Cheap flights from Porto to the United States from $255

In general, February is the cheapest month to fly from Porto to United States. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $540. If you aren’t able to travel during the month of February, then book flights to United States from Porto during September instead. Flights to United States in September, while not as cheap as those in February, still average around $559.

According to our data, Thursday is the cheapest day to fly to United States from Porto. The lowest ticket price found for a Thursday departure recently was $646. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around $805. These prices are subject to change though, so be sure to set up a Price Alert for flights to United States.

The cheapest time of day to fly to United States is in the afternoon when flights can be purchased for as low as $634. Try not to purchase tickets in the morning because they tend to be around $742. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Porto to Boston Logan Intl for the best Porto - United States flight prices

You are more likely to see cheaper flights to United States from Porto when booking weeks ahead of your departure date. In general, you can expect to find flights to United States for around $606 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United States from Porto for as low as $481 on momondo.

There are 3 cabin classes available to choose from on Porto to United States flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

British Airways, American Airlines, and Iberia are the most popular carriers operating from Porto to United States

TAP AIR PORTUGAL, United Airlines and Iberia are the top three most popular airlines that fly to United States from Porto according to our data. TAP AIR PORTUGAL is the first choice among our users, with 60% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 5 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.

Historically, on average around 17% of flights between Porto and United States have experienced a delay on any given week. The average delay length over the past 12 months has been 157 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

Wednesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 17% of their flights experiencing any sort of delay.

As of March 2026, there are 4 flights per day flying from Porto to United States. The most common time of day flights depart is 6:00PM, with 63% of flights taking off in the evening.

29 flights are operational weekly from Porto to United States as of March 2026. The most popular departure day for this route is Mon, with 31% of flights per week taking off on this day.