Philadelphia International (PHL) to Humberto Delgado (LIS).
| Departure | Return | Price |
|---|---|---|
| 06/01/2026 | 06/07/2026 | $955 |
| 06/02/2026 | 06/07/2026 | $955 |
| 06/01/2026 | 06/09/2026 | $960 |
| 06/02/2026 | 06/09/2026 | $960 |
| 06/08/2026 | 06/17/2026 | $960 |
| 06/08/2026 | 06/16/2026 | $961 |
| 06/04/2026 | 06/09/2026 | $972 |
| 06/09/2026 | 06/16/2026 | $1072 |
| 06/09/2026 | 06/17/2026 | $1072 |
| 06/06/2026 | 06/14/2026 | $1085 |
Based on current fares, August is the cheapest month to fly from Philadelphia to Lisbon, with average fares around $1197 round trip (as low as $1117).
May tends to be more expensive, averaging $1488.
See the full month-by-month and day-of-week price analysis
Best Time to Fly PHL → LISDeparture date prices (economy, round trip). Green = cheap, red = expensive.
The cheapest month to fly from Philadelphia to Lisbon is August, with average round-trip fares around $1197. Fares in August start as low as $1117. The most expensive month is May, averaging $1488.
A nonstop flight from Philadelphia to Lisbon takes approximately 7h.
The cheapest flight from Philadelphia to Lisbon currently starts at $955 round trip in economy class.
The average round-trip flight price from Philadelphia to Lisbon is $1442 in economy class.
The distance is 3320 miles (5342 km). with a nonstop flight time of about 7h. The lowest fare currently available is $955 departing in June. The average round-trip fare is $1442.
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