£169 Cheap Flights from Washington (IAD) to Porto (OPO)

You can find one-way and return flights from IAD to OPO with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when IAD to OPO ticket fares go up or down.

The cheapest months to fly from IAD to OPO are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.

Enter IAD to OPO and your travel dates, then apply the 'Nonstop' filter to see only direct flights.

Royal Air Maroc is one of the cheapest airlines offering connecting return flights from Washington Dulles Intl. (IAD) to Dr. Francisco de Sa Carneiro (OPO), with tickets starting from around £602 for flights that can be booked for departure within the next year. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.

To find a cheap flight from Washington, DC (IAD-Washington Dulles Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.

The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.

There are approximately 63 connecting flights per day from Washington Dulles Intl. (IAD) to Dr. Francisco de Sa Carneiro (OPO). Some common connection points include Pearson Intl. (YYZ), Pierre Elliott Trudeau Intl. (YUL), and Hartsfield-Jackson Atlanta Intl. (ATL).

The earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) typically departs around 5:00 AM. This service is offered by American Airlines. This is a seasonal service active in March. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.

You'll typically find the most flights from Washington, DC (IAD-Washington Dulles Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) on a Saturday, with around 68 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include United, Delta, and British Airways. Looking at the week, Saturdays offer notably more flight options compared to other days, making it a great day to consider for your journey.

The most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) are in the afternoon, from 3pm to 6pm. Many major carriers, including United, TAP Portugal and Lufthansa, offer flights during this window. Many travellers prefer this because it allows for a productive morning before heading to the airport, and you'll arrive in Porto in the evening, ready to settle in.

There are no nonstop flights from Washington, DC (IAD-Washington Dulles Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro). The distance between these two cities is approximately 5,697 kilometres. Flights with one stop typically take around 16 hours 18 minutes. If you have two or more stops, your journey will be longer, usually around 17 hours 18 minutes. Keep in mind that actual flight times can vary due to factors like layover duration, routing, and weather conditions.

Yes, you can fly business class or first class between IAD and OPO. Airlines that offer business class service on this route include:

* Lufthansa
* Air France
* Iberia
* Swiss International Air Lines
* TAP Portugal
* Air Canada
* Brussels Airlines
* KLM
* SAS
* Icelandair
* Royal Air Maroc
* Virgin Atlantic
* Turkish Airlines
* Delta
* PSA Airlines
* British Airways
* United
* Austrian Airlines

First class cabins are available on Lufthansa and Swiss International Air Lines.

It's easy to earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

If you're planning to travel to Porto from Washington Dulles Intl. (IAD), you can fly directly into Dr. Francisco de Sa Carneiro (OPO). Some flights may connect through major hubs like Heathrow (LHR), Charlotte-Douglas Intl. (CLT), or Pearson Intl. (YYZ) before reaching Porto. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Typically, booking a last minute flight from Washington, DC (IAD-Washington Dulles Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.

Securing a Washington, DC (IAD-Washington Dulles Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.

If you booked your Washington, DC (IAD-Washington Dulles Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.