Cheap flights from Boston to Madrid from C$ 465

In general, October is the cheapest month to fly from Boston to Madrid. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 627. If you aren’t able to travel during the month of October, then book flights to Madrid from Boston during September instead. Flights to Madrid in September, while not as cheap as those in October, still average around C$ 668.

Our data shows that Tuesday is the least expensive day to fly to Madrid. Tickets to fly out on this day can be as low as C$ 634. On the other hand, Monday is the most expensive day to depart from Boston because it is more convenient for both business and leisure travellers. As a result, prices tend to be around C$ 713.

According to our data, the cheapest time of day to fly to Madrid is in the afternoon. momondo users have found flights departing from Boston to Madrid in the afternoon for as low as C$ 657. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Madrid are more costly in the evening, with an average ticket price of C$ 678. 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 C$ 836 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 C$ 712 on momondo.

You could potentially save up to 58% 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.

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

Wednesday is statistically the day of the week that experiences the fewest 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 has had the least delays on this route over the last 12 months, with about 6% of their flights experiencing any sort of delay.

Montreal (YUL) was the most common stop: 50% of momondo users choosing one-stop flights on this route connected there.

Flights via Lisbon (LIS) offer the lowest average round-trip price of C$ 518.

Flights connecting via Lisbon (LIS) have the shortest average one-way travel time: 9h 25m.

Lisbon (LIS) has the shortest average layover time for this route: 1h 45m.

As of May 2026, 10 flights take off from Boston and land in Madrid each day. The most common flight departure time for this route is 5:00p.m., with 55% of daily flights taking off in the afternoon.

The number of flights available between Boston and Madrid is 76 per week as of May 2026. The most frequent departure day is Mon, with 18% of weekly flights leaving on this day.