United Airlines is selling cheap flights from Seattle to Boston for as low as $152 return! That works out to a cost of just 3.1 Cents Per Mile for this 5000 mile journey.

The fare only includes carry-on luggage, so you need to pay extra if you want to check bags.

Our data shows the lowest prices are available in March 2022. See the link(s) below for dates and prices.

Sample date(s) with Kiwi.com booking link

Jan 31 – Feb 7 ($195)


Jan 31 – Feb 7 ($195)


Jan 31 – Feb 7 ($195)


Feb 5 – Feb 10 ($176)


Feb 5 – Feb 10 ($176)


Feb 5 – Feb 10 ($176)


Feb 10 – Feb 13 ($183)


Feb 10 – Feb 13 ($183)


Feb 10 – Feb 13 ($183)


Feb 11 – Feb 14 ($183)


Feb 11 – Feb 14 ($183)


Feb 11 – Feb 14 ($183)


Feb 23 – Mar 9 ($198)


Feb 23 – Mar 9 ($198)


Feb 23 – Mar 9 ($198)


Mar 1 – Mar 10 ($201)


Mar 1 – Mar 10 ($201)


Mar 1 – Mar 10 ($201)


Mar 2 – Mar 9 ($152)


Mar 2 – Mar 9 ($152)


Mar 2 – Mar 9 ($152)


Mar 4 – Mar 7 ($183)


Mar 4 – Mar 7 ($183)


Mar 4 – Mar 7 ($183)


Mar 14 – Mar 17 ($197)


Mar 14 – Mar 17 ($197)


Mar 14 – Mar 17 ($197)


Mar 16 – Mar 28 ($192)


Mar 16 – Mar 28 ($192)


Mar 16 – Mar 28 ($192)

Are you looking for an apartment to rent for your stay in Boston? Check out what Vrbo.com has to offer!

We post many cheap flights like this one from Seattle to Boston every single day, so have a look at our Travel Deals page, or check out the related posts below!

Note: Prices are valid at the time of publishing this post, but may change in the future.

COVID-19 Note: During these uncertain times, please make sure to check the relevant Coronavirus restrictions for your destination before you book and before you fly. We recommend also checking the refund policy of the airline, as well as purchasing travel insurance for your trip.