Find flights
Deals
When to book
FAQs

Cheap flights from Boston to Lisbon from C$ 507

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LIS
3 Jul — 10 Jul1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Boston Logan Intl to Lisbon Humberto Delgado are usually found in February or November, booked 85 days in advance, depart on a Friday or Thursday and return on a Monday

Cheap flight deals from Boston to Lisbon

Enter your travel dates to find the best prices.

Cheapest flights from Boston to Lisbon
Explore the most affordable flight options available from Boston to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 June 2026.

Tue 14/78:10 p.m.
BOS
-
LIS
1 stop32h 25m
Air Transat
Sun 26/711:35 a.m.
LIS
-
BOS
1 stop26h 30m
Air Transat
Deal found 31/5C$ 1,187
Fri 25/125:30 a.m.
BOS
-
LIS
1 stop23h 20m
United Airlines
Thu 31/121:00 p.m.
LIS
-
BOS
2 stops28h 43m
United Airlines
Deal found 2/6C$ 1,189
Sun 12/711:25 p.m.
BOS
-
LIS
Nonstop6h 20m
Delta
Wed 26/812:45 p.m.
LIS
-
BOS
Nonstop7h 30m
Delta
Deal found 2/6C$ 1,190
Wed 19/811:20 p.m.
BOS
-
LIS
Nonstop6h 25m
Virgin Atlantic
Tue 25/812:45 p.m.
LIS
-
BOS
Nonstop7h 30m
Virgin Atlantic
Deal found 1/6C$ 1,192
Thu 23/711:25 p.m.
BOS
-
LIS
Nonstop6h 20m
Delta
Tue 28/712:45 p.m.
LIS
-
BOS
Nonstop7h 25m
Delta
Deal found 1/6C$ 1,193
Wed 4/119:00 p.m.
BOS
-
LIS
1 stop21h 25m
Turkish Airlines
Wed 11/116:00 a.m.
LIS
-
BOS
1 stop17h 05m
Turkish Airlines
Deal found 1/6C$ 1,194
Sat 19/96:55 p.m.
BOS
-
LIS
1 stop11h 10m
United Airlines
Sun 27/91:00 p.m.
LIS
-
BOS
2 stops28h 47m
United Airlines
Deal found 30/5C$ 1,196
Mon 17/81:34 p.m.
BOS
-
LIS
1 stop13h 26m
Delta
Sun 6/912:45 p.m.
LIS
-
BOS
Nonstop7h 35m
Delta
Deal found 2/6C$ 1,197
Sun 12/79:05 a.m.
BOS
-
LIS
1 stop17h 55m
Virgin Atlantic
Tue 21/712:45 p.m.
LIS
-
BOS
Nonstop7h 25m
Virgin Atlantic
Deal found 2/6C$ 1,198
Mon 6/711:25 p.m.
BOS
-
LIS
Nonstop6h 20m
KLM
Tue 14/712:45 p.m.
LIS
-
BOS
Nonstop7h 25m
KLM
Deal found 1/6C$ 1,200
Thu 1/105:50 a.m.
BOS
-
LIS
1 stop22h 30m
United Airlines
Thu 29/106:10 a.m.
LIS
-
BOS
1 stop17h 25m
United Airlines
Deal found 2/6C$ 1,203

Find flight deals from Boston to Lisbon

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Lisbon (LIS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 3 June 2026.

Round-trip from

C$ 1,187

One-way from

C$ 507

Popular in

June

Cheapest in

February

Average price

C$ 1,474
Air Transat
  • Air Transat
  • 14/7-21/7
  • 2 total stops
  • 45h 05m total
  • Boston to Lisbon
Search Deals
LEVEL
  • LEVEL
  • 26/8
  • 1 total stop
  • 16h 40m total
  • Boston to Lisbon
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (C$ 371 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Lisbon that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 3 June 2026.
Use the filters below to find and compare flights from Boston to Lisbon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sun 9/8

6:05 a.m.-9:20 a.m.

2 stops22h 15m

Lisbon Humberto Delgado

Wed 19/8

11:25 a.m.-5:52 p.m.

2 stops35h 27m

C$ 1,187

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Wed 26/8

11:20 p.m.-10:45 a.m.

Nonstop6h 25m

Lisbon Humberto Delgado

Mon 31/8

12:45 p.m.-3:15 p.m.

Nonstop7h 30m

C$ 1,190

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 13/11

9:40 p.m.-9:00 a.m.

Nonstop6h 20m

Lisbon Humberto Delgado

Fri 27/11

11:15 a.m.-1:59 p.m.

Nonstop7h 44m

C$ 1,192

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Wed 30/9

5:45 a.m.-10:30 a.m.

1 stop23h 45m

Lisbon Humberto Delgado

Mon 12/10

1:00 p.m.-9:55 a.m.

1 stop25h 55m

C$ 1,192

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 4/7

6:05 a.m.-8:20 a.m.

1 stop21h 15m

Lisbon Humberto Delgado

Tue 14/7

1:00 p.m.-5:42 p.m.

2 stops33h 42m

C$ 1,193

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Mon 24/8

1:34 p.m.-8:00 a.m.

1 stop13h 26m

Lisbon Humberto Delgado

Sun 30/8

12:45 p.m.-3:15 p.m.

Nonstop7h 30m

C$ 1,197

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 9/10

6:00 a.m.-9:20 a.m.

2 stops22h 20m

Lisbon Humberto Delgado

Sun 25/10

1:00 p.m.-5:25 p.m.

2 stops32h 25m

C$ 1,214
Quickest round-trip

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 18/7

11:25 p.m.-10:45 a.m.

Nonstop6h 20m

Lisbon Humberto Delgado

Sun 26/7

12:45 p.m.-3:10 p.m.

Nonstop7h 25m

C$ 1,225

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Thu 30/7

11:25 p.m.-10:45 a.m.

Nonstop6h 20m

Lisbon Humberto Delgado

Sun 9/8

12:45 p.m.-3:15 p.m.

Nonstop7h 30m

C$ 1,226

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 9/10

11:25 p.m.-10:45 a.m.

Nonstop6h 20m

Lisbon Humberto Delgado

Sun 25/10

11:15 a.m.-2:59 p.m.

Nonstop7h 44m

C$ 1,226

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/6

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Boston to Lisbon

Have a flexible travel schedule? Discover the best time to fly to Lisbon from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to Lisbon

How far ahead should I book a flight from Boston to Lisbon?

The price you pay for your flight from Boston to Lisbon may vary depending on when you book. For the best chance of a lower fare, look to book 84 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Boston to Lisbon?

Currently, February is the cheapest month in which you can book a flight from Boston to Lisbon (average of C$ 848). Flying from Boston to Lisbon in June is currently the most expensive (average of C$ 1,474). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BOS to LIS?

Find hourly flight availability from Boston to Lisbon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 June 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Boston to Lisbon as you normally would.

How much does it cost to fly round-trip from Boston to Lisbon?

Related info for your journey

Find useful and relevant information for your journey from Boston to Lisbon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Boston to Lisbon flight route?

    The Boston Logan Intl to Lisbon Humberto Delgado flight path was viewed by 6 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Boston to Lisbon?

    For as low as C$ 1,192, United Airlines can have you in Lisbon from Boston in 6h 20m. The distance from Boston to Lisbon is about 5121 km. This flight may include one or multiple stops.

  • What are the most reliable airlines from Boston to Lisbon?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Boston to Lisbon on time: JetBlue (85%), TAP AIR PORTUGAL (85%), KLM (83%).

  • Can I find deals for flights from Boston to Lisbon that include hotel bookings?

    Yes. In addition to deals on Boston to Lisbon flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to Lisbon?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Lisbon.

  • Can I find deals for business class flights from Boston to Lisbon?

    Yes. Cheapflights offers flight deals from Boston to Lisbon by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to Lisbon?

    Currently, February is the cheapest month in which you can book a flight from Boston to Lisbon (average of C$ 848). Flying from Boston to Lisbon in June is currently the most expensive (average of C$ 1,474). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Sintra
Fátima
Óbidos
Estoril
Costa da Caparica
Setúbal

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Boston to Lisbon?

Cheapflights makes it easy to find Boston to Lisbon flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Boston to Lisbon?

Cheapflights helps you find that perfect flight to Lisbon from Boston by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Boston to Lisbon with no change fees?

Certainly. Search results for flights to Lisbon from Boston shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Boston to Lisbon become cheaper?

Not ready to book yet? You can track prices for flights from Boston to Lisbon on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.