Boston to Seattle flights – the most comfortable way to fly
2 airlines fly nonstop between Boston and Seattle, about 21 flights a week. The flight takes 5h 35m and covers 4,005 km. The most comfortable economy seat is on Delta's Airbus A220-300. Lie-flat business class is available.
Most comfortable economy
- 31″ legroom
- 18.6″ wide seat
- Cabin altitude 7,500 ft
- Wi-Fi
- Power
Most comfortable business
- Lie-flat bed (80″)
- 22.0″ wide seat
- Direct aisle access
- Suite with door
- Cabin altitude 8,000 ft
- Wi-Fi
- Power
- Seat-back screen
Nonstop flights from Boston to Seattle
| Flight | Departs | Duration | Aircraft | Economy | Business | Days |
|---|---|---|---|---|---|---|
| Delta DL737 BOS → SEA |
08:10 | 5h 35m | A321neo Narrow-body |
5.3Okay | 7.4Very comfortable | MTWTFSS |
| JetBlue B67007 BOS → SEA |
10:00 | 5h 35m | A321neo Narrow-body |
6.2Comfortable | 8.9Superb | MTWTFSS |
| Delta DL3295 BOS → SEA |
15:55 | 5h 35m | A220-300 Narrow-body |
6.5Comfortable | 7.4Very comfortable | MTWTFSS |
Frequently asked questions
How long is the flight from Boston to Seattle?
A nonstop flight from Boston to Seattle takes about 5 h 35 min and covers 4,005 km.
Which airlines fly nonstop from Boston to Seattle?
Delta and JetBlue fly nonstop, with about 21 flights a week.
What is the most comfortable economy seat from Boston to Seattle?
Delta on the Airbus A220-300: 2-3 layout, 31″ legroom and 18.6″ wide seats – comfort score 6.5/10 (comfortable).
Is there lie-flat business class from Boston to Seattle?
Yes. The most comfortable is JetBlue's business suite with door on the Airbus A321neo (1-1), comfort score 8.9/10.
Can I fly with my dog from Boston to Seattle?
Yes – Delta and JetBlue take small dogs in the cabin (usually up to 9 kg including the bag).
Is business class worth it from Boston to Seattle?
Business is a private suite with a door and a lie-flat bed for about 551% more than economy on JetBlue – SkyBuddy's upgrade score: 2.5/10 (not worth it).
Which aircraft fly from Boston to Seattle?
Airbus A321neo and Airbus A220-300.
Schedules, seat details and fares are indicative estimates from SkyBuddy's airline model. Check the live price before you book.