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Cheap flights from Boston to Lisbon from C$ 548

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 25/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LIS
25 Jul — 1 Aug1
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 15 days in advance, depart on a Thursday or Wednesday 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 25 June 2026.

Thu 17/96:55 p.m.
BOS
-
LIS
1 stop11h 10m
United Airlines
Mon 28/91:00 p.m.
LIS
-
BOS
2 stops27h 24m
United Airlines
Deal found 23/6C$ 1,226
Sat 18/711:25 p.m.
BOS
-
LIS
Nonstop6h 20m
Virgin Atlantic
Sat 25/712:45 p.m.
LIS
-
BOS
Nonstop7h 25m
Virgin Atlantic
Deal found 24/6C$ 1,228
Fri 4/99:50 p.m.
BOS
-
LIS
1 stop12h 45m
British Airways
Wed 9/911:00 a.m.
LIS
-
BOS
1 stop14h 05m
British Airways
Deal found 23/6C$ 1,229
Mon 13/711:25 p.m.
BOS
-
LIS
Nonstop6h 20m
Delta
Fri 24/712:45 p.m.
LIS
-
BOS
Nonstop7h 25m
Delta
Deal found 23/6C$ 1,231
Thu 15/1011:25 p.m.
BOS
-
LIS
Nonstop6h 20m
Delta
Sat 24/1012:45 p.m.
LIS
-
BOS
Nonstop7h 40m
Delta
Deal found 23/6C$ 1,232
Sun 16/82:28 p.m.
BOS
-
LIS
1 stop15h 02m
United Airlines
Mon 31/811:25 a.m.
LIS
-
BOS
1 stop15h 02m
United Airlines
Deal found 23/6C$ 1,233
Tue 29/96:50 p.m.
BOS
-
LIS
1 stop9h 30m
United Airlines
Sun 11/106:15 a.m.
LIS
-
BOS
1 stop16h 25m
United Airlines
Deal found 23/6C$ 1,235
Mon 13/75:05 p.m.
BOS
-
LIS
1 stop9h 55m
Delta
Thu 13/812:45 p.m.
LIS
-
BOS
Nonstop7h 30m
Delta
Deal found 24/6C$ 1,236
Thu 30/75:45 a.m.
BOS
-
LIS
1 stop22h 35m
United Airlines
Fri 7/86:15 a.m.
LIS
-
BOS
1 stop16h 25m
United Airlines
Deal found 22/6C$ 1,238
Mon 28/911:25 p.m.
BOS
-
LIS
Nonstop6h 20m
Delta
Tue 13/1012:45 p.m.
LIS
-
BOS
Nonstop7h 40m
Delta
Deal found 23/6C$ 1,239
Sat 17/103:48 p.m.
BOS
-
LIS
1 stop11h 32m
United Airlines
Sun 25/101:00 p.m.
LIS
-
BOS
1 stop13h 37m
United Airlines
Deal found 22/6C$ 1,241
Fri 18/96:00 a.m.
BOS
-
LIS
1 stop24h 05m
United Airlines
Sun 27/96:15 a.m.
LIS
-
BOS
1 stop16h 25m
United Airlines
Deal found 23/6C$ 1,242

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 25 June 2026.

Round-trip from

C$ 1,226

One-way from

C$ 548

Popular in

June

Cheapest in

February

Average price

C$ 1,556
United Airlines
  • United Airlines
  • 17/9-25/9
  • 3 total stops
  • 38h 34m total
  • Boston to Lisbon
Search Deals
25/7
  • 25/7
  • 1 total stop
  • 10h 35m total
  • Boston to Lisbon
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (C$ 420 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 50 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 25 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

Fri 11/9

7:40 p.m.-3:35 p.m.

1 stop14h 55m

Lisbon Humberto Delgado

Sun 27/9

7:20 a.m.-5:00 p.m.

1 stop14h 40m

C$ 1,229

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Thu 3/9

7:40 p.m.-6:10 p.m.

1 stop17h 30m

Lisbon Humberto Delgado

Tue 8/9

7:10 a.m.-5:00 p.m.

1 stop14h 50m

C$ 1,229
Quickest round-trip

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Thu 23/7

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

Nonstop6h 20m

Lisbon Humberto Delgado

Sun 2/8

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

Nonstop7h 30m

C$ 1,231

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Tue 25/8

3:35 p.m.-9:20 a.m.

1 stop12h 45m

Lisbon Humberto Delgado

Sun 6/9

6:15 a.m.-5:40 p.m.

1 stop16h 25m

C$ 1,238

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Tue 8/9

1:32 p.m.-8:00 a.m.

1 stop13h 28m

Lisbon Humberto Delgado

Wed 30/9

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

Nonstop7h 35m

C$ 1,238

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 12/9

7:23 p.m.-8:20 a.m.

2 stops31h 57m

Lisbon Humberto Delgado

Sat 26/9

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

2 stops33h 42m

C$ 1,239

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 14/8

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

Nonstop6h 25m

Lisbon Humberto Delgado

Sat 22/8

5:00 a.m.-1:18 p.m.

1 stop13h 18m

C$ 1,246

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 24/7

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

Nonstop6h 20m

Lisbon Humberto Delgado

Mon 17/8

5:00 a.m.-4:37 p.m.

1 stop16h 37m

C$ 1,246

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Wed 9/9

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

Nonstop6h 20m

Lisbon Humberto Delgado

Wed 16/9

5:35 a.m.-1:39 p.m.

1 stop13h 04m

C$ 1,248

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Mon 6/7

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

1 stop21h 15m

Lisbon Humberto Delgado

Mon 13/7

11:25 a.m.-2:41 p.m.

1 stop32h 16m

C$ 1,252

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/6

Showing 1-10 of 23 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 14 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$ 879). Flying from Boston to Lisbon in June is currently the most expensive (average of C$ 1,556). 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 25 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$ 1,231, British Airways 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 (83%), TAP AIR PORTUGAL (83%), KLM (82%).

  • 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$ 879). Flying from Boston to Lisbon in June is currently the most expensive (average of C$ 1,556). 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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