Flight price alerts: Lisbon → Boston
Sample round trips on this route start around EUR 508; October 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 508. Cheapest month in our next-3-month sample: October 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 · 9 nights
- Thu 01 Oct · 07:20
- Return Sat 10 Oct · 07:25
EUR 508
- See deal
- Round trip · 20 nights
- Tue 11 Aug · 12:15
- Return Mon 31 Aug · 20:25
EUR 810
- See deal
- Round trip · 14 nights
- Mon 17 Aug · 11:55
- Return Mon 31 Aug · 20:25
EUR 821
- See deal
- Round trip · 10 nights
- Mon 17 Aug · 11:55
- Return Thu 27 Aug · 17:10
EUR 843
- See deal
- Round trip · 14 nights
- Thu 13 Aug · 05:35
- Return Thu 27 Aug · 17:10
EUR 874
- See deal
- Round trip · 27 nights
- Tue 11 Aug · 05:35
- Return Mon 07 Sept · 21:45
EUR 875
- See deal
- Round trip · 11 nights
- Sun 16 Aug · 19:45
- Return Thu 27 Aug · 17:10
EUR 890
| Depart | Return | Stay | Price | Book |
|---|---|---|---|---|
| Thu 01 Oct · 07:20 | Sat 10 Oct · 07:25 | 9 nights | EUR 508 | See deal |
| Tue 11 Aug · 12:15 | Mon 31 Aug · 20:25 | 20 nights | EUR 810 | See deal |
| Mon 17 Aug · 11:55 | Mon 31 Aug · 20:25 | 14 nights | EUR 821 | See deal |
| Mon 17 Aug · 11:55 | Thu 27 Aug · 17:10 | 10 nights | EUR 843 | See deal |
| Thu 13 Aug · 05:35 | Thu 27 Aug · 17:10 | 14 nights | EUR 874 | See deal |
| Tue 11 Aug · 05:35 | Mon 07 Sept · 21:45 | 27 nights | EUR 875 | See deal |
| Sun 16 Aug · 19:45 | Thu 27 Aug · 17:10 | 11 nights | EUR 890 | 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, October 2026 is currently the cheapest month to fly from Lisbon to Boston, with round trips from about EUR 508. Prices change — set an alert to catch the next drop.
More routes from Lisbon
View all 8 routes from LisbonSet alerts for other destinations from Lisbon Humberto Delgado Airport (LIS).
Flying to Boston?
See all 6 departure cities with price alerts into Boston Logan International Airport (BOS).
View routes to Boston