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Cheap flights from Boston to Lisbon from £312

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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LIS
15 Jun — 22 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 16 May 2026.

Sun 30/823:45
BOS
-
LIS
1 stop15h 50m
LEVEL
Sun 6/914:00
LIS
-
BOS
1 stop12h 45m
LEVEL
Deal found 13/5£614
Thu 26/1115:34
BOS
-
LIS
1 stop11h 26m
Delta
Thu 3/1211:15
LIS
-
BOS
Nonstop7h 44m
Delta
Deal found 13/5£614
Tue 8/923:25
BOS
-
LIS
Nonstop6h 20m
Delta
Mon 21/912:45
LIS
-
BOS
Nonstop7h 35m
Delta
Deal found 13/5£615
Thu 29/1011:30
BOS
-
LIS
2 stops18h 20m
United Airlines
Mon 2/1113:00
LIS
-
BOS
2 stops28h 47m
United Airlines
Deal found 11/5£617
Wed 4/1115:35
BOS
-
LIS
1 stop12h 30m
Multiple Airlines
Mon 23/1106:30
LIS
-
BOS
1 stop14h 00m
Multiple Airlines
Deal found 13/5£618
Sat 17/1009:55
BOS
-
LIS
1 stop17h 05m
Delta
Sat 31/1011:15
LIS
-
BOS
Nonstop7h 44m
Delta
Deal found 12/5£619
Thu 16/723:25
BOS
-
LIS
Nonstop6h 20m
KLM
Tue 21/712:45
LIS
-
BOS
Nonstop7h 25m
KLM
Deal found 13/5£620
Tue 7/720:27
BOS
-
LIS
1 stop30h 53m
United Airlines
Tue 14/711:25
LIS
-
BOS
1 stop27h 25m
United Airlines
Deal found 11/5£620
Tue 4/810:55
BOS
-
LIS
2 stops17h 25m
United Airlines
Wed 26/811:25
LIS
-
BOS
2 stops27h 23m
United Airlines
Deal found 11/5£622
Mon 6/710:05
BOS
-
LIS
1 stop18h 30m
Air Transat
Sat 25/708:15
LIS
-
BOS
1 stop17h 40m
Air Transat
Deal found 14/5£623
Mon 6/723:25
BOS
-
LIS
Nonstop6h 20m
Delta
Fri 31/712:45
LIS
-
BOS
Nonstop7h 25m
Delta
Deal found 13/5£623
Sun 5/705:45
BOS
-
LIS
1 stop23h 45m
United Airlines
Wed 29/712:55
LIS
-
BOS
1 stop32h 08m
United Airlines
Deal found 11/5£624

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 May 2026.

Round-trip from

£614

One-way from

£312

Popular in

June

Cheapest in

February

Average price

£703
LEVEL
  • LEVEL
  • 30/8-6/9
  • 2 total stops
  • 28h 35m total
  • Boston to Lisbon
Search Deals
LEVEL
  • LEVEL
  • 5/7
  • 1 total stop
  • 27h 55m total
  • Boston to Lisbon
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£100 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 16 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

Wed 4/11

21:40-09:00

Nonstop6h 20m

Lisbon Humberto Delgado

Mon 23/11

11:15-13:59

Nonstop7h 44m

£615

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Wed 12/8

13:34-08:00

1 stop13h 26m

Lisbon Humberto Delgado

Wed 9/9

12:45-15:20

Nonstop7h 35m

£619

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Mon 31/8

23:20-10:45

Nonstop6h 25m

Lisbon Humberto Delgado

Tue 15/9

12:45-15:20

Nonstop7h 35m

£620

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 31/7

23:25-10:45

Nonstop6h 20m

Lisbon Humberto Delgado

Fri 7/8

12:45-15:15

Nonstop7h 30m

£620

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Mon 27/7

23:25-10:45

Nonstop6h 20m

Lisbon Humberto Delgado

Mon 3/8

12:45-15:15

Nonstop7h 30m

£638

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Thu 13/8

23:20-10:45

Nonstop6h 25m

Lisbon Humberto Delgado

Mon 17/8

12:45-15:15

Nonstop7h 30m

£638

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sun 14/6

23:25-10:45

Nonstop6h 20m

Lisbon Humberto Delgado

Sun 21/6

12:45-15:14

Nonstop7h 29m

£642
Fastest return journey

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sun 5/7

23:25-10:45

Nonstop6h 20m

Lisbon Humberto Delgado

Sun 12/7

12:45-15:10

Nonstop7h 25m

£642

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Mon 31/8

23:20-10:45

Nonstop6h 25m

Lisbon Humberto Delgado

Mon 7/9

05:00-16:35

1 stop16h 35m

£646

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

£649

Flights are sorted by cheapest return flights first.

Deals found on 15/5

Showing 1-10 of 22 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 £458). Flying from Boston to Lisbon in June is currently the most expensive (average of £801). 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 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 Delta or KLM 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 (94%), TAP AIR PORTUGAL (94%) or Emirates (94%) 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 £458). Flying from Boston to Lisbon in June is currently the most expensive (average of £801). 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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