Cheap flights from Boston to Philadelphia from $139

The cheapest month to fly to Philadelphia from Boston is in January. Flight prices, which tend to average around $229, are often lower during this time because this is during the off-season. The month of February is another great option to travel to Philadelphia, with average flight prices from Boston averaging around $231.

The cheapest day to depart from Boston to Philadelphia is on a Thursday. Travelers who choose to depart for Philadelphia on a Thursday will often find tickets for as low as $339. On the other hand, Sunday is the most expensive day to depart from Boston because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $426.

According to our data, the cheapest time of day to fly to Philadelphia is in the evening. momondo users have found flights departing from Boston to Philadelphia in the evening for as low as $335. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Philadelphia is in the afternoon when prices are around $385.

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

You are more likely to see cheaper flights to Philadelphia from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around $277 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from Boston for as low as $157 on momondo.

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

Frontier is the most popular carrier operating from Boston Logan Intl to Philadelphia

American Airlines, Delta and JetBlue are the top three most popular airlines that fly to Philadelphia from Boston according to our data. American Airlines is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Philadelphia. Keep in mind that there are 5 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.

Historically, on average around 16% of flights between Boston and Philadelphia have experienced a delay on any given week. The average delay length over the past 12 months has been 129 minutes.

Generally, flights departing in the morning 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. Monday has historically seen more delays on average compared to the rest of the week.

According to our data, American Airlines 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 Boston and Philadelphia is 21 per day as of November 2026. The most frequent departure time is 7:00PM, with 48% of daily flights leaving in the afternoon.

As of November 2026, there are 149 flights per week flying from Boston to Philadelphia. The most common day of the week flights depart is Wed, with 21% of flights taking off on this day.