPO
Porto
IAD
Washington Dulles Intl
32h 40m
Trip: 17 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 20,936 reviews
Overall
8.0
Boarding
7.9
Comfort
7.8
Crew
8.3
Entertainment
8.1
Food
8.0
IST
ATL
Excellent 10.0

Pros: Customer service was excellent and food was restaurant grade!

Cons: Nothing comes to my minds

IST
ORD
Excellent 8.3

Pros: Entertainment options were excellent. A lot to choose from. Provided small travel bag for the flight. Airplane was clean They offered for the first drink a homemade lemon with fresh mint which was wonderful. Will definitely fly them again. Great price

Cons: Low sodium meal was not tasty. Could not finish it due to lack texture.

IST
SFO
Good 6.0

Pros: Friendly flight attendants

Cons: Long layover hours at Istanbul airport . Had to ask for meal voucher at Istanbul airport since the airline does not issue it .

IST
AMS
Good 6.0

Pros: Courteous and helpful crew

Cons: My seat was broken. Entertainment system was non responsige and expressly slow. Couldn’t hear anything from the earphones.

LAX
IST
Excellent 9.3

Pros: Food is DELICIOUS! Service is impeccable. Very friendly and attentive flight attendants.

Cons: The seat leg room is on the smaller side, although the incline is good.

Fri, Nov 23
IAD
Washington Dulles Intl
OPO
Porto
36h 05m
Mon, Dec 3
OPO
Porto
IAD
Washington Dulles Intl
31h 20m
$1922
Trip: 11 days
6.9GoodShow reviews
Overall 6.9 Good
Based on 1,943 reviews
Overall
7.1
Boarding
7.1
Comfort
7.0
Crew
7.6
Entertainment
6.4
Food
6.4
BRU
YYZ
Excellent 9.3

Pros: Great service, food and entertainment.

CDG
BRU
Excellent 9.6

Pros: Comfort of the plane, service

Cons: No business lounge in CDG before 9am

BRU
IAD
Mediocre 2.0

Pros: Nothing

Cons: I am handicap, I travel with a scooter. We let them know months in advance and still they did not plan or assist. My scooter was not brought up in Brussels or DC, I refused to leave the plane in DC until they finally brought it to plane. They sat me in row 38...I can only walk a few feet so the airline failed in every aspect...epuc fail. I will never fly Brussels airlines again.

BUD
BRU
Mediocre 3.6

Cons: It was delayed. I paid very expensive to fly on Business to be on the first row. Because every minute count for me on this trip. But it was delayed. I feel I should get a refund for sum of the money I spent

BRU
PRG
Mediocre 2.0

Cons: Delayed. Crew seemed pretty annoyed to have people aboard. Will avoid next time.

*
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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.