$124 Cheap Delta flights Seattle (SEA) to Boston (BOS)

Set the “Price (lowest to highest)” filter on Expedia to look for cheap Delta Air Lines return flights from $247 from SEA to BOS. Affordable one-way fares from $124 are also available.**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 Boston tend to be more affordable in the quieter months of January and February. Whether you’re after a round-trip or one-way ticket, you could find a better deal then.

Search for affordable Delta Air Lines flights from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS) one to three months before your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and journey, the ideal day to book a domestic flight is usually Sunday and the most expensive is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**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.

Depart on one of Delta Air Lines’s 14 direct weekly flights from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS). To see your options, enter your destination, origin and dates and hit search. Then apply the “Nonstop” and “Airline” filters.

Take off from Seattle - Tacoma Intl. Airport (SEA) for Logan Intl. Airport (BOS) on a direct Delta Air Lines flight, and you’ll be in the air for around 5h 27m.

If you’re looking for flexibility, Thursday offers the most choice for Delta Air Lines flights from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS). You can select from 2 different departures.

Setting off from SEA at 7:30AM UTC-8, the earliest Delta Air Lines flight to BOS lands at 3:59PM UTC-5. Traveling early means you’re less likely to encounter delays.* Prefer to travel later? The last Delta Air Lines flight from SEA to BOS departs at 10:29PM UTC-8 and touches down at 6:55AM UTC-5.*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.

Hop on a Delta Air Lines flight from Seattle - Tacoma Intl. Airport (SEA) to Boston, and you’re most likely to land at Logan Intl. Airport (BOS). This is the airline’s primary hub in this destination.

Delta Air Lines makes traveling from SEA to BOS more enjoyable with an excellent in-flight experience and a rewarding loyalty program. You also have the chance to earn points with Delta SkyMiles. Don’t forget to join Expedia’s free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Delta Air Lines typically uses Airbus A321neo planes for flights from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS). Remember that aircraft type can differ depending on operational needs, so the plane you’ll be on might be different on your day of travel.

It’s generally possible to modify or cancel your flight, although additional fees may apply if you booked over 24 hours ago. Want to keep your options open? Make use of our “Changes included” or “No cancel fee” filter to find flights that won’t penalize you if you need to alter your plans. To make modifications, go to “Trips,” select your flight and click on “Manage Booking” for more details.