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Cheap flights from Boston to Lisbon from £239

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 19/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LIS
12 Aug — 19 Aug1
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 15 days in advance, depart on a Friday or Tuesday and return on a Monday

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 13 July 2026.

Sat 15/823:20
BOS
-
LIS
Nonstop6h 25m
Delta
Tue 1/909:50
LIS
-
BOS
2 stops18h 40m
Delta
Deal found 10/7£581
Fri 21/817:10
BOS
-
LIS
1 stop19h 40m
Delta
Mon 31/812:45
LIS
-
BOS
Nonstop7h 30m
Delta
Deal found 10/7£582
Wed 19/809:05
BOS
-
LIS
2 stops18h 45m
Delta
Tue 25/812:45
LIS
-
BOS
Nonstop7h 30m
Delta
Deal found 10/7£583
Sun 6/923:00
BOS
-
LIS
1 stop13h 15m
TAP AIR PORTUGAL
Sat 12/909:30
LIS
-
BOS
1 stop15h 50m
TAP AIR PORTUGAL
Deal found 12/7£583
Fri 7/820:25
BOS
-
LIS
1 stop17h 20m
Delta
Tue 11/812:45
LIS
-
BOS
Nonstop7h 30m
Delta
Deal found 9/7£584
Sun 23/806:05
BOS
-
LIS
1 stop20h 55m
Delta
Mon 31/811:55
LIS
-
BOS
1 stop30h 24m
Delta
Deal found 11/7£585
Tue 18/821:45
BOS
-
LIS
1 stop12h 10m
Delta
Thu 27/810:00
LIS
-
BOS
1 stop11h 13m
Delta
Deal found 10/7£586
Fri 21/821:45
BOS
-
LIS
1 stop12h 10m
Delta
Wed 26/805:00
LIS
-
BOS
1 stop13h 18m
Delta
Deal found 9/7£587
Mon 3/823:20
BOS
-
LIS
Nonstop6h 25m
Delta
Mon 10/809:50
LIS
-
BOS
1 stop14h 45m
Delta
Deal found 11/7£588
Fri 13/1122:10
BOS
-
LIS
Nonstop6h 35m
TAP AIR PORTUGAL
Tue 17/1116:00
LIS
-
BOS
1 stop9h 45m
TAP AIR PORTUGAL
Deal found 9/7£589
Tue 18/821:45
BOS
-
LIS
1 stop12h 10m
Delta
Sat 29/805:00
LIS
-
BOS
1 stop13h 18m
Delta
Deal found 10/7£590

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 13 July 2026.

Round-trip from

£581

One-way from

£239

Popular in

June

Cheapest in

February

Average price

£795
Delta
  • Delta
  • 15/8-1/9
  • 2 total stops
  • 25h 05m total
  • Boston to Lisbon
Search Deals
LEVEL
  • LEVEL
  • 19/7
  • 1 total stop
  • 16h 55m total
  • Boston to Lisbon
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£116 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 July 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 13 July 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

Mon 3/8

23:20-10:45

Nonstop6h 25m

Lisbon Humberto Delgado

Tue 11/8

05:00-16:37

1 stop16h 37m

£587

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 21/8

21:45-14:55

1 stop12h 10m

Lisbon Humberto Delgado

Wed 26/8

05:00-13:18

1 stop13h 18m

£587

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 25/7

19:10-14:55

1 stop14h 45m

Lisbon Humberto Delgado

Sun 2/8

05:00-16:37

1 stop16h 37m

£601

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Wed 7/10

21:45-14:55

1 stop12h 10m

Lisbon Humberto Delgado

Fri 13/11

11:15-13:59

Nonstop7h 44m

£604

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sun 2/8

23:20-10:45

Nonstop6h 25m

Lisbon Humberto Delgado

Sun 16/8

12:15-19:35

1 stop12h 20m

£611

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 1/1

21:30-09:00

Nonstop6h 30m

Lisbon Humberto Delgado

Fri 8/1

11:15-19:28

1 stop13h 13m

£639
Fastest return journey

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Sat 2/1

21:30-09:00

Nonstop6h 30m

Lisbon Humberto Delgado

Sat 9/1

11:15-18:27

1 stop12h 12m

£639

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Fri 14/8

23:20-10:45

Nonstop6h 25m

Lisbon Humberto Delgado

Tue 25/8

05:35-19:15

2 stops18h 40m

£643

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Mon 17/8

14:28-10:30

1 stop15h 02m

Lisbon Humberto Delgado

Wed 26/8

11:25-21:27

1 stop15h 02m

£652

BostonLisbon

BOS - LIS

BOSLIS

Boston Logan Intl

Wed 16/9

23:25-10:45

Nonstop6h 20m

Lisbon Humberto Delgado

Sat 3/10

05:00-16:36

1 stop16h 36m

£658

Flights are sorted by cheapest return flights first.

Deals found on 9/7

Showing 1-10 of 23 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 14 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 £469). Flying from Boston to Lisbon in June is currently the most expensive (average of £812). 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 13 July 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, 5 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 25m. Fly via Delta 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 (82%), TAP AIR PORTUGAL (82%) or Emirates (78%) 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 £469). Flying from Boston to Lisbon in June is currently the most expensive (average of £812). 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
Nazaré
Evora
Madeira
Óbidos
Setúbal
Almada
Tomar
Beja
Estoril
Figueira da Foz
Sintra
Costa da Caparica
Sesimbra

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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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