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Cheap flights from Boston to Lisbon from C$ 555

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 13/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LIS
18 Jun — 25 Jun1
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 19 May 2026.

Mon 15/610:05 a.m.
BOS
-
LIS
1 stop18h 30m
Air Transat
Wed 8/78:15 a.m.
LIS
-
BOS
1 stop17h 40m
Air Transat
Deal found 16/5C$ 1,141
Mon 1/610:05 a.m.
BOS
-
LIS
1 stop18h 30m
Air Transat
Thu 4/68:15 a.m.
LIS
-
BOS
1 stop17h 40m
Air Transat
Deal found 14/5C$ 1,142
Mon 31/810:05 a.m.
BOS
-
LIS
1 stop18h 30m
Air Transat
Thu 26/119:00 a.m.
LIS
-
BOS
1 stop13h 25m
Air Transat
Deal found 17/5C$ 1,148
Thu 2/710:05 a.m.
BOS
-
LIS
1 stop18h 30m
Air Transat
Sun 26/711:35 a.m.
LIS
-
BOS
1 stop26h 30m
Air Transat
Deal found 14/5C$ 1,149
Thu 3/910:55 p.m.
BOS
-
LIS
1 stop28h 35m
LEVEL
Sat 12/97:20 p.m.
LIS
-
BOS
1 stop31h 25m
LEVEL
Deal found 16/5C$ 1,150
Sat 18/711:25 p.m.
BOS
-
LIS
Nonstop6h 20m
KLM
Sun 30/812:45 p.m.
LIS
-
BOS
Nonstop7h 30m
KLM
Deal found 17/5C$ 1,171
Thu 1/106:50 p.m.
BOS
-
LIS
1 stop9h 30m
United Airlines
Mon 5/1011:25 a.m.
LIS
-
BOS
2 stops28h 53m
United Airlines
Deal found 19/5C$ 1,174
Wed 28/106:00 a.m.
BOS
-
LIS
1 stop22h 10m
United Airlines
Tue 3/1111:20 a.m.
LIS
-
BOS
1 stop32h 17m
United Airlines
Deal found 19/5C$ 1,177
Wed 4/116:00 a.m.
BOS
-
LIS
1 stop21h 10m
United Airlines
Sat 21/1111:20 a.m.
LIS
-
BOS
1 stop32h 17m
United Airlines
Deal found 17/5C$ 1,178
Tue 16/66:35 p.m.
BOS
-
LIS
1 stop31h 45m
Air Transat
Thu 16/78:15 a.m.
LIS
-
BOS
1 stop17h 40m
Air Transat
Deal found 18/5C$ 1,179
Sun 12/710:05 a.m.
BOS
-
LIS
1 stop18h 30m
Air Transat
Wed 22/78:15 a.m.
LIS
-
BOS
1 stop17h 40m
Air Transat
Deal found 14/5C$ 1,181

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 19 May 2026.

Round-trip from

C$ 1,141

One-way from

C$ 555

Popular in

June

Cheapest in

February

Average price

C$ 1,291
Air Transat
  • Air Transat
  • 15/6-2/7
  • 2 total stops
  • 36h 10m total
  • Boston to Lisbon
Search Deals
Delta
  • Delta
  • 13/7
  • Nonstop
  • 6h 20m total
  • Boston to Lisbon
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (C$ 347 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 19 May 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

Fri 4/9

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

Nonstop6h 20m

Lisbon Humberto Delgado

Mon 14/9

12:45 p.m.-3:20 p.m.

Nonstop7h 35m

C$ 1,183

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 14/8

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$ 1,183

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Thu 10/9

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

Nonstop6h 20m

Lisbon Humberto Delgado

Fri 18/9

12:45 p.m.-3:20 p.m.

Nonstop7h 35m

C$ 1,183

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Wed 12/8

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

Nonstop6h 25m

Lisbon Humberto Delgado

Wed 9/9

12:45 p.m.-3:20 p.m.

Nonstop7h 35m

C$ 1,183

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Tue 28/7

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

Nonstop6h 20m

Lisbon Humberto Delgado

Mon 10/8

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

Nonstop7h 30m

C$ 1,218
Quickest round-trip

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 6/6

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

Nonstop6h 20m

Lisbon Humberto Delgado

Sat 13/6

12:45 p.m.-3:14 p.m.

Nonstop7h 29m

C$ 1,218

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 4/9

7:00 p.m.-8:20 a.m.

1 stop32h 20m

Lisbon Humberto Delgado

Fri 18/9

11:25 a.m.-9:50 a.m.

1 stop27h 25m

C$ 1,219

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Wed 5/8

6:50 p.m.-9:20 a.m.

1 stop9h 30m

Lisbon Humberto Delgado

Sat 15/8

11:25 a.m.-6:07 p.m.

1 stop11h 42m

C$ 1,232

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 4/9

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

Nonstop6h 20m

Lisbon Humberto Delgado

Fri 18/9

10:00 a.m.-6:29 p.m.

1 stop13h 29m

C$ 1,238

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 4/9

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

Nonstop6h 20m

Lisbon Humberto Delgado

Fri 18/9

10:00 a.m.-10:36 p.m.

1 stop17h 36m

C$ 1,238

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/5

Showing 1-10 of 21 resultsSorted by cheapest first
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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$ 841). Flying from Boston to Lisbon in June is currently the most expensive (average of C$ 1,467). 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 19 May 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$ 1,183, KLM can have you in Lisbon from Boston in 6h 20m. The distance from Boston to Lisbon is about 5121 km. All flights are typically direct.

  • 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 (88%), TAP AIR PORTUGAL (88%), Emirates (85%).

  • 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$ 841). Flying from Boston to Lisbon in June is currently the most expensive (average of C$ 1,467). 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

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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.

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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.

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