$358 Cheap Delta flights Boston (BOS) to Lisbon (LIS)

Set the “Price (lowest to highest)” filter on Expedia to find cheap Delta Air Lines round-trip flights from $708 from BOS to LIS. Affordable one-way options from $358 are available too.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Delta Air Lines flights to Lisbon District are generally more affordable in the quieter months of January and February. Whether you’re in search of a one-way or a return ticket, you could land a better deal then.

Start your search for Delta Air Lines flights from BOS to LIS about one month before you want to leave. The most affordable time to book an international flight is generally 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. Regardless of itinerary or ticket type, the best day of the week to book international airfare is usually Sunday. Friday is often the most expensive. Travelers booking on a Sunday can save an average of 17% compared to those who book on a Friday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Use our “Nonstop” filter when searching for direct Delta Air Lines flights from BOS to LIS. It’s also a good way to compare other carriers offering the same nonstop route.

To find the earliest departure from BOS to LIS with Delta Air Lines, filter your search by “Morning” and “Early Morning.” Booking an early flight generally means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Delta Air Lines flights from Logan Intl. Airport (BOS) to Lisbon District come in to Humberto Delgado Airport (LIS). This is the main entry point to this city.

Delta Air Lines makes flying from BOS to LIS enjoyable with an excellent in-flight experience and a rewarding loyalty program. You even have the chance to collect points with Delta SkyMiles. Remember to sign up to our free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are typically free within 24 hours of making a booking, but your airline may charge a fee after that. For further details about modifying your flights, head to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the freedom to make changes without being charged, tick the “Changes included” and “No cancel fee” filters when organizing your next getaway.