ah, math

Look at the great bit of math the computer gave us for total travel time.

Flight to Boston
Flight: 2 Round-Trip Tickets
All flight times are local to each city.
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Seattle/Tacoma International Airport, (SEA) to Boston Logan International Airport, (BOS)

Flight: Alaska Airlines Flight 12 (on Boeing 737-800)
Depart: 08:45 AM, Seattle/Tacoma, WA (SEA)
Arrive: 05:03 PM, Boston, MA (BOS)

Total Travel Time: 8 hrs 18 mins
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Boston Logan International Airport, (BOS) to Seattle/Tacoma International Airport, (SEA)

Flight: Alaska Airlines Flight 15 (on Boeing 737-800)
Depart: 06:05 PM, Boston, MA (BOS)
Arrive: 09:23 PM, Seattle/Tacoma, WA (SEA)

Total Travel Time: 3 hrs 18 mins

So, we're averaging 300 mph on the way there and 750 mph on the way back. (Keep in mind that Mach 1 is 761 mph). Air travel really is amazing these days.