Cheap flights from Portugal to the United States from $318

In general, February is the cheapest month to fly from Portugal to United States. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $631. If you aren’t able to travel during the month of February, then book flights to United States from Portugal during January instead. Flights to United States in January, while not as cheap as those in February, still average around $645.

According to our data, Thursday is the cheapest day to fly to United States from Portugal. The lowest ticket price found for a Thursday departure recently was $755. 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 Sunday because tickets tend to average around $892. 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 $779. Try not to purchase tickets in the morning because they tend to be around $819. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Lisbon Humberto Delgado to Boston Logan Intl for the best Portugal - United States flight prices

You are more likely to see cheaper flights to United States from Portugal when booking weeks ahead of your departure date. In general, you can expect to find flights to United States for around $686 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United States from Portugal for as low as $558 on momondo.

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

Scandinavian Airlines, Azores Airlines, and KLM are the most popular carriers operating from Portugal to United States

TAP AIR PORTUGAL, United Airlines and Delta are the top three most popular airlines that fly to United States from Portugal according to our data. TAP AIR PORTUGAL is the first choice among our users, with 57% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 13 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 24% of flights between Portugal and United States have experienced a delay on any given week. The average delay length over the past 12 months has been 135 minutes.

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

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

According to our data, Delta have had the least number of delays on this route over the last 12 months; with about 19% of their flights experiencing any sort of delay.

As of September 2026, there are 35 flights per day flying from Portugal to United States. The most common time of day flights depart is 12:00PM, with 60% of flights taking off in the afternoon.

As of September 2026, 247 flights take off from Portugal and land in United States each week. The most common flight departure day for this route is Mon, with 23% of weekly flights taking off on this day.