Home / Routes / KSEA → KBOS3,149 scheduled

The route from Seattle Tacoma International Airport (KSEA) in Seattle to General Edward Lawrence Logan International Airport (KBOS) in Boston. SkyMeter tracks roughly 3,149 scheduled flights on this route across 14 carriers. The most active operator is ASA (ASA). Average block time is 4h 33m. Departures average 42 minutes off schedule, with 64% running more than 15 minutes late. The most common aircraft on this route is the AIRBUS Airbus A321 Neo.

Scheduled
3,149
last 494 days
ADS-B observed
778
Airlines
14
Avg dep delay
42m
Late >15 min
63.5%
Cancel rate
1.21%

Recent observed flights

From ADS-B trace data

2026-09-06 17:39  →  2026-09-06 22:47  ·  5h 7m
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2026-09-06 06:05  →  2026-09-06 11:22  ·  5h 16m
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2026-09-06 06:04  →  2026-09-06 11:21  ·  5h 17m
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2026-09-05 18:09  →  2026-09-05 23:35  ·  5h 26m
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2026-09-05 15:02  →  2026-09-05 20:11  ·  5h 8m
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2026-09-05 14:40  →  2026-09-05 19:54  ·  5h 13m
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2026-09-05 06:37  →  2026-09-05 11:57  ·  5h 20m
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2026-09-05 06:12  →  2026-09-05 11:17  ·  5h 4m
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2026-09-04 18:27  →  2026-09-04 23:31  ·  5h 4m
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2026-09-04 14:55  →  2026-09-04 20:06  ·  5h 11m
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Codeshare partnerships

Marketing carriers selling tickets on this route under their own flight numbers

sells ASA 1167
sells ASA 1023
sells ASA 843
sells ASA 785
sells DAL 739
sells DAL 575
sells DAL 358
sells ASA 356
sells ASA 356
sells JBU 262
sells ASA 197
sells DAL 178
sells DAL 174
sells JBU 158
sells JBU 154
sells DAL 146
sells ASA 106
sells JBU 29
sells DAL 20
sells JBU 13

Looking for the return flight?

View KBOS → KSEA