$179 Cheap Sun Country Airlines flights Seattle (SEA) to Boston (BOS)

Landing cheap one-way Sun Country Airlines flights from SEA to BOS from $179 on Expedia couldn’t be easier — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly return fares from $343 for your next getaway.**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.

Sun Country Airlines flights to Boston are typically cheaper in the quieter months of January and February. Whether you’re after a return or one-way ticket, you could find a better deal then.

Begin your search one to three months ahead of your departure date to find cheaper fares on Sun Country Airlines flights from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Time it well, and you can enjoy significant savings on domestic journeys.*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.

Select our “Nonstop” filter when looking for direct Sun Country Airlines flights from SEA to BOS. It’s also an easy way to compare other airlines servicing the same direct route.

Browse Sun Country Airlines’s earliest flights from SEA to BOS by using our “Early Morning” and “Morning” filters. Not only will you arrive at your destination sooner, early departures also experience 20% fewer cancellations.**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 Sun Country Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to Boston, and you’ll most likely come in to Logan Intl. Airport (BOS). This is the airline’s primary hub in this city.

You can have 1 cabin bag weighing up to 33 lb and dimensions less than 23 inches x 10 inches x 15 inches. You may also take a small personal item with you when traveling standard economy from SEA to BOS with Sun Country Airlines. Baggage restrictions may vary by cabin class and ticket type, so check Sun Country Airlines’s website to avoid additional fees at the airport.

With top-tier customer service and a rewarding loyalty program, Sun Country Airlines is a top choice for many travelers heading from SEA to BOS. Also, if you’re a Sun Country Rewards and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be spent on future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your ticket type, a fee will generally apply if you cancel or reschedule your flight more than 24 hours after it has been confirmed. To find flexible fares, select our “Changes included” or “No cancel fee” filter when searching for flights. For more information on modifying or canceling your reservation, head to “Trips,” select your flight and click on “Manage Booking.”