Route Overview: Seattle to Boston
Traveling from the Pacific Northwest to the historic Atlantic coast is a popular transcontinental journey. Whether you are flying for business, visiting the prestigious universities in Cambridge, or exploring the Freedom Trail, cheap flights from Seattle to Boston are readily available throughout the year. At Faresterminal, we simplify the process of comparing carriers to ensure you get the best value for your SEA to BOS nonstop journey. Currently, we have found a live one-way Economy fare for 2026-10-26 at $223 on DL, which is a nonstop service taking approximately 5 hours and 28 minutes. Please note that prices change daily based on demand and availability.
Flight duration and schedule
The average flight duration for a nonstop flight from Seattle to Boston is roughly 5 hours and 15 minutes to 5 hours and 45 minutes when flying eastbound. This is due to the prevailing jet stream which often pushes aircraft faster toward the East Coast. Conversely, the return trip from Boston to Seattle typically takes closer to 6 hours and 15 minutes. Airlines typically schedule several morning departures and at least one or two red-eye flights that depart Seattle late in the evening and arrive in Boston the following morning around 7:00 AM or 8:00 AM.
Nonstop vs one-stop options
For the most convenient experience, nonstop flights are the gold standard. However, travelers looking to save money or those booking last minute might find better value in one-stop itineraries. Common connection points for this route include Chicago (ORD), Minneapolis (MSP), and Denver (DEN). While a nonstop flight saves you roughly 2 to 4 hours of total travel time, a connection can sometimes lower the fare by 15-20% during peak travel seasons.
Distance and typical aircraft
The great circle distance between Seattle-Tacoma International Airport (SEA) and Boston Logan International Airport (BOS) is approximately 2,496 miles. On this route, airlines primarily deploy narrow-body aircraft designed for transcontinental range. You will frequently see the Boeing 737-900ER, the Boeing 737 MAX 9, and the Airbus A321neo. These modern aircraft are equipped with high-speed Wi-Fi and power outlets to keep you productive during the cross-country haul.
Airlines, Alliances and Aircraft on the SEA-BOS Route
Several major carriers dominate the skies between Seattle and Boston, offering a mix of full-service amenities and competitive pricing.
Alaska Airlines: The Hometown Favorite
As Seattle’s primary hub carrier, Alaska Airlines offers multiple daily nonstop flights to Boston. Being part of the oneworld alliance, Alaska provides excellent connectivity for international travelers. Their Boeing 737 fleet is the backbone of this route, often featuring a three-class configuration: First Class, Premium Class, and Main Cabin. Alaska is known for its West Coast hospitality and locally sourced onboard snacks.
Delta Air Lines: The SkyTeam Powerhouse
Delta Air Lines maintains a significant hub at SEA and considers BOS a key coastal hub, making them a top choice for SEA to BOS nonstop service. Delta often utilizes the Airbus A321neo on this route, which features their latest cabin interiors and high-definition seatback entertainment. Our current featured fare of $223 on DL highlights the competitive nature of their pricing for late 2026.
JetBlue: The Boutique Experience
JetBlue Airways offers a unique product on this route, often emphasizing passenger comfort with the most legroom in coach (based on average fleet-wide seat pitch). While they are not part of a major global alliance, their loyalty program is popular among East Coast travelers. They frequently operate the Airbus A321, providing a quiet and modern cabin environment.
Cabin classes and seat tips
If you are flying a red-eye, we highly recommend upgrading to Premium Economy or Delta Comfort+ to gain those extra few inches of recline and legroom. For the best views during arrival into Boston, try to sit on the left side of the aircraft; on clear days, you might catch a glimpse of the Boston Harbor and the downtown skyline as the plane maneuvers for landing on Runway 4R or 22L.
Departure Airport Guide: SEA
Seattle-Tacoma International Airport (SEA) is the primary gateway for the Pacific Northwest. It is a bustling facility that has undergone significant renovations to improve passenger flow.
Terminals and check-in
SEA consists of a Central Terminal with four concourses (A, B, C, and D) and two satellite terminals (North and South). Alaska Airlines primarily operates out of the North Satellite and Concourse C, while Delta is largely centered in Concourse A and the South Satellite. Check-in counters are located on the upper level of the main terminal. We recommend arriving at least 2.5 hours before your flight to Boston, especially during the morning rush.
Getting to the airport
The Link Light Rail is the most cost-effective way to reach SEA from downtown Seattle, taking about 40 minutes. If you prefer a more direct route, several airport shuttles and private car services are available. For personalized assistance with your travel arrangements, you can always call 1-800-518-9067 to speak with our experts.
Parking and rideshare pickup
Rideshare services like Uber and Lyft pick up on the third floor of the parking garage. If you are driving yourself, the airport offers terminal direct parking and general parking, though off-site lots with shuttle service often provide a cheaper alternative for long-term stays.
Arrival Airport Guide: BOS
Boston Logan International Airport (BOS) is located in East Boston and is surprisingly close to the city center compared to other major US airports.
Terminals and baggage claim
Logan has four terminals: A, B, C, and E. Delta typically arrives at Terminal A, while Alaska and JetBlue are usually found in Terminal C. Terminal B is home to American and United. Baggage claim is located on the lower level of each terminal. The airport is well-signed, making it easy to find your way to the Silver Line or the Blue Line for transit.
Ground transportation into the city
Boston offers excellent public transit. The Silver Line (SL1) bus is free from the airport to South Station, where you can connect to the Red Line or commuter rails. The Blue Line subway is accessible via a free shuttle bus from all terminals. For a more scenic entry, consider the Logan Express water taxi, which takes you across the harbor directly to the Long Wharf area.
Cheapest Time to Fly and Fare Trends
Fares fluctuate based on the season, with summer and major holidays commanding the highest prices. Finding cheap flights from Seattle to Boston requires a bit of timing and strategy.
Best days and months to book
Historically, Tuesday and Wednesday are the cheapest days to fly. Booking at least 21 to 45 days in advance is the sweet spot for domestic transcontinental routes. Avoid booking on Friday afternoons when business travelers are finalizing their weekly plans.
Typical fare ranges by season
| Season | Typical one-way fare | Notes |
|---|---|---|
| Spring | $180 - $310 | Mild weather, popular for university tours. |
| Summer | $350 - $600 | Peak tourist season and graduation weeks. |
| Fall | $190 - $280 | Best value for foliage and pleasant weather. |
| Winter | $140 - $250 | Cheapest fares, but watch for snow delays. |
How to lock in the lowest fare on Faresterminal
Use our comparison tool to view a wide range of dates. If you find a price like our $223 on DL offer, it is often wise to book immediately as these fares are limited. For complex itineraries or group bookings, call 1-800-518-9067 for exclusive phone-only deals that may not be published online.
Baggage Information and Fees
Baggage policies vary significantly by airline and fare class. Most Basic Economy tickets do not include a checked bag, and some may even restrict carry-on overhead bin space.
| Airline | Carry-on | First checked bag | Second checked bag |
|---|---|---|---|
| Alaska Airlines | Free | $35 | $45 |
| Delta Air Lines | Free | $35 | $50 |
| JetBlue | Free* | $35 | $60 |
| United Airlines | Free* | $40 | $50 |
*Note: Restrictions apply to Basic Economy fares. Prices are subject to change by the airlines.
How to avoid baggage fees
One of the best ways to avoid fees is to hold a co-branded airline credit card, which often grants the first checked bag for free. Alternatively, booking a Premium Economy or First Class seat usually includes two checked bags. Always weigh your bags at home to avoid overweight surcharges at the airport counters.
Weather in Boston Through the Seasons
Boston experiences four distinct seasons, each offering a different atmosphere for travelers arriving from Seattle.
| Season | Typical weather | What to pack |
|---|---|---|
| Spring | 45F to 65F | Light jacket and an umbrella for rain. |
| Summer | 70F to 85F | Breathable clothing and comfortable walking shoes. |
| Fall | 50F to 70F | Layers and a camera for the autumn leaves. |
| Winter | 25F to 40F | Heavy coat, gloves, and waterproof boots. |
Best months to visit
The best time to visit Boston is from June to October. While summer is busy, the outdoor cafes and harbor cruises are in full swing. September and October offer the famous New England foliage and crisp air that is perfect for walking the city.
Where to Stay in Boston
Choosing the right neighborhood can make or break your trip. Boston is a very walkable city, but each area has its own personality.
Back Bay
Home to Newbury Street and the Prudential Center, this is the place for high-end shopping and luxury hotels. It is centrally located and features beautiful Victorian brownstones.
North End
The citys oldest residential neighborhood is known for its Italian heritage. Stay here if you want to be steps away from the best pasta and cannoli in the world, as well as the Paul Revere House.
Seaport District
This is Bostons newest and most modern neighborhood. It features sleek glass hotels, trendy rooftop bars, and excellent views of the harbor. It is also very close to the airport.
Events and Reasons to Visit Boston
Boston is a city of firsts and a hub of American history. Major events include the Boston Marathon in April, the Harborfest in July, and the Head of the Charles Regatta in October. Sports fans flock to Fenway Park to see the Red Sox or to the TD Garden for the Celtics and Bruins. The city is also a gateway to the rest of New England, making it a perfect starting point for a road trip to Maine or New Hampshire.
Travel Tips for Seattle to Boston Flyers
- Set fare alerts on all Faresterminal route guides to catch price drops.
- Download your airlines app before boarding for real-time gate updates.
- Pack a portable charger; transcontinental flights drain battery quickly.
- The SEA to BOS route is long; stay hydrated and stretch your legs.
- Visit the SkyTap at SEA for a pre-flight local craft beer.
- In Boston, use the CharlieCard for discounted subway and bus fares.
- Make dining reservations in advance for popular spots in the North End.
- Check the TSA Wait Times app before heading to SEA airport.
Nearby and Related Routes
If you are exploring other parts of the country, Faresterminal offers competitive rates on many popular routes. Travelers often compare these options when planning their next domestic getaway. You might also be interested in routes such as New York to Los Angeles (JFK-LAX), Los Angeles to New York (LAX-JFK), Chicago to Miami (ORD-MIA), Dallas to Las Vegas (DFW-LAS), Atlanta to Orlando (ATL-MCO), San Francisco to Seattle (SFO-SEA), Newark to Fort Lauderdale (EWR-FLL), and Boston to Washington (BOS-DCA).