Cheap flights from Boston to Madrid from $331

The month of October is, on average, the cheapest month to fly to Madrid from Boston, with most prices found around $457. If you don’t want to visit Madrid in October, then you should wait until September to fly from Boston, when ticket prices are also cheap, with an average price of $487.

The cheapest day to depart on your flight to Madrid is on a Wednesday when prices can be found for as low as $584. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Madrid on Saturday is $711.

Flying to Madrid from Boston in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $626 when looking at flights departing in the afternoon. Flights to Madrid are more costly in the evening, with an average ticket price of $633. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Boston Logan Intl to Madrid Barajas for the best Boston Logan Intl - Madrid Barajas flight prices

You are more likely to see cheaper flights to Madrid from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Madrid for around $610 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Madrid from Boston for as low as $519 on momondo.

You could potentially save up to 9% on your flight if you consider stops on a Boston to Madrid flight.

As of May 2026, prices for Boston to Madrid flights are approximately 18% cheaper when compared to flights at the same time last year.

Delta, KLM, and United Airlines are the most popular carriers operating from Boston Logan Intl to Madrid Barajas

Iberia, JetBlue and British Airways are the top three most popular airlines that fly to Madrid from Boston according to our data. Iberia is the first choice among our users, with 58% of people opting to fly with this airline when traveling to Madrid. Keep in mind that there are 14 different airlines that fly to Madrid on a routine basis, so you have a few additional options to choose from.

Historically, on average around 8% of flights between Boston and Madrid have experienced a delay on any given week. The average delay length over the past 12 months has been 145 minutes.

Generally, flights departing in the evening tend to experience fewer delays. Flights at night 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, Iberia have had the least number of delays on this route over the last 12 months; with about 6% of their flights experiencing any sort of delay.

Lisbon (LIS) was the most common stop: 24% of momondo users choosing 1-stop flights on this route connected there.

Flights via Zurich (ZRH) offer the lowest average round-trip price of $417.

Flights connecting via Barcelona (BCN) have the shortest average one-way travel time: 10h 00m.

Amsterdam (AMS) has the shortest average layover time for this route: 2h 06m.

The number of flights available between Boston and Madrid is 11 per day as of May 2026. The most frequent departure time is 5:00PM, with 55% of daily flights leaving in the afternoon.

80 flights are operational weekly from Boston to Madrid as of May 2026. The most popular departure day for this route is Mon, with 18% of flights per week taking off on this day.