Flight price alerts: Lisbon → Boston
Sample round trips on this route start around EUR 392; December 2026 is often the cheapest month in our next-3-month window. FlexTrip Alerts is a free email service — set flexible travel dates and a max price, and we notify you when a round trip fits. We check fares about four times per day; we do not sell tickets.
Set a free tracker with flexible dates and your max price. We email you only when a round trip fits.
Sample fares from EUR 392. Cheapest month in our next-3-month sample: December 2026.
Set an alert and we email you when a round trip drops under your limit.
Set a price alertRound trips on this route
Cheapest-seen sample fares (next 3 months) — confirm the final price on the booking site when you click through.
Last updated .
- See deal
- Round trip · 8 nights
- Sun 27 Dec · 11:05
- Return Mon 04 Jan · 19:10
EUR 392
- See deal
- Round trip · 7 nights
- Sat 09 Jan · 07:00
- Return Sat 16 Jan · 21:30
EUR 510
- See deal
- Round trip · 12 nights
- Sun 08 Nov · 12:20
- Return Fri 20 Nov · 20:05
EUR 1005
| Depart | Return | Stay | Price | Book |
|---|---|---|---|---|
| Sun 27 Dec · 11:05 | Mon 04 Jan · 19:10 | 8 nights | EUR 392 | See deal |
| Sat 09 Jan · 07:00 | Sat 16 Jan · 21:30 | 7 nights | EUR 510 | See deal |
| Sun 08 Nov · 12:20 | Fri 20 Nov · 20:05 | 12 nights | EUR 1005 | See deal |
Frequently asked questions
- How do I get email alerts when Lisbon to Boston flights drop in price?
- Create a free FlexTrip Alerts tracker for Lisbon Humberto Delgado Airport (LIS) to Boston Logan International Airport (BOS). Choose your flexible departure window, stay length, and maximum price — we email you when a round trip fits.
- Does FlexTrip Alerts book flights from Lisbon to Boston?
- No — we do not sell tickets. FlexTrip Alerts watches prices and emails you when a fare matches your plan. You book on the airline or travel site you prefer when you receive an alert.
- Can I set flexible travel dates for Lisbon to Boston alerts?
- Yes. Pick a departure window (not one fixed day) and how many nights you can stay. We match round trips that fit your window, stay length, and max price — then email you when one qualifies.
- How often does FlexTrip Alerts check Lisbon to Boston fares?
- We scan aggregated fares on a schedule — about four times per day (every ~6 hours, UTC). You can also trigger an on-demand check from your dashboard, with a short cooldown between manual refreshes.
- What is the cheapest month to fly from Lisbon to Boston?
- Based on recent fare samples on this page, December 2026 is currently the cheapest month to fly from Lisbon to Boston, with round trips from about EUR 392. Prices change — set an alert to catch the next drop.
More routes from Lisbon
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