Cheap flights from Seattle to Boston from $86
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Boston departing on 5/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Seattle to Boston
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Alaska Airlines flights from Seattle to Boston
Our best Alaska Airlines deals on Seattle to Boston flight tickets
Hawaiian Airlines flights from Seattle to Boston
Our best Hawaiian Airlines deals on Seattle to Boston flight tickets
See travel insights to Boston from
How to get the cheapest flight ticket from Seattle to Boston
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Boston?
In general, January is the cheapest month to fly from Seattle to Boston. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $217. If you aren’t able to travel during the month of January, then book flights to Boston from Seattle during February instead. Flights to Boston in February, while not as cheap as those in January, still average around $277.
What is the cheapest day to depart on your flight to Boston?
The cheapest day to depart from Seattle to Boston is on a Friday when prices can be found for as low as $390. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Boston on Sunday is $544.
What is the cheapest time of day to depart on your flight to Boston?
According to our data, the cheapest time of day to fly to Boston is in the afternoon. momondo users have found flights departing from Seattle to Boston in the afternoon for as low as $367. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the morning is when there is more demand to fly to Boston, so prices are often more expensive at around $497 per ticket.
What is the cheapest Seattle/Tacoma Intl to Boston Logan Intl flight route?
Fly from Seattle/Tacoma Intl to Boston Logan Intl for the best Seattle/Tacoma Intl - Boston Logan Intl flight prices
How far in advance should I book a flight to Boston?
You are more likely to see cheaper flights to Boston from Seattle when booking 16 weeks ahead of your departure date. In general, you can expect to find flights to Boston for around $379 when searching 16 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boston from Seattle for as low as $363 on momondo.
What cabin class options are available on Seattle/Tacoma Intl to Boston Logan Intl flights?
There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to Boston Logan Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Seattle/Tacoma Intl to Boston Logan Intl?
Spirit Airlines, Hawaiian Airlines, and Delta are the most popular carriers operating from Seattle/Tacoma Intl to Boston Logan Intl
What airlines fly to Boston?
Delta, Alaska Airlines and JetBlue are the top three most popular airlines that fly to Boston from Seattle according to our data. Delta is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Boston. Keep in mind that there are 9 different airlines that fly to Boston on a routine basis, so you have a few additional options to choose from.
How many flights depart from Seattle to Boston on average per day?
15 flights are operational daily from Seattle to Boston as of March 2025. The most popular departure time for this route is 3:00PM, with 39% of flights per day taking off at noon.
How many flights depart from Seattle to Boston on average per week?
As of March 2025, 105 flights take off from Seattle and land in Boston each week. The most common flight departure day for this route is Wed, with 24% of weekly flights taking off on this day.
When to book flights from Seattle to Boston
Cheap Seattle to Boston (SEA to BOS) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Boston
How far is Seattle/Tacoma Intl to Boston Logan Intl by plane?
Boston Logan Intl is 2484.0 mi away from Seattle/Tacoma Intl. A reasonable flight in good conditions will take 5h 14m.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Boston Logan Intl Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Boston Logan Intl Airport refresh daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Boston Logan Intl Airport?
As of March 2025, there are 9 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Boston Logan Intl Airport.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Boston Logan Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Boston Logan Intl Airport.
What documentation or ID do you need to fly to Boston Logan Intl Airport?
The travel and health documents required for your trip to Boston Logan Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Boston Logan Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Seattle to Boston?
momondo data reveals that the most frequently booked plane model on the route from Seattle to Boston is Airbus A321neo, representing 26.52% of all bookings. The subsequent popular models are Boeing 737 at 21.04%, Airbus A318/A319/A320/A321 at 19.92%, and Boeing 737-900 Passenger/BBJ3 (winglets) at 9.30%.
What is the most popular airline from Seattle to Boston?
momondo data reveals that the most frequently booked airline on the route from Seattle to Boston is Delta, representing 39% of all bookings. The subsequent popular airlines are Alaska Airlines at 30%, JetBlue at 26%, and American Airlines at 2%.
Best airlines flying from Seattle to Boston
Compare and see reviews for airlines that fly from Seattle to Boston with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $137 | Free Cancellation | Rating 7.3 2,998 reviews | |||
| PriceFrom $145 | Free Cancellation | Rating 6.3 7,926 reviews | |||
| PriceFrom $172 | Free Cancellation | Rating 7.0 361 reviews | |||
| PriceFrom $179 | Free Cancellation | Rating 8.0 8,044 reviews | |||
| PriceFrom $222 | Free Cancellation | Rating 8.0 9,711 reviews | |||
| PriceFrom $226 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $236 | Free Cancellation | Rating 7.4 8,655 reviews | |||
| PriceFrom $416 | Free Cancellation | Rating 8.0 4,321 reviews |
Delta Flights From Seattle to Boston
The lowest priced Delta flight from Seattle to Boston from the last 72 hours was $179. Generally, Delta has 10 flights on this route every week with an average price of $418. Delta is rated 8.0/10 by our users.
Alaska Airlines Flights From Seattle to Boston
The best Alaska Airlines deal for Seattle to Boston flight tickets found on momondo in the last 72 hours was $222, round-trip. It should be noted that an average Alaska Airlines flight deal for this route in this time was higher, at $483 round-trip. Alaska Airlines operates 7 flights out of Seattle into Boston in an average week, so prices vary by time and availability. 9,711 Alaska Airlines reviews by users on momondo have scored the airline at 8.0/10.
Traveling to a place near Boston?
Book flights to Boston if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Seattle to Boston?
It is quick and easy to find Seattle to Boston flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Boston that suits you.
Can I find flights from Seattle to Boston with flexible booking policies on momondo?
All flight searches from Seattle to Boston on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Seattle to Boston?
momondo helps you find the best flight between Seattle and Boston by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Seattle to Boston right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Boston, momondo offers a useful price alert feature which will track prices for flights to Boston from Seattle and alert you when they change.