Flights from Lisbon to Boston

The cheapest round-trip from Lisbon to Boston is about 309 EUR, usually in October 2026; May 2027 is priciest, so booking the low month saves around 285 EUR (~48%). Typical fare ~515 EUR, from 330 priced fares. Flightmussy live data, updated 2026-06-13.

Cheap flights from Lisbon (LIS) to Boston (BOS). Free, no signup, no ads, no tracking. Compare every airline across 12 months of fares on one heatmap — including low-cost carriers Google Flights often deprioritises.

Fare insights: Lisbon to Boston

Cheapest round-trip seen: 309 EUR, usually around October 2026. Typical fare ~515 EUR. Across the year prices range roughly 309–594 EUR — about 48% cheaper in the low season than the peak (May 2027). Carriers on this route include LEVEL, Iberia, Delta, KLM.

Based on Flightmussy's live 12-month fare data; prices last updated 2026-06-13. Prices change constantly — search live for current fares.

Cheapest fare by month: Lisbon to Boston

The lowest round-trip fare we found for each month over the coming year — low season versus peak at a glance. October 2026 is cheapest; May 2027 is priciest.

Jun 2026528 EUR
Jul 2026502 EUR
Aug 2026539 EUR
Sep 2026383 EUR
Oct 2026309 EUR
Nov 2026445 EUR
Dec 2026445 EUR
Jan 2027474 EUR
Feb 2027565 EUR
Mar 2027588 EUR
Apr 2027588 EUR
May 2027594 EUR

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Frequently asked questions

What is the cheapest month to fly from Lisbon to Boston?
The cheapest round-trip fares from Lisbon to Boston start around 309 EUR and are typically lowest in October 2026; May 2027 is the most expensive. Fares swing about 48% across the year. (Flightmussy live data, updated 2026-06-13.)
How much does a flight from Lisbon to Boston typically cost?
Typical round-trip is ~515 EUR; across the year fares run 309–594 EUR, cheapest 309 EUR in October 2026. Based on 330 priced fares, updated 2026-06-13.
How much can I save flying Lisbon to Boston in the cheapest month?
Booking the October 2026 low instead of the May 2027 peak saves about 285 EUR (~48%) per round-trip. Updated 2026-06-13.
Which airlines fly from Lisbon to Boston?
Carriers seen on Lisbon → Boston in recent searches: LEVEL, Iberia, Delta, KLM. Flightmussy compares every carrier serving Lisbon → Boston, including budget airlines like Ryanair, easyJet, Wizz Air and AirAsia that Google Flights often deprioritises.
Do I need to sign up to search flights from Lisbon to Boston?
No. Flightmussy is free and requires no account, no email, and no credit card. Search, compare, and click through to book directly with the airline or booking partner.

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About Flightmussy

Flightmussy is a free, independent flight search for travellers anywhere in the world. No signup, no ads, no tracking — email is optional, only for route price alerts. Compare fares across every airline and see 12 months of prices at a glance, including the low-cost carriers Google Flights often buries. Book directly with the airline or a trusted partner — we never add a markup.

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Flightmussy runs its own 12-month forward fare scans across thousands of routes worldwide and publishes the data openly. Read the cheapest month to fly almost anywhere → — a global study of when fares are lowest — or browse the cheapest destinations from a city:

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