$391 Find Cheap Flights from Porto to Washington - 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 Washington departing on 9/14. 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
1 adult, Economy, 0 bags

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Flight Deals

Book Cheap Porto to Washington Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Porto to Washington 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 Washington

Thu, Oct 1 - Mon, Oct 5
Multiple Airlines Logo
6:40 am - 8:40 pm
OPO
-
SEA
22h 00m
2 stops
Multiple Airlines Logo
3:40 pm - 10:00 am
SEA
-
OPO
34h 20m
3 stops
$789Multiple Airlines
Thu, Oct 1 - Mon, Oct 5
Multiple Airlines Logo
6:40 am - 8:40 pm
OPO
-
SEA
22h 00m
2 stops
Multiple Airlines Logo
3:40 pm - 11:20 pm
SEA
-
OPO
23h 40m
2 stops
$798Multiple Airlines
Thu, Oct 1 - Mon, Oct 5
Multiple Airlines Logo
12:25 pm - 9:54 pm
OPO
-
SEA
41h 29m
2 stops
Multiple Airlines Logo
9:50 pm - 11:40 pm
SEA
-
OPO
17h 50m
1 stop
$873Multiple Airlines
Mon, Aug 24 - Sun, Aug 30
Multiple Airlines Logo
7:10 pm - 1:45 pm
OPO
-
SEA
26h 35m
2 stops
Multiple Airlines Logo
3:55 pm - 10:40 am
SEA
-
OPO
34h 45m
3 stops
$934Multiple Airlines
Mon, Aug 24 - Sun, Aug 30
Multiple Airlines Logo
8:00 pm - 11:37 am
OPO
-
SEA
23h 37m
1 stop
Multiple Airlines Logo
1:30 pm - 3:30 pm
SEA
-
OPO
18h 00m
1 stop
$937Multiple Airlines
Thu, Oct 1 - Mon, Oct 5
Delta Logo
5:00 am - 4:35 pm
OPO
-
SEA
19h 35m
1 stop
Delta Logo
6:45 pm - 10:00 pm
SEA
-
OPO
19h 15m
1 stop
$938Delta
Thu, Oct 1 - Mon, Oct 5
Multiple Airlines Logo
7:00 am - 8:40 pm
OPO
-
SEA
21h 40m
3 stops
Multiple Airlines Logo
7:00 pm - 12:40 am
SEA
-
OPO
21h 40m
3 stops
$939Multiple Airlines
Mon, Aug 24 - Sun, Aug 30
Lufthansa Logo
4:35 pm - 11:55 am
OPO
-
SEA
27h 20m
1 stop
Lufthansa Logo
2:10 pm - 3:40 pm
SEA
-
OPO
17h 30m
1 stop
$959Lufthansa
Mon, Sep 14 - Sat, Sep 19
Turkish Airlines Logo
6:30 am - 10:45 pm
OPO
-
SEA
48h 15m
2 stops
Turkish Airlines Logo
7:15 pm - 9:40 am
SEA
-
OPO
30h 25m
1 stop
$960Turkish Airlines
Tue, Aug 18 - Fri, Aug 28
Multiple Airlines Logo
7:10 am - 8:40 pm
OPO
-
SEA
21h 30m
2 stops
Multiple Airlines Logo
3:40 pm - 6:30 pm
SEA
-
OPO
18h 50m
2 stops
$961Multiple Airlines
Booking Insights

KAYAK's insights & trends for Porto to Washington flights

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

What is the cheapest month to fly from Porto to Washington?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Porto to Washington, 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 Porto to Washington is February, when tickets cost $0 (return) on average. On the other hand, the most expensive months are July and December, when the average cost of round-trip tickets is $1,429 and $1,038 respectively.

Find deals

Good to know

Low seasonMay
Cheapest flight$391
Best time to beat the crowds with an average 44% drop in price.
Most popular time to fly and prices are also 32% lower on average.
Flight from Porto to Seattle

FAQs - booking Washington flights

  • How does KAYAK find such low prices on flights from Porto to Washington?

    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 Porto to Washington.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Porto to Washington 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 Porto to Washington?

    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 Porto to Washington 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 Porto to Washington?

    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 Porto to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Porto to Washington

Information on your arrival and departure airports

Porto (OPO)