To Boston

Cheap Flights from Seattle to Boston

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Seattle

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

Prices updated 24 days ago

486,190 searches this week

171 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated May 29, 2026.)

Today’s best flight deals from Seattle to Boston

Explore current cheapest deals departing from Seattle to Boston

Round trip

Sort by: Cheapest

October 6 - October 7

Cheapest

Best

SEA - Boston

$344

$223

Round trip

September 15 - September 22

SEA - Boston

$299

$256

Round trip

September 23 - September 30

SEA - Boston

$305

$257

Round trip

December 8 - December 12

SEA - Boston

$370

$257

Round trip

September 15 - September 26

SEA - Boston

$277

$264

Round trip

September 22 - September 29

SEA - Boston

$305

$264

Round trip

September 22 - September 24

SEA - Boston

$311

$272

Round trip

August 19 - August 25

Earliest

SEA - Boston

$395

$273

Round trip

September 2 - September 5

SEA - Boston

$300

$273

Round trip

October 13 - October 20

SEA - Boston

$336

$273

Round trip

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Route Intelligence — 486,190 Searches this Week

Insights for flights from Seattle to Boston

A typical journey from Seattle to Boston takes about 11h 58m, including connections. This route covers a substantial distance, classified as a long-haul flight, spanning 4006 kilometers between the two cities. Given the travel time, it is important to consider the overall duration when planning your trip.

For travelers looking for cheap flights from Seattle to Boston, fares right now are significantly above the typical level. Prices for this route typically range from $311–$701, with a median of $414. New deals appear almost daily, suggesting frequent opportunities to find better prices if you monitor the route.

When is the cheapest time to fly from Seattle to Boston? The data indicates that February is typically the most affordable month, with a median fare of $293. January follows closely with a median fare of $296, and May also offers competitive pricing at a median of $297. Planning your travel during these months could result in lower costs.

Regarding direct flights from Seattle to Boston, a meaningful share are non-stop, with 51.7% of recent fares being direct. For itineraries that include connections, the typical number of stopovers is 2. This means you have options for both direct travel and connecting flights, depending on your preference for speed versus potential cost savings.

How much is a round trip from Seattle to Boston

Regular price: $282 - $361

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

The regular price range for flights from Seattle to Boston is between $282 and $361. The current lowest deal is $223 with Southwest Airlines, for travel from Oct 6 to Oct 7.

now $223

Low $282

High $361

The cheapest time to fly from Seattle to Boston

The cheapest month to fly from Seattle to Boston is February, with a median price of $293. The most expensive month is April, with a median price of $669. Prices are generally lower from January to December.

February

Cheapest

Flights from $293

April

Most Expensive

Flights from $669

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from Seattle to Boston

JetBlue Airways

Last-minute flights going from Seattle to Boston

Tue, Jul 7

⌛ Last-Minute

SEA - Boston

Seattle (SEA) - Boston (BOS)

Deutsche Luft Hansa

$295

$318

One-way

Wed, Jul 8

⌛ Last-Minute

SEA - Boston

Seattle (SEA) - Boston (BOS)

Alaska Airlines, Inc.

$306

$318

One-way

Tue, Aug 4

⌛ Last-Minute

SEA - Boston

Seattle (SEA) - Boston (BOS)

Southwest Airlines

$334

$282

One-way

Tue, Aug 4

⌛ Last-Minute

SEA - Boston

Seattle (SEA) - Boston (BOS)

American Airlines

$385

$311

One-way

Thu, Aug 6

⌛ Last-Minute

SEA - Boston

Seattle (SEA) - Boston (BOS)

Alaska Airlines, Inc.

$350

$334

One-way

Fri, Aug 7

⌛ Last-Minute

SEA - Boston

Seattle (SEA) - Boston (BOS)

Alaska Airlines, Inc.

$411

$329

One-way

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

6 nights

Aug 19 - Aug 25

$395 → $273

31%

1 night

Oct 6 - Oct 7

$344 → $223

35%

4 nights

Dec 8 - Dec 12

$370 → $257

31%

4 nights

Aug 14 - Aug 18

$409 → $299

27%

Popular Airports to fly from Seattle to Boston

Seattle - Boston route insights

💸 Price insights

Recent fares are above the typical level.

Recent fares for Seattle to Boston are above the typical level, with a median price of $414.

📅 Best time to fly

February is historically the cheapest month to fly.

Historically, February is the cheapest month to fly from Seattle to Boston, with a median price of $293.

⏱️ Flight duration

Flights typically take 11h 58m.

The median flight duration from Seattle to Boston is 11 hours and 58 minutes, classifying it as a long-haul route.

✈️ Airlines & availability

Direct flights are available from JetBlue Airways.

JetBlue Airways offers direct flights on this route. Connecting flights often have 2 stopovers.

🏆 Airline highlight

Southwest Airlines offers a recent deal for $223.

A recent deal on Southwest Airlines from Seattle to Boston was found for $223 via Skyscanner.

🎯 Booking tip

Deals are frequent, appearing daily.

Deals for flights from Seattle to Boston are frequent, with over 1 deal per day historically.

Seattle main airports to depart from

Seattle–Tacoma International (SEA)

Cheapest

Seattle–Tacoma International offers the cheapest flights from Seattle to Boston.

📍 ~20 km from Seattle (reachable by car or train)

💸 Flights from ~$223

Boeing Field (BFI)

Boeing Field is an alternative departure airport for flights from Seattle to Boston.

📍 ~10 km from Seattle (reachable by car)

💸 Flights from ~$741

Kenmore Air Harbor Seaplane Base (LKE)

Kenmore Air Harbor Seaplane Base is an alternative departure airport for flights from Seattle to Boston.

📍 ~5 km from Seattle (reachable by car)

💸 Flights from ~$1320

Boston main airports to arrive at

Logan International (BOS)

Cheapest

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

📍 ~5 km from Boston city center (reachable by car or public transport)

💸 Flights from ~$223

Airports nearby Boston used as alternative

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

Rhode Island T. F. Green Int'l Airport is a major regional alternative with a wide range of connections.

📍 ~70 km from Boston (approximately 1 hour drive from downtown Boston depending on traffic)

💸 Flights from ~$309

Manchester–Boston Regional (MHT)

Manchester–Boston Regional is a primary alternative for travelers north of Boston, with strong domestic network.

📍 ~75 km from Boston

💸 Flights from ~$332

Bradley International (BDL)

Bradley International is a large international airport, a reliable alternative for long-haul domestic flights.

📍 ~140 km from Boston (requiring a nearly 2-hour drive)

💸 Flights from ~$287

Portland International Jetport (PWM)

Cheapest

Portland International Jetport offers good connectivity for travelers located in the northern suburbs or heading to Maine.

📍 ~160 km from Boston

💸 Flights from ~$264

Worcester Regional (ORH)

Worcester Regional is geographically close to the western Boston suburbs, offering a low-stress environment.

📍 ~60 km from Boston

💸 Flights from ~$385

Business & First Class Flight Deals to Boston

73% AI deal score

$1,636

From SEA

Elite

Jul 13

Boston, United States

73% AI deal score

$1,793

Frequently Asked Questions About Flights to Boston

Historically, the optimal booking window for flights from Seattle to Boston is typically 14-27 days before departure. During this period, the average price observed was $338. Booking within 0-6 days of departure generally sees a significantly higher average price of $837. For those booking 7-13 days out, the average price was $1042, indicating that waiting too long can lead to increased costs.

Across the trailing quarter, a good price for a flight from Seattle to Boston is considered to be $311 or less. The median price for this route historically stands at $414. About 25% of all observed fares for this route were at or below the $311 mark, indicating that prices can often be higher, with 75% of fares being $701 or less.

Historically, the cheapest months to fly from Seattle to Boston are typically February, January, and May. In February, the median price was $293, while January saw a median price of $296. May also offered competitive pricing with a median of $297. The annual median price for this route is $414, suggesting that these months offer notable savings.

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