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Cheap flights from Boston to Lisbon from C$ 444

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 20/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LIS
11 Aug — 18 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 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 12 July 2026.

Fri 13/116:00 p.m.
BOS
-
LIS
Nonstop6h 35m
TAP AIR PORTUGAL
Tue 17/1111:40 a.m.
LIS
-
BOS
Nonstop8h 00m
TAP AIR PORTUGAL
Deal found 9/7C$ 1,103
Fri 21/85:10 p.m.
BOS
-
LIS
1 stop19h 40m
Delta
Mon 31/812:45 p.m.
LIS
-
BOS
Nonstop7h 30m
Delta
Deal found 10/7C$ 1,104
Wed 19/89:05 a.m.
BOS
-
LIS
2 stops18h 45m
Delta
Tue 25/812:45 p.m.
LIS
-
BOS
Nonstop7h 30m
Delta
Deal found 10/7C$ 1,106
Fri 7/88:25 p.m.
BOS
-
LIS
1 stop17h 20m
Delta
Tue 11/812:45 p.m.
LIS
-
BOS
Nonstop7h 30m
Delta
Deal found 9/7C$ 1,108
Sun 23/86:05 a.m.
BOS
-
LIS
1 stop20h 55m
Delta
Mon 31/811:55 a.m.
LIS
-
BOS
1 stop30h 24m
Delta
Deal found 11/7C$ 1,110
Sun 11/109:20 p.m.
BOS
-
LIS
2 stops15h 30m
Delta
Sat 24/1012:45 p.m.
LIS
-
BOS
Nonstop7h 40m
Delta
Deal found 12/7C$ 1,111
Tue 18/89:45 p.m.
BOS
-
LIS
1 stop12h 10m
Delta
Thu 27/810:00 a.m.
LIS
-
BOS
1 stop11h 13m
Delta
Deal found 10/7C$ 1,113
Thu 20/85:10 p.m.
BOS
-
LIS
1 stop13h 05m
Delta
Mon 31/811:55 a.m.
LIS
-
BOS
1 stop33h 40m
Delta
Deal found 10/7C$ 1,114
Sun 2/811:20 p.m.
BOS
-
LIS
Nonstop6h 25m
Delta
Sat 8/811:55 a.m.
LIS
-
BOS
1 stop33h 42m
Delta
Deal found 12/7C$ 1,115
Tue 18/89:45 p.m.
BOS
-
LIS
1 stop12h 10m
Delta
Sat 29/85:00 a.m.
LIS
-
BOS
1 stop13h 18m
Delta
Deal found 10/7C$ 1,120
Tue 25/812:00 p.m.
BOS
-
LIS
2 stops15h 50m
Delta
Tue 27/1011:30 a.m.
LIS
-
BOS
1 stop30h 55m
Delta
Deal found 10/7C$ 1,121

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 12 July 2026.

Round-trip from

C$ 1,103

One-way from

C$ 444

Popular in

June

Cheapest in

February

Average price

C$ 1,508
Delta
  • Delta
  • 18/8-1/9
  • 2 total stops
  • 25h 05m total
  • Boston to Lisbon
Search Deals
20/8
  • 20/8
  • 2 total stops
  • 19h 25m total
  • Boston to Lisbon
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (C$ 419 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 12 July 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 2/8

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

Nonstop6h 25m

Lisbon Humberto Delgado

Fri 14/8

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

1 stop13h 18m

C$ 1,114

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 13/11

10:10 p.m.-9:45 a.m.

Nonstop6h 35m

Lisbon Humberto Delgado

Tue 17/11

4:00 p.m.-8:45 p.m.

1 stop9h 45m

C$ 1,118

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Tue 4/8

5:10 p.m.-8:50 a.m.

1 stop10h 40m

Lisbon Humberto Delgado

Thu 13/8

10:00 a.m.-4:13 p.m.

1 stop11h 13m

C$ 1,139

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 25/7

9:45 p.m.-2:55 p.m.

1 stop12h 10m

Lisbon Humberto Delgado

Tue 4/8

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

1 stop16h 37m

C$ 1,141

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Tue 4/8

5:10 p.m.-8:50 a.m.

1 stop10h 40m

Lisbon Humberto Delgado

Wed 12/8

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

1 stop13h 18m

C$ 1,141
Quickest round-trip

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Thu 13/8

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

Nonstop6h 25m

Lisbon Humberto Delgado

Sun 23/8

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

Nonstop7h 30m

C$ 1,142

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Tue 11/8

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

Nonstop6h 25m

Lisbon Humberto Delgado

Sun 23/8

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

Nonstop7h 30m

C$ 1,142

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Wed 7/10

9:45 p.m.-2:55 p.m.

1 stop12h 10m

Lisbon Humberto Delgado

Fri 13/11

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

Nonstop7h 44m

C$ 1,145

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sun 2/8

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

Nonstop6h 25m

Lisbon Humberto Delgado

Sun 16/8

12:15 p.m.-7:35 p.m.

1 stop12h 20m

C$ 1,159

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Wed 23/12

7:40 p.m.-9:20 a.m.

1 stop32h 40m

Lisbon Humberto Delgado

Sun 27/12

10:50 a.m.-5:42 p.m.

2 stops35h 52m

C$ 1,224

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/7

Showing 1-10 of 22 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$ 890). Flying from Boston to Lisbon in June is currently the most expensive (average of C$ 1,542). 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 12 July 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$ 1,103, TAP AIR PORTUGAL can have you in Lisbon from Boston in 6h 35m. 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 (82%), TAP AIR PORTUGAL (82%), Emirates (78%).

  • 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$ 890). Flying from Boston to Lisbon in June is currently the most expensive (average of C$ 1,542). 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
Fátima
Sintra
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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