OPO - IAD
$378 Find Cheap Flights from Porto to Washington Dulles Airport - Compare and Save
This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Porto to Dulles Intl departing on 1/18. 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.
Everything you should know
Cheapest round-trip
$471
Typical prices: $589-$804
American Airlines
Mon 10/29Sun 11/11
OPO - IAD • 1 stop
Cheapest one-way
$378
Typical prices: $491-$730
Multiple Airlines
Thu 1/18
OPO - IAD • 2 stops
Flight Deals
Cheap Flights from Porto to Dulles Intl (OPO-IAD)
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Porto to Dulles Intl 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 Porto to Dulles Intl
Fri, Nov 20 - Thu, Dec 3
9:45 pm - 6:30 pmOPO Porto-IAD Washington, D.C. Dulles Intl
25h 45m2 stops Dublin Reykjavik Keflavik Intl
7:40 pm - 9:20 pmIAD Washington, D.C. Dulles Intl-OPO Porto
20h 40m2 stops Reykjavik Keflavik Intl Dublin
$608Multiple Airlines
Thu, Nov 19 - Wed, Dec 2
8:30 am - 3:15 pmOPO Porto-IAD Washington, D.C. Dulles Intl
11h 45m1 stop Lisbon Humberto Delgado
10:30 pm - 1:30 pmIAD Washington, D.C. Dulles Intl-OPO Porto
10h 00m1 stop Lisbon Humberto Delgado
$628TAP AIR PORTUGAL
Fri, Nov 20 - Thu, Dec 3
8:00 pm - 3:15 pmOPO Porto-IAD Washington, D.C. Dulles Intl
24h 15m1 stop Lisbon Humberto Delgado
5:25 pm - 10:00 amIAD Washington, D.C. Dulles Intl-OPO Porto
11h 35m1 stop Lisbon Humberto Delgado
$628TAP AIR PORTUGAL
Thu, Nov 19 - Wed, Dec 2
8:30 am - 3:15 pmOPO Porto-IAD Washington, D.C. Dulles Intl
11h 45m1 stop Lisbon Humberto Delgado
10:30 pm - 1:30 pmIAD Washington, D.C. Dulles Intl-OPO Porto
10h 00m1 stop Lisbon Humberto Delgado
$632TAP AIR PORTUGAL
Sat, Nov 21 - Sat, Nov 28
5:00 am - 3:15 pmOPO Porto-IAD Washington, D.C. Dulles Intl
15h 15m1 stop Lisbon Humberto Delgado
5:25 pm - 5:00 pmIAD Washington, D.C. Dulles Intl-OPO Porto
18h 35m1 stop Lisbon Humberto Delgado
$632TAP AIR PORTUGAL
Fri, Nov 20 - Thu, Dec 3
9:45 pm - 6:30 pmOPO Porto-IAD Washington, D.C. Dulles Intl
25h 45m2 stops Dublin Reykjavik Keflavik Intl
7:40 pm - 12:30 amIAD Washington, D.C. Dulles Intl-OPO Porto
23h 50m3 stops Reykjavik Keflavik Intl Dublin Lisbon Humberto Delgado
$633Multiple Airlines
Fri, Nov 20 - Thu, Dec 3
5:45 pm - 6:50 pmOPO Porto-IAD Washington, D.C. Dulles Intl
30h 05m1 stop Kastrup Copenhagen
8:30 pm - 4:55 pmIAD Washington, D.C. Dulles Intl-OPO Porto
15h 25m1 stop Kastrup Copenhagen
$634Scandinavian Airlines
Fri, Nov 20 - Thu, Dec 3
12:00 pm - 8:30 pmOPO Porto-IAD Washington, D.C. Dulles Intl
13h 30m1 stop Lisbon Humberto Delgado
5:25 pm - 10:00 amIAD Washington, D.C. Dulles Intl-OPO Porto
11h 35m1 stop Lisbon Humberto Delgado
$634TAP AIR PORTUGAL
Thu, Nov 19 - Sun, Nov 22
7:00 am - 3:15 pmOPO Porto-IAD Washington, D.C. Dulles Intl
13h 15m1 stop Lisbon Humberto Delgado
10:30 pm - 1:30 pmIAD Washington, D.C. Dulles Intl-OPO Porto
10h 00m1 stop Lisbon Humberto Delgado
$639TAP AIR PORTUGAL
Fri, Nov 20 - Sun, Nov 22
8:00 pm - 3:15 pmOPO Porto-IAD Washington, D.C. Dulles Intl
24h 15m1 stop Lisbon Humberto Delgado
10:30 pm - 12:30 amIAD Washington, D.C. Dulles Intl-OPO Porto
21h 00m1 stop Lisbon Humberto Delgado
$639TAP AIR PORTUGAL
Recent one-way flight deals from Porto to Dulles Intl
Mon, Jan 18
6:30 am - 4:20 pmOPO Porto-IAD Washington, D.C. Dulles Intl
38h 50m2 stops Malaga Madrid Barajas
$378Multiple Airlines
Wed, Jan 20
4:35 pm - 4:20 pmOPO Porto-IAD Washington, D.C. Dulles Intl
28h 45m2 stops Valencia Madrid Barajas
$381Multiple Airlines
Sun, Jan 17
12:50 pm - 4:20 pmOPO Porto-IAD Washington, D.C. Dulles Intl
32h 30m2 stops Valencia Madrid Barajas
$381Multiple Airlines
Mon, Nov 30
5:40 pm - 2:45 pmOPO Porto-IAD Washington, D.C. Dulles Intl
50h 05m3 stops Marrakech Menara Casablanca Mohamed V Riyadh King Khaled Intl
$381Multiple Airlines
Sat, Nov 21
6:50 pm - 8:35 pmOPO Porto-IAD Washington, D.C. Dulles Intl
30h 45m2 stops Madrid Barajas Lisbon Humberto Delgado
$387Multiple Airlines
Wed, Nov 25
6:25 am - 3:15 pmOPO Porto-IAD Washington, D.C. Dulles Intl
37h 50m2 stops Madrid Barajas Lisbon Humberto Delgado
$397Multiple Airlines
Mon, Nov 30
8:40 am - 2:40 pmOPO Porto-IAD Washington, D.C. Dulles Intl
35h 00m2 stops Barcelona-El Prat Lisbon Humberto Delgado
$402Multiple Airlines
Tue, Jan 19
8:45 pm - 4:20 pmOPO Porto-IAD Washington, D.C. Dulles Intl
24h 35m2 stops Bilbao Madrid Barajas
$402Multiple Airlines
Thu, Jan 21
1:35 pm - 4:20 pmOPO Porto-IAD Washington, D.C. Dulles Intl
31h 45m2 stops Malaga Madrid Barajas
$404Multiple Airlines
Mon, Nov 30
5:40 pm - 2:45 pmOPO Porto-IAD Washington, D.C. Dulles Intl
50h 05m3 stops Marrakech Menara Casablanca Mohamed V Riyadh King Khaled Intl
$405Multiple Airlines
Recent last minute flight deals from Porto to Dulles Intl
Mon, Oct 12 - Sun, Oct 18
7:55 pm - 3:35 pmOPO Porto-IAD Washington, D.C. Dulles Intl
24h 40m1 stop Amsterdam Schiphol
9:45 pm - 3:30 pmIAD Washington, D.C. Dulles Intl-OPO Porto
12h 45m1 stop Paris Charles de Gaulle
$732KLM
Mon, Oct 12 - Sun, Oct 18
8:05 pm - 2:15 pmOPO Porto-IAD Washington, D.C. Dulles Intl
23h 10m1 stop Geneva Geneve-Cointrin
12:43 pm - 12:00 pmIAD Washington, D.C. Dulles Intl-OPO Porto
18h 17m2 stops Montreal Pierre Elliott Trudeau Intl Zurich
$932Multiple Airlines
Mon, Oct 12 - Sun, Oct 18
5:00 am - 5:33 pmOPO Porto-IAD Washington, D.C. Dulles Intl
17h 33m2 stops Amsterdam Schiphol New York John F Kennedy Intl
6:32 pm - 3:30 pmIAD Washington, D.C. Dulles Intl-OPO Porto
15h 58m2 stops New York John F Kennedy Intl Paris Charles de Gaulle
$1,437Delta
Mon, Oct 12 - Sun, Oct 18
7:55 pm - 8:55 amOPO Porto-IAD Washington, D.C. Dulles Intl
42h 00m3 stops Madrid Barajas Addis Ababa Bole Rome Fiumicino
10:55 am - 7:15 amIAD Washington, D.C. Dulles Intl-OPO Porto
39h 20m2 stops Addis Ababa Bole Madrid Barajas
$3,076Ethiopian Air
Sun, Oct 11 - Wed, Oct 14
4:35 pm - 1:35 pmOPO Porto-IAD Washington, D.C. Dulles Intl
26h 00m1 stop Frankfurt am Main
5:15 pm - 11:25 pmIAD Washington, D.C. Dulles Intl-OPO Porto
25h 10m2 stops Boston Logan Intl Munich Franz Josef Strauss
$7,289Lufthansa
Sun, Oct 11 - Tue, Oct 13
7:20 pm - 4:45 pmOPO Porto-IAD Washington, D.C. Dulles Intl
26h 25m1 stop Zurich
8:20 pm - 5:35 pmIAD Washington, D.C. Dulles Intl-OPO Porto
16h 15m1 stop Zurich
$7,311SWISS
Sun, Oct 11 - Wed, Oct 14
12:15 pm - 4:45 pmOPO Porto-IAD Washington, D.C. Dulles Intl
33h 30m1 stop Zurich
8:20 pm - 7:55 amIAD Washington, D.C. Dulles Intl-OPO Porto
30h 35m1 stop Zurich
$7,414SWISS
Sun, Oct 11 - Tue, Oct 13
12:15 pm - 4:45 pmOPO Porto-IAD Washington, D.C. Dulles Intl
33h 30m1 stop Zurich
8:20 pm - 5:15 pmIAD Washington, D.C. Dulles Intl-OPO Porto
15h 55m2 stops Zurich Geneva Geneve-Cointrin
$7,562SWISS
Sun, Oct 11 - Tue, Oct 13
8:40 am - 4:45 pmOPO Porto-IAD Washington, D.C. Dulles Intl
13h 05m1 stop Zurich
8:20 pm - 7:55 amIAD Washington, D.C. Dulles Intl-OPO Porto
30h 35m1 stop Zurich
$10,161SWISS
Sun, Oct 11 - Tue, Oct 13
6:20 am - 7:25 pmOPO Porto-IAD Washington, D.C. Dulles Intl
18h 05m1 stop Munich Franz Josef Strauss
5:15 pm - 11:25 pmIAD Washington, D.C. Dulles Intl-OPO Porto
25h 10m2 stops Boston Logan Intl Munich Franz Josef Strauss
$10,179Lufthansa
Booking Insights
Price, demand and travel trends for Porto to Washington, D.C. Dulles Intl Airport flights
Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.
Prices
Airlines
Layovers
How much is a round-trip flight from Porto to Washington, D.C. Dulles Intl Airport?
This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Porto to Washington, D.C. Dulles Intl Airport departing in october.What's the cheapest day of the week to fly from Porto to Washington, D.C. Dulles Intl Airport?
Based on deals KAYAK users found in the last 12 months, Monday is the cheapest day of the week to fly from Porto to Washington, D.C. Dulles Intl Airport. It’s 7% cheaper than the average day, while Sunday is the most expensive, with prices 270% higher.
What’s the cheapest month to fly from Porto to Washington, D.C. Dulles Intl Airport?
KAYAK internal proprietary data takes all prices for each month over the last 12 months for round-trip flights from Porto to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers and then takes the median of all values for each month.•March is the cheapest month to fly from Porto to Washington, D.C. Dulles Intl Airport at $475 round-trip.
•January ($1,077) and July ($890) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 126% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.
Round-trip flights from Porto to Washington, D.C. Dulles Intl Airport typically range from $589 to $804. The lowest price found in the past 5 days was $471, on American Airlines.
What’s the most popular layover airport when flying from Porto to Washington, D.C. Dulles Intl Airport?
KAYAK data for 1-stop round-trips over the past 3 months. Only counts itineraries with the same layover on both legs.Lisbon Humberto Delgado (LIS) is the most popular layover for the Porto to Washington, D.C. Dulles Intl Airport route. 39% of KAYAK users who booked 1-stop round-trips over the past 3 months connected via LIS.
What is the cheapest layover airport when flying from Porto to Washington, D.C. Dulles Intl Airport?
Flights via Madrid Barajas (MAD) offer the most affordable fares, with an average round-trip price of $597. Based on KAYAK data over the past 3 months.
Key details for Porto to Washington, D.C. Dulles Intl Airport flights
Low season | January |
|---|---|
High season | April |
Cheapest flight | $378 |
When to book flights from Porto to Dulles Intl
Are your dates flexible? Find out the best times to travel from Porto to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.
Your Porto to Washington, D.C. Dulles Intl Airport flight questions, answered
Find helpful answers about this route, including flight times, airports, airlines and booking tips.
Your guide to booking Porto to Washington, D.C. Dulles Intl Airport flights
Get tips on when to book, when to fly and what to know before your trip.More options for your flight from Porto to Dulles Intl
Complete your trip to Washington, D.C. with a hotel stay or car rental
Information on your arrival and departure airports
Cabin class types available on flights to Dulles Intl
Cabin classes available on flights from Porto to Dulles Intl. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
Find direct flights to and from Porto and Dulles Intl
Flights from domestic origins to Dulles Intl
Choose which airport to fly into in Porto
Flights to other popular destinations
The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.