Logan International (BOS) to Humberto Delgado (LIS). Served by TAP, JetBlue.
| Departure | Return | Price |
|---|---|---|
| 07/12/2026 | 07/21/2026 | $693 |
| 07/15/2026 | 07/21/2026 | $693 |
| 07/15/2026 | 07/22/2026 | $693 |
| 07/22/2026 | 07/28/2026 | $693 |
| 07/22/2026 | 07/29/2026 | $699 |
| 07/19/2026 | 07/28/2026 | $700 |
| 07/23/2026 | 07/28/2026 | $700 |
| 07/23/2026 | 07/29/2026 | $706 |
| 07/29/2026 | 08/04/2026 | $706 |
| 07/29/2026 | 08/05/2026 | $706 |
Based on current fares, July is the cheapest month to fly from Boston to Lisbon, with average fares around $814 round trip (as low as $693).
See the full month-by-month and day-of-week price analysis
Best Time to Fly BOS → LISDeparture date prices (economy, round trip). Green = cheap, red = expensive.
The cheapest month to fly from Boston to Lisbon is July, with average round-trip fares around $814. Fares in July start as low as $693. The most expensive month is May, averaging $940.
A nonstop flight from Boston to Lisbon takes approximately 6h 30m.
TAP and JetBlue fly from BOS to LIS. That's 2 airlines serving this route.
The cheapest flight from Boston to Lisbon currently starts at $693 round trip in economy class.
The average round-trip flight price from Boston to Lisbon is $925 in economy class.
The distance is 3210 miles (5165 km). with a nonstop flight time of about 6h 30m. Airlines on this route include TAP, JetBlue. The lowest fare currently available is $693 departing in July. The average round-trip fare is $925.
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