Cheap flights from Boston to Portugal from $252

The cheapest month to fly to Portugal from Boston is in November. Flight prices, which tend to average around $565, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Portugal from Boston during February instead. Flights to Portugal in February, while not as cheap as those in November, still average around $590.

According to our data, Monday is the cheapest day to fly to Portugal from Boston. The lowest ticket price found for a Monday departure recently was $795. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Saturday, with ticket prices averaging around $903.

Our most recent data shows that the best time of day to fly to Portugal is in the afternoon. Flights from Boston to Portugal during this time can be as low as $801. In the evening is when there is more demand to fly to Portugal, so prices are often more expensive at around $866 per ticket.

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

You are more likely to see cheaper flights to Portugal from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $829 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Boston for as low as $715 on momondo.

There are 4 cabin classes available to choose from on Boston to Portugal flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

TAP AIR PORTUGAL, Azores Airlines, and KLM are the most popular carriers operating from Boston Logan Intl to Portugal

TAP AIR PORTUGAL, Azores Airlines and Delta are the top three most popular airlines that fly to Portugal from Boston according to our data. TAP AIR PORTUGAL is the first choice among our users, with 64% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 20 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

Historically, on average around 24% of flights between Boston and Portugal have experienced a delay on any given week. The average delay length over the past 12 months has been 132 minutes.

Generally, flights departing in the evening tend to experience fewer delays. Flights in the morning 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. Tuesday 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 16% of their flights experiencing any sort of delay.

The number of flights available between Boston and Portugal is 11 per day as of June 2026. The most frequent departure time is 11:00PM, with 91% of daily flights leaving in the evening.

As of June 2026, there are 77 flights per week flying from Boston to Portugal. The most common day of the week flights depart is Fri, with 18% of flights taking off on this day.