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Cheap flights from Boston to Lisbon from C$ 432

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LIS
15 Jan — 22 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Boston Logan Intl to Lisbon Humberto Delgado are usually found in November or February, booked 58 days in advance, depart on a Wednesday 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 16 December 2025.

Wed 31/129:35 p.m.BOS - LIS
1 stop12h 15mBritish Airways
Wed 7/16:35 p.m.LIS - BOS
1 stop32h 20mBritish Airways
Deal found 15/12C$ 938
Tue 30/125:30 a.m.BOS - LIS
1 stop22h 50mUnited Airlines
Tue 20/111:20 a.m.LIS - BOS
2 stops31h 57mUnited Airlines
Deal found 16/12C$ 943
Wed 31/122:15 p.m.BOS - LIS
1 stop15h 00mUnited Airlines
Tue 20/111:20 a.m.LIS - BOS
2 stops31h 57mUnited Airlines
Deal found 16/12C$ 945
Tue 30/125:30 a.m.BOS - LIS
1 stop22h 50mUnited Airlines
Tue 13/111:20 a.m.LIS - BOS
2 stops30h 53mUnited Airlines
Deal found 15/12C$ 956
Wed 31/122:15 p.m.BOS - LIS
1 stop15h 00mUnited Airlines
Tue 13/111:20 a.m.LIS - BOS
2 stops30h 53mUnited Airlines
Deal found 15/12C$ 959
Tue 30/128:35 p.m.BOS - LIS
Nonstop6h 25mDelta
Tue 13/110:00 a.m.LIS - BOS
1 stop17h 22mDelta
Deal found 15/12C$ 966
Mon 29/128:35 p.m.BOS - LIS
Nonstop6h 25mDelta
Mon 12/111:25 a.m.LIS - BOS
1 stop31h 05mDelta
Deal found 15/12C$ 969
Wed 31/127:44 p.m.BOS - LIS
1 stop9h 31mUnited Airlines
Mon 12/110:15 a.m.LIS - BOS
1 stop11h 59mUnited Airlines
Deal found 15/12C$ 974
Tue 30/125:30 a.m.BOS - LIS
1 stop22h 50mUnited Airlines
Mon 12/110:15 a.m.LIS - BOS
2 stops16h 23mUnited Airlines
Deal found 15/12C$ 978

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 16 December 2025.

Round-trip from

C$ 705

One-way from

C$ 432

Popular in

June

Cheapest in

November

Average price

C$ 1,196
Delta
  • Delta
  • 23/1-2/2
  • 2 total stops
  • 44h 27m total
  • Boston to Lisbon
Search Deals
LEVEL
  • LEVEL
  • 6/5
  • 1 total stop
  • 17h 40m total
  • Boston to Lisbon
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 224 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 16 December 2025.
Use the filters below to find and compare flights from Boston to Lisbon that are best for you.

Fly from

Boston

Fly to

Lisbon

Route

Depart

Return

Price

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 20/2

10:30 a.m.-9:20 a.m.

2 stops17h 50m

Lisbon Humberto Delgado

Sat 7/3

5:00 a.m.-1:10 p.m.

1 stop13h 10m

C$ 711

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 21/2

5:30 a.m.-8:55 a.m.

1 stop22h 25m

Lisbon Humberto Delgado

Sat 7/3

5:00 a.m.-11:57 p.m.

2 stops23h 57m

C$ 714

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 31/1

8:40 p.m.-1:20 p.m.

1 stop11h 40m

Lisbon Humberto Delgado

Sat 7/2

11:20 a.m.-7:42 p.m.

1 stop13h 22m

C$ 714

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Thu 19/3

9:30 p.m.-5:30 p.m.

1 stop16h 00m

Lisbon Humberto Delgado

Tue 24/3

4:50 p.m.-2:20 p.m.

1 stop25h 30m

C$ 720

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Thu 19/3

9:30 p.m.-5:30 p.m.

1 stop16h 00m

Lisbon Humberto Delgado

Sun 22/3

11:25 a.m.-7:15 a.m.

2 stops23h 50m

C$ 733

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Wed 18/3

9:50 p.m.-2:35 p.m.

1 stop12h 45m

Lisbon Humberto Delgado

Thu 26/3

10:00 a.m.-6:27 p.m.

1 stop12h 27m

C$ 735

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Thu 19/3

8:59 p.m.-5:30 p.m.

2 stops16h 31m

Lisbon Humberto Delgado

Tue 24/3

5:00 a.m.-10:54 p.m.

2 stops21h 54m

C$ 740

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Mon 4/5

10:50 p.m.-8:35 p.m.

1 stop16h 45m

Lisbon Humberto Delgado

Mon 11/5

10:10 p.m.-9:05 p.m.

1 stop27h 55m

C$ 749

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Wed 18/3

9:50 p.m.-2:35 p.m.

1 stop12h 45m

Lisbon Humberto Delgado

Sun 22/3

11:25 a.m.-7:15 a.m.

2 stops23h 50m

C$ 751

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sun 22/2

5:35 p.m.-10:00 p.m.

2 stops47h 25m

Lisbon Humberto Delgado

Sun 1/3

6:00 p.m.-3:50 p.m.

1 stop26h 50m

C$ 775

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/12

Showing 1-10 of 22 results
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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?

Use this chart to determine the optimal time to book a round-trip flight from Boston to Lisbon. Price data was last updated on 12 December 2025.

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 58 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$ 482). Flying from Boston to Lisbon in June is currently the most expensive (average of C$ 817). 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 16 December 2025.

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?

Reviews of airlines servicing Lisbon

Get insights into the airlines that provide service to Lisbon. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Lisbon. Reviews last updated 16 December 2025.
Get a feel of what it's like to fly with TAP AIR PORTUGAL from Boston to Lisbon by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
TAP AIR PORTUGAL
7.2
Good
2,091 reviews
Check prices

Crew

7.8

Entertainment

6.3

Comfort

7.1

Food

6.2

Overall

7.2

Boarding

7.0

Reviews

1 / 20
8.0
Excellent

Michael,Dec 2025

FNC - LIS

Long wait standing after checking in at the gate Limited juice selection.
TAP AIR PORTUGAL
7.2
Good
2,091 reviews
TAP AIR PORTUGAL
7.2
Good
2,091 reviews
Check prices

Crew

7.8

Entertainment

6.3

Comfort

7.1

Food

6.2

Overall

7.2

Boarding

7.0

Reviews

1 / 20
8.0
Excellent

Michael,Dec 2025

FNC - LIS

Long wait standing after checking in at the gate Limited juice selection.

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.

  • What airports do I use to fly from Boston to Lisbon?

    Booking a flight from Boston Logan Intl (BOS) to Lisbon Humberto Delgado (LIS) is your only option if you wish to fly from Boston to Lisbon. On a typical day, there are 6 flights from Logan Intl to Humberto Delgado, all of which are around 6h 30m for a nonstop flight. You can also purchase a plane ticket from 1 airline when you book a flight from Logan Intl to Lisbon.

  • How popular is this Boston to Lisbon flight route?

    The Boston Logan Intl to Lisbon Humberto Delgado flight path was viewed by 21 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$ 733, United Airlines can have you in Lisbon from Boston in 16h. The distance from Boston to Lisbon is about 5121 km. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Boston to Lisbon round-trip?

    TAP AIR PORTUGAL, at C$ 924, was found to be the cheapest airline from Boston to Lisbon.. TAP AIR PORTUGAL is currently priced 13% below the average price you’ll pay for this route.

  • 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 (80%).

  • 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$ 482). Flying from Boston to Lisbon in June is currently the most expensive (average of C$ 817). 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
Costa da Caparica
Fátima
Sintra
Óbidos
Setúbal

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Boston to Lisbon

Discover the top airline that operate flights from Boston to Lisbon. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 16 December 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapestC$ 924AverageC$ 1,092FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights

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.

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