Cheap flights from the United States to Porto from $197

The month of February is, on average, the cheapest month to fly to Porto from United States, with most prices found around $639. If you aren’t able to travel during the month of February, then book flights to Porto from United States during January instead. Flights to Porto in January, while not as cheap as those in February, still average around $645.

The cheapest day to depart on your flight to Porto is on a Monday when prices can be found for as low as $845. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $950. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

In the morning is the cheapest time of day to fly from United States to Porto when you can find flight prices for as low as $576. Flying to Porto in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,036 on average. Flights to Porto from United States in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You are more likely to see cheaper flights to Porto from United States when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $778 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from United States for as low as $750 on momondo.

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

SWISS, Iberia, and Delta are the most popular carriers operating from United States to Porto

TAP AIR PORTUGAL, United Airlines and Delta are the top three most popular airlines that fly to Porto from United States 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 Porto. Keep in mind that there are 17 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

Historically, on average around 20% of flights between United States and Porto have experienced a delay on any given week. The average delay length over the past 12 months has been 163 minutes.

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

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

According to our data, TAP AIR PORTUGAL have had the least number of delays on this route over the last 12 months; with about 15% of their flights experiencing any sort of delay.

The number of flights available between United States and Porto is 9 per day as of September 2026. The most frequent departure time is 9:00PM, with 100% of daily flights leaving in the evening.

66 flights are operational weekly from United States to Porto as of September 2026. The most popular departure day for this route is Thu, with 20% of flights per week taking off on this day.