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Cheap flights from Boston to Lisbon from £228

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 17/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LIS
18 Oct — 25 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 Saturday or Tuesday and return on a Thursday

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 18 September 2025.

Round-trip from

£363

One-way from

£228

Popular in

June

Cheapest in

February

Average price

£585

Good round-trip deal

£639 or less
United Airlines
  • United Airlines
  • 14/12-27/12
  • 2 total stops
  • 37h 07m total
  • Boston to Lisbon
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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 (£58 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Boston Logan Intl to Lisbon Humberto Delgado.
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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 18 September 2025.

Sun 14/1205:30BOS - LIS
1 stop23h 45mUnited Airlines
Sat 27/1211:20LIS - BOS
1 stop13h 22mUnited Airlines
Deal found 17/9£363
Tue 7/1020:05BOS - LIS
1 stop12h 35mUnited Airlines
Thu 16/1012:55LIS - BOS
2 stops31h 18mUnited Airlines
Deal found 16/9£364
Thu 13/1120:59BOS - LIS
2 stops54h 56mScandinavian Airlines
Thu 20/1108:00LIS - BOS
2 stops36h 50mScandinavian Airlines
Deal found 16/9£365
Mon 10/1109:59BOS - LIS
2 stops30h 31mScandinavian Airlines
Mon 17/1117:20LIS - BOS
1 stop27h 30mScandinavian Airlines
Deal found 16/9£366
Tue 14/1006:00BOS - LIS
1 stop24h 05mUnited Airlines
Fri 24/1006:15LIS - BOS
1 stop16h 25mUnited Airlines
Deal found 17/9£366
Thu 23/1023:00BOS - LIS
1 stop17h 30mLEVEL
Mon 3/1121:05LIS - BOS
1 stop28h 50mLEVEL
Deal found 16/9£367
Mon 15/1216:20BOS - LIS
1 stop10h 50mUnited Airlines
Mon 29/1211:20LIS - BOS
2 stops16h 28mUnited Airlines
Deal found 17/9£368
Tue 11/1118:40BOS - LIS
1 stop9h 40mUnited Airlines
Tue 18/1106:10LIS - BOS
1 stop17h 25mUnited Airlines
Deal found 16/9£369
Tue 7/1020:05BOS - LIS
1 stop12h 35mMultiple Airlines
Thu 23/1005:55LIS - BOS
1 stop14h 30mMultiple Airlines
Deal found 17/9£369
Tue 28/1018:40BOS - LIS
1 stop10h 40mUnited Airlines
Tue 31/310:25LIS - BOS
2 stops18h 29mUnited Airlines
Deal found 16/9£370
Wed 31/1219:50BOS - LIS
1 stop19h 30mIcelandair
Sun 11/121:20LIS - BOS
1 stop25h 30mIcelandair
Deal found 17/9£371
Tue 21/1012:10BOS - LIS
2 stops16h 10mUnited Airlines
Fri 7/1106:10LIS - BOS
1 stop17h 25mUnited Airlines
Deal found 17/9£371

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 18 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

Thu 4/12

05:30-10:15

1 stop23h 45m

Lisbon Humberto Delgado

Wed 10/12

11:00-12:12

1 stop30h 12m

£365

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 20/2

20:45-16:05

2 stops38h 20m

Lisbon Humberto Delgado

Mon 2/3

06:45-12:12

2 stops34h 27m

£366

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Tue 14/10

06:00-11:05

1 stop24h 05m

Lisbon Humberto Delgado

Fri 24/10

06:15-17:40

1 stop16h 25m

£366

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Tue 10/3

18:35-16:05

1 stop17h 30m

Lisbon Humberto Delgado

Sun 15/3

16:55-16:50

1 stop27h 55m

£373

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 3/1

20:40-23:30

1 stop21h 50m

Lisbon Humberto Delgado

Sat 14/2

11:20-13:13

2 stops30h 53m

£373

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sun 28/12

05:20-10:15

1 stop23h 55m

Lisbon Humberto Delgado

Thu 30/4

11:25-14:31

1 stop32h 06m

£374

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Mon 10/11

20:40-13:20

1 stop11h 40m

Lisbon Humberto Delgado

Mon 17/11

11:20-12:28

2 stops30h 08m

£377

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 9/1

13:30-09:20

2 stops14h 50m

Lisbon Humberto Delgado

Mon 12/1

10:15-18:57

2 stops13h 42m

£384

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 17/10

06:00-11:05

1 stop24h 05m

Lisbon Humberto Delgado

Thu 23/10

06:15-17:40

1 stop16h 25m

£387

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 8/11

05:30-08:10

2 stops21h 40m

Lisbon Humberto Delgado

Mon 17/11

11:20-12:28

2 stops30h 08m

£388

Flights are sorted by cheapest return 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 return 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 return flight from Boston to Lisbon. Price data was last updated on 12 September 2025.

The best time to book flights from Boston to Lisbon is 56 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 £101). Flying from Boston to Lisbon in August is currently the most expensive (average of £274). 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 18 September 2025.

It’s typically best to fly out from Boston to Lisbon at midday. Doing so could potentially save you 16% on the flight price compared to flying in the morning, which is usually more expensive.

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?

    Within the past month, 7 users have taken a look at flights from Boston Logan Intl to Lisbon Humberto Delgado.

  • How long is the flight from Boston to Lisbon?

    There are many flights that can get you from Boston to Lisbon in 17h 30m. Fly via United Airlines or Scandinavian Airlines to get the fastest option. There are 3182 mi between Boston and Lisbon. This flight may include one or multiple stops.

  • What are the most reliable airlines from Boston to Lisbon?

    Consider JetBlue (71%), TAP AIR PORTUGAL (71%) or KLM (68%) when booking your flight. These represent the most reliable airlines when flying from Boston to Lisbon.

  • What are the cheapest flights from Boston to Lisbon?

    While on average a flight from Boston to Lisbon is generally £743, our data shows the cheapest flight currently is £551. When looking at the most popular route, (Boston Logan Intl - Lisbon Humberto Delgado), you can expect to pay £693 for that flight.

  • 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 holiday 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 £101). Flying from Boston to Lisbon in August is currently the most expensive (average of £274). 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
Madeira
Setúbal
Oeiras
Fátima
Almada
Estoril
Beja
Sintra
Costa da Caparica
Óbidos
Nazaré
Sesimbra
Peniche

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