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Cheap flights from Boston to Lisbon from £234

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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LIS
14 Dec — 21 Dec1
1 adult
1 adult, Economy, 0 bags

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

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 14 November 2025.

Round-trip from

£373

One-way from

£234

Popular in

June

Cheapest in

January

Average price

£520

Good one-way deal

£159 or less
Delta
  • Delta
  • 9/12-23/12
  • Nonstop
  • 14h 10m total
  • Boston to Lisbon
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LEVEL
  • LEVEL
  • 11/12
  • 1 total stop
  • 28h 50m total
  • Boston to Lisbon
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£67 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
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Average for round-trip flights in November 2025
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Price to beat on a one-way flight from Boston Logan Intl to Lisbon Humberto Delgado.
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Find 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 14 November 2025.

Tue 9/1220:35BOS - LIS
Nonstop6h 25mDelta
Tue 23/1211:15LIS - BOS
Nonstop7h 45mDelta
Deal found 11/11£373
Thu 11/1215:35BOS - LIS
1 stop12h 30mMultiple Airlines
Thu 18/1212:30LIS - BOS
1 stop12h 20mMultiple Airlines
Deal found 12/11£375
Tue 9/1217:00BOS - LIS
1 stop11h 00mMultiple Airlines
Tue 23/1211:15LIS - BOS
Nonstop7h 45mMultiple Airlines
Deal found 11/11£377
Wed 31/1220:35BOS - LIS
Nonstop6h 25mDelta
Fri 16/110:00LIS - BOS
1 stop13h 30mDelta
Deal found 12/11£381
Tue 9/1217:00BOS - LIS
1 stop11h 00mDelta
Thu 25/1210:00LIS - BOS
1 stop12h 15mDelta
Deal found 11/11£385
Fri 12/1206:00BOS - LIS
1 stop22h 00mDelta
Thu 15/110:00LIS - BOS
1 stop17h 22mDelta
Deal found 11/11£388
Tue 30/1220:35BOS - LIS
Nonstop6h 25mDelta
Tue 13/105:30LIS - BOS
2 stops18h 00mDelta
Deal found 12/11£389
Wed 31/1217:00BOS - LIS
1 stop10h 40mDelta
Sat 17/105:30LIS - BOS
2 stops17h 57mDelta
Deal found 11/11£393
Fri 12/1206:00BOS - LIS
1 stop22h 00mDelta
Sat 17/105:30LIS - BOS
2 stops18h 00mDelta
Deal found 11/11£397
Wed 10/1221:35BOS - LIS
1 stop12h 15mBritish Airways
Tue 16/1210:35LIS - BOS
1 stop14h 10mBritish Airways
Deal found 12/11£421

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 14 November 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

15:43-07:55

1 stop11h 12m

Lisbon Humberto Delgado

Sat 28/2

06:30-19:50

1 stop18h 20m

£375

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 16/1

17:45-08:50

1 stop10h 05m

Lisbon Humberto Delgado

Wed 21/1

06:30-15:15

1 stop13h 45m

£375

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Tue 3/2

17:05-08:00

1 stop9h 55m

Lisbon Humberto Delgado

Tue 24/2

10:00-18:24

1 stop13h 24m

£385

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Thu 11/12

15:35-09:05

1 stop12h 30m

Lisbon Humberto Delgado

Sun 14/12

11:05-17:25

1 stop11h 20m

£385

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sun 18/1

17:05-08:00

1 stop9h 55m

Lisbon Humberto Delgado

Sun 25/1

05:30-18:30

2 stops18h 00m

£393

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 31/1

13:00-11:20

2 stops17h 20m

Lisbon Humberto Delgado

Fri 20/2

05:30-13:40

1 stop13h 10m

£399

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Tue 30/12

21:35-21:45

1 stop19h 10m

Lisbon Humberto Delgado

Tue 13/1

07:05-14:20

1 stop12h 15m

£421

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 11/4

22:50-08:30

1 stop28h 40m

Lisbon Humberto Delgado

Sun 19/4

17:45-21:05

1 stop32h 20m

£435

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 16/1

13:00-11:20

2 stops17h 20m

Lisbon Humberto Delgado

Mon 19/1

11:25-01:04

2 stops18h 39m

£484

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Thu 11/12

22:40-08:30

1 stop28h 50m

£234

Flights are sorted by cheapest return flights first.

Deals found on 12/11

Showing 1-10 of 18 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 7 November 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, February is the cheapest month in which you can book a flight from Boston to Lisbon (average of £258). Flying from Boston to Lisbon in June is currently the most expensive (average of £451). 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 14 November 2025.

When flying from Boston to Lisbon, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 9h 55m. Fly via Delta or British Airways 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 (82%), TAP AIR PORTUGAL (82%) or Emirates (78%) 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 £233, our data shows the cheapest flight currently is £143. When looking at the most popular route, (Boston Logan Intl - Lisbon Humberto Delgado), you can expect to pay £719 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, February is the cheapest month in which you can book a flight from Boston to Lisbon (average of £258). Flying from Boston to Lisbon in June is currently the most expensive (average of £451). 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
Estoril
Almada
Beja
Sintra
Costa da Caparica
Óbidos
Nazaré
Sesimbra
Peniche

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