What percentage of Seattle to Boston flights are direct?

Across the trailing quarter, approximately 47.5% of flights from Seattle to Boston are direct. For flights that include stopovers, the median number of stopovers historically has been 2. This means that nearly half of the available flights offer a direct route, while connecting flights typically involve multiple stops. Travelers have a good chance of finding a non-stop option for this route.

What's the flight time from Seattle to Boston?

The typical direct flight time from Seattle to Boston is 5 hours and 25 minutes, covering a distance of 4006 kilometers. For flights with one stop, the median duration is considerably longer, averaging 9 hours and 31 minutes. This difference highlights the time-saving benefit of choosing a direct flight. Travelers should account for the longer travel time if their itinerary includes a layover.

How often do cheap flights from Seattle to Boston come up?

Historically, cheap flights from Seattle to Boston come up frequently. This route is consistently observed to have good deals available. Travelers can often find favorable prices when planning their trips. The frequent availability of cheap flights makes this a convenient route for budget-conscious travelers.

Flights From Seattle

To Boston

Cheap Flights from Seattle to Boston

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Deals from

Seattle

RatePunk searches hundreds of travel sites at once for deals on flights to Boston

Prices updated 2 days ago

405 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated Jul 26, 2026.)

Today’s best flight deals from Seattle to Boston

Explore current cheapest deals departing from Seattle to Boston

2026-10-14 – 2026-10-17
SEA - Boston
78% AI deal score
$311
$271
Round trip
2026-09-22 – 2026-09-29
SEA - Boston
76% AI deal score
$288
$272
Round trip
2026-10-14 – 2026-10-21
SEA - Boston
77% AI deal score
$301
$273
Round trip
2026-09-05 – 2026-09-09
SEA - Boston
75% AI deal score
$296
$281
Round trip
2026-10-07 – 2026-10-17
SEA - Boston
74% AI deal score
$280
$281
Round trip
2026-10-13 – 2026-10-20
SEA - Boston
76% AI deal score
$300
$281
Round trip
2026-10-17 – 2026-10-21
SEA - Boston
77% AI deal score
$313
$281
Round trip
2026-09-22 – 2026-09-26
SEA - Boston
76% AI deal score
$300
$282
Round trip
2026-09-08 – 2026-09-12
SEA - Boston
75% AI deal score
$296
$282
Round trip
2026-09-01 – 2026-09-08
SEA - Boston
74% AI deal score
$283
$282
Round trip

Seattle to Boston: Overview

Insights for flights from Seattle to Boston

A typical journey from Seattle to Boston takes about 5h 25m, including connections. Given that a meaningful share of itineraries are non-stop, the overall median flight time reflects a mix of direct and connecting options. For those itineraries that do involve connections, the median number of stopovers is 2.

For travelers seeking cheap flights from Seattle to Boston, fares typically range from $317–$705, with a median of $427. Right now, current fares are above the typical level. New deals appear almost daily, offering frequent opportunities to find better prices.

When is the cheapest time to fly from Seattle to Boston? The most affordable months to fly are typically February, with a median fare of $293, followed by January at $296, and May at $297. These months offer the lowest median prices for this route.

A meaningful share of recent fares, specifically 47.5%, are for direct flights from Seattle to Boston. For the remaining itineraries, which involve connections, the typical number of stopovers is 2. This indicates that while non-stop options are available, many travelers will find themselves on routes with at least one stop.

The distance between Seattle and Boston is approximately 4006 kilometers. This classifies the route as a long-haul journey, meaning you can expect a significant amount of time in the air.

How much is a round trip from Seattle to Boston

Regular price: $251 - $349

Prices for flights from Seattle to Boston are currently within the regular range.

The regular price range for flights from Seattle to Boston is $251 to $349. The current lowest deal is $263 with JetBlue Airways, for travel from Sep 22-Sep 26.

now $263

Low $251

High $349

The cheapest time to fly from Seattle to Boston

Flights from Seattle to Boston are cheapest in April, with a median price of $197. The most expensive month to fly is August, with a median price of $560. Generally, prices are lower from January to December.

April

Cheapest

Flights from $197

August

Most Expensive

Flights from $560

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from Seattle to Boston

Alaska Airlines, Inc.

Last-minute flights going from Seattle to Boston

Sat, Aug 1

⌛ Last-Minute

SEA - Boston

Seattle (SEA) - Boston (BOS)

Alaska Airlines, Inc.

$541

$422

One-way

Sun, Aug 2

⌛ Last-Minute

SEA - Boston

Seattle (SEA) - Boston (BOS)

Alaska Airlines, Inc.

$602

$488

One-way

Tue, Aug 4

⌛ Last-Minute

SEA - Boston

Seattle (SEA) - Boston (BOS)

United Airlines

$524

$465

One-way

Tue, Aug 11

⌛ Last-Minute

SEA - Boston

Seattle (SEA) - Boston (BOS)

Alaska Airlines, Inc.

$386

$330

One-way

Tue, Aug 11

⌛ Last-Minute

SEA - Boston

Seattle (SEA) - Boston (BOS)

Alaska Airlines, Inc.

$405

$381

One-way

Wed, Aug 12

⌛ Last-Minute

SEA - Boston

Seattle (SEA) - Boston (BOS)

United Airlines

$357

$306

One-way

Biggest price drops on these dates for flights from Seattle to Boston

7 nights

Aug 18 - Aug 25

$475 → $336

29%

8 nights

Aug 18 - Aug 26

$456 → $336

26%

3 nights

Aug 1 - Aug 4

$541 → $422

22%

2 nights

Aug 2 - Aug 4

$602 → $488

19%

Popular Airports to fly from Seattle to Boston

Seattle - Boston route insights

💸 Price insights

Recent fares are above the typical level

Recent fares from Seattle to Boston are above the typical level at $263.

📅 Best time to fly

April is historically the cheapest month to fly

Historically, April is the cheapest month to fly from Seattle to Boston, with a median price of $197.

⏱️ Flight duration

Direct flights average 5h 25m

Direct flights from Seattle to Boston typically take 5h 25m, while connecting flights average 13h 0m.

✈️ Airlines & availability

47.5% of recent flights are direct

Historically, 47.5% of flights from Seattle to Boston are direct, with connecting flights having 2 stopovers.

🏆 Airline highlight

Alaska Airlines, Inc. offers direct flights

Alaska Airlines, Inc. is one airline that has offered direct flights on this route recently.

🎯 Booking tip

Deals appear frequently on this route

Deals from Seattle to Boston appear frequently, with deals occurring often in a 30-day window.

Seattle main airports to depart from

Seattle–Tacoma International (SEA)

Cheapest

Seattle–Tacoma International is a convenient option for flights from Seattle to Boston, offering competitive prices.

📍 ~18 km from city center (reachable by car or train)

💸 Flights from ~$273

Boston main airports to arrive at

Logan International (BOS)

Cheapest

Logan International Airport is a convenient arrival choice for flights from Seattle to Boston.

📍 ~4 km from city center (reachable by car)

💸 Flights from ~$222

Airports nearby Boston used as alternative

Rhode Island T. F. Green Int'l Airport (PVD)

Cheapest

Rhode Island T. F. Green Int'l Airport can be a useful alternative for travelers seeking to avoid Boston Logan's congestion.

📍 ~70 km from Boston (reachable by car)

💸 Flights from ~$238

Business & First Class Flight Deals to Boston

88% AI deal score

$1,540

$1,113

Save $427

Frequently Asked Questions About Flights to Boston

Historically, the optimal time to book flights from Seattle to Boston is typically 14-27 days before departure. During this period, the average price for a flight has been around $338. Booking within 0-6 days of departure, for example, has shown a significantly higher average price of $837. Prices tend to increase as the departure date approaches, with flights booked 7-13 days out averaging $1042.

Across the trailing quarter, a flight from Seattle to Boston is considered cheap if it is priced at or below $317. The median price for this route over the same period was $427. Prices can vary, with 75% of fares historically being $705 or less. Travelers aiming for a good deal should target prices around the $317 mark.

Historically, the cheapest months to fly from Seattle to Boston have been February, January, and May, with median prices of $293, $296, and $297 respectively. The annual median price for this route is $427. While May is also listed as the most expensive month, this indicates price variability within the month; overall, it has offered some of the lowest median fares. Travelers seeking the lowest fares should consider these months.

Seattle to Boston: Overview

Insights for flights from Seattle to Boston

The distance between Seattle and Boston is approximately 4006 kilometers. This classifies the route as a long-haul journey, meaning you can expect a significant amount of time in the air.

How much is a round trip from Seattle to Boston

Regular price: $251 - $349

Prices for flights from Seattle to Boston are currently within the regular range.

The regular price range for flights from Seattle to Boston is $251 to $349. The current lowest deal is $263 with JetBlue Airways, for travel from Sep 22-Sep 26.

now $263

Low $251

High $349

The cheapest time to fly from Seattle to Boston

April

Cheapest

Flights from $197

August

Most Expensive

Flights from $560

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec