Cheap flights from Porto to the United States from $261

In general, July 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 $285. If you aren’t able to travel during the month of July, then book flights to United States from Porto during May instead. Flights to United States in May, while not as cheap as those in July, still average around $299.

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 $647. 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 Monday because tickets tend to average around $820. 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 at noon when flights can be purchased for as low as $625. Try not to purchase tickets in the morning because they tend to be around $737. 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 $598 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.

LEVEL, British Airways, and Air Transat are the most popular carriers operating from Porto to United States

TAP AIR PORTUGAL, United Airlines and Air Europa 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 59% 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 153 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.

Tuesday 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 16% of their flights experiencing any sort of delay.

As of May 2026, there are 7 flights per day flying from Porto to United States. The most common time of day flights depart is 12:00PM, with 60% of flights taking off in the afternoon.

53 flights are operational weekly from Porto to United States as of May 2026. The most popular departure day for this route is Thu, with 17% of flights per week taking off on this day.