$307 Economy Roundtrip to Seattle (BOS-SEA) in May from Boston

Cheap economy Flights: BOS to SEA in May - Route 3

Starting from $428

Flight Options & Prices:

Direct Flights: From $452 - Fastest option with no layovers
One-Stop Flights: From $428 - Good value with one connection
Multi-Stop Flights: From $428 - Cheapest option with multiple connections

Book your economy class flight from Boston (BOS) to Seattle (SEA)and save money on your travel. Compare all flight options to find the best deal for your may trip.

Cheap economy Flights: BOS to SEA in May - Route 4

Starting from $433

Flight Options & Prices:

Direct Flights: From $448 - Fastest option with no layovers
One-Stop Flights: From $433 - Good value with one connection
Multi-Stop Flights: From $433 - Cheapest option with multiple connections

Book your economy class flight from Boston (BOS) to Seattle (SEA)and save money on your travel. Compare all flight options to find the best deal for your may trip.

Cheap economy Flights: BOS to SEA in May - Route 5

Starting from $443

Flight Options & Prices:

Direct Flights: From $494 - Fastest option with no layovers
One-Stop Flights: From $443 - Good value with one connection
Multi-Stop Flights: From $443 - Cheapest option with multiple connections

Book your economy class flight from Boston (BOS) to Seattle (SEA)and save money on your travel. Compare all flight options to find the best deal for your may trip.

Cheap economy Flights: BOS to SEA in May - Route 6

Starting from $443

Flight Options & Prices:

Direct Flights: From $458 - Fastest option with no layovers
One-Stop Flights: From $443 - Good value with one connection
Multi-Stop Flights: From $443 - Cheapest option with multiple connections

Book your economy class flight from Boston (BOS) to Seattle (SEA)and save money on your travel. Compare all flight options to find the best deal for your may trip.

Cheap economy Flights: BOS to SEA in May - Route 7

Starting from $494

Flight Options & Prices:

Direct Flights: From $553 - Fastest option with no layovers
One-Stop Flights: From $494 - Good value with one connection
Multi-Stop Flights: From $494 - Cheapest option with multiple connections

Book your economy class flight from Boston (BOS) to Seattle (SEA)and save money on your travel. Compare all flight options to find the best deal for your may trip.

Best Flights starting from $307

Sun, May 10

Roundtrip

Tue, May 19

Mon, May 11

Roundtrip

Wed, May 20

Sat, May 9

Roundtrip

Mon, May 18

Thu, May 7

Roundtrip

Sat, May 16

Wed, May 6

Roundtrip

Fri, May 15

Fri, May 8

Roundtrip

Sun, May 17

Tue, May 5

Roundtrip

Thu, May 14

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Flight Options & Prices:

Cheap economy Flights: BOS to SEA in May - Route 3

Flight Options & Prices:

Cheap economy Flights: BOS to SEA in May - Route 4

Flight Options & Prices:

Cheap economy Flights: BOS to SEA in May - Route 5

Flight Options & Prices:

Cheap economy Flights: BOS to SEA in May - Route 6

Flight Options & Prices:

Cheap economy Flights: BOS to SEA in May - Route 7

Flight Options & Prices:

Why Choose Economy Class Flights from Boston (BOS) to Seattle (SEA)?