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Cheap flights from Boston to Lisbon from C$ 428

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 18/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LIS
17 Oct — 24 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Boston Logan Intl to Lisbon Humberto Delgado are usually found in February or January, booked 56 days in advance, depart on a Thursday or Saturday and return on a Monday

Cheap 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 17 September 2025.

Round-trip from

C$ 682

One-way from

C$ 428

Popular in

June

Cheapest in

February

Average price

C$ 1,098
7/11-12/11
  • 7/11-12/11
  • 2 total stops
  • 26h 35m total
  • Boston to Lisbon
Search Deals
United Airlines
  • United Airlines
  • 18/10
  • 2 total stops
  • 35h 50m total
  • Boston to Lisbon
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 206 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 36 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Boston to Lisbon

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 17 September 2025.

Fri 7/115:10 p.m.BOS - LIS
1 stop14h 20mMultiple Airlines
Wed 12/116:40 a.m.LIS - BOS
1 stop12h 15mMultiple Airlines
Deal found 16/9C$ 682
Tue 7/108:05 p.m.BOS - LIS
1 stop12h 35mUnited Airlines
Thu 16/1012:55 p.m.LIS - BOS
2 stops31h 18mUnited Airlines
Deal found 16/9C$ 684
Thu 13/118:59 p.m.BOS - LIS
2 stops54h 56mScandinavian Airlines
Thu 20/118:00 a.m.LIS - BOS
2 stops36h 50mScandinavian Airlines
Deal found 16/9C$ 685
Mon 10/1112:45 p.m.BOS - LIS
2 stops27h 45mScandinavian Airlines
Mon 17/115:20 p.m.LIS - BOS
1 stop27h 30mScandinavian Airlines
Deal found 16/9C$ 686
Tue 14/106:00 a.m.BOS - LIS
1 stop24h 05mUnited Airlines
Thu 23/106:15 a.m.LIS - BOS
1 stop16h 25mUnited Airlines
Deal found 17/9C$ 688
Thu 23/1011:00 p.m.BOS - LIS
1 stop17h 30mLEVEL
Mon 3/119:05 p.m.LIS - BOS
1 stop28h 50mLEVEL
Deal found 16/9C$ 689
Mon 15/124:20 p.m.BOS - LIS
1 stop10h 50mUnited Airlines
Mon 29/1211:20 a.m.LIS - BOS
2 stops16h 28mUnited Airlines
Deal found 17/9C$ 691
Tue 11/116:40 p.m.BOS - LIS
1 stop9h 40mUnited Airlines
Tue 18/116:10 a.m.LIS - BOS
1 stop17h 25mUnited Airlines
Deal found 16/9C$ 692
Tue 7/108:05 p.m.BOS - LIS
1 stop12h 35mMultiple Airlines
Thu 23/105:55 a.m.LIS - BOS
1 stop14h 30mMultiple Airlines
Deal found 17/9C$ 693
Tue 28/1010:35 a.m.BOS - LIS
1 stop18h 45mUnited Airlines
Tue 31/310:25 a.m.LIS - BOS
1 stop12h 00mUnited Airlines
Deal found 16/9C$ 695
Wed 31/127:50 p.m.BOS - LIS
1 stop19h 30mIcelandair
Sun 11/19:20 p.m.LIS - BOS
1 stop25h 30mIcelandair
Deal found 17/9C$ 696
Tue 21/108:00 a.m.BOS - LIS
2 stops20h 20mUnited Airlines
Thu 13/116:10 a.m.LIS - BOS
1 stop17h 25mUnited Airlines
Deal found 17/9C$ 697

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 17 September 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

Mon 26/1

6:00 a.m.-8:10 a.m.

1 stop21h 10m

Lisbon Humberto Delgado

Sun 8/2

10:50 a.m.-12:12 p.m.

1 stop30h 22m

C$ 685

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 27/2

10:30 a.m.-8:10 a.m.

1 stop16h 40m

Lisbon Humberto Delgado

Fri 27/3

12:15 p.m.-9:00 p.m.

1 stop12h 45m

C$ 688

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Tue 11/11

6:40 p.m.-9:20 a.m.

1 stop9h 40m

Lisbon Humberto Delgado

Mon 17/11

6:10 a.m.-6:35 p.m.

1 stop17h 25m

C$ 692

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Thu 12/3

6:35 p.m.-4:05 p.m.

1 stop17h 30m

Lisbon Humberto Delgado

Wed 18/3

4:55 p.m.-4:50 p.m.

1 stop27h 55m

C$ 700

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Tue 10/3

6:35 p.m.-4:05 p.m.

1 stop17h 30m

Lisbon Humberto Delgado

Sun 15/3

4:55 p.m.-4:50 p.m.

1 stop27h 55m

C$ 700

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sun 28/12

5:20 a.m.-10:15 a.m.

1 stop23h 55m

Lisbon Humberto Delgado

Thu 30/4

11:25 a.m.-2:31 p.m.

1 stop32h 06m

C$ 703

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 27/2

5:45 a.m.-9:20 a.m.

2 stops22h 35m

Lisbon Humberto Delgado

Fri 27/3

6:10 a.m.-7:35 p.m.

1 stop17h 25m

C$ 708

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Thu 26/2

11:00 a.m.-3:40 p.m.

2 stops23h 40m

Lisbon Humberto Delgado

Tue 10/3

8:05 a.m.-4:50 p.m.

2 stops60h 45m

C$ 711

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 27/2

5:35 p.m.-8:55 a.m.

1 stop34h 20m

Lisbon Humberto Delgado

Wed 11/3

4:55 p.m.-4:50 p.m.

1 stop27h 55m

C$ 714

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 12/12

6:00 a.m.-8:10 a.m.

1 stop21h 10m

Lisbon Humberto Delgado

Thu 18/12

10:55 a.m.-10:37 p.m.

2 stops16h 42m

C$ 717

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/9

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 September 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 56 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, January 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 July is currently the most expensive (average of C$ 778). 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 17 September 2025.

It’s typically best to fly out from Boston to Lisbon at noon. Doing so could potentially save you 8% on the flight price compared to flying in the morning, which is usually more expensive.

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 17 September 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
7.1
Good
1,977 reviews
Check prices

Overall

7.1

Comfort

7.1

Crew

7.8

Food

6.2

Boarding

7.0

Entertainment

6.3

Reviews

1 / 20
2.0
Mediocre

Claudia,Jul 2025

EWR - LIS

Never made the trip. Had to cancel due to multiple delays
TAP AIR PORTUGAL
7.1
Good
1,977 reviews
TAP AIR PORTUGAL
7.1
Good
1,977 reviews
Check prices

Overall

7.1

Comfort

7.1

Crew

7.8

Food

6.2

Boarding

7.0

Entertainment

6.3

Reviews

1 / 20
2.0
Mediocre

Claudia,Jul 2025

EWR - LIS

Never made the trip. Had to cancel due to multiple delays

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 40m 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 27 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$ 685, United Airlines can have you in Lisbon from Boston in 17h 40m. The distance from Boston to Lisbon is about 5121 km.

  • 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 14% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Boston to Lisbon one-way?

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at C$ 428. TAP AIR PORTUGAL flights start at C$ 509 while deals on LEVEL start at C$ 560 one-way.

  • 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 (71%), TAP AIR PORTUGAL (71%), KLM (68%).

  • 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, January 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 July is currently the most expensive (average of C$ 778). 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
Costa da Caparica
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 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapestC$ 924AverageC$ 1,093FlexibilityNo 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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