- Plan, book, fly with confidence
- Be in the knowGet alerts if flight prices drop or rise*
- Book smarterSave up to 40% on select hotels after you book a flight*
￥24,760 Cheap United flights Seattle (SEA) to Boston (BOS)
Prices were available within the past 7 days and start at ￥24,760 for one-way flights and ￥41,170 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Sat, Sep 20 - Sat, Sep 27
SEA
Seattle
BOS
Boston
￥41,170 Roundtrip, found 2 days ago
￥41,170
Roundtrip
found 2 days ago
Sat, Sep 20 - Sat, Sep 27
SEA
Seattle
BOS
Boston
￥43,400 Roundtrip, found 2 days ago
￥43,400
Roundtrip
found 2 days ago
Mon, Sep 29 - Mon, Oct 6
SEA
Seattle
BOS
Boston
￥45,650 Roundtrip, found 1 day ago
￥45,650
Roundtrip
found 1 day ago
Sat, Sep 20 - Sat, Sep 27
SEA
Seattle
BOS
Boston
￥49,930 Roundtrip, found 2 days ago
￥49,930
Roundtrip
found 2 days ago
Tue, Mar 17 - Sat, Mar 21
SEA
Seattle
BOS
Boston
￥54,730 Roundtrip, found 21 hours ago
￥54,730
Roundtrip
found 21 hours ago
Tue, Mar 17 - Sat, Mar 21
SEA
Seattle
BOS
Boston
￥55,510 Roundtrip, found 21 hours ago
￥55,510
Roundtrip
found 21 hours ago
Tue, Mar 17 - Sat, Mar 21
SEA
Seattle
BOS
Boston
￥58,390 Roundtrip, found 21 hours ago
￥58,390
Roundtrip
found 21 hours ago
Tue, Mar 17 - Sat, Mar 21
SEA
Seattle
BOS
Boston
￥59,120 Roundtrip, found 21 hours ago
￥59,120
Roundtrip
found 21 hours ago
Tue, Mar 17 - Sat, Mar 21
SEA
Seattle
BOS
Boston
￥63,680 Roundtrip, found 21 hours ago
￥63,680
Roundtrip
found 21 hours ago
Origin airport | Seattle - Tacoma Intl. |
Destination airport | Logan Intl. |
Airlines serving | American Airlines, Delta, United |
Popular airline | American Airlines |
Distance | 3980 km |
Average flight time | 8 hours 41 mins |
- Trending United Flights
- Trending Routes
- Airlines Operating
- Nearby Airports
- Flights from Other Cities
- Expedia's Latest Trends
Most Popular United Routes from Boston
- Tokyo to Guam (NRT - GUM)
- Tokyo to New York (HND - JFK)
- Tokyo to Newark Liberty Intl. Airport (HND - EWR)
- Tokyo to Honolulu (NRT - HNL)
- Tokyo to Newark Liberty Intl. Airport (HND - EWR)
- Tokyo to Guam (NRT - GUM)
- Osaka to Los Angeles (KIX - LAX)
- Tokyo to Los Angeles (NRT - LAX)
- Tokyo to New York (HND - JFK)
- Tokyo to Los Angeles (HND - LAX)
Popular Domestic Routes in Logan Intl.
- Tokyo to Cebu (NRT - CEB)
- Tokyo to New York (HND - LGA)
- Osaka to Los Angeles (KIX - LAX)
- Osaka to Manila (KIX - MNL)
- Tokyo to Los Angeles (HND - LAX)
- Tokyo to Vancouver (HND - YVR)
- Tokyo to Manila (NRT - MNL)
- Tokyo to Honolulu (NRT - HNL)
- Tokyo to Newark Liberty Intl. Airport (HND - EWR)
- Tokyo to Honolulu (HND - HNL)
Expedia's Latest Trends
Flights
- Flights from Narita (NRT) to Las Vegas (LAS)
- Flights from Seattle (SEA) to Narita (NRT)
- Flights from Narita (NRT) to Dallas (DFW)
- Flights from Seattle (SEA) to San Francisco (SFO)
- Delta Tokyo (HND) to Seattle (SEA) flights
- Flights from Tokyo (HND) to Dallas (DFW)
- Flights from Narita (NRT) to San Diego (SAN)
- Flights from Narita (NRT) to Boston (BOS)
- Flights from Narita (NRT) to St. Louis (STL)
- Flights from Tokyo (HND) to Boston (BOS)
- Flights from Tokyo (HND) to Philadelphia (PHL)
- Flights from San Diego (SAN) to Narita (NRT)
- Flights from Osaka (KIX) to Boston (BOS)
- Flights from Santa Ana (SNA) to Las Vegas (LAS)
- Flights from Narita (NRT) to Seattle (SEA)
- Flights from Boston (BOS) to Narita (NRT)
- Flights from Narita (NRT) to Philadelphia (PHL)
- Flights from Los Angeles Intl. to NYC-All Airports
- Flights from Kansai Intl. to NYC-All Airports
- Flights from Osaka (KIX) to Seattle (SEA)
- Flights from Narita (NRT) to Anchorage (ANC)
- Flights from Narita (NRT) to Pittsburgh (PIT)
- Flights from Dallas (DFW) to Narita (NRT)
- Flights from Seattle (SEA) to Tokyo (HND)
- Flights from Tokyo (HND) to Seattle (SEA)
- Flights from Tokyo (HND) to San Diego (SAN)
- Flights from Seattle (SEA) to Los Angeles (LAX)
- Flights from Narita (NRT) to Columbus (CMH)
- Flights from Narita Intl. to NYC-All Airports
- Flights from Los Angeles (LAX) to Las Vegas (LAS)
*Available to Expedia members.