Cheap flights from Philadelphia to Lisbon from $297

In general, November is the cheapest month to fly from Philadelphia to Lisbon. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $731. If you are unable to visit Lisbon during the month of November, then departing from Philadelphia during the month January is also very affordable. Most momondo users find prices during this month for around $751.

Our data shows that Tuesday is the least expensive day to fly to Lisbon. Tickets to fly out on this day can be as low as $909. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Philadelphia to Lisbon for around $1,185.

The cheapest time of day to fly to Lisbon is in the evening when flights can be purchased for as low as $1,018. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,415 on average. Flights to Lisbon from Philadelphia in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Philadelphia to Lisbon Humberto Delgado for the best Philadelphia - Lisbon Humberto Delgado flight prices

You are more likely to see cheaper flights to Lisbon from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to Lisbon for around $979 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Lisbon from Philadelphia for as low as $824 on momondo.

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

You could potentially save up to 7% on your flight if you consider stops on a Philadelphia to Lisbon flight.

As of March 2026, prices for Philadelphia to Lisbon flights are approximately 11% cheaper when compared to flights at the same time last year.

British Airways is the most popular carrier operating from Philadelphia to Lisbon Humberto Delgado

TAP AIR PORTUGAL, United Airlines and Delta are the top three most popular airlines that fly to Lisbon from Philadelphia according to our data. TAP AIR PORTUGAL is the first choice among our users, with 67% of people opting to fly with this airline when traveling to Lisbon. Keep in mind that there are 23 different airlines that fly to Lisbon on a routine basis, so you have a few additional options to choose from.

Boston (BOS) was the most common stop: 63% of momondo users choosing 1-stop flights on this route connected there.

Flights via Boston (BOS) offer the lowest average round-trip price of $678.

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 10h 55m.

Dublin (DUB) has the shortest average layover time for this route: 1h 40m.

As of March 2026, 3 flights take off from Philadelphia and land in Lisbon each day. The most common flight departure time for this route is 9:00PM, with 100% of daily flights taking off in the evening.

As of March 2026, there are 24 flights per week flying from Philadelphia to Lisbon. The most common day of the week flights depart is Mon, with 17% of flights taking off on this day.