Home / Routes / KBOS → KSEA3,876 scheduled

The route from General Edward Lawrence Logan International Airport (KBOS) in Boston to Seattle Tacoma International Airport (KSEA) in Seattle. SkyMeter tracks roughly 3,876 scheduled flights on this route across 11 carriers. The most active operator is ASA (ASA). Average block time is 4h 58m. Departures average 37 minutes off schedule, with 61% running more than 15 minutes late. The most common aircraft on this route is the AIRBUS Airbus A321 Neo.

Scheduled
3,876
last 543 days
ADS-B observed
614
Airlines
11
Avg dep delay
37m
Late >15 min
61.1%
Cancel rate
0.98%

Recent observed flights

From ADS-B trace data

2026-10-25 13:02  →  2026-10-25 19:04  ·  6h 2m
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2026-10-25 11:50  →  2026-10-25 17:51  ·  6h 0m
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2026-10-25 11:07  →  2026-10-25 17:07  ·  5h 59m
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2026-10-24 23:20  →  2026-10-25 06:02  ·  6h 41m
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2026-10-24 22:45  →  2026-10-25 04:56  ·  6h 11m
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2026-10-24 22:37  →  2026-10-25 04:51  ·  6h 13m
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2026-10-24 20:59  →  2026-10-25 03:12  ·  6h 12m
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2026-10-24 14:45  →  2026-10-24 20:22  ·  5h 36m
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2026-10-24 13:06  →  2026-10-24 19:00  ·  5h 53m
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2026-10-24 12:00  →  2026-10-24 17:54  ·  5h 54m
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Codeshare partnerships

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

sells ASA 1168
sells ASA 1025
sells DAL 936
sells ASA 801
sells ASA 693
sells ASA 675
sells DAL 657
sells ASA 358
sells ASA 357
sells DAL 356
sells DAL 288
sells JBU 261
sells JBU 239
sells DAL 214
sells DAL 115
sells JBU 83
sells JBU 83
sells ASA 69
sells JBU 55
sells DAL 5

Looking for the return flight?

View KSEA → KBOS