Price observed over the last 3 months for a round trip.
Compare all flight tickets and find cheap flights from Boston to Lisbon
The cheapest flights right now
Boston – Lisbon
Outbound – Dec 7, 2026
direct
6h 35m Return – Dec 15, 2026
direct
8h 0m $715
today
Boston – Lisbon
Outbound – Nov 10, 2026
direct
6h 35m Return – Nov 18, 2026
direct
8h 0m $685
yesterday
Boston – Lisbon
Outbound – Nov 10, 2026
direct
6h 35m Return – Nov 18, 2026
direct
8h 0m $684
2 days ago
Boston – Lisbon
Outbound – Dec 7, 2026
direct
6h 35m Return – Dec 15, 2026
direct
8h 0m $683
today
* Prices are in USD per passenger, including taxes, for a round trip. Prices are based on searches carried out within the last 72 hours. Please note that availability and ticket prices are subject to change and should not be considered as the final price quoted.
Cheapest flight tickets
$350
Average price of a round trip
$677
Average flight ticket price recorded over the last 3 months for a round trip.
Flight duration
6h20
A flight from Boston to Lisbon takes on average 6h20.
Best time
November
According to user searches, the ideal month to go to Lisbon is November.
What is the cheapest month for this flight?
Monthly price data (Table View)
October
Oct
$0
November
Nov
$858
December
Dec
$931
January
Jan
$477
February
Feb
March
Mar
April
Apr
May
May
$774
June
Jun
$0
July
Jul
$1,008
August
Aug
$598
September
Sep
$859
* The prices shown are an average per month of the prices found by Liligo users during the last 30 days.
The best flight deals for a week
Boston – Lisbon
Outbound – Dec 22, 2026
1 stop
11h 25m EWR
Return – Dec 28, 2026
direct
8h 0m $1,048
2 days ago
Boston – Lisbon
Outbound – Dec 22, 2026
2 stops
11h 45m TER
HOR
Return – Dec 28, 2026
direct
8h 0m $1,043
2 days ago
Boston – Lisbon
Outbound – Dec 22, 2026
2 stops
11h 45m TER
HOR
Return – Dec 28, 2026
direct
7h 55m $1,097
2 days ago
Boston – Lisbon
Outbound – Dec 22, 2026
direct
6h 25m Return – Dec 28, 2026
direct
7h 44m $1,082
2 days ago
* Prices are in USD per passenger, including taxes, for a round trip. Prices are based on searches carried out within the last 72 hours. Please note that availability and ticket prices are subject to change and should not be considered as the final price quoted.
Tips for finding a cheap flight from Boston to Lisbon
Check out our tips for booking your flight to Lisbon (Portugal) from Boston (USA) at the cheapest possible price.
Usually, the cheapest month to pick up a ticket on this route is December, with an average flight ticket price of $444 (calculation over the last two years). The most touristic season corresponds to the months of October, November and December.
For the cheapest flights, it is advisable to buy your ticket at least 18 days before the departure date.
The airline offering the cheapest flight tickets is TAP Air Portugal. A ticket from the airline TAP Air Portugal to Lisbon costs on average $639.
The airlines that offer the most flights are TAP Air Portugal and TAP Air Portugal.
Price of flight tickets from Boston to Lisbon
Here is some information and tips to know before booking your flight:
- Flight ticket prices range from $350 to $1121
- The average price of a flight ticket is about $677
- Prices are lowest for stays in the month of December
- The month in which booking a ticket is cheaper is: October
info departure city :
Boston, USA
airport :
Boston-Logan International Airport (BOS)
local time :
Boston is a city in the country USA, the time zone is [[timezone]]. In Boston, it is currently {fromLocalTime}, the temperature is on average 15°C, with a minimum of 10°C and a maximum of 19°C.
The city of Boston has 1 airport(s): Boston-Logan
destination info :
Lisbon, Portugal
airport :
Lisbon-Humberto Delgado Airport (LIS)
local time :
Lisbon is in the country Portugal, the time zone is [[timezone]]. In Lisbon, it is currently {toLocalTime}, the temperature is on average 20°C, with a minimum of 18°C and a maximum of 23°C.
The city of Lisbon has 1 airport(s): Lisbon-Humberto Delgado
Useful info about Lisbon
What is the least touristic period to go to Lisbon?
If you want to visit Lisbon during the least touristic period, choose the month of November.
What is the most popular time to travel to Lisbon?
In Lisbon, the most popular month is October. It is during this period that the prices offered by airlines are also the highest.
When should I book my flight from Boston to Lisbon?
According to our data, it is recommended to book your flight 18 days before your departure. If you book your flight ticket 3 weeks before your departure, you may find a price below average. The cheapest day to book a flight from Boston to Lisbon is Tuesday.
What are the arrival and destination airports when traveling between Boston and Lisbon?
When you leave, you can leave from Boston-Logan, and you will arrive at Lisbon-Humberto Delgado.
How to reach Boston airport from the city centre?
This information is not available at this time.
Are there other means of transportation to go from Boston to Lisbon?
Airplane is the only means of transportation listed on Liligo for this journey.
Are there big differences in weather between Boston and Lisbon?
In summer, the average temperature is 21°C in Lisbon and 22°C in Boston. The average rainfall in summer is 6 mm in Lisbon and 106 mm in Boston. In summer, it is warmer in Boston and it rains less in Lisbon. In winter, it is colder in Lisbon and it rains more in Boston.
