Compare live prices for BOS to SEA. Use the search panel
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BOS → SEAApprox. 4005.51 km11 May 2026Live inventory
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Showing 25
of 123
live flights
American Airlines
AA-1009
18:52
05/11/2026
BOS
General Edward Lawrence Logan International Airport
5h 44m
1 Stop
⏱ ORD · 0h 56mORD Airport
00:36
05/12/2026
+1
SEA
Seattle Tacoma International Airport
₹16,706
per person
✓ Refundable26 fare options
American Airlines
AA-2815
17:35
05/11/2026
BOS
General Edward Lawrence Logan International Airport
7h 1m
1 Stop
⏱ ORD · 2h 8mORD Airport
00:36
05/12/2026
+1
SEA
Seattle Tacoma International Airport
₹16,706
per person
✓ Refundable26 fare options
American Airlines
AA-1040
16:32
05/11/2026
BOS
General Edward Lawrence Logan International Airport
8h 4m
1 Stop
⏱ ORD · 3h 11mORD Airport
00:36
05/12/2026
+1
SEA
Seattle Tacoma International Airport
₹16,706
per person
✓ Refundable26 fare options
American Airlines
AA-2390
15:59
05/11/2026
BOS
General Edward Lawrence Logan International Airport
8h 37m
1 Stop
⏱ ORD · 3h 47mORD Airport
00:36
05/12/2026
+1
SEA
Seattle Tacoma International Airport
₹16,706
per person
✓ Refundable21 fare options
Delta Air Lines
DL-324
19:30
05/11/2026
BOS
General Edward Lawrence Logan International Airport
3h 10m
Non-stop
22:40
05/11/2026
SEA
Seattle Tacoma International Airport
₹17,099
per person
✕ Non-refundable4 fare options
American Airlines
AA-1897
17:54
05/11/2026
BOS
General Edward Lawrence Logan International Airport
6h 50m
1 Stop
⏱ DFW · 1h 6mDFW Airport
00:44
05/12/2026
+1
SEA
Seattle Tacoma International Airport
₹19,047
per person
✓ Refundable25 fare options
alaskaairlines
AS-306
18:42
05/11/2026
BOS
General Edward Lawrence Logan International Airport
3h 17m
Non-stop
21:59
05/11/2026
SEA
Seattle Tacoma International Airport
₹20,378
per person
✕ Non-refundable9 fare options
alaskaairlines
AS-459
07:00
05/11/2026
BOS
General Edward Lawrence Logan International Airport
3h 19m
Non-stop
10:19
05/11/2026
SEA
Seattle Tacoma International Airport
₹20,378
per person
✕ Non-refundable🔥 Last 3 seats9 fare options
United Airlines
UA-1015
18:39
05/11/2026
BOS
General Edward Lawrence Logan International Airport
5h 20m
1 Stop
⏱ ORD · 0h 40mORD Airport
23:59
05/11/2026
SEA
Seattle Tacoma International Airport
₹23,015
per person
✕ Non-refundable10 fare options
American Airlines
AA-1146
06:00
05/11/2026
BOS
General Edward Lawrence Logan International Airport
5h 34m
1 Stop
⏱ PHL · 0h 55mPHL Airport
11:34
05/11/2026
SEA
Seattle Tacoma International Airport
₹23,262
per person
✓ Refundable19 fare options
American Airlines
AA-1895
16:21
05/11/2026
BOS
General Edward Lawrence Logan International Airport
6h 37m
1 Stop
⏱ DFW · 0h 47mDFW Airport
22:58
05/11/2026
SEA
Seattle Tacoma International Airport
₹23,262
per person
✓ Refundable19 fare options
United Airlines
UA-1177
15:00
05/11/2026
BOS
General Edward Lawrence Logan International Airport
7h 47m
1 Stop
⏱ ORD · 3h 6mORD Airport
22:47
05/11/2026
SEA
Seattle Tacoma International Airport
₹23,415
per person
✕ Non-refundable🔥 Last 1 seats10 fare options
United Airlines
UA-1165
17:28
05/11/2026
BOS
General Edward Lawrence Logan International Airport
6h 31m
1 Stop
⏱ EWR · 1h 48mEWR Airport
23:59
05/11/2026
SEA
Seattle Tacoma International Airport
₹23,544
per person
✓ Refundable🔥 Last 3 seats9 fare options
United Airlines
UA-1053
15:32
05/11/2026
BOS
General Edward Lawrence Logan International Airport
8h 27m
1 Stop
⏱ EWR · 3h 44mEWR Airport
23:59
05/11/2026
SEA
Seattle Tacoma International Airport
₹23,544
per person
✓ Refundable🔥 Last 3 seats9 fare options
Delta Air Lines
DL-2889
15:55
05/11/2026
BOS
General Edward Lawrence Logan International Airport
3h 10m
Non-stop
19:05
05/11/2026
SEA
Seattle Tacoma International Airport
₹24,087
per person
✕ Non-refundable4 fare options
alaskaairlines
AS-215
09:00
05/11/2026
BOS
General Edward Lawrence Logan International Airport
3h 17m
Non-stop
12:17
05/11/2026
SEA
Seattle Tacoma International Airport
₹24,636
per person
✕ Non-refundable9 fare options
alaskaairlines
AS-1437
16:33
05/11/2026
BOS
General Edward Lawrence Logan International Airport
3h 22m
Non-stop
19:55
05/11/2026
SEA
Seattle Tacoma International Airport
₹24,636
per person
✕ Non-refundable11 fare options
Delta Air Lines
DL-479
06:15
05/11/2026
BOS
General Edward Lawrence Logan International Airport
8h 50m
1 Stop
⏱ LAX · 2h 35mLAX Airport
15:05
05/11/2026
SEA
Seattle Tacoma International Airport
₹24,831
per person
✕ Non-refundable4 fare options
American Airlines
AA-3209
15:16
05/11/2026
BOS
General Edward Lawrence Logan International Airport
9h 20m
1 Stop
⏱ ORD · 4h 30mORD Airport
00:36
05/12/2026
+1
SEA
Seattle Tacoma International Airport
₹24,911
per person
✓ Refundable20 fare options
Delta Air Lines
DL-318
16:30
05/11/2026
BOS
General Edward Lawrence Logan International Airport
7h 25m
1 Stop
⏱ LAX · 1h 10mLAX Airport
23:55
05/11/2026
SEA
Seattle Tacoma International Airport
₹25,251
per person
✕ Non-refundable3 fare options
Delta Air Lines
DL-384
07:48
05/11/2026
BOS
General Edward Lawrence Logan International Airport
3h 7m
Non-stop
10:55
05/11/2026
SEA
Seattle Tacoma International Airport
₹26,573
per person
✕ Non-refundable4 fare options
Delta Air Lines
DL-332
11:55
05/11/2026
BOS
General Edward Lawrence Logan International Airport
3h 10m
Non-stop
15:05
05/11/2026
SEA
Seattle Tacoma International Airport
₹26,573
per person
✕ Non-refundable4 fare options
Southwest Airlines
WN-892
17:05
05/11/2026
BOS
General Edward Lawrence Logan International Airport
6h 25m
1 Stop
⏱ DEN · 1h 45mDEN Airport
23:30
05/11/2026
SEA
Seattle Tacoma International Airport
₹26,685
per person
✕ Non-refundable🔥 Last 5 seats9 fare options
United Airlines
UA-2040
16:35
05/11/2026
BOS
General Edward Lawrence Logan International Airport
7h 24m
1 Stop
⏱ ORD · 2h 45mORD Airport
23:59
05/11/2026
SEA
Seattle Tacoma International Airport
₹26,733
per person
✓ Refundable🔥 Last 1 seats2 fare options
Southwest Airlines
WN-892
17:05
05/11/2026
BOS
General Edward Lawrence Logan International Airport
23h 50m
1 Stop
⏱ DEN · 19h 10mDEN Airport
16:55
05/12/2026
+1
SEA
Seattle Tacoma International Airport
₹27,024
per person
✕ Non-refundable🔥 Last 2 seats4 fare options
😕 No flights match your filters.
Boston (BOS)
📍 General Edward Lawrence Logan International Airport
🌍 United States
🕐 GMT -5
📐 Latitude: 42.36429977
📐 Longitude: -71.00520325
Seattle (SEA)
📍 Seattle Tacoma International Airport
🌍 United States
🕐 GMT -8
📐 Latitude: 47.449001
📐 Longitude: -122.308998
✈ Distance: Boston,USA to Seattle,USA — 4005.51 km
📅 Results on this page are loaded for 11 May 2026. Click View all flights for the complete live search.
Boston to Seattle — what to expect when booking
The BOS–SEA route is served by multiple carriers throughout the year.
Fares on this route can move quickly — a price available now may not be there 30 minutes later.
If your dates are flexible, try shifting your departure by a day or two using the date strip above.
Mid-week departures often show lower base fares compared to weekend starts on many routes.
The distance between Boston,USA and Seattle,USA is approximately
4005.51 km.
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❓ Frequently asked questions — Boston to Seattle flights
Generally yes — fares on most routes are most competitive around 4–6 weeks before departure. Booking earlier usually means better availability and a lower base fare when your dates are fixed.
The straight-line distance between Boston,USA (BOS) and Seattle,USA (SEA) is approximately 4005.51 km. Actual flying distance may vary slightly depending on routing.
Non-stop availability on this route varies by airline schedule and season. Use the filters below to quickly check whether direct options are available on your selected date.
Mid-week departures often show lower prices than weekend travel on many routes. Use the date strip above to compare nearby days quickly.