AirHint found the following cheapest return flights from Boston (BOS) to Lisbon (LIS) in April 2026 (see full year).

Return flights

15 Apr - 21 Apr	Iberia For Level
27 Apr - 20 May	Iberia For Level
25 Apr - 02 May	SWISS
28 Apr - 29 Apr	Iberia For Level
15 Apr - 24 Apr	Air Canada
16 Apr - 29 Apr	Air Canada
16 Apr - 09 May	British Airways
24 Apr - 02 May	SWISS
19 Apr - 03 May	SWISS
04 Apr - 25 Apr	Air Canada
10 Apr - 18 Apr	Aer Lingus
02 Apr - 09 Apr	TAP	direct
22 Apr - 29 Apr	TAP	direct
27 Apr - 20 May	TAP	direct
27 Apr - 04 May	TAP	direct
25 Apr - 02 May	Virgin Atlantic	direct
16 Apr - 29 Apr	TAP	direct
12 Apr - 19 Apr	TAP	direct
16 Apr - 09 May	TAP	direct
19 Apr - 03 May	Virgin Atlantic	direct

Also check the deals for one-way flights from Boston to Lisbon in April.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Cheapest return flights from Boston to Lisbon in April from 398€

Return flights