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Cheap flights from Boston to Lisbon from £302

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 14/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LIS
18 Jun — 25 Jun1
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 85 days in advance, depart on a Saturday or Thursday and return on a Tuesday

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 19 May 2026.

Tue 16/615:25
BOS
-
LIS
3 stops25h 20m
Multiple Airlines
Fri 26/611:35
LIS
-
BOS
2 stops14h 20m
Multiple Airlines
Deal found 16/5£617
Mon 15/610:05
BOS
-
LIS
1 stop18h 30m
Air Transat
Wed 8/708:15
LIS
-
BOS
1 stop17h 40m
Air Transat
Deal found 16/5£620
Mon 1/610:05
BOS
-
LIS
1 stop18h 30m
Air Transat
Mon 8/608:15
LIS
-
BOS
1 stop17h 40m
Air Transat
Deal found 14/5£621
Mon 31/810:05
BOS
-
LIS
1 stop18h 30m
Air Transat
Sun 29/1108:35
LIS
-
BOS
1 stop13h 50m
Air Transat
Deal found 17/5£624
Thu 2/710:05
BOS
-
LIS
1 stop18h 30m
Air Transat
Sun 26/711:35
LIS
-
BOS
1 stop26h 30m
Air Transat
Deal found 14/5£625
Thu 3/922:55
BOS
-
LIS
1 stop28h 35m
LEVEL
Sat 12/919:20
LIS
-
BOS
1 stop31h 25m
LEVEL
Deal found 16/5£626
Tue 16/623:25
BOS
-
LIS
Nonstop6h 20m
Virgin Atlantic
Fri 26/612:45
LIS
-
BOS
Nonstop7h 29m
Virgin Atlantic
Deal found 16/5£635
Thu 6/823:35
BOS
-
LIS
1 stop16h 55m
LEVEL
Tue 11/821:15
LIS
-
BOS
1 stop28h 50m
LEVEL
Deal found 14/5£636
Wed 4/1106:00
BOS
-
LIS
1 stop21h 10m
United Airlines
Sat 21/1111:20
LIS
-
BOS
1 stop32h 17m
United Airlines
Deal found 17/5£641
Tue 16/618:35
BOS
-
LIS
1 stop31h 45m
Air Transat
Thu 16/708:15
LIS
-
BOS
1 stop17h 40m
Air Transat
Deal found 18/5£641

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 19 May 2026.

Round-trip from

£617

One-way from

£302

Popular in

June

Cheapest in

February

Average price

£702
16/6-26/6
  • 16/6-26/6
  • 5 total stops
  • 39h 40m total
  • Boston to Lisbon
Search Deals
Delta
  • Delta
  • 14/7
  • Nonstop
  • 6h 20m total
  • Boston to Lisbon
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£102 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

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 19 May 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 return flight

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 18/7

23:25-10:45

Nonstop6h 20m

Lisbon Humberto Delgado

Sun 30/8

12:45-15:15

Nonstop7h 30m

£637

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 29/8

23:20-10:45

Nonstop6h 25m

Lisbon Humberto Delgado

Sat 31/10

11:15-14:59

Nonstop7h 44m

£644

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Tue 25/8

11:00-08:00

1 stop16h 00m

Lisbon Humberto Delgado

Tue 3/11

11:15-13:59

Nonstop7h 44m

£647
Fastest return journey

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Mon 6/7

23:25-10:45

Nonstop6h 20m

Lisbon Humberto Delgado

Wed 15/7

12:45-15:10

Nonstop7h 25m

£648

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Mon 6/7

23:25-10:45

Nonstop6h 20m

Lisbon Humberto Delgado

Tue 14/7

12:45-15:10

Nonstop7h 25m

£648

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 18/7

17:10-11:15

1 stop13h 05m

Lisbon Humberto Delgado

Sun 30/8

12:45-15:15

Nonstop7h 30m

£651

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 28/8

19:10-11:15

1 stop11h 05m

Lisbon Humberto Delgado

Sun 1/11

11:15-13:59

Nonstop7h 44m

£658

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Wed 15/7

17:10-11:15

1 stop13h 05m

Lisbon Humberto Delgado

Wed 29/7

12:45-15:10

Nonstop7h 25m

£659

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Wed 8/7

19:10-11:15

1 stop11h 05m

Lisbon Humberto Delgado

Wed 15/7

12:45-15:10

Nonstop7h 25m

£659

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Mon 8/6

23:25-10:45

Nonstop6h 20m

Lisbon Humberto Delgado

Mon 15/6

12:45-15:14

Nonstop7h 29m

£662

Flights are sorted by cheapest return flights first.

Deals found on 18/5

Showing 1-10 of 24 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 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?

The best time to book flights from Boston to Lisbon is 84 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 £457). Flying from Boston to Lisbon in June is currently the most expensive (average of £798). 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 19 May 2026.

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.

How much does it cost for a return flight 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?

    Within the past month, 6 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 6h 20m. Fly via KLM, Delta, or Virgin Atlantic to get the fastest option. There are 3182 mi between Boston and Lisbon. All flights are typically direct.

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

    Consider JetBlue (88%), TAP AIR PORTUGAL (88%) or Emirates (85%) when booking your flight. These represent the most reliable airlines when flying from Boston to Lisbon.

  • 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 £457). Flying from Boston to Lisbon in June is currently the most expensive (average of £798). 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
Oeiras
Fátima
Setúbal
Nazaré
Madeira
Evora
Estoril
Óbidos
Almada
Beja
Sintra
Costa da Caparica
Sesimbra
Peniche

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Can Cheapflights find flights from Boston to Lisbon with no change fees?

Need flexible booking options for your flight to Lisbon from Boston? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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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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