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Route Reliability

Boston → Seattle

BOS–SEA · 2,496 miles · Boston Logan International Airport to Seattle–Tacoma International Airport

73
Usually Fine
WanderNerd Reliability Score
71%
Arrive within 15 minutes
8 min
Average arrival delay
1.2%
Cancelled
2,438
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.JetBlue Airways76%248 flights
  2. 2.Delta Air Lines72%979 flights
  3. 3.Alaska Airlines69%1,211 flights

What the data says

Morning flights do better here.

BOS–SEA flights departing between 6–9 AM arrived on time 77% of the time, versus 59% between 6–9 PM.

Thursday is the weak spot.

BOS–SEA flights arrived on time 75% of the time on Wednesdays. On Thursdays: 66%.

JetBlue Airways has a slight edge here.

JetBlue Airways arrived on time 76% of the time on this route; Alaska Airlines managed 69%.

Ticking up lately.

BOS–SEA flights arrived on time 66% of the time over the last three months in the data, compared with 62% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon74%(345 flights)
  • Tue70%(336 flights)
  • Wed75%(339 flights)
  • Thu66%(350 flights)
  • Fri72%(351 flights)
  • Sat73%(318 flights)
  • Sun69%(360 flights)
On-time by departure window
  • 6–9 AM77%(875 flights)
  • 9 AM–12 PM76%(554 flights)
  • 3–6 PM76%(231 flights)
  • 6–9 PM59%(739 flights)
On-time trend by month
79%
May

Jun 66% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%254
July 202562%267
August 202583%271
September 202586%228
October 202580%226
November 202579%162
December 202541%153
January 202670%124
February 202675%120
March 202641%170
April 202678%171
May 202679%253

Keep nerding

Based on 2,438 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.