Boston to Seattle (BOS–BFI) — Airlines, Schedules & Connections

BOS Airport Page →
2,488 mi airlines charter/private 1/wk
On-time Some delays Frequent delays
Connecting Flight Schedule 10 1-stop flights Verified 1w ago
Also flown by charter / private operators.
Nonstop Charter / private 1-Stop 2-Stop Hide separate tickets Hide overnight Hide codeshares
  Flight Airline AC Dep Arr Dur OTP Sched  
✈ Nonstop

No flights match your filters.

No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.

✦ 1-Stop connections via 10 hubs
SLC Salt Lake City 8h 23m AFB6DL → EJAPXTUA Salt Lake City (SLC) to Seattle flights
LAX Los Angeles 10h 9m AAAZB6 → UA Los Angeles (LAX) to Seattle flights
BUF Buffalo ~8h 7m AAB6EI → Buffalo (BUF) to Seattle flights
IAD Dulles ~8h 24m AVAZCM → DL Dulles (IAD) to Seattle flights
JFK New York ~8h 47m AAAFAM → DL New York (JFK) to Seattle flights
MCI Kansas City ~8h 48m AFDLKE → Kansas City (MCI) to Seattle flights
ATL Atlanta ~9h 43m AFAMB6 → Atlanta (ATL) to Seattle flights
BWI Baltimore ~9h 45m AADLKE → DL Baltimore (BWI) to Seattle flights
SAN San Diego ~9h 49m ASB6DL → San Diego (SAN) to Seattle flights
TPA Tampa ~10h 32m AFB6DL → Tampa (TPA) to Seattle flights
✦ 1-STOP More options, longer trips
✧ 2-STOP Loading... Reach the hardest destinations
Boston to Seattle
Connecting service available through multiple hubs.
2,488 mi 4h 56m nonstop -3h behind

While no nonstop service exists between BOS and BFI, 1-stop connecting options are available.

Also explore BOS Routes BFI Routes BOS Live Flights BFI Live Flights BOS Delays
All flights from Seattle (BFI) Seattle to Boston flights
Connections

Connection Landscape

1-stop and 2-stop options for BOS to BFI.
1-STOP
One-Stop Connections
10
Hubs
~8h
Fastest
~10h
Longest
BUF ~8h 7m SLC ~8h 23m IAD ~8h 24m JFK ~8h 47m MCI ~8h 48m
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
130
Candidates
Two-stop connections loaded in the connections tab above.
Connections computed from published schedules with minimum connection time verification. Use the interactive explorer above the fold to filter by airline, tier, and layover time.
Reliability

On-Time Performance

What to expect at each end of your journey.
Outbound
BOS → BFI
100%
Generally reliable. Most flights run on time.
Departing
100%
Return
BFI → BOS
90%
Generally reliable. Most flights run on time.
Arriving
90%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. BOS delays →
Alternatives

Other ways to reach Seattle from Boston

Nearby airports with service to King County International Airport - Boeing Field.
Metric BOS→BFI BED→BFI PSM→BFI
Distance from BOS – 16 mi 50 mi
Nonstop airlines – 1 1
Weekly flights – 1 1
Flight time 4h 56m 5h 26m 4h 54m
Departure OTP 100% – –
Bedford (BED) to Seattle flights · Portsmouth (PSM) to Seattle flights
Airports within 200 miles of BOS with service to King County International Airport - Boeing Field.
Know before you go

Travel Essentials

Practical planning for this route.
Time Difference
-3h
Seattle is 3 hours behind Boston.
BOS: EDT · BFI: PDT

When it's 6:00 PM in Boston, it's 3:00 PM in Seattle.
Distance & Flight Time
2,488 mi / 4,003 km
Nonstop flight time is approximately 4h 56m gate to gate.
Getting to BOS

MBTA Silver Line SL1 bus runs from South Station (Red Line, Amtrak) through the Ted Williams Tunnel to all Logan terminals; free from the airport, $2.40 inbound. Journey from South Station takes 15–20 minutes depending on traffic. The Blue Line Aquarium station connects to a free water taxi ($12) across the harbor to Logan; scenic but weather-dependent.Taxis from downtown Boston cost $30–45 with the Ted Williams Tunnel toll included. Ride-hails are comparable. The Sumner and Ted Williams tunnels both serve the airport; check traffic before departing, as both frequently back up. Logan is only 3 miles from downtown but tunnel congestion often extends that to 30+ minutes.

Facts

BOS–BFI Quick Facts

Key statistics for the Boston to Seattle route.
Route details
Distance2,488 mi / 4,003 km
Flight time4h 56m
Time difference-3 hours
Airlines (nonstop)0
1-stop connectionsAvailable
Origin: BOS
Full nameBoston Logan International Airport
IATA / ICAOBOS / KBOS
TimezoneAmerica/New_York
Passengers/yr42.2M
Elevation20 ft / 6 m
Destination: BFI
Full nameKing County International Airport - Boeing Field
IATA / ICAOBFI / KBFI
TimezoneAmerica/Los_Angeles
Passengers/yr0.1M
Elevation21 ft / 6 m
FAQ

Frequently Asked Questions

Common questions about BOS to BFI flights.
Nonstop flights from Boston Logan International Airport to King County International Airport - Boeing Field take about 4h 56m gate to gate. The route covers 2,488 miles.
Yes, 1-stop connections are available, ranked by layover time. Common connecting points include Salt Lake City and Los Angeles.
Seattle is 3 hours behind Boston.
Yes, return flights from BFI to BOS are available. Use the direction toggle at the top to view the return schedule.
Nearby alternatives include BED and PSM. See the Alternatives section for a full comparison.
Click the 'Search Flights' button to check availability and prices on Google Flights. You can also compare airlines and schedules on this page to find the best option.
See the On-Time Performance section for the latest delay data at both airports. This shows departure and arrival reliability to help you plan.
Route data is updated regularly from official airline schedules. On-time performance data comes from recent airport delay snapshots.

Flights from BOS to BFI

Boston Logan International Airport (BOS) and King County International Airport - Boeing Field (BFI) are connected through multiple connecting hub airports.

BOS to BFI Flight Duration and Schedule

Nonstop flight time from BOS to BFI is about 4 hours 56 minutes gate to gate. The route covers a distance of 2,488 miles (4,003 km).

Connecting Options and Alternatives

1-stop connecting options are also available, commonly via Salt Lake City and Los Angeles. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Bedford (BED) and Portsmouth (PSM).