Cheap flights from Boston to Seattle from £134
Trusted by millions
Kiwi.com Guarantee for stress-free travel
One search, all the best deals
Explore flight deals to Seattle
Not happy with the results? Try some of our useful filters
Search by stops
Search by carrier
Search by price
Search by departure date
Not happy with the results? Try some of our useful filters
Search by stops
Search by carrier
Search by price
Search by departure date
How much do flights to Seattle cost?
Cheapest one-way trip | £134 |
|---|---|
Cheapest nonstop round-trip | £385 |
Cheapest round-trip | £299 |
Average round-trip | £390 |
Nonstop flights in April | £221 – £1,008 |
Getting from Seattle airport to the city center
Fastest option: Link Light Rail. Best value: Sound Transit buses and Link Light Rail.
Transport Option | Typical Time | Typical Cost | Frequency | Best For |
|---|---|---|---|---|
35-45 min | $3-$3.25 (fare to downtown stations) | every 6–15 min (traffic dependent) | budget travelers to downtown | |
45-70 min | $2.75-$3.25 (varies by destination zone) | every 15–30 min (traffic dependent) | Bellevue and Eastside | |
50-80 min | $2.75 (flat fare) | every 15–30 min (traffic dependent) | local connections | |
25-50 min | $45-$65 (metered; flat rate to downtown available) | on-demand 24/7 (traffic dependent) | door-to-door convenience | |
25-50 min | $35-$60 (surge pricing may apply) | on-demand 24/7 (traffic dependent) | flexible pickup locations | |
25-50 min | $50-$100 (pre-booked; varies by provider) | by reservation (traffic dependent) | groups and guaranteed pickup | |
25-50 min | $40-$100 (per day; varies by vehicle and provider) | 24/7 availability (traffic dependent) | exploring beyond Seattle |
Notes:
- Prices in USD; table created in 2025 and subject to change.
- Link Light Rail operates from approximately 5:00 AM to midnight, with extended hours on weekends.
- Taxis offer a flat rate of approximately $45 to downtown Seattle; metered fares may vary.
- Ride-hailing pickup is located on the 3rd floor of the parking garage.
- We recommend checking official transport websites for your travel planning.
Updated: December 2025
Key info about flying to Seattle
Weekly direct flights
Discover the top airlines offering direct flights from Boston to Seattle in the next month. You’ll find the number of daily direct flights per airline in the chart.
| Airline | Mon 06.04 | Tue 07.04 | Wed 08.04 | Thu 09.04 | Fri 10.04 | Sat 11.04 | Sun 12.04 |
|---|---|---|---|---|---|---|---|
| --- | 2 | 2 | 3 | --- | --- | --- | |
| 1 | 2 | 2 | 3 | 3 | 3 | 2 | |
| --- | --- | --- | --- | --- | --- | --- | |
| Weekly flights: 23 total | Daily flights: 3.29 average | Most flights: Thursday 3 flights |
| Airline | Mon 13.04 | Tue 14.04 | Wed 15.04 | Thu 16.04 | Fri 17.04 | Sat 18.04 | Sun 19.04 |
|---|---|---|---|---|---|---|---|
| 2 | --- | --- | 1 | --- | 2 | --- | |
| 1 | 2 | 2 | 2 | 3 | 1 | 3 | |
| --- | --- | --- | --- | --- | --- | --- | |
| Weekly flights: 19 total | Daily flights: 2.71 average | Most flights: Friday 3 flights |
| Airline | Mon 20.04 | Tue 21.04 | Wed 22.04 | Thu 23.04 | Fri 24.04 | Sat 25.04 | Sun 26.04 |
|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 2 | 3 | 3 | 3 | |
| 2 | --- | --- | --- | --- | --- | --- | |
| --- | --- | --- | --- | --- | --- | --- | |
| Weekly flights: 19 total | Daily flights: 2.71 average | Most flights: Wednesday 3 flights |
| Airline | Mon 27.04 | Tue 28.04 | Wed 29.04 | Thu 30.04 | Fri 01.05 | Sat 02.05 | Sun 03.05 |
|---|---|---|---|---|---|---|---|
| 3 | 3 | 4 | 4 | 4 | 4 | 4 | |
| --- | --- | --- | --- | --- | --- | --- | |
| --- | --- | --- | --- | --- | --- | --- | |
| Weekly flights: 26 total | Daily flights: 3.71 average | Most flights: Wednesday 4 flights |
Check-in for a flight from Boston to Seattle
| Name | Carrier code | IATA Code | Passport needed during booking |
|---|---|---|---|
| Frontier Airlines | FFT | F9 | No |
| JetBlue Airways | JBU | B6 | No |
| United Airlines | UAL | UA | No |
| Alaska Airlines | ASA | AS | No |
| Spirit Airlines | NKS | NK | No |
Online check-in is not available for these airlines.
Weather in Seattle
Average Weather
| Month | Average monthly max temperature | Average monthly min temperature |
| January | 7°C | 2°C |
| February | 8°C | 2°C |
| March | 10°C | 3°C |
| April | 13°C | 5°C |
| May | 18°C | 8°C |
| June | 21°C | 10°C |
| July | 25°C | 13°C |
| August | 25°C | 14°C |
| September | 22°C | 11°C |
| October | 15°C | 8°C |
| November | 10°C | 4°C |
| December | 6°C | 2°C |
14 day forecast
Seattle travel tips
Stroll along the Seattle Waterfront area, local must-see
The Seattle Waterfront is just a perfect place for strolling. Grab some food and find a secluded spot near the water passing by all street vendors. Enjoy watching the sunset, feel the vibe of Seattle, and appreciate life!
Explore Ballard, the historical neighbourhood of Seattle
To stay downtown is cool, but the neighbourhoods of Seattle are also worth visiting. For example, Ballard is a charming historic neighbourhood, which nowadays is considered to be the trendiest. It’s overflowing with fancy bars, restaurants, stores as well as rich in maritime history. Check it out!
Can we drink tap water in Seattle?
In Seattle, tap water is announced to be safe for drinking. However, to be on the safe side, restrain from drinking it or use an active carbon filter such as TAPP, which is quite affordable. Stay reasonable!
Frequently asked questions
Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any origin and destination in the world by plane. Find the cheapest routes and best deals, as well as the best dates to travel.
Explore alternative trips
Flights from Boston
Flights to Seattle
Popular routes
Airports near Boston
Airports near Seattle
Download our app